View
public
class
View
extends Object
implements
AccessibilityEventSource,
Drawable.Callback,
KeyEvent.Callback
| java.lang.Object | |
| ↳ | android.view.View |
This class represents the basic building block for user interface components. A View
occupies a rectangular area on the screen and is responsible for drawing and
event handling. View is the base class for widgets, which are
used to create interactive UI components (buttons, text fields, etc.). The
ViewGroup subclass is the base class for layouts, which
are invisible containers that hold other Views (or other ViewGroups) and define
their layout properties.
Developer Guides
For information about using this class to develop your application's user interface, read the User Interface developer guide.
Using Views
All of the views in a window are arranged in a single tree. You can add views either from code or by specifying a tree of views in one or more XML layout files. There are many specialized subclasses of views that act as controls or are capable of displaying text, images, or other content.
Once you have created a tree of views, there are typically a few types of common operations you may wish to perform:
- Set properties: for example setting the text of a
TextView. The available properties and the methods that set them will vary among the different subclasses of views. Note that properties that are known at build time can be set in the XML layout files. - Set focus: The framework will handle moving focus in
response to user input. To force focus to a specific view, call
requestFocus(). - Set up listeners: Views allow clients to set listeners
that will be notified when something interesting happens to the view. For
example, all views will let you set a listener to be notified when the view
gains or loses focus. You can register such a listener using
setOnFocusChangeListener(android.view.View.OnFocusChangeListener). Other view subclasses offer more specialized listeners. For example, a Button exposes a listener to notify clients when the button is clicked. - Set visibility: You can hide or show views using
setVisibility(int).
Note: The Android framework is responsible for measuring, laying out and
drawing views. You should not call methods that perform these actions on
views yourself unless you are actually implementing a
ViewGroup.
Implementing a Custom View
To implement a custom view, you will usually begin by providing overrides for
some of the standard methods that the framework calls on all views. You do
not need to override all of these methods. In fact, you can start by just
overriding onDraw(android.graphics.Canvas).
| Category | Methods | Description |
|---|---|---|
| Creation | Constructors | There is a form of the constructor that are called when the view is created from code and a form that is called when the view is inflated from a layout file. The second form should parse and apply any attributes defined in the layout file. |
|
Called after a view and all of its children has been inflated from XML. | |
| Layout | |
Called to determine the size requirements for this view and all of its children. |
|
Called when this view should assign a size and position to all of its children. | |
|
Called when the size of this view has changed. | |
| Drawing | |
Called when the view should render its content. |
| Event processing | |
Called when a new hardware key event occurs. |
|
Called when a hardware key up event occurs. | |
|
Called when a trackball motion event occurs. | |
|
Called when a motion event occurs with pointers down on the view. | |
|
Called when a generic motion event occurs. | |
|
Called when a hover motion event occurs. | |
| Focus | |
Called when the view gains or loses focus. |
|
Called when the window containing the view gains or loses focus. | |
| Attaching | |
Called when the view is attached to a window. |
|
Called when the view is detached from its window. | |
|
Called when the visibility of the window containing the view has changed. |
IDs
Views may have an integer id associated with them. These ids are typically assigned in the layout XML files, and are used to find specific views within the view tree. A common pattern is to:- Define a Button in the layout file and assign it a unique ID.
<Button android:id="@+id/my_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/my_button_text"/> - From the onCreate method of an Activity, find the Button
Button myButton = findViewById(R.id.my_button);
View IDs need not be unique throughout the tree, but it is good practice to ensure that they are at least unique within the part of the tree you are searching.
Position
The geometry of a view is that of a rectangle. A view has a location, expressed as a pair of left and top coordinates, and two dimensions, expressed as a width and a height. The unit for location and dimensions is the pixel.
It is possible to retrieve the location of a view by invoking the methods
getLeft() and getTop(). The former returns the left, or X,
coordinate of the rectangle representing the view. The latter returns the
top, or Y, coordinate of the rectangle representing the view. These methods
both return the location of the view relative to its parent. For instance,
when getLeft() returns 20, that means the view is located 20 pixels to the
right of the left edge of its direct parent.
In addition, several convenience methods are offered to avoid unnecessary
computations, namely getRight() and getBottom().
These methods return the coordinates of the right and bottom edges of the
rectangle representing the view. For instance, calling getRight()
is similar to the following computation: getLeft() + getWidth()
(see Size for more information about the width.)
Size, padding and margins
The size of a view is expressed with a width and a height. A view actually possess two pairs of width and height values.
The first pair is known as measured width and
measured height. These dimensions define how big a view wants to be
within its parent (see Layout for more details.) The
measured dimensions can be obtained by calling getMeasuredWidth()
and getMeasuredHeight().
The second pair is simply known as width and height, or
sometimes drawing width and drawing height. These
dimensions define the actual size of the view on screen, at drawing time and
after layout. These values may, but do not have to, be different from the
measured width and height. The width and height can be obtained by calling
getWidth() and getHeight().
To measure its dimensions, a view takes into account its padding. The padding
is expressed in pixels for the left, top, right and bottom parts of the view.
Padding can be used to offset the content of the view by a specific amount of
pixels. For instance, a left padding of 2 will push the view's content by
2 pixels to the right of the left edge. Padding can be set using the
setPadding(int, int, int, int) or setPaddingRelative(int, int, int, int)
method and queried by calling getPaddingLeft(), getPaddingTop(),
getPaddingRight(), getPaddingBottom(), getPaddingStart(),
getPaddingEnd().
Even though a view can define a padding, it does not provide any support for
margins. However, view groups provide such a support. Refer to
ViewGroup and
ViewGroup.MarginLayoutParams for further information.
Layout
Layout is a two pass process: a measure pass and a layout pass. The measuring
pass is implemented in measure(int, int) and is a top-down traversal
of the view tree. Each view pushes dimension specifications down the tree
during the recursion. At the end of the measure pass, every view has stored
its measurements. The second pass happens in
layout(int, int, int, int) and is also top-down. During
this pass each parent is responsible for positioning all of its children
using the sizes computed in the measure pass.
When a view's measure() method returns, its getMeasuredWidth() and
getMeasuredHeight() values must be set, along with those for all of
that view's descendants. A view's measured width and measured height values
must respect the constraints imposed by the view's parents. This guarantees
that at the end of the measure pass, all parents accept all of their
children's measurements. A parent view may call measure() more than once on
its children. For example, the parent may measure each child once with
unspecified dimensions to find out how big they want to be, then call
measure() on them again with actual numbers if the sum of all the children's
unconstrained sizes is too big or too small.
The measure pass uses two classes to communicate dimensions. The
MeasureSpec class is used by views to tell their parents how they
want to be measured and positioned. The base LayoutParams class just
describes how big the view wants to be for both width and height. For each
dimension, it can specify one of:
- an exact number
- MATCH_PARENT, which means the view wants to be as big as its parent (minus padding)
- WRAP_CONTENT, which means that the view wants to be just big enough to enclose its content (plus padding).
MeasureSpecs are used to push requirements down the tree from parent to child. A MeasureSpec can be in one of three modes:
- UNSPECIFIED: This is used by a parent to determine the desired dimension of a child view. For example, a LinearLayout may call measure() on its child with the height set to UNSPECIFIED and a width of EXACTLY 240 to find out how tall the child view wants to be given a width of 240 pixels.
- EXACTLY: This is used by the parent to impose an exact size on the child. The child must use this size, and guarantee that all of its descendants will fit within this size.
- AT_MOST: This is used by the parent to impose a maximum size on the child. The child must guarantee that it and all of its descendants will fit within this size.
To initiate a layout, call requestLayout(). This method is typically
called by a view on itself when it believes that it can no longer fit within
its current bounds.
Drawing
Drawing is handled by walking the tree and recording the drawing commands of any View that needs to update. After this, the drawing commands of the entire tree are issued to screen, clipped to the newly damaged area.
The tree is largely recorded and drawn in order, with parents drawn before
(i.e., behind) their children, with siblings drawn in the order they appear
in the tree. If you set a background drawable for a View, then the View will
draw it before calling back to its onDraw() method. The child
drawing order can be overridden with
custom child drawing order
in a ViewGroup, and with setZ(float) custom Z values} set on Views.
To force a view to draw, call invalidate().
Event Handling and Threading
The basic cycle of a view is as follows:
- An event comes in and is dispatched to the appropriate view. The view handles the event and notifies any listeners.
- If in the course of processing the event, the view's bounds may need
to be changed, the view will call
requestLayout(). - Similarly, if in the course of processing the event the view's appearance
may need to be changed, the view will call
invalidate(). - If either
requestLayout()orinvalidate()were called, the framework will take care of measuring, laying out, and drawing the tree as appropriate.
Note: The entire view tree is single threaded. You must always be on
the UI thread when calling any method on any view.
If you are doing work on other threads and want to update the state of a view
from that thread, you should use a Handler.
Focus Handling
The framework will handle routine focus movement in response to user input.
This includes changing the focus as views are removed or hidden, or as new
views become available. Views indicate their willingness to take focus
through the isFocusable() method. To change whether a view can take
focus, call setFocusable(boolean). When in touch mode (see notes below)
views indicate whether they still would like focus via isFocusableInTouchMode()
and can change this via setFocusableInTouchMode(boolean).
Focus movement is based on an algorithm which finds the nearest neighbor in a given direction. In rare cases, the default algorithm may not match the intended behavior of the developer. In these situations, you can provide explicit overrides by using these XML attributes in the layout file:
nextFocusDown nextFocusLeft nextFocusRight nextFocusUp
To get a particular view to take focus, call requestFocus().
Touch Mode
When a user is navigating a user interface via directional keys such as a D-pad, it is necessary to give focus to actionable items such as buttons so the user can see what will take input. If the device has touch capabilities, however, and the user begins interacting with the interface by touching it, it is no longer necessary to always highlight, or give focus to, a particular view. This motivates a mode for interaction named 'touch mode'.
For a touch capable device, once the user touches the screen, the device
will enter touch mode. From this point onward, only views for which
isFocusableInTouchMode() is true will be focusable, such as text editing widgets.
Other views that are touchable, like buttons, will not take focus when touched; they will
only fire the on click listeners.
Any time a user hits a directional key, such as a D-pad direction, the view device will exit touch mode, and find a view to take focus, so that the user may resume interacting with the user interface without touching the screen again.
The touch mode state is maintained across Activitys. Call
isInTouchMode() to see whether the device is currently in touch mode.
Scrolling
The framework provides basic support for views that wish to internally
scroll their content. This includes keeping track of the X and Y scroll
offset as well as mechanisms for drawing scrollbars. See
scrollBy(int, int), scrollTo(int, int), and
awakenScrollBars() for more details.
Tags
Unlike IDs, tags are not used to identify views. Tags are essentially an extra piece of information that can be associated with a view. They are most often used as a convenience to store data related to views in the views themselves rather than by putting them in a separate structure.
Tags may be specified with character sequence values in layout XML as either
a single tag using the android:tag
attribute or multiple tags using the <tag> child element:
<View ...
android:tag="@string/mytag_value" />
<View ...>
<tag android:id="@+id/mytag"
android:value="@string/mytag_value" />
</View>
Tags may also be specified with arbitrary objects from code using
setTag(java.lang.Object) or setTag(int, java.lang.Object).
Themes
By default, Views are created using the theme of the Context object supplied
to their constructor; however, a different theme may be specified by using
the android:theme attribute in layout
XML or by passing a ContextThemeWrapper to the constructor from
code.
When the android:theme attribute is
used in XML, the specified theme is applied on top of the inflation
context's theme (see LayoutInflater) and used for the view itself as
well as any child elements.
In the following example, both views will be created using the Material dark
color scheme; however, because an overlay theme is used which only defines a
subset of attributes, the value of
android:colorAccent defined on
the inflation context's theme (e.g. the Activity theme) will be preserved.
<LinearLayout
...
android:theme="@android:theme/ThemeOverlay.Material.Dark">
<View ...>
</LinearLayout>
Properties
The View class exposes an ALPHA property, as well as several transform-related
properties, such as TRANSLATION_X and TRANSLATION_Y. These properties are
available both in the Property form as well as in similarly-named setter/getter
methods (such as setAlpha(float) for ALPHA). These properties can
be used to set persistent state associated with these rendering-related properties on the view.
The properties and methods can also be used in conjunction with
Animator-based animations, described more in the
Animation section.
Animation
Starting with Android 3.0, the preferred way of animating views is to use the
android.animation package APIs. These Animator-based
classes change actual properties of the View object, such as alpha and
translationX. This behavior is contrasted to that of the pre-3.0
Animation-based classes, which instead animate only
how the view is drawn on the display. In particular, the ViewPropertyAnimator class
makes animating these View properties particularly easy and efficient.
Alternatively, you can use the pre-3.0 animation classes to animate how Views are rendered.
You can attach an Animation object to a view using
setAnimation(android.view.animation.Animation) or
startAnimation(android.view.animation.Animation). The animation can alter the scale,
rotation, translation and alpha of a view over time. If the animation is
attached to a view that has children, the animation will affect the entire
subtree rooted by that node. When an animation is started, the framework will
take care of redrawing the appropriate views until the animation completes.
Security
Sometimes it is essential that an application be able to verify that an action is being performed with the full knowledge and consent of the user, such as granting a permission request, making a purchase or clicking on an advertisement. Unfortunately, a malicious application could try to spoof the user into performing these actions, unaware, by concealing the intended purpose of the view. As a remedy, the framework offers a touch filtering mechanism that can be used to improve the security of views that provide access to sensitive functionality.
To enable touch filtering, call setFilterTouchesWhenObscured(boolean) or set the
android:filterTouchesWhenObscured layout attribute to true. When enabled, the framework
will discard touches that are received whenever the view's window is obscured by
another visible window at the touched location. As a result, the view will not receive touches
whenever the touch passed through a toast, dialog or other window that appears above the view's
window.
For more fine-grained control over security, consider overriding the
onFilterTouchEventForSecurity(android.view.MotionEvent) method to implement your own
security policy. See also MotionEvent.FLAG_WINDOW_IS_OBSCURED.
See also:
Summary
Nested classes | ||
|---|---|---|
class |
View.AccessibilityDelegate
This class represents a delegate that can be registered in a |
|
class |
View.BaseSavedState
Base class for derived classes that want to save and restore their own
state in |
|
class |
View.DragShadowBuilder
Creates an image that the system displays during the drag and drop operation. |
|
class |
View.MeasureSpec
A MeasureSpec encapsulates the layout requirements passed from parent to child. |
|
interface |
View.OnApplyWindowInsetsListener
Listener for applying window insets on a view in a custom way. |
|
interface |
View.OnAttachStateChangeListener
Interface definition for a callback to be invoked when this view is attached or detached from its window. |
|
interface |
View.OnCapturedPointerListener
Interface definition for a callback to be invoked when a captured pointer event is being dispatched this view. |
|
interface |
View.OnClickListener
Interface definition for a callback to be invoked when a view is clicked. |
|
interface |
View.OnContextClickListener
Interface definition for a callback to be invoked when a view is context clicked. |
|
interface |
View.OnCreateContextMenuListener
Interface definition for a callback to be invoked when the context menu for this view is being built. |
|
interface |
View.OnDragListener
Interface definition for a listener that's invoked when a drag event is dispatched to this view. |
|
interface |
View.OnFocusChangeListener
Interface definition for a callback to be invoked when the focus state of a view changed. |
|
interface |
View.OnGenericMotionListener
Interface definition for a callback to be invoked when a generic motion event is dispatched to this view. |
|
interface |
View.OnHoverListener
Interface definition for a callback to be invoked when a hover event is dispatched to this view. |
|
interface |
View.OnKeyListener
Interface definition for a callback to be invoked when a hardware key event is dispatched to this view. |
|
interface |
View.OnLayoutChangeListener
Interface definition for a callback to be invoked when the layout bounds of a view changes due to layout processing. |
|
interface |
View.OnLongClickListener
Interface definition for a callback to be invoked when a view has been clicked and held. |
|
interface |
View.OnScrollChangeListener
Interface definition for a callback to be invoked when the scroll X or Y positions of a view change. |
|
interface |
View.OnSystemUiVisibilityChangeListener
This interface was deprecated
in API level 30.
Use |
|
interface |
View.OnTouchListener
Interface definition for a callback to be invoked when a touch event is dispatched to this view. |
|
interface |
View.OnUnhandledKeyEventListener
Interface definition for a callback to be invoked when a hardware key event hasn't been handled by the view hierarchy. |
|
XML attributes | ||
|---|---|---|
android:accessibilityHeading |
Whether or not this view is a heading for accessibility purposes. | |
android:accessibilityLiveRegion |
Indicates to accessibility services whether the user should be notified when this view changes. | |
android:accessibilityPaneTitle |
The title this view should present to accessibility as a pane title. | |
android:accessibilityTraversalAfter |
Sets the id of a view that screen readers are requested to visit before this view. | |
android:accessibilityTraversalBefore |
Sets the id of a view that screen readers are requested to visit after this view. | |
android:allowClickWhenDisabled |
Whether or not allow clicks on disabled view. | |
android:alpha |
alpha property of the view, as a value between 0 (completely transparent) and 1 (completely opaque). | |
android:autoHandwritingEnabled |
Whether or not the auto handwriting initiation is enabled in this View. |
|
android:autofillHints |
Describes the content of a view so that a autofill service can fill in the appropriate data. | |
android:autofilledHighlight |
Drawable to be drawn over the view to mark it as autofilled
May be a reference to another resource, in the form
" |
|
android:background |
A drawable to use as the background. | |
android:backgroundTint |
Tint to apply to the background. | |
android:backgroundTintMode |
Blending mode used to apply the background tint. | |
android:clickable |
Defines whether this view reacts to click events. | |
android:clipToOutline |
Whether the View's Outline should be used to clip the contents of the View. |
|
android:contentDescription |
Defines text that briefly describes content of the view. | |
android:contextClickable |
Defines whether this view reacts to context click events. | |
android:defaultFocusHighlightEnabled |
Whether this View should use a default focus highlight when it gets focused but
doesn't have R.attr.state_focused defined in its background.
|
|
android:drawingCacheQuality |
Defines the quality of translucent drawing caches. | |
android:duplicateParentState |
When this attribute is set to true, the view gets its drawable state (focused, pressed, etc.) from its direct parent rather than from itself. | |
android:elevation |
base z depth of the view. | |
android:fadeScrollbars |
Defines whether to fade out scrollbars when they are not in use. | |
android:fadingEdgeLength |
Defines the length of the fading edges. | |
android:filterTouchesWhenObscured |
Specifies whether to filter touches when the view's window is obscured by another visible window. | |
android:fitsSystemWindows |
Boolean internal attribute to adjust view layout based on system windows such as the status bar. | |
android:focusable |
Controls whether a view can take focus. | |
android:focusableInTouchMode |
Boolean that controls whether a view can take focus while in touch mode. | |
android:focusedByDefault |
Whether this view is a default-focus view. | |
android:forceHasOverlappingRendering |
Whether this view has elements that may overlap when drawn. | |
android:foreground |
Defines the drawable to draw over the content. | |
android:foregroundGravity |
Defines the gravity to apply to the foreground drawable. | |
android:foregroundTint |
Tint to apply to the foreground. | |
android:foregroundTintMode |
Blending mode used to apply the foreground tint. | |
android:hapticFeedbackEnabled |
Boolean that controls whether a view should have haptic feedback enabled for events such as long presses. | |
android:id |
Supply an identifier name for this view, to later retrieve it
with View.findViewById() or
Activity.findViewById().
|
|
android:importantForAccessibility |
Describes whether or not this view is important for accessibility. | |
android:importantForAutofill |
Hints the Android System whether the view node associated with this View should be included in a view structure used for autofill purposes. | |
android:importantForContentCapture |
Hints the Android System whether the view node associated with this View should be use for content capture purposes. | |
android:isCredential |
Boolean that hints the Android System that the view is credential and associated with
CredentialManager
May be a boolean value, such as " |
|
android:isScrollContainer |
Set this if the view will serve as a scrolling container, meaning that it can be resized to shrink its overall window so that there will be space for an input method. | |
android:keepScreenOn |
Controls whether the view's window should keep the screen on while visible. | |
android:keyboardNavigationCluster |
Whether this view is a root of a keyboard navigation cluster. | |
android:layerType |
Specifies the type of layer backing this view. | |
android:layoutDirection |
Defines the direction of layout drawing. | |
android:longClickable |
Defines whether this view reacts to long click events. | |
android:minHeight |
Defines the minimum height of the view. | |
android:minWidth |
Defines the minimum width of the view. | |
android:nextClusterForward |
Defines the next keyboard navigation cluster. | |
android:nextFocusDown |
Defines the next view to give focus to when the next focus is
View.FOCUS_DOWN
If the reference refers to a view that does not exist or is part
of a hierarchy that is invisible, a RuntimeException
will result when the reference is accessed.
|
|
android:nextFocusForward |
Defines the next view to give focus to when the next focus is
View.FOCUS_FORWARD
If the reference refers to a view that does not exist or is part
of a hierarchy that is invisible, a RuntimeException
will result when the reference is accessed.
|
|
android:nextFocusLeft |
Defines the next view to give focus to when the next focus is
View.FOCUS_LEFT.
|
|
android:nextFocusRight |
Defines the next view to give focus to when the next focus is
View.FOCUS_RIGHT
If the reference refers to a view that does not exist or is part
of a hierarchy that is invisible, a RuntimeException
will result when the reference is accessed.
|
|
android:nextFocusUp |
Defines the next view to give focus to when the next focus is
View.FOCUS_UP
If the reference refers to a view that does not exist or is part
of a hierarchy that is invisible, a RuntimeException
will result when the reference is accessed.
|
|
android:onClick |
Name of the method in this View's context to invoke when the view is clicked. | |
android:outlineAmbientShadowColor |
Sets the color of the ambient shadow that is drawn when the view has a positive Z or elevation value. | |
android:outlineSpotShadowColor |
Sets the color of the spot shadow that is drawn when the view has a positive Z or elevation value. | |
android:padding |
Sets the padding, in pixels, of all four edges. | |
android:paddingBottom |
Sets the padding, in pixels, of the bottom edge; see R.attr.padding.
|
|
android:paddingEnd |
Sets the padding, in pixels, of the end edge; see R.attr.padding.
|
|
android:paddingHorizontal |
Sets the padding, in pixels, of the left and right edges; see
R.attr.padding.
|
|
android:paddingLeft |
Sets the padding, in pixels, of the left edge; see R.attr.padding.
|
|
android:paddingRight |
Sets the padding, in pixels, of the right edge; see R.attr.padding.
|
|
android:paddingStart |
Sets the padding, in pixels, of the start edge; see R.attr.padding.
|
|
android:paddingTop |
Sets the padding, in pixels, of the top edge; see R.attr.padding.
|
|
android:paddingVertical |
Sets the padding, in pixels, of the top and bottom edges; see
R.attr.padding.
|
|
android:preferKeepClear |
Sets a preference to keep the bounds of this view clear from floating windows above this view's window. |
|
android:requiresFadingEdge |
Defines which edges should be faded on scrolling. | |
android:rotation |
rotation of the view, in degrees. | |
android:rotationX |
rotation of the view around the x axis, in degrees. | |
android:rotationY |
rotation of the view around the y axis, in degrees. | |
android:saveEnabled |
If false, no state will be saved for this view when it is being frozen. | |
android:scaleX |
scale of the view in the x direction. | |
android:scaleY |
scale of the view in the y direction. | |
android:screenReaderFocusable |
Whether this view should be treated as a focusable unit by screen reader accessibility tools. | |
android:scrollIndicators |
Defines which scroll indicators should be displayed when the view can be scrolled. | |
android:scrollX |
The initial horizontal scroll offset, in pixels. | |
android:scrollY |
The initial vertical scroll offset, in pixels. | |
android:scrollbarAlwaysDrawHorizontalTrack |
Defines whether the horizontal scrollbar track should always be drawn. | |
android:scrollbarAlwaysDrawVerticalTrack |
Defines whether the vertical scrollbar track should always be drawn. | |
android:scrollbarDefaultDelayBeforeFade |
Defines the delay in milliseconds that a scrollbar waits before fade out. | |
android:scrollbarFadeDuration |
Defines the delay in milliseconds that a scrollbar takes to fade out. | |
android:scrollbarSize |
Sets the width of vertical scrollbars and height of horizontal scrollbars. | |
android:scrollbarStyle |
Controls the scrollbar style and position. | |
android:scrollbarThumbHorizontal |
Defines the horizontal scrollbar thumb drawable. | |
android:scrollbarThumbVertical |
Defines the vertical scrollbar thumb drawable. | |
android:scrollbarTrackHorizontal |
Defines the horizontal scrollbar track drawable. | |
android:scrollbarTrackVertical |
Defines the vertical scrollbar track drawable. | |
android:scrollbars |
Defines which scrollbars should be displayed on scrolling or not. | |
android:soundEffectsEnabled |
Boolean that controls whether a view should have sound effects enabled for events such as clicking and touching. | |
android:stateListAnimator |
Sets the state-based animator for the View. | |
android:supplementalDescription |
Provides brief supplemental information for the view, such as the purpose of the view when that purpose is not conveyed within its textual representation. | |
android:tag |
Supply a tag for this view containing a String, to be retrieved
later with View.getTag() or
searched for with View.findViewWithTag().
|
|
android:textAlignment |
Defines the alignment of the text. | |
android:textDirection |
Defines the direction of the text. | |
android:theme |
Specifies a theme override for a view. | |
android:tooltipText |
Defines text displayed in a small popup window on hover or long press. | |
android:transformPivotX |
x location of the pivot point around which the view will rotate and scale. | |
android:transformPivotY |
y location of the pivot point around which the view will rotate and scale. | |
android:transitionName |
Names a View such that it can be identified for Transitions. | |
android:translationX |
translation in x of the view. | |
android:translationY |
translation in y of the view. | |
android:translationZ |
translation in z of the view. | |
android:visibility |
Controls the initial visibility of the view. | |
Constants | |
|---|---|
int |
ACCESSIBILITY_DATA_SENSITIVE_AUTO
Automatically determine whether the view should only allow interactions from
|
int |
ACCESSIBILITY_DATA_SENSITIVE_NO
Allow interactions from all |
int |
ACCESSIBILITY_DATA_SENSITIVE_YES
Only allow interactions from |
int |
ACCESSIBILITY_LIVE_REGION_ASSERTIVE
Live region mode specifying that accessibility services should immediately notify users of changes to this view. |
int |
ACCESSIBILITY_LIVE_REGION_NONE
Live region mode specifying that accessibility services should not automatically announce changes to this view. |
int |
ACCESSIBILITY_LIVE_REGION_POLITE
Live region mode specifying that accessibility services should notify users of changes to this view. |
int |
AUTOFILL_FLAG_INCLUDE_NOT_IMPORTANT_VIEWS
Flag requesting you to add views that are marked as not important for autofill
(see |
String |
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE
Hint indicating that this view can be autofilled with a credit card expiration date. |
String |
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY
Hint indicating that this view can be autofilled with a credit card expiration day. |
String |
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH
Hint indicating that this view can be autofilled with a credit card expiration month. |
String |
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR
Hint indicating that this view can be autofilled with a credit card expiration year. |
String |
AUTOFILL_HINT_CREDIT_CARD_NUMBER
Hint indicating that this view can be autofilled with a credit card number. |
String |
AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE
Hint indicating that this view can be autofilled with a credit card security code. |
String |
AUTOFILL_HINT_EMAIL_ADDRESS
Hint indicating that this view can be autofilled with an email address. |
String |
AUTOFILL_HINT_NAME
Hint indicating that this view can be autofilled with a user's real name. |
String |
AUTOFILL_HINT_PASSWORD
Hint indicating that this view can be autofilled with a password. |
String |
AUTOFILL_HINT_PHONE
Hint indicating that this view can be autofilled with a phone number. |
String |
AUTOFILL_HINT_POSTAL_ADDRESS
Hint indicating that this view can be autofilled with a postal address. |
String |
AUTOFILL_HINT_POSTAL_CODE
Hint indicating that this view can be autofilled with a postal code. |
String |
AUTOFILL_HINT_USERNAME
Hint indicating that this view can be autofilled with a username. |
int |
AUTOFILL_TYPE_DATE
Autofill type for a field that contains a date, which is represented by a long representing
the number of milliseconds since the standard base time known as "the epoch", namely
January 1, 1970, 00:00:00 GMT (see |
int |
AUTOFILL_TYPE_LIST
Autofill type for a selection list field, which is filled by an |
int |
AUTOFILL_TYPE_NONE
Autofill type for views that cannot be autofilled. |
int |
AUTOFILL_TYPE_TEXT
Autofill type for a text field, which is filled by a |
int |
AUTOFILL_TYPE_TOGGLE
Autofill type for a togglable field, which is filled by a |
int |
CONTENT_SENSITIVITY_AUTO
Content sensitivity is determined by the framework. |
int |
CONTENT_SENSITIVITY_NOT_SENSITIVE
The view doesn't display sensitive content. |
int |
CONTENT_SENSITIVITY_SENSITIVE
The view displays sensitive content. |
int |
DRAG_FLAG_ACCESSIBILITY_ACTION
Flag indicating that the drag was initiated with
|
int |
DRAG_FLAG_GLOBAL
Flag indicating that a drag can cross window boundaries. |
int |
DRAG_FLAG_GLOBAL_PERSISTABLE_URI_PERMISSION
When this flag is used with |
int |
DRAG_FLAG_GLOBAL_PREFIX_URI_PERMISSION
When this flag is used with |
int |
DRAG_FLAG_GLOBAL_SAME_APPLICATION
Flag indicating that a drag can cross window boundaries (within the same application). |
int |
DRAG_FLAG_GLOBAL_URI_READ
When this flag is used with |
int |
DRAG_FLAG_GLOBAL_URI_WRITE
When this flag is used with |
int |
DRAG_FLAG_HIDE_CALLING_TASK_ON_DRAG_START
Flag indicating that this drag will result in the caller activity's task to be hidden for the duration of the drag, which means that the source activity will not receive drag events for the current drag gesture. |
int |
DRAG_FLAG_OPAQUE
Flag indicating that the drag shadow will be opaque. |
int |
DRAG_FLAG_START_INTENT_SENDER_ON_UNHANDLED_DRAG
Flag indicating that an unhandled drag should be delegated to the system to be started if no visible window wishes to handle the drop. |
int |
DRAWING_CACHE_QUALITY_AUTO
This constant was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, |
int |
DRAWING_CACHE_QUALITY_HIGH
This constant was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, |
int |
DRAWING_CACHE_QUALITY_LOW
This constant was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, |
int |
FIND_VIEWS_WITH_CONTENT_DESCRIPTION
Find find views that contain the specified content description. |
int |
FIND_VIEWS_WITH_TEXT
Find views that render the specified text. |
int |
FOCUSABLE
This view wants keystrokes. |
int |
FOCUSABLES_ALL
View flag indicating whether |
int |
FOCUSABLES_TOUCH_MODE
View flag indicating whether |
int |
FOCUSABLE_AUTO
This view determines focusability automatically. |
int |
FOCUS_BACKWARD
Use with |
int |
FOCUS_DOWN
Use with |
int |
FOCUS_FORWARD
Use with |
int |
FOCUS_LEFT
Use with |
int |
FOCUS_RIGHT
Use with |
int |
FOCUS_UP
Use with |
int |
GONE
This view is invisible, and it doesn't take any space for layout purposes. |
int |
HAPTIC_FEEDBACK_ENABLED
View flag indicating whether this view should have haptic feedback enabled for events such as long presses. |
int |
IMPORTANT_FOR_ACCESSIBILITY_AUTO
Automatically determine whether a view is important for accessibility. |
int |
IMPORTANT_FOR_ACCESSIBILITY_NO
The view is not important for accessibility. |
int |
IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS
The view is not important for accessibility, nor are any of its descendant views. |
int |
IMPORTANT_FOR_ACCESSIBILITY_YES
The view is important for accessibility. |
int |
IMPORTANT_FOR_AUTOFILL_AUTO
Automatically determine whether a view is important for autofill. |
int |
IMPORTANT_FOR_AUTOFILL_NO
The view is not important for autofill, but its children (if any) will be traversed. |
int |
IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS
The view is not important for autofill, and its children (if any) will not be traversed. |
int |
IMPORTANT_FOR_AUTOFILL_YES
The view is important for autofill, and its children (if any) will be traversed. |
int |
IMPORTANT_FOR_AUTOFILL_YES_EXCLUDE_DESCENDANTS
The view is important for autofill, but its children (if any) will not be traversed. |
int |
IMPORTANT_FOR_CONTENT_CAPTURE_AUTO
Automatically determine whether a view is important for content capture. |
int |
IMPORTANT_FOR_CONTENT_CAPTURE_NO
The view is not important for content capture, but its children (if any) will be traversed. |
int |
IMPORTANT_FOR_CONTENT_CAPTURE_NO_EXCLUDE_DESCENDANTS
The view is not important for content capture, and its children (if any) will not be traversed. |
int |
IMPORTANT_FOR_CONTENT_CAPTURE_YES
The view is important for content capture, and its children (if any) will be traversed. |
int |
IMPORTANT_FOR_CONTENT_CAPTURE_YES_EXCLUDE_DESCENDANTS
The view is important for content capture, but its children (if any) will not be traversed. |
int |
INVISIBLE
This view is invisible, but it still takes up space for layout purposes. |
int |
KEEP_SCREEN_ON
View flag indicating that the screen should remain on while the window containing this view is visible to the user. |
int |
LAYER_TYPE_HARDWARE
Indicates that the view has a hardware layer. |
int |
LAYER_TYPE_NONE
Indicates that the view does not have a layer. |
int |
LAYER_TYPE_SOFTWARE
Indicates that the view has a software layer. |
int |
LAYOUT_DIRECTION_INHERIT
Horizontal layout direction of this view is inherited from its parent. |
int |
LAYOUT_DIRECTION_LOCALE
Horizontal layout direction of this view is from deduced from the default language script for the locale. |
int |
LAYOUT_DIRECTION_LTR
Horizontal layout direction of this view is from Left to Right. |
int |
LAYOUT_DIRECTION_RTL
Horizontal layout direction of this view is from Right to Left. |
int |
MEASURED_HEIGHT_STATE_SHIFT
Bit shift of |
int |
MEASURED_SIZE_MASK
Bits of |
int |
MEASURED_STATE_MASK
Bits of |
int |
MEASURED_STATE_TOO_SMALL
Bit of |
int |
NOT_FOCUSABLE
This view does not want keystrokes. |
int |
NO_ID
Used to mark a View that has no ID. |
int |
OVER_SCROLL_ALWAYS
Always allow a user to over-scroll this view, provided it is a view that can scroll. |
int |
OVER_SCROLL_IF_CONTENT_SCROLLS
Allow a user to over-scroll this view only if the content is large enough to meaningfully scroll, provided it is a view that can scroll. |
int |
OVER_SCROLL_NEVER
Never allow a user to over-scroll this view. |
float |
REQUESTED_FRAME_RATE_CATEGORY_DEFAULT
|
float |
REQUESTED_FRAME_RATE_CATEGORY_HIGH
|
float |
REQUESTED_FRAME_RATE_CATEGORY_LOW
|
float |
REQUESTED_FRAME_RATE_CATEGORY_NORMAL
|
float |
REQUESTED_FRAME_RATE_CATEGORY_NO_PREFERENCE
|
int |
SCREEN_STATE_OFF
Indicates that the screen has changed state and is now off. |
int |
SCREEN_STATE_ON
Indicates that the screen has changed state and is now on. |
int |
SCROLLBARS_INSIDE_INSET
The scrollbar style to display the scrollbars inside the padded area, increasing the padding of the view. |
int |
SCROLLBARS_INSIDE_OVERLAY
The scrollbar style to display the scrollbars inside the content area, without increasing the padding. |
int |
SCROLLBARS_OUTSIDE_INSET
The scrollbar style to display the scrollbars at the edge of the view, increasing the padding of the view. |
int |
SCROLLBARS_OUTSIDE_OVERLAY
The scrollbar style to display the scrollbars at the edge of the view, without increasing the padding. |
int |
SCROLLBAR_POSITION_DEFAULT
Position the scroll bar at the default position as determined by the system. |
int |
SCROLLBAR_POSITION_LEFT
Position the scroll bar along the left edge. |
int |
SCROLLBAR_POSITION_RIGHT
Position the scroll bar along the right edge. |
int |
SCROLL_AXIS_HORIZONTAL
Indicates scrolling along the horizontal axis. |
int |
SCROLL_AXIS_NONE
Indicates no axis of view scrolling. |
int |
SCROLL_AXIS_VERTICAL
Indicates scrolling along the vertical axis. |
int |
SCROLL_CAPTURE_HINT_AUTO
The content of this view will be considered for scroll capture if scrolling is possible. |
int |
SCROLL_CAPTURE_HINT_EXCLUDE
Explicitly exclude this view as a potential scroll capture target. |
int |
SCROLL_CAPTURE_HINT_EXCLUDE_DESCENDANTS
Explicitly exclude all children of this view as potential scroll capture targets. |
int |
SCROLL_CAPTURE_HINT_INCLUDE
Explicitly include this view as a potential scroll capture target. |
int |
SCROLL_INDICATOR_BOTTOM
Scroll indicator direction for the bottom edge of the view. |
int |
SCROLL_INDICATOR_END
Scroll indicator direction for the ending edge of the view. |
int |
SCROLL_INDICATOR_LEFT
Scroll indicator direction for the left edge of the view. |
int |
SCROLL_INDICATOR_RIGHT
Scroll indicator direction for the right edge of the view. |
int |
SCROLL_INDICATOR_START
Scroll indicator direction for the starting edge of the view. |
int |
SCROLL_INDICATOR_TOP
Scroll indicator direction for the top edge of the view. |
int |
SOUND_EFFECTS_ENABLED
View flag indicating whether this view should have sound effects enabled for events such as clicking and touching. |
int |
STATUS_BAR_HIDDEN
This constant was deprecated
in API level 15.
Use |
int |
STATUS_BAR_VISIBLE
This constant was deprecated
in API level 15.
Use |
int |
SYSTEM_UI_FLAG_FULLSCREEN
This constant was deprecated
in API level 30.
Use |
int |
SYSTEM_UI_FLAG_HIDE_NAVIGATION
This constant was deprecated
in API level 30.
Use |
int |
SYSTEM_UI_FLAG_IMMERSIVE
This constant was deprecated
in API level 30.
Use |
int |
SYSTEM_UI_FLAG_IMMERSIVE_STICKY
This constant was deprecated
in API level 30.
Use |
int |
SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
This constant was deprecated
in API level 30.
For floating windows, use |
int |
SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
This constant was deprecated
in API level 30.
For floating windows, use |
int |
SYSTEM_UI_FLAG_LAYOUT_STABLE
This constant was deprecated
in API level 30.
Use |
int |
SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR
This constant was deprecated
in API level 30.
Use |
int |
SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
This constant was deprecated
in API level 30.
Use |
int |
SYSTEM_UI_FLAG_LOW_PROFILE
This constant was deprecated
in API level 30.
Low profile mode is deprecated. Hide the system bars instead if the application
needs to be in a unobtrusive mode. Use |
int |
SYSTEM_UI_FLAG_VISIBLE
This constant was deprecated
in API level 30.
SystemUiVisibility flags are deprecated. Use |
int |
SYSTEM_UI_LAYOUT_FLAGS
This constant was deprecated in API level 30. System UI layout flags are deprecated. |
int |
TEXT_ALIGNMENT_CENTER
Center the paragraph, e.g. ALIGN_CENTER. |
int |
TEXT_ALIGNMENT_GRAVITY
Default for the root view. |
int |
TEXT_ALIGNMENT_INHERIT
Default text alignment. |
int |
TEXT_ALIGNMENT_TEXT_END
Align to the end of the paragraph, e.g. ALIGN_OPPOSITE. |
int |
TEXT_ALIGNMENT_TEXT_START
Align to the start of the paragraph, e.g. ALIGN_NORMAL. |
int |
TEXT_ALIGNMENT_VIEW_END
Align to the end of the view, which is ALIGN_RIGHT if the view's resolved layoutDirection is LTR, and ALIGN_LEFT otherwise. |
int |
TEXT_ALIGNMENT_VIEW_START
Align to the start of the view, which is ALIGN_LEFT if the view's resolved layoutDirection is LTR, and ALIGN_RIGHT otherwise. |
int |
TEXT_DIRECTION_ANY_RTL
Text direction is using "any-RTL" algorithm. |
int |
TEXT_DIRECTION_FIRST_STRONG
Text direction is using "first strong algorithm". |
int |
TEXT_DIRECTION_FIRST_STRONG_LTR
Text direction is using "first strong algorithm". |
int |
TEXT_DIRECTION_FIRST_STRONG_RTL
Text direction is using "first strong algorithm". |
int |
TEXT_DIRECTION_INHERIT
Text direction is inherited through |
int |
TEXT_DIRECTION_LOCALE
Text direction is coming from the system Locale. |
int |
TEXT_DIRECTION_LTR
Text direction is forced to LTR. |
int |
TEXT_DIRECTION_RTL
Text direction is forced to RTL. |
String |
VIEW_LOG_TAG
The logging tag used by this class with android.util.Log. |
int |
VISIBLE
This view is visible. |
Fields | |
|---|---|
public
static
final
Property<View, Float> |
ALPHA
A Property wrapper around the |
protected
static
final
int[] |
EMPTY_STATE_SET
Indicates the view has no states set. |
protected
static
final
int[] |
ENABLED_FOCUSED_SELECTED_STATE_SET
Indicates the view is enabled, focused and selected. |
protected
static
final
int[] |
ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET
Indicates the view is enabled, focused, selected and its window has the focus. |
protected
static
final
int[] |
ENABLED_FOCUSED_STATE_SET
Indicates the view is enabled and has the focus. |
protected
static
final
int[] |
ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET
Indicates the view is enabled, focused and its window has the focus. |
protected
static
final
int[] |
ENABLED_SELECTED_STATE_SET
Indicates the view is enabled and selected. |
protected
static
final
int[] |
ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET
Indicates the view is enabled, selected and its window has the focus. |
protected
static
final
int[] |
ENABLED_STATE_SET
Indicates the view is enabled. |
protected
static
final
int[] |
ENABLED_WINDOW_FOCUSED_STATE_SET
Indicates the view is enabled and that its window has focus. |
protected
static
final
int[] |
FOCUSED_SELECTED_STATE_SET
Indicates the view is focused and selected. |
protected
static
final
int[] |
FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET
Indicates the view is focused, selected and its window has the focus. |
protected
static
final
int[] |
FOCUSED_STATE_SET
Indicates the view is focused. |
protected
static
final
int[] |
FOCUSED_WINDOW_FOCUSED_STATE_SET
Indicates the view has the focus and that its window has the focus. |
protected
static
final
int[] |
PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET
Indicates the view is pressed, enabled, focused and selected. |
protected
static
final
int[] |
PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET
Indicates the view is pressed, enabled, focused, selected and its window has the focus. |
protected
static
final
int[] |
PRESSED_ENABLED_FOCUSED_STATE_SET
Indicates the view is pressed, enabled and focused. |
protected
static
final
int[] |
PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET
Indicates the view is pressed, enabled, focused and its window has the focus. |
protected
static
final
int[] |
PRESSED_ENABLED_SELECTED_STATE_SET
Indicates the view is pressed, enabled and selected. |
protected
static
final
int[] |
PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET
Indicates the view is pressed, enabled, selected and its window has the focus. |
protected
static
final
int[] |
PRESSED_ENABLED_STATE_SET
Indicates the view is pressed and enabled. |
protected
static
final
int[] |
PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET
Indicates the view is pressed, enabled and its window has the focus. |
protected
static
final
int[] |
PRESSED_FOCUSED_SELECTED_STATE_SET
Indicates the view is pressed, focused and selected. |
protected
static
final
int[] |
PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET
Indicates the view is pressed, focused, selected and its window has the focus. |
protected
static
final
int[] |
PRESSED_FOCUSED_STATE_SET
Indicates the view is pressed and focused. |
protected
static
final
int[] |
PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET
Indicates the view is pressed, focused and its window has the focus. |
protected
static
final
int[] |
PRESSED_SELECTED_STATE_SET
Indicates the view is pressed and selected. |
protected
static
final
int[] |
PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET
Indicates the view is pressed, selected and its window has the focus. |
protected
static
final
int[] |
PRESSED_STATE_SET
Indicates the view is pressed. |
protected
static
final
int[] |
PRESSED_WINDOW_FOCUSED_STATE_SET
Indicates the view is pressed and its window has the focus. |
public
static
final
Property<View, Float> |
ROTATION
A Property wrapper around the |
public
static
final
Property<View, Float> |
ROTATION_X
A Property wrapper around the |
public
static
final
Property<View, Float> |
ROTATION_Y
A Property wrapper around the |
public
static
final
Property<View, Float> |
SCALE_X
A Property wrapper around the |
public
static
final
Property<View, Float> |
SCALE_Y
A Property wrapper around the |
protected
static
final
int[] |
SELECTED_STATE_SET
Indicates the view is selected. |
protected
static
final
int[] |
SELECTED_WINDOW_FOCUSED_STATE_SET
Indicates the view is selected and that its window has the focus. |
public
static
final
Property<View, Float> |
TRANSLATION_X
A Property wrapper around the |
public
static
final
Property<View, Float> |
TRANSLATION_Y
A Property wrapper around the |
public
static
final
Property<View, Float> |
TRANSLATION_Z
A Property wrapper around the |
protected
static
final
int[] |
WINDOW_FOCUSED_STATE_SET
Indicates the view's window has focus. |
public
static
final
Property<View, Float> |
X
A Property wrapper around the |
public
static
final
Property<View, Float> |
Y
A Property wrapper around the |
public
static
final
Property<View, Float> |
Z
A Property wrapper around the |
Public constructors | |
|---|---|
View(Context context)
Simple constructor to use when creating a view from code. |
|
View(Context context, AttributeSet attrs)
Constructor that is called when inflating a view from XML. |
|
View(Context context, AttributeSet attrs, int defStyleAttr)
Perform inflation from XML and apply a class-specific base style from a theme attribute. |
|
View(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)
Perform inflation from XML and apply a class-specific base style from a theme attribute or style resource. |
|
Public methods | |
|---|---|
void
|
addChildrenForAccessibility(ArrayList<View> outChildren)
Adds the children of this View relevant for accessibility to the given list as output. |
void
|
addExtraDataToAccessibilityNodeInfo(AccessibilityNodeInfo info, String extraDataKey, Bundle arguments)
Adds extra data to an |
void
|
addFocusables(ArrayList<View> views, int direction)
Add any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views. |
void
|
addFocusables(ArrayList<View> views, int direction, int focusableMode)
Adds any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views. |
void
|
addKeyboardNavigationClusters(Collection<View> views, int direction)
Adds any keyboard navigation cluster roots that are descendants of this view (possibly including this view if it is a cluster root itself) to views. |
void
|
addOnAttachStateChangeListener(View.OnAttachStateChangeListener listener)
Add a listener for attach state changes. |
void
|
addOnLayoutChangeListener(View.OnLayoutChangeListener listener)
Add a listener that will be called when the bounds of the view change due to layout processing. |
void
|
addOnUnhandledKeyEventListener(View.OnUnhandledKeyEventListener listener)
Adds a listener which will receive unhandled |
void
|
addTouchables(ArrayList<View> views)
Add any touchable views that are descendants of this view (possibly including this view if it is touchable itself) to views. |
ViewPropertyAnimator
|
animate()
This method returns a ViewPropertyAnimator object, which can be used to animate specific properties on this View. |
void
|
announceForAccessibility(CharSequence text)
This method was deprecated in API level 36. Use one of the methods described in the documentation above to semantically describe UI instead of using an announcement, as accessibility services may choose to ignore events dispatched with this method. |
void
|
autofill(AutofillValue value)
Automatically fills the content of this view with the |
void
|
autofill(SparseArray<AutofillValue> values)
Automatically fills the content of the virtual children within this view. |
void
|
bringToFront()
Change the view's z order in the tree, so it's on top of other sibling views. |
void
|
buildDrawingCache(boolean autoScale)
This method was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, |
void
|
buildDrawingCache()
This method was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, |
void
|
buildLayer()
Forces this view's layer to be created and this view to be rendered into its layer. |
boolean
|
callOnClick()
Directly call any attached OnClickListener. |
boolean
|
canResolveLayoutDirection()
Check if layout direction resolution can be done. |
boolean
|
canResolveTextAlignment()
Check if text alignment resolution can be done. |
boolean
|
canResolveTextDirection()
Check if text direction resolution can be done. |
boolean
|
canScrollHorizontally(int direction)
Check if this view can be scrolled horizontally in a certain direction. |
boolean
|
canScrollVertically(int direction)
Check if this view can be scrolled vertically in a certain direction. |
final
void
|
cancelDragAndDrop()
Cancels an ongoing drag and drop operation. |
void
|
cancelLongPress()
Cancels a pending long press. |
final
void
|
cancelPendingInputEvents()
Cancel any deferred high-level input events that were previously posted to the event queue. |
boolean
|
checkInputConnectionProxy(View view)
Called by the |
void
|
clearAnimation()
Cancels any animations for this view. |
void
|
clearFocus()
Called when this view wants to give up focus. |
void
|
clearPendingCredentialRequest()
Clears the request and callback previously set
through |
void
|
clearViewTranslationCallback()
Clear the |
static
int
|
combineMeasuredStates(int curState, int newState)
Merge two states as returned by |
void
|
computeScroll()
Called by a parent to request that a child update its values for mScrollX and mScrollY if necessary. |
WindowInsets
|
computeSystemWindowInsets(WindowInsets in, Rect outLocalInsets)
Compute insets that should be consumed by this view and the ones that should propagate to those under it. |
AccessibilityNodeInfo
|
createAccessibilityNodeInfo()
Returns an |
void
|
createContextMenu(ContextMenu menu)
Show the context menu for this view. |
void
|
destroyDrawingCache()
This method was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, |
WindowInsets
|
dispatchApplyWindowInsets(WindowInsets insets)
Request to apply the given window insets to this view or another view in its subtree. |
boolean
|
dispatchCapturedPointerEvent(MotionEvent event)
Pass a captured pointer event down to the focused view. |
void
|
dispatchConfigurationChanged(Configuration newConfig)
Dispatch a notification about a resource configuration change down the view hierarchy. |
void
|
dispatchCreateViewTranslationRequest(Map<AutofillId, long[]> viewIds, int[] supportedFormats, TranslationCapability capability, List<ViewTranslationRequest> requests)
Dispatch to collect the |
void
|
dispatchDisplayHint(int hint)
Dispatch a hint about whether this view is displayed. |
boolean
|
dispatchDragEvent(DragEvent event)
Detects if this View is enabled and has a drag event listener. |
void
|
dispatchDrawableHotspotChanged(float x, float y)
Dispatches drawableHotspotChanged to all of this View's children. |
void
|
dispatchFinishTemporaryDetach()
Dispatch |
boolean
|
dispatchGenericMotionEvent(MotionEvent event)
Dispatch a generic motion event. |
boolean
|
dispatchKeyEvent(KeyEvent event)
Dispatch a key event to the next view on the focus path. |
boolean
|
dispatchKeyEventPreIme(KeyEvent event)
Dispatch a key event before it is processed by any input method associated with the view hierarchy. |
boolean
|
dispatchKeyShortcutEvent(KeyEvent event)
Dispatches a key shortcut event. |
boolean
|
dispatchNestedFling(float velocityX, float velocityY, boolean consumed)
Dispatch a fling to a nested scrolling parent. |
boolean
|
dispatchNestedPreFling(float velocityX, float velocityY)
Dispatch a fling to a nested scrolling parent before it is processed by this view. |
boolean
|
dispatchNestedPrePerformAccessibilityAction(int action, Bundle arguments)
Report an accessibility action to this view's parents for delegated processing. |
boolean
|
dispatchNestedPreScroll(int dx, int dy, int[] consumed, int[] offsetInWindow)
Dispatch one step of a nested scroll in progress before this view consumes any portion of it. |
boolean
|
dispatchNestedScroll(int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int[] offsetInWindow)
Dispatch one step of a nested scroll in progress. |
void
|
dispatchPointerCaptureChanged(boolean hasCapture)
|
boolean
|
dispatchPopulateAccessibilityEvent(AccessibilityEvent event)
Dispatches an |
void
|
dispatchProvideAutofillStructure(ViewStructure structure, int flags)
Dispatches creation of a |
void
|
dispatchProvideStructure(ViewStructure structure)
Dispatch creation of |
void
|
dispatchScrollCaptureSearch(Rect localVisibleRect, Point windowOffset, Consumer<ScrollCaptureTarget> targets)
Dispatch a scroll capture search request down the view hierarchy. |
void
|
dispatchStartTemporaryDetach()
Dispatch |
void
|
dispatchSystemUiVisibilityChanged(int visibility)
This method was deprecated
in API level 30.
Use |
boolean
|
dispatchTouchEvent(MotionEvent event)
Pass the touch screen motion event down to the target view, or this view if it is the target. |
boolean
|
dispatchTrackballEvent(MotionEvent event)
Pass a trackball motion event down to the focused view. |
boolean
|
dispatchUnhandledMove(View focused, int direction)
This method is the last chance for the focused view and its ancestors to respond to an arrow key. |
void
|
dispatchWindowFocusChanged(boolean hasFocus)
Called when the window containing this view gains or loses window focus. |
void
|
dispatchWindowInsetsAnimationEnd(WindowInsetsAnimation animation)
Dispatches |
void
|
dispatchWindowInsetsAnimationPrepare(WindowInsetsAnimation animation)
Dispatches |
WindowInsets
|
dispatchWindowInsetsAnimationProgress(WindowInsets insets, List<WindowInsetsAnimation> runningAnimations)
Dispatches |
WindowInsetsAnimation.Bounds
|
dispatchWindowInsetsAnimationStart(WindowInsetsAnimation animation, WindowInsetsAnimation.Bounds bounds)
Dispatches |
void
|
dispatchWindowSystemUiVisiblityChanged(int visible)
This method was deprecated
in API level 30.
SystemUiVisibility flags are deprecated. Use |
void
|
dispatchWindowVisibilityChanged(int visibility)
Dispatch a window visibility change down the view hierarchy. |
void
|
draw(Canvas canvas)
Manually render this view (and all of its children) to the given Canvas. |
void
|
drawableHotspotChanged(float x, float y)
This function is called whenever the view hotspot changes and needs to be propagated to drawables or child views managed by the view. |
View
|
findFocus()
Find the view in the hierarchy rooted at this view that currently has focus. |
final
OnBackInvokedDispatcher
|
findOnBackInvokedDispatcher()
Walk up the View hierarchy to find the nearest |
final
<T extends View>
T
|
findViewById(int id)
Finds the first descendant view with the given ID, the view itself if
the ID matches |
final
<T extends View>
T
|
findViewWithTag(Object tag)
Look for a child view with the given tag. |
void
|
findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags)
Finds the Views that contain given text. |
View
|
focusSearch(int direction)
Find the nearest view in the specified direction that can take focus. |
void
|
forceHasOverlappingRendering(boolean hasOverlappingRendering)
Sets the behavior for overlapping rendering for this view (see |
void
|
forceLayout()
Forces this view to be laid out during the next layout pass. |
boolean
|
gatherTransparentRegion(Region region)
This is used by the ViewRoot to perform an optimization when the view hierarchy contains one or several SurfaceView. |
void
|
generateDisplayHash(String hashAlgorithm, Rect bounds, Executor executor, DisplayHashResultCallback callback)
Called to generate a |
static
int
|
generateViewId()
Generate a value suitable for use in |
CharSequence
|
getAccessibilityClassName()
Return the class name of this object to be used for accessibility purposes. |
View.AccessibilityDelegate
|
getAccessibilityDelegate()
Returns the delegate for implementing accessibility support via composition. |
int
|
getAccessibilityLiveRegion()
Gets the live region mode for this View. |
AccessibilityNodeProvider
|
getAccessibilityNodeProvider()
Gets the provider for managing a virtual view hierarchy rooted at this View
and reported to |
CharSequence
|
getAccessibilityPaneTitle()
Get the title of the pane for purposes of accessibility. |
int
|
getAccessibilityTraversalAfter()
Gets the id of a view after which this one is visited in accessibility traversal. |
int
|
getAccessibilityTraversalBefore()
Gets the id of a view before which this one is visited in accessibility traversal. |
String
|
getAllowedHandwritingDelegatePackageName()
Returns the allowed package for delegate editor views for which this view may act as a
handwriting delegator, as set by |
String
|
getAllowedHandwritingDelegatorPackageName()
Returns the allowed package for views which may act as a handwriting delegator for this
delegate editor view, as set by |
float
|
getAlpha()
The opacity of the view. |
Animation
|
getAnimation()
Get the animation currently associated with this view. |
Matrix
|
getAnimationMatrix()
Return the current transformation matrix of the view. |
IBinder
|
getApplicationWindowToken()
Retrieve a unique token identifying the top-level "real" window of the window that this view is attached to. |
int[]
|
getAttributeResolutionStack(int attribute)
Returns the ordered list of resource ID that are considered when resolving attribute values
for this |
Map<Integer, Integer>
|
getAttributeSourceResourceMap()
Returns the mapping of attribute resource ID to source resource ID where the attribute value was set. |
String[]
|
getAutofillHints()
Gets the hints that help an |
final
AutofillId
|
getAutofillId()
Gets the unique, logical identifier of this view in the activity, for autofill purposes. |
int
|
getAutofillType()
Describes the autofill type of this view, so an
|
AutofillValue
|
getAutofillValue()
Gets the |
Drawable
|
getBackground()
Gets the background drawable |
BlendMode
|
getBackgroundTintBlendMode()
Return the blending mode used to apply the tint to the background drawable, if specified. |
ColorStateList
|
getBackgroundTintList()
Return the tint applied to the background drawable, if specified. |
PorterDuff.Mode
|
getBackgroundTintMode()
Return the blending mode used to apply the tint to the background drawable, if specified. |
int
|
getBaseline()
Return the offset of the widget's text baseline from the widget's top boundary. |
final
int
|
getBottom()
Bottom position of this view relative to its parent. |
float
|
getCameraDistance()
Gets the distance along the Z axis from the camera to this view. |
boolean
|
getClipBounds(Rect outRect)
Populates an output rectangle with the clip bounds of the view,
returning |
Rect
|
getClipBounds()
Returns a copy of the current |
final
boolean
|
getClipToOutline()
Returns whether the Outline should be used to clip the contents of the View. |
final
ContentCaptureSession
|
getContentCaptureSession()
Gets the session used to notify content capture events. |
CharSequence
|
getContentDescription()
Returns the |
final
int
|
getContentSensitivity()
Gets content sensitivity mode to determine whether this view displays sensitive content. |
final
Context
|
getContext()
Returns the context the view is running in, through which it can access the current theme, resources, etc. |
final
boolean
|
getDefaultFocusHighlightEnabled()
Returns whether this View should use a default focus highlight when it gets focused but
doesn't have |
static
int
|
getDefaultSize(int size, int measureSpec)
Utility to return a default size. |
Display
|
getDisplay()
Gets the logical display to which the view's window has been attached. |
final
int[]
|
getDrawableState()
Return an array of resource IDs of the drawable states representing the current state of the view. |
Bitmap
|
getDrawingCache()
This method was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, |
Bitmap
|
getDrawingCache(boolean autoScale)
This method was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, |
int
|
getDrawingCacheBackgroundColor()
This method was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, |
int
|
getDrawingCacheQuality()
This method was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, |
void
|
getDrawingRect(Rect outRect)
Return the visible drawing bounds of your view. |
long
|
getDrawingTime()
Return the time at which the drawing of the view hierarchy started. |
float
|
getElevation()
The base elevation of this view relative to its parent, in pixels. |
int
|
getExplicitStyle()
Returns the resource ID for the style specified using |
boolean
|
getFilterTouchesWhenObscured()
Gets whether the framework should discard touches when the view's window is obscured by another visible window at the touched location. |
boolean
|
getFitsSystemWindows()
Check for state of |
int
|
getFocusable()
Returns the focusable setting for this view. |
ArrayList<View>
|
getFocusables(int direction)
Find and return all focusable views that are descendants of this view, possibly including this view if it is focusable itself. |
void
|
getFocusedRect(Rect r)
When a view has focus and the user navigates away from it, the next view is searched for starting from the rectangle filled in by this method. |
Drawable
|
getForeground()
Returns the drawable used as the foreground of this View. |
int
|
getForegroundGravity()
Describes how the foreground is positioned. |
BlendMode
|
getForegroundTintBlendMode()
Return the blending mode used to apply the tint to the foreground drawable, if specified. |
ColorStateList
|
getForegroundTintList()
Return the tint applied to the foreground drawable, if specified. |
PorterDuff.Mode
|
getForegroundTintMode()
Return the blending mode used to apply the tint to the foreground drawable, if specified. |
float
|
getFrameContentVelocity()
Get the current velocity of the View. |
final
boolean
|
getGlobalVisibleRect(Rect r)
Sets |
boolean
|
getGlobalVisibleRect(Rect r, Point globalOffset)
Sets |
Handler
|
getHandler()
|
float
|
getHandwritingBoundsOffsetBottom()
Return the amount of offset applied to the bottom edge of this view's handwriting bounds, in the unit of pixel. |
float
|
getHandwritingBoundsOffsetLeft()
Return the amount of offset applied to the left edge of this view's handwriting bounds, in the unit of pixel. |
float
|
getHandwritingBoundsOffsetRight()
Return the amount of offset applied to the right edge of this view's handwriting bounds, in the unit of pixel. |
float
|
getHandwritingBoundsOffsetTop()
Return the amount of offset applied to the top edge of this view's handwriting bounds, in the unit of pixel. |
int
|
getHandwritingDelegateFlags()
Returns flags configuring the handwriting delegation behavior for this delegate editor view,
as set by |
Runnable
|
getHandwritingDelegatorCallback()
Returns the callback set by |
final
boolean
|
getHasOverlappingRendering()
Returns the value for overlapping rendering that is used internally. |
final
int
|
getHeight()
Return the height of your view. |
void
|
getHitRect(Rect outRect)
Hit rectangle in parent's coordinates |
int
|
getHorizontalFadingEdgeLength()
Returns the size of the horizontal faded edges used to indicate that more content in this view is visible. |
Drawable
|
getHorizontalScrollbarThumbDrawable()
Returns the currently configured Drawable for the thumb of the horizontal scroll bar if it exists, null otherwise. |
Drawable
|
getHorizontalScrollbarTrackDrawable()
Returns the currently configured Drawable for the track of the horizontal scroll bar if it exists, null otherwise. |
int
|
getId()
Returns this view's identifier. |
int
|
getImportantForAccessibility()
Gets the mode for determining whether this View is important for accessibility. |
int
|
getImportantForAutofill()
Gets the mode for determining whether this view is important for autofill. |
int
|
getImportantForContentCapture()
Gets the mode for determining whether this view is important for content capture. |
boolean
|
getKeepScreenOn()
Returns whether the screen should remain on, corresponding to the current
value of |
KeyEvent.DispatcherState
|
getKeyDispatcherState()
Return the global |
int
|
getLabelFor()
Gets the id of a view for which this view serves as a label for accessibility purposes. |
int
|
getLayerType()
Indicates what type of layer is currently associated with this view. |
int
|
getLayoutDirection()
Returns the resolved layout direction for this view. |
ViewGroup.LayoutParams
|
getLayoutParams()
Get the LayoutParams associated with this view. |
final
int
|
getLeft()
Left position of this view relative to its parent. |
final
boolean
|
getLocalVisibleRect(Rect r)
Sets |
void
|
getLocationInSurface(int[] location)
Gets the coordinates of this view in the coordinate space of the
|
void
|
getLocationInWindow(int[] outLocation)
Gets the coordinates of this view in the coordinate space of the window that contains the view, irrespective of system decorations. |
void
|
getLocationOnScreen(int[] outLocation)
Gets the coordinates of this view in the coordinate space of the device screen, irrespective of system decorations and whether the system is in multi-window mode. |
Matrix
|
getMatrix()
The transform matrix of this view, which is calculated based on the current rotation, scale, and pivot properties. |
final
int
|
getMeasuredHeight()
Like |
final
int
|
getMeasuredHeightAndState()
Return the full height measurement information for this view as computed
by the most recent call to |
final
int
|
getMeasuredState()
Return only the state bits of |
final
int
|
getMeasuredWidth()
Like |
final
int
|
getMeasuredWidthAndState()
Return the full width measurement information for this view as computed
by the most recent call to |
int
|
getMinimumHeight()
Returns the minimum height of the view. |
int
|
getMinimumWidth()
Returns the minimum width of the view. |
int
|
getNextClusterForwardId()
Gets the id of the root of the next keyboard navigation cluster. |
int
|
getNextFocusDownId()
Gets the id of the view to use when the next focus is |
int
|
getNextFocusForwardId()
Gets the id of the view to use when the next focus is |
int
|
getNextFocusLeftId()
Gets the id of the view to use when the next focus is |
int
|
getNextFocusRightId()
Gets the id of the view to use when the next focus is |
int
|
getNextFocusUpId()
Gets the id of the view to use when the next focus is |
View.OnFocusChangeListener
|
getOnFocusChangeListener()
Returns the focus-change callback registered for this view. |
int
|
getOutlineAmbientShadowColor()
|
ViewOutlineProvider
|
getOutlineProvider()
Returns the current |
int
|
getOutlineSpotShadowColor()
|
int
|
getOverScrollMode()
Returns the over-scroll mode for this view. |
ViewOverlay
|
getOverlay()
Returns the overlay for this view, creating it if it does not yet exist. |
int
|
getPaddingBottom()
Returns the bottom padding of this view. |
int
|
getPaddingEnd()
Returns the end padding of this view depending on its resolved layout direction. |
int
|
getPaddingLeft()
Returns the left padding of this view. |
int
|
getPaddingRight()
Returns the right padding of this view. |
int
|
getPaddingStart()
Returns the start padding of this view depending on its resolved layout direction. |
int
|
getPaddingTop()
Returns the top padding of this view. |
final
ViewParent
|
getParent()
Gets the parent of this view. |
ViewParent
|
getParentForAccessibility()
Gets the parent for accessibility purposes. |
final
OutcomeReceiver<GetCredentialResponse, GetCredentialException>
|
getPendingCredentialCallback()
Returns the callback that has previously been set up on this view through
the |
final
GetCredentialRequest
|
getPendingCredentialRequest()
Returns the |
float
|
getPivotX()
The x location of the point around which the view is |
float
|
getPivotY()
The y location of the point around which the view is |
PointerIcon
|
getPointerIcon()
Gets the mouse pointer icon for the current view. |
final
List<Rect>
|
getPreferKeepClearRects()
|
String[]
|
getReceiveContentMimeTypes()
Returns the MIME types accepted by |
float
|
getRequestedFrameRate()
Get the current preferred frame rate of the View. |
Resources
|
getResources()
Returns the resources associated with this view. |
final
boolean
|
getRevealOnFocusHint()
Returns this view's preference for reveal behavior when it gains focus. |
final
int
|
getRight()
Right position of this view relative to its parent. |
AttachedSurfaceControl
|
getRootSurfaceControl()
The AttachedSurfaceControl itself is not a View, it is just the interface to the windowing-system object that contains the entire view hierarchy. |
View
|
getRootView()
Finds the topmost view in the current view hierarchy. |
WindowInsets
|
getRootWindowInsets()
Provide original WindowInsets that are dispatched to the view hierarchy. |
float
|
getRotation()
The degrees that the view is rotated around the pivot point. |
float
|
getRotationX()
The degrees that the view is rotated around the horizontal axis through the pivot point. |
float
|
getRotationY()
The degrees that the view is rotated around the vertical axis through the pivot point. |
float
|
getScaleX()
The amount that the view is scaled in x around the pivot point, as a proportion of the view's unscaled width. |
float
|
getScaleY()
The amount that the view is scaled in y around the pivot point, as a proportion of the view's unscaled height. |
int
|
getScrollBarDefaultDelayBeforeFade()
Returns the delay before scrollbars fade. |
int
|
getScrollBarFadeDuration()
Returns the scrollbar fade duration. |
int
|
getScrollBarSize()
Returns the scrollbar size. |
int
|
getScrollBarStyle()
Returns the current scrollbar style. |
int
|
getScrollCaptureHint()
Returns the current scroll capture hint for this view. |
int
|
getScrollIndicators()
Returns a bitmask representing the enabled scroll indicators. |
final
int
|
getScrollX()
Return the scrolled left position of this view. |
final
int
|
getScrollY()
Return the scrolled top position of this view. |
int
|
getSolidColor()
Override this if your view is known to always be drawn on top of a solid color background, and needs to draw fading edges. |
int
|
getSourceLayoutResId()
A |
final
CharSequence
|
getStateDescription()
Returns the |
StateListAnimator
|
getStateListAnimator()
Returns the current StateListAnimator if exists. |
CharSequence
|
getSupplementalDescription()
Returns the |
List<Rect>
|
getSystemGestureExclusionRects()
Retrieve the list of areas within this view's post-layout coordinate space where the system should not intercept touch or other pointing device gestures. |
int
|
getSystemUiVisibility()
This method was deprecated
in API level 30.
SystemUiVisibility flags are deprecated. Use |
Object
|
getTag()
Returns this view's tag. |
Object
|
getTag(int key)
Returns the tag associated with this view and the specified key. |
int
|
getTextAlignment()
Return the resolved text alignment. |
int
|
getTextDirection()
Return the resolved text direction. |
CharSequence
|
getTooltipText()
Returns the view's tooltip text. |
final
int
|
getTop()
Top position of this view relative to its parent. |
TouchDelegate
|
getTouchDelegate()
Gets the TouchDelegate for this View. |
ArrayList<View>
|
getTouchables()
Find and return all touchable views that are descendants of this view, possibly including this view if it is touchable itself. |
float
|
getTransitionAlpha()
This property is intended only for use by the Fade transition, which animates it to produce a visual translucency that does not side-effect (or get affected by) the real alpha property. |
String
|
getTransitionName()
Returns the name of the View to be used to identify Views in Transitions. |
float
|
getTranslationX()
The horizontal location of this view relative to its |
float
|
getTranslationY()
The vertical location of this view relative to its |
float
|
getTranslationZ()
The depth location of this view relative to its |
long
|
getUniqueDrawingId()
Get the identifier used for this view by the drawing system. |
int
|
getVerticalFadingEdgeLength()
Returns the size of the vertical faded edges used to indicate that more content in this view is visible. |
int
|
getVerticalScrollbarPosition()
|
Drawable
|
getVerticalScrollbarThumbDrawable()
Returns the currently configured Drawable for the thumb of the vertical scroll bar if it exists, null otherwise. |
Drawable
|
getVerticalScrollbarTrackDrawable()
Returns the currently configured Drawable for the track of the vertical scroll bar if it exists, null otherwise. |
int
|
getVerticalScrollbarWidth()
Returns the width of the vertical scrollbar. |
ViewTranslationResponse
|
getViewTranslationResponse()
Returns the |
ViewTreeObserver
|
getViewTreeObserver()
Returns the ViewTreeObserver for this view's hierarchy. |
int
|
getVisibility()
Returns the visibility status for this view. |
final
int
|
getWidth()
Return the width of your view. |
WindowId
|
getWindowId()
Retrieve the |
WindowInsetsController
|
getWindowInsetsController()
Retrieves the single |
int
|
getWindowSystemUiVisibility()
This method was deprecated
in API level 30.
SystemUiVisibility flags are deprecated. Use |
IBinder
|
getWindowToken()
Retrieve a unique token identifying the window this view is attached to. |
int
|
getWindowVisibility()
Returns the current visibility of the window this view is attached to
(either |
void
|
getWindowVisibleDisplayFrame(Rect outRect)
Retrieve the overall visible display size in which the window this view is attached to has been positioned in. |
float
|
getX()
The visual x position of this view, in pixels. |
float
|
getY()
The visual y position of this view, in pixels. |
float
|
getZ()
The visual z position of this view, in pixels. |
boolean
|
hasExplicitFocusable()
Returns true if this view is focusable or if it contains a reachable View
for which |
boolean
|
hasFocus()
Returns true if this view has focus itself, or is the ancestor of the view that has focus. |
boolean
|
hasFocusable()
Returns true if this view is focusable or if it contains a reachable View
for which |
boolean
|
hasNestedScrollingParent()
Returns true if this view has a nested scrolling parent. |
boolean
|
hasOnClickListeners()
Return whether this view has an attached OnClickListener. |
boolean
|
hasOnLongClickListeners()
Return whether this view has an attached OnLongClickListener. |
boolean
|
hasOverlappingRendering()
Returns whether this View has content which overlaps. |
boolean
|
hasPointerCapture()
Checks pointer capture status. |
boolean
|
hasTransientState()
Indicates whether the view is currently tracking transient state that the app should not need to concern itself with saving and restoring, but that the framework should take special note to preserve when possible. |
boolean
|
hasWindowFocus()
Returns true if this view is in a window that currently has window focus. |
static
View
|
inflate(Context context, int resource, ViewGroup root)
Inflate a view from an XML resource. |
void
|
invalidate()
Invalidate the whole view. |
void
|
invalidate(Rect dirty)
This method was deprecated
in API level 28.
The switch to hardware accelerated rendering in API 14 reduced
the importance of the dirty rectangle. In API 21 the given rectangle is
ignored entirely in favor of an internally-calculated area instead.
Because of this, clients are encouraged to just call |
void
|
invalidate(int l, int t, int r, int b)
This method was deprecated
in API level 28.
The switch to hardware accelerated rendering in API 14 reduced
the importance of the dirty rectangle. In API 21 the given rectangle is
ignored entirely in favor of an internally-calculated area instead.
Because of this, clients are encouraged to just call |
void
|
invalidateDrawable(Drawable drawable)
Invalidates the specified Drawable. |
void
|
invalidateOutline()
Called to rebuild this View's Outline from its |
boolean
|
isAccessibilityDataSensitive()
Whether this view should restrict accessibility service access only to services that have the
|
boolean
|
isAccessibilityFocused()
Returns whether this View is accessibility focused. |
boolean
|
isAccessibilityHeading()
Gets whether this view is a heading for accessibility purposes. |
boolean
|
isActivated()
Indicates the activation state of this view. |
boolean
|
isAttachedToWindow()
Returns true if this view is currently attached to a window. |
boolean
|
isAutoHandwritingEnabled()
Return whether the View allows automatic handwriting initiation. |
boolean
|
isClickable()
Indicates whether this view reacts to click events or not. |
final
boolean
|
isContentSensitive()
Returns whether this view displays sensitive content, based
on the value explicitly set by |
boolean
|
isContextClickable()
Indicates whether this view reacts to context clicks or not. |
boolean
|
isCredential()
Gets the mode for determining whether this view is a credential. |
boolean
|
isDirty()
True if this view has changed since the last time being drawn. |
boolean
|
isDrawingCacheEnabled()
This method was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, |
boolean
|
isDuplicateParentStateEnabled()
Indicates whether this duplicates its drawable state from its parent. |
boolean
|
isEnabled()
Returns the enabled status for this view. |
final
boolean
|
isFocusable()
Returns whether this View is currently able to take focus. |
final
boolean
|
isFocusableInTouchMode()
When a view is focusable, it may not want to take focus when in touch mode. |
boolean
|
isFocused()
Returns true if this view has focus |
final
boolean
|
isFocusedByDefault()
Returns whether this View should receive focus when the focus is restored for the view hierarchy containing this view. |
boolean
|
isForceDarkAllowed()
|
boolean
|
isHandwritingDelegate()
Returns whether this view has been set as a handwriting delegate by |
boolean
|
isHapticFeedbackEnabled()
|
boolean
|
isHardwareAccelerated()
Indicates whether this view is attached to a hardware accelerated window or not. |
boolean
|
isHorizontalFadingEdgeEnabled()
Indicate whether the horizontal edges are faded when the view is scrolled horizontally. |
boolean
|
isHorizontalScrollBarEnabled()
Indicate whether the horizontal scrollbar should be drawn or not. |
boolean
|
isHovered()
Returns true if the view is currently hovered. |
boolean
|
isImportantForAccessibility()
Computes whether this view should be exposed for accessibility. |
final
boolean
|
isImportantForAutofill()
Hints the Android System whether the |
final
boolean
|
isImportantForContentCapture()
Hints the Android System whether this view is considered important for content capture, based
on the value explicitly set by |
boolean
|
isInEditMode()
Indicates whether this View is currently in edit mode. |
boolean
|
isInLayout()
Returns whether the view hierarchy is currently undergoing a layout pass. |
boolean
|
isInTouchMode()
Returns the touch mode state associated with this view. |
final
boolean
|
isKeyboardNavigationCluster()
Returns whether this View is a root of a keyboard navigation cluster. |
boolean
|
isLaidOut()
Returns true if this view has been through at least one layout since it was last attached to or detached from a window. |
boolean
|
isLayoutDirectionResolved()
|
boolean
|
isLayoutRequested()
Indicates whether or not this view's layout will be requested during the next hierarchy layout pass. |
boolean
|
isLongClickable()
Indicates whether this view reacts to long click events or not. |
boolean
|
isNestedScrollingEnabled()
Returns true if nested scrolling is enabled for this view. |
boolean
|
isOpaque()
Indicates whether this View is opaque. |
boolean
|
isPaddingRelative()
Return if the padding has been set through relative values
|
boolean
|
isPivotSet()
Returns whether or not a pivot has been set by a call to |
final
boolean
|
isPreferKeepClear()
Retrieve the preference for this view to be kept clear. |
boolean
|
isPressed()
Indicates whether the view is currently in pressed state. |
boolean
|
isSaveEnabled()
Indicates whether this view will save its state (that is,
whether its |
boolean
|
isSaveFromParentEnabled()
Indicates whether the entire hierarchy under this view will save its state when a state saving traversal occurs from its parent. |
boolean
|
isScreenReaderFocusable()
Returns whether the view should be treated as a focusable unit by screen reader accessibility tools. |
boolean
|
isScrollContainer()
Indicates whether this view is one of the set of scrollable containers in its window. |
boolean
|
isScrollbarFadingEnabled()
Returns true if scrollbars will fade when this view is not scrolling |
boolean
|
isSelected()
Indicates the selection state of this view. |
final
boolean
|
isShowingLayoutBounds()
Returns |
boolean
|
isShown()
Returns the visibility of this view and all of its ancestors |
boolean
|
isSoundEffectsEnabled()
|
final
boolean
|
isTemporarilyDetached()
Tells whether the |
boolean
|
isTextAlignmentResolved()
|
boolean
|
isTextDirectionResolved()
|
boolean
|
isVerticalFadingEdgeEnabled()
Indicate whether the vertical edges are faded when the view is scrolled horizontally. |
boolean
|
isVerticalScrollBarEnabled()
Indicate whether the vertical scrollbar should be drawn or not. |
boolean
|
isVisibleToUserForAutofill(int virtualId)
Computes whether this virtual autofill view is visible to the user. |
void
|
jumpDrawablesToCurrentState()
Call |
View
|
keyboardNavigationClusterSearch(View currentCluster, int direction)
Find the nearest keyboard navigation cluster in the specified direction. |
void
|
layout(int l, int t, int r, int b)
Assign a size and position to a view and all of its descendants This is the second phase of the layout mechanism. |
final
void
|
measure(int widthMeasureSpec, int heightMeasureSpec)
This is called to find out how big a view should be. |
void
|
offsetLeftAndRight(int offset)
Offset this view's horizontal location by the specified amount of pixels. |
void
|
offsetTopAndBottom(int offset)
Offset this view's vertical location by the specified number of pixels. |
WindowInsets
|
onApplyWindowInsets(WindowInsets insets)
Called when the view should apply |
void
|
onCancelPendingInputEvents()
Called as the result of a call to |
boolean
|
onCapturedPointerEvent(MotionEvent event)
Implement this method to handle captured pointer events |
boolean
|
onCheckIsTextEditor()
Check whether the called view is a text editor, in which case it would make sense to automatically display a soft input window for it. |
InputConnection
|
onCreateInputConnection(EditorInfo outAttrs)
Create a new InputConnection for an InputMethod to interact with the view. |
void
|
onCreateViewTranslationRequest(int[] supportedFormats, Consumer<ViewTranslationRequest> requestsCollector)
Collects a |
void
|
onCreateVirtualViewTranslationRequests(long[] virtualIds, int[] supportedFormats, Consumer<ViewTranslationRequest> requestsCollector)
Collects |
boolean
|
onDragEvent(DragEvent event)
Handles drag events sent by the system following a call to
|
void
|
onDrawForeground(Canvas canvas)
Draw any foreground content for this view. |
boolean
|
onFilterTouchEventForSecurity(MotionEvent event)
Filter the touch event to apply security policies. |
void
|
onFinishTemporaryDetach()
Called after |
boolean
|
onGenericMotionEvent(MotionEvent event)
Implement this method to handle generic motion events. |
void
|
onHoverChanged(boolean hovered)
Implement this method to handle hover state changes. |
boolean
|
onHoverEvent(MotionEvent event)
Implement this method to handle hover events. |
void
|
onInitializeAccessibilityEvent(AccessibilityEvent event)
Initializes an |
void
|
onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info)
Initializes an |
boolean
|
onKeyDown(int keyCode, KeyEvent event)
Default implementation of |
boolean
|
onKeyLongPress(int keyCode, KeyEvent event)
Default implementation of |
boolean
|
onKeyMultiple(int keyCode, int repeatCount, KeyEvent event)
Default implementation of |
boolean
|
onKeyPreIme(int keyCode, KeyEvent event)
Handle a key event before it is processed by any input method associated with the view hierarchy. |
boolean
|
onKeyShortcut(int keyCode, KeyEvent event)
Called on the focused view when a key shortcut event is not handled. |
boolean
|
onKeyUp(int keyCode, KeyEvent event)
Default implementation of |
void
|
onPointerCaptureChange(boolean hasCapture)
Called when the window has just acquired or lost pointer capture. |
void
|
onPopulateAccessibilityEvent(AccessibilityEvent event)
Called from |
void
|
onProvideAutofillStructure(ViewStructure structure, int flags)
Populates a |
void
|
onProvideAutofillVirtualStructure(ViewStructure structure, int flags)
Populates a |
void
|
onProvideContentCaptureStructure(ViewStructure structure, int flags)
Populates a |
void
|
onProvideStructure(ViewStructure structure)
Called when assist structure is being retrieved from a view as part of
|
void
|
onProvideVirtualStructure(ViewStructure structure)
Called when assist structure is being retrieved from a view as part of
|
ContentInfo
|
onReceiveContent(ContentInfo payload)
Implements the default behavior for receiving content for this type of view. |
PointerIcon
|
onResolvePointerIcon(MotionEvent event, int pointerIndex)
Resolve the pointer icon that should be used for specified pointer in the motion event. |
void
|
onRtlPropertiesChanged(int layoutDirection)
Called when any RTL property (layout direction or text direction or text alignment) has been changed. |
void
|
onScreenStateChanged(int screenState)
This method is called whenever the state of the screen this view is attached to changes. |
void
|
onScrollCaptureSearch(Rect localVisibleRect, Point windowOffset, Consumer<ScrollCaptureTarget> targets)
Called when scroll capture is requested, to search for appropriate content to scroll. |
void
|
onStartTemporaryDetach()
This is called when a container is going to temporarily detach a child, with
|
boolean
|
onTouchEvent(MotionEvent event)
Implement this method to handle pointer events. |
boolean
|
onTrackballEvent(MotionEvent event)
Implement this method to handle trackball motion events. |
void
|
onViewTranslationResponse(ViewTranslationResponse response)
Called when the content from |
void
|
onVirtualViewTranslationResponses(LongSparseArray<ViewTranslationResponse> response)
Called when the content from |
void
|
onVisibilityAggregated(boolean isVisible)
Called when the user-visibility of this View is potentially affected by a change to this view itself, an ancestor view or the window this view is attached to. |
void
|
onWindowFocusChanged(boolean hasWindowFocus)
Called when the window containing this view gains or loses focus. |
void
|
onWindowSystemUiVisibilityChanged(int visible)
This method was deprecated
in API level 30.
SystemUiVisibility flags are deprecated. Use |
boolean
|
performAccessibilityAction(int action, Bundle arguments)
Performs the specified accessibility action on the view. |
boolean
|
performClick()
Call this view's OnClickListener, if it is defined. |
boolean
|
performContextClick(float x, float y)
Call this view's OnContextClickListener, if it is defined. |
boolean
|
performContextClick()
Call this view's OnContextClickListener, if it is defined. |
boolean
|
performHapticFeedback(int feedbackConstant)
BZZZTT!!1! Provide haptic feedback to the user for this view. |
boolean
|
performHapticFeedback(int feedbackConstant, int flags)
BZZZTT!!1! Like |
boolean
|
performLongClick(float x, float y)
Calls this view's OnLongClickListener, if it is defined. |
boolean
|
performLongClick()
Calls this view's OnLongClickListener, if it is defined. |
ContentInfo
|
performReceiveContent(ContentInfo payload)
Receives the given content. |
void
|
playSoundEffect(int soundConstant)
Play a sound effect for this view. |
boolean
|
post(Runnable action)
Causes the Runnable to be added to the message queue. |
boolean
|
postDelayed(Runnable action, long delayMillis)
Causes the Runnable to be added to the message queue, to be run after the specified amount of time elapses. |
void
|
postInvalidate()
Cause an invalidate to happen on a subsequent cycle through the event loop. |
void
|
postInvalidate(int left, int top, int right, int bottom)
Cause an invalidate of the specified area to happen on a subsequent cycle through the event loop. |
void
|
postInvalidateDelayed(long delayMilliseconds, int left, int top, int right, int bottom)
Cause an invalidate of the specified area to happen on a subsequent cycle through the event loop. |
void
|
postInvalidateDelayed(long delayMilliseconds)
Cause an invalidate to happen on a subsequent cycle through the event loop. |
void
|
postInvalidateOnAnimation(int left, int top, int right, int bottom)
Cause an invalidate of the specified area to happen on the next animation time step, typically the next display frame. |
void
|
postInvalidateOnAnimation()
Cause an invalidate to happen on the next animation time step, typically the next display frame. |
void
|
postOnAnimation(Runnable action)
Causes the Runnable to execute on the next animation time step. |
void
|
postOnAnimationDelayed(Runnable action, long delayMillis)
Causes the Runnable to execute on the next animation time step, after the specified amount of time elapses. |
void
|
refreshDrawableState()
Call this to force a view to update its drawable state. |
void
|
releasePointerCapture()
Releases the pointer capture. |
boolean
|
removeCallbacks(Runnable action)
Removes the specified Runnable from the message queue. |
void
|
removeOnAttachStateChangeListener(View.OnAttachStateChangeListener listener)
Remove a listener for attach state changes. |
void
|
removeOnLayoutChangeListener(View.OnLayoutChangeListener listener)
Remove a listener for layout changes. |
void
|
removeOnUnhandledKeyEventListener(View.OnUnhandledKeyEventListener listener)
Removes a listener which will receive unhandled |
void
|
reportAppJankStats(AppJankStats appJankStats)
Called from apps when they want to report jank stats to the system. |
void
|
requestApplyInsets()
Ask that a new dispatch of |
void
|
requestFitSystemWindows()
This method was deprecated
in API level 20.
Use |
final
boolean
|
requestFocus(int direction)
Call this to try to give focus to a specific view or to one of its descendants and give it a hint about what direction focus is heading. |
final
boolean
|
requestFocus()
Call this to try to give focus to a specific view or to one of its descendants. |
boolean
|
requestFocus(int direction, Rect previouslyFocusedRect)
Call this to try to give focus to a specific view or to one of its descendants and give it hints about the direction and a specific rectangle that the focus is coming from. |
final
boolean
|
requestFocusFromTouch()
Call this to try to give focus to a specific view or to one of its descendants. |
void
|
requestLayout()
Call this when something has changed which has invalidated the layout of this view. |
void
|
requestPointerCapture()
Requests pointer capture mode. |
boolean
|
requestRectangleOnScreen(Rect rectangle)
Request that a rectangle of this view be visible on the screen, scrolling if necessary just enough. |
boolean
|
requestRectangleOnScreen(Rect rectangle, boolean immediate)
Request that a rectangle of this view be visible on the screen, scrolling if necessary just enough. |
final
void
|
requestUnbufferedDispatch(int source)
Request unbuffered dispatch of the given event source class to this view. |
final
void
|
requestUnbufferedDispatch(MotionEvent event)
Request unbuffered dispatch of the given stream of MotionEvents to this View. |
final
<T extends View>
T
|
requireViewById(int id)
Finds the first descendant view with the given ID, the view itself if the ID matches
|
void
|
resetPivot()
Clears any pivot previously set by a call to |
static
int
|
resolveSize(int size, int measureSpec)
Version of |
static
int
|
resolveSizeAndState(int size, int measureSpec, int childMeasuredState)
Utility to reconcile a desired size and state, with constraints imposed by a MeasureSpec. |
boolean
|
restoreDefaultFocus()
Gives focus to the default-focus view in the view hierarchy that has this view as a root. |
void
|
restoreHierarchyState(SparseArray<Parcelable> container)
Restore this view hierarchy's frozen state from the given container. |
final
void
|
saveAttributeDataForStyleable(Context context, int[] styleable, AttributeSet attrs, TypedArray t, int defStyleAttr, int defStyleRes)
Stores debugging information about attributes. |
void
|
saveHierarchyState(SparseArray<Parcelable> container)
Store this view hierarchy's frozen state into the given container. |
void
|
scheduleDrawable(Drawable who, Runnable what, long when)
Schedules an action on a drawable to occur at a specified time. |
void
|
scrollBy(int x, int y)
Move the scrolled position of your view. |
void
|
scrollTo(int x, int y)
Set the scrolled position of your view. |
void
|
sendAccessibilityEvent(int eventType)
Sends an accessibility event of the given type. |
void
|
sendAccessibilityEventUnchecked(AccessibilityEvent event)
This method behaves exactly as |
void
|
setAccessibilityDataSensitive(int accessibilityDataSensitive)
Specifies whether this view should only allow interactions from
|
void
|
setAccessibilityDelegate(View.AccessibilityDelegate delegate)
Sets a delegate for implementing accessibility support via composition (as opposed to inheritance). |
void
|
setAccessibilityHeading(boolean isHeading)
Set if view is a heading for a section of content for accessibility purposes. |
void
|
setAccessibilityLiveRegion(int mode)
Sets the live region mode for this view. |
void
|
setAccessibilityPaneTitle(CharSequence accessibilityPaneTitle)
Visually distinct portion of a window with window-like semantics are considered panes for accessibility purposes. |
void
|
setAccessibilityTraversalAfter(int afterId)
Sets the id of a view that screen readers are requested to visit before this view. |
void
|
setAccessibilityTraversalBefore(int beforeId)
Sets the id of a view that screen readers are requested to visit after this view. |
void
|
setActivated(boolean activated)
Changes the activated state of this view. |
void
|
setAllowClickWhenDisabled(boolean clickableWhenDisabled)
Enables or disables click events for this view when disabled. |
void
|
setAllowedHandwritingDelegatePackage(String allowedPackageName)
Specifies that this view may act as a handwriting initiation delegator for a delegate editor view from the specified package. |
void
|
setAllowedHandwritingDelegatorPackage(String allowedPackageName)
Specifies that a view from the specified package may act as a handwriting delegator for this delegate editor view. |
void
|
setAlpha(float alpha)
Sets the opacity of the view to a value from 0 to 1, where 0 means the view is completely transparent and 1 means the view is completely opaque. |
void
|
setAnimation(Animation animation)
Sets the next animation to play for this view. |
void
|
setAnimationMatrix(Matrix matrix)
Changes the transformation matrix on the view. |
void
|
setAutoHandwritingEnabled(boolean enabled)
Set whether this view enables automatic handwriting initiation. |
void
|
setAutofillHints(String... autofillHints)
Sets the hints that help an |
void
|
setAutofillId(AutofillId id)
Sets the unique, logical identifier of this view in the activity, for autofill purposes. |
void
|
setBackground(Drawable background)
Set the background to a given Drawable, or remove the background. |
void
|
setBackgroundColor(int color)
Sets the background color for this view. |
void
|
setBackgroundDrawable(Drawable background)
This method was deprecated
in API level 16.
use |
void
|
setBackgroundResource(int resid)
Set the background to a given resource. |
void
|
setBackgroundTintBlendMode(BlendMode blendMode)
Specifies the blending mode used to apply the tint specified by
|
void
|
setBackgroundTintList(ColorStateList tint)
Applies a tint to the background drawable. |
void
|
setBackgroundTintMode(PorterDuff.Mode tintMode)
Specifies the blending mode used to apply the tint specified by
|
final
void
|
setBottom(int bottom)
Sets the bottom position of this view relative to its parent. |
void
|
setCameraDistance(float distance)
Sets the distance along the Z axis (orthogonal to the X/Y plane on which views are drawn) from the camera to this view. |
void
|
setClickable(boolean clickable)
Enables or disables click events for this view. |
void
|
setClipBounds(Rect clipBounds)
Sets a rectangular area on this view to which the view will be clipped when it is drawn. |
void
|
setClipToOutline(boolean clipToOutline)
Sets whether the View's Outline should be used to clip the contents of the View. |
void
|
setContentCaptureSession(ContentCaptureSession contentCaptureSession)
Sets the (optional) |
void
|
setContentDescription(CharSequence contentDescription)
Sets the |
final
void
|
setContentSensitivity(int mode)
Sets content sensitivity mode to determine whether this view displays sensitive content (e.g. username, password etc.). |
void
|
setContextClickable(boolean contextClickable)
Enables or disables context clicking for this view. |
void
|
setDefaultFocusHighlightEnabled(boolean defaultFocusHighlightEnabled)
Sets whether this View should use a default focus highlight when it gets focused but doesn't
have |
void
|
setDrawingCacheBackgroundColor(int color)
This method was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, |
void
|
setDrawingCacheEnabled(boolean enabled)
This method was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, |
void
|
setDrawingCacheQuality(int quality)
This method was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, |
void
|
setDuplicateParentStateEnabled(boolean enabled)
Enables or disables the duplication of the parent's state into this view. |
void
|
setElevation(float elevation)
Sets the base elevation of this view, in pixels. |
void
|
setEnabled(boolean enabled)
Set the enabled state of this view. |
void
|
setFadingEdgeLength(int length)
Set the size of the faded edge used to indicate that more content in this view is available. |
void
|
setFilterTouchesWhenObscured(boolean enabled)
Sets whether the framework should discard touches when the view's window is obscured by another visible window at the touched location. |
void
|
setFitsSystemWindows(boolean fitSystemWindows)
Sets whether or not this view should account for system screen decorations
such as the status bar and inset its content; that is, controlling whether
the default implementation of |
void
|
setFocusable(boolean focusable)
Set whether this view can receive the focus. |
void
|
setFocusable(int focusable)
Sets whether this view can receive focus. |
void
|
setFocusableInTouchMode(boolean focusableInTouchMode)
Set whether this view can receive focus while in touch mode. |
void
|
setFocusedByDefault(boolean isFocusedByDefault)
Sets whether this View should receive focus when the focus is restored for the view hierarchy containing this view. |
void
|
setForceDarkAllowed(boolean allow)
Sets whether or not to allow force dark to apply to this view. |
void
|
setForeground(Drawable foreground)
Supply a Drawable that is to be rendered on top of all of the content in the view. |
void
|
setForegroundGravity(int gravity)
Describes how the foreground is positioned. |
void
|
setForegroundTintBlendMode(BlendMode blendMode)
Specifies the blending mode used to apply the tint specified by
|
void
|
setForegroundTintList(ColorStateList tint)
Applies a tint to the foreground drawable. |
void
|
setForegroundTintMode(PorterDuff.Mode tintMode)
Specifies the blending mode used to apply the tint specified by
|
void
|
setFrameContentVelocity(float pixelsPerSecond)
Set the current velocity of the View, we only track positive value. |
void
|
setHandwritingBoundsOffsets(float offsetLeft, float offsetTop, float offsetRight, float offsetBottom)
Set the amount of offset applied to this view's stylus handwriting bounds. |
void
|
setHandwritingDelegateFlags(int flags)
Sets flags configuring the handwriting delegation behavior for this delegate editor view. |
void
|
setHandwritingDelegatorCallback(Runnable callback)
Sets a callback which should be called when a stylus |
void
|
setHapticFeedbackEnabled(boolean hapticFeedbackEnabled)
Set whether this view should have haptic feedback for events such as long presses. |
void
|
setHasTransientState(boolean hasTransientState)
Set whether this view is currently tracking transient state that the framework should attempt to preserve when possible. |
void
|
setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled)
Define whether the horizontal edges should be faded when this view is scrolled horizontally. |
void
|
setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled)
Define whether the horizontal scrollbar should be drawn or not. |
void
|
setHorizontalScrollbarThumbDrawable(Drawable drawable)
Defines the horizontal thumb drawable |
void
|
setHorizontalScrollbarTrackDrawable(Drawable drawable)
Defines the horizontal track drawable |
void
|
setHovered(boolean hovered)
Sets whether the view is currently hovered. |
void
|
setId(int id)
Sets the identifier for this view. |
void
|
setImportantForAccessibility(int mode)
Sets how to determine whether this view is important for accessibility which is if it fires accessibility events and if it is reported to accessibility services that query the screen. |
void
|
setImportantForAutofill(int mode)
Sets the mode for determining whether this view is considered important for autofill. |
void
|
setImportantForContentCapture(int mode)
Sets the mode for determining whether this view is considered important for content capture. |
void
|
setIsCredential(boolean isCredential)
Sets whether this view is a credential for Credential Manager purposes. |
void
|
setIsHandwritingDelegate(boolean isHandwritingDelegate)
Sets this view to be a handwriting delegate. |
void
|
setKeepScreenOn(boolean keepScreenOn)
Controls whether the screen should remain on, modifying the
value of |
void
|
setKeyboardNavigationCluster(boolean isCluster)
Set whether this view is a root of a keyboard navigation cluster. |
void
|
setLabelFor(int id)
Sets the id of a view for which this view serves as a label for accessibility purposes. |
void
|
setLayerPaint(Paint paint)
Updates the |
void
|
setLayerType(int layerType, Paint paint)
Specifies the type of layer backing this view. |
void
|
setLayoutDirection(int layoutDirection)
Set the layout direction for this view. |
void
|
setLayoutParams(ViewGroup.LayoutParams params)
Set the layout parameters associated with this view. |
final
void
|
setLeft(int left)
Sets the left position of this view relative to its parent. |
final
void
|
setLeftTopRightBottom(int left, int top, int right, int bottom)
Assign a size and position to this view. |
void
|
setLongClickable(boolean longClickable)
Enables or disables long click events for this view. |
void
|
setMinimumHeight(int minHeight)
Sets the minimum height of the view. |
void
|
setMinimumWidth(int minWidth)
Sets the minimum width of the view. |
void
|
setNestedScrollingEnabled(boolean enabled)
Enable or disable nested scrolling for this view. |
void
|
setNextClusterForwardId(int nextClusterForwardId)
Sets the id of the view to use as the root of the next keyboard navigation cluster. |
void
|
setNextFocusDownId(int nextFocusDownId)
Sets the id of the view to use when the next focus is |
void
|
setNextFocusForwardId(int nextFocusForwardId)
Sets the id of the view to use when the next focus is |
void
|
setNextFocusLeftId(int nextFocusLeftId)
Sets the id of the view to use when the next focus is |
void
|
setNextFocusRightId(int nextFocusRightId)
Sets the id of the view to use when the next focus is |
void
|
setNextFocusUpId(int nextFocusUpId)
Sets the id of the view to use when the next focus is |
void
|
setOnApplyWindowInsetsListener(View.OnApplyWindowInsetsListener listener)
Set an |
void
|
setOnCapturedPointerListener(View.OnCapturedPointerListener l)
Set a listener to receive callbacks when the pointer capture state of a view changes. |
void
|
setOnClickListener(View.OnClickListener l)
Register a callback to be invoked when this view is clicked. |
void
|
setOnContextClickListener(View.OnContextClickListener l)
Register a callback to be invoked when this view is context clicked. |
void
|
setOnCreateContextMenuListener(View.OnCreateContextMenuListener l)
Register a callback to be invoked when the context menu for this view is being built. |
void
|
setOnDragListener(View.OnDragListener l)
Register a drag event listener callback object for this View. |
void
|
setOnFocusChangeListener(View.OnFocusChangeListener l)
Register a callback to be invoked when focus of this view changed. |
void
|
setOnGenericMotionListener(View.OnGenericMotionListener l)
Register a callback to be invoked when a generic motion event is sent to this view. |
void
|
setOnHoverListener(View.OnHoverListener l)
Register a callback to be invoked when a hover event is sent to this view. |
void
|
setOnKeyListener(View.OnKeyListener l)
Register a callback to be invoked when a hardware key is pressed in this view. |
void
|
setOnLongClickListener(View.OnLongClickListener l)
Register a callback to be invoked when this view is clicked and held. |
void
|
setOnReceiveContentListener(String[] mimeTypes, OnReceiveContentListener listener)
Sets the listener to be |
void
|
setOnScrollChangeListener(View.OnScrollChangeListener l)
Register a callback to be invoked when the scroll X or Y positions of this view change. |
void
|
setOnSystemUiVisibilityChangeListener(View.OnSystemUiVisibilityChangeListener l)
This method was deprecated
in API level 30.
Use |
void
|
setOnTouchListener(View.OnTouchListener l)
Register a callback to be invoked when a touch event is sent to this view. |
void
|
setOutlineAmbientShadowColor(int color)
Sets the color of the ambient shadow that is drawn when the view has a positive Z or elevation value. |
void
|
setOutlineProvider(ViewOutlineProvider provider)
Sets the |
void
|
setOutlineSpotShadowColor(int color)
Sets the color of the spot shadow that is drawn when the view has a positive Z or elevation value. |
void
|
setOverScrollMode(int overScrollMode)
Set the over-scroll mode for this view. |
void
|
setPadding(int left, int top, int right, int bottom)
Sets the padding. |
void
|
setPaddingRelative(int start, int top, int end, int bottom)
Sets the relative padding. |
void
|
setPendingCredentialRequest(GetCredentialRequest request, OutcomeReceiver<GetCredentialResponse, GetCredentialException> callback)
Sets a |
void
|
setPivotX(float pivotX)
Sets the x location of the point around which the view is
|
void
|
setPivotY(float pivotY)
Sets the y location of the point around which the view is |
void
|
setPointerIcon(PointerIcon pointerIcon)
Set the pointer icon to be used for a mouse pointer in the current view. |
final
void
|
setPreferKeepClear(boolean preferKeepClear)
Set a preference to keep the bounds of this view clear from floating windows above this view's window. |
final
void
|
setPreferKeepClearRects(List<Rect> rects)
Set a preference to keep the provided rects clear from floating windows above this view's window. |
void
|
setPressed(boolean pressed)
Sets the pressed state for this view. |
void
|
setRenderEffect(RenderEffect renderEffect)
Configure the |
void
|
setRequestedFrameRate(float frameRate)
You can set the preferred frame rate for a View using a positive number or by specifying the preferred frame rate category using constants, including REQUESTED_FRAME_RATE_CATEGORY_NO_PREFERENCE, REQUESTED_FRAME_RATE_CATEGORY_LOW, REQUESTED_FRAME_RATE_CATEGORY_NORMAL, REQUESTED_FRAME_RATE_CATEGORY_HIGH. |
final
void
|
setRevealOnFocusHint(boolean revealOnFocus)
Sets this view's preference for reveal behavior when it gains focus. |
final
void
|
setRight(int right)
Sets the right position of this view relative to its parent. |
void
|
setRotation(float rotation)
Sets the degrees that the view is rotated around the pivot point. |
void
|
setRotationX(float rotationX)
Sets the degrees that the view is rotated around the horizontal axis through the pivot point. |
void
|
setRotationY(float rotationY)
Sets the degrees that the view is rotated around the vertical axis through the pivot point. |
void
|
setSaveEnabled(boolean enabled)
Controls whether the saving of this view's state is
enabled (that is, whether its |
void
|
setSaveFromParentEnabled(boolean enabled)
Controls whether the entire hierarchy under this view will save its state when a state saving traversal occurs from its parent. |
void
|
setScaleX(float scaleX)
Sets the amount that the view is scaled in x around the pivot point, as a proportion of the view's unscaled width. |
void
|
setScaleY(float scaleY)
Sets the amount that the view is scaled in Y around the pivot point, as a proportion of the view's unscaled width. |
void
|
setScreenReaderFocusable(boolean screenReaderFocusable)
Sets whether this View should be a focusable element for screen readers and include non-focusable Views from its subtree when providing feedback. |
void
|
setScrollBarDefaultDelayBeforeFade(int scrollBarDefaultDelayBeforeFade)
Define the delay before scrollbars fade. |
void
|
setScrollBarFadeDuration(int scrollBarFadeDuration)
Define the scrollbar fade duration. |
void
|
setScrollBarSize(int scrollBarSize)
Define the scrollbar size. |
void
|
setScrollBarStyle(int style)
Specify the style of the scrollbars. |
final
void
|
setScrollCaptureCallback(ScrollCaptureCallback callback)
Sets the callback to receive scroll capture requests. |
void
|
setScrollCaptureHint(int hint)
Sets the scroll capture hint for this View. |
void
|
setScrollContainer(boolean isScrollContainer)
Change whether this view is one of the set of scrollable containers in its window. |
void
|
setScrollIndicators(int indicators, int mask)
Sets the state of the scroll indicators specified by the mask. |
void
|
setScrollIndicators(int indicators)
Sets the state of all scroll indicators. |
void
|
setScrollX(int value)
Set the horizontal scrolled position of your view. |
void
|
setScrollY(int value)
Set the vertical scrolled position of your view. |
void
|
setScrollbarFadingEnabled(boolean fadeScrollbars)
Define whether scrollbars will fade when the view is not scrolling. |
void
|
setSelected(boolean selected)
Changes the selection state of this view. |
void
|
setSoundEffectsEnabled(boolean soundEffectsEnabled)
Set whether this view should have sound effects enabled for events such as clicking and touching. |
void
|
setStateDescription(CharSequence stateDescription)
Sets the |
void
|
setStateListAnimator(StateListAnimator stateListAnimator)
Attaches the provided StateListAnimator to this View. |
void
|
setSupplementalDescription(CharSequence supplementalDescription)
Sets the |
void
|
setSystemGestureExclusionRects(List<Rect> rects)
Sets a list of areas within this view's post-layout coordinate space where the system should not intercept touch or other pointing device gestures. |
void
|
setSystemUiVisibility(int visibility)
This method was deprecated
in API level 30.
SystemUiVisibility flags are deprecated. Use |
void
|
setTag(int key, Object tag)
Sets a tag associated with this view and a key. |
void
|
setTag(Object tag)
Sets the tag associated with this view. |
void
|
setTextAlignment(int textAlignment)
Set the text alignment. |
void
|
setTextDirection(int textDirection)
Set the text direction. |
void
|
setTooltipText(CharSequence tooltipText)
Sets the tooltip text which will be displayed in a small popup next to the view. |
final
void
|
setTop(int top)
Sets the top position of this view relative to its parent. |
void
|
setTouchDelegate(TouchDelegate delegate)
Sets the TouchDelegate for this View. |
void
|
setTransitionAlpha(float alpha)
This property is intended only for use by the Fade transition, which animates it to produce a visual translucency that does not side-effect (or get affected by) the real alpha property. |
final
void
|
setTransitionName(String transitionName)
Sets the name of the View to be used to identify Views in Transitions. |
void
|
setTransitionVisibility(int visibility)
Changes the visibility of this View without triggering any other changes. |
void
|
setTranslationX(float translationX)
Sets the horizontal location of this view relative to its |
void
|
setTranslationY(float translationY)
Sets the vertical location of this view relative to its |
void
|
setTranslationZ(float translationZ)
Sets the depth location of this view relative to its |
void
|
setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled)
Define whether the vertical edges should be faded when this view is scrolled vertically. |
void
|
setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled)
Define whether the vertical scrollbar should be drawn or not. |
void
|
setVerticalScrollbarPosition(int position)
Set the position of the vertical scroll bar. |
void
|
setVerticalScrollbarThumbDrawable(Drawable drawable)
Defines the vertical scrollbar thumb drawable |
void
|
setVerticalScrollbarTrackDrawable(Drawable drawable)
Defines the vertical scrollbar track drawable |
void
|
setViewTranslationCallback(ViewTranslationCallback callback)
Sets a |
void
|
setVisibility(int visibility)
Set the visibility state of this view. |
void
|
setWillNotCacheDrawing(boolean willNotCacheDrawing)
This method was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, |
void
|
setWillNotDraw(boolean willNotDraw)
If this view doesn't do any drawing on its own, set this flag to allow further optimizations. |
void
|
setWindowInsetsAnimationCallback(WindowInsetsAnimation.Callback callback)
Sets a |
void
|
setX(float x)
Sets the visual x position of this view, in pixels. |
void
|
setY(float y)
Sets the visual y position of this view, in pixels. |
void
|
setZ(float z)
Sets the visual z position of this view, in pixels. |
boolean
|
showContextMenu()
Shows the context menu for this view. |
boolean
|
showContextMenu(float x, float y)
Shows the context menu for this view anchored to the specified view-relative coordinate. |
ActionMode
|
startActionMode(ActionMode.Callback callback, int type)
Start an action mode with the given type. |
ActionMode
|
startActionMode(ActionMode.Callback callback)
Start an action mode with the default type |
void
|
startAnimation(Animation animation)
Start the specified animation now. |
final
boolean
|
startDrag(ClipData data, View.DragShadowBuilder shadowBuilder, Object myLocalState, int flags)
This method was deprecated
in API level 24.
Use |
final
boolean
|
startDragAndDrop(ClipData data, View.DragShadowBuilder shadowBuilder, Object myLocalState, int flags)
Starts a drag and drop operation. |
boolean
|
startNestedScroll(int axes)
Begin a nestable scroll operation along the given axes. |
void
|
stopNestedScroll()
Stop a nested scroll in progress. |
String
|
toString()
Returns a string representation of the object. |
void
|
transformMatrixToGlobal(Matrix matrix)
Modifies the input matrix such that it maps view-local coordinates to on-screen coordinates. |
void
|
transformMatrixToLocal(Matrix matrix)
Modifies the input matrix such that it maps on-screen coordinates to view-local coordinates. |
void
|
unscheduleDrawable(Drawable who, Runnable what)
Cancels a scheduled action on a drawable. |
void
|
unscheduleDrawable(Drawable who)
Unschedule any events associated with the given Drawable. |
final
void
|
updateDragShadow(View.DragShadowBuilder shadowBuilder)
Updates the drag shadow for the ongoing drag and drop operation. |
boolean
|
willNotCacheDrawing()
This method was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, |
boolean
|
willNotDraw()
Returns whether or not this View draws on its own. |
Protected methods | |
|---|---|
boolean
|
awakenScrollBars(int startDelay, boolean invalidate)
Trigger the scrollbars to draw. |
boolean
|
awakenScrollBars(int startDelay)
Trigger the scrollbars to draw. |
boolean
|
awakenScrollBars()
Trigger the scrollbars to draw. |
int
|
computeHorizontalScrollExtent()
Compute the horizontal extent of the horizontal scrollbar's thumb within the horizontal range. |
int
|
computeHorizontalScrollOffset()
Compute the horizontal offset of the horizontal scrollbar's thumb within the horizontal range. |
int
|
computeHorizontalScrollRange()
Compute the horizontal range that the horizontal scrollbar represents. |
int
|
computeVerticalScrollExtent()
Compute the vertical extent of the vertical scrollbar's thumb within the vertical range. |
int
|
computeVerticalScrollOffset()
Compute the vertical offset of the vertical scrollbar's thumb within the horizontal range. |
int
|
computeVerticalScrollRange()
Compute the vertical range that the vertical scrollbar represents. |
void
|
dispatchDraw(Canvas canvas)
Called by draw to draw the child views. |
boolean
|
dispatchGenericFocusedEvent(MotionEvent event)
Dispatch a generic motion event to the currently focused view. |
boolean
|
dispatchGenericPointerEvent(MotionEvent event)
Dispatch a generic motion event to the view under the first pointer. |
boolean
|
dispatchHoverEvent(MotionEvent event)
Dispatch a hover event. |
void
|
dispatchRestoreInstanceState(SparseArray<Parcelable> container)
Called by |
void
|
dispatchSaveInstanceState(SparseArray<Parcelable> container)
Called by |
void
|
dispatchSetActivated(boolean activated)
Dispatch setActivated to all of this View's children. |
void
|
dispatchSetPressed(boolean pressed)
Dispatch setPressed to all of this View's children. |
void
|
dispatchSetSelected(boolean selected)
Dispatch setSelected to all of this View's children. |
void
|
dispatchVisibilityChanged(View changedView, int visibility)
Dispatch a view visibility change down the view hierarchy. |
void
|
drawableStateChanged()
This function is called whenever the state of the view changes in such a way that it impacts the state of drawables being shown. |
boolean
|
fitSystemWindows(Rect insets)
This method was deprecated
in API level 20.
As of API 20 use |
float
|
getBottomFadingEdgeStrength()
Returns the strength, or intensity, of the bottom faded edge. |
int
|
getBottomPaddingOffset()
Amount by which to extend the bottom fading region. |
ContextMenu.ContextMenuInfo
|
getContextMenuInfo()
Views should implement this if they have extra information to associate with the context menu. |
int
|
getHorizontalScrollbarHeight()
Returns the height of the horizontal scrollbar. |
float
|
getLeftFadingEdgeStrength()
Returns the strength, or intensity, of the left faded edge. |
int
|
getLeftPaddingOffset()
Amount by which to extend the left fading region. |
float
|
getRightFadingEdgeStrength()
Returns the strength, or intensity, of the right faded edge. |
int
|
getRightPaddingOffset()
Amount by which to extend the right fading region. |
int
|
getSuggestedMinimumHeight()
Returns the suggested minimum height that the view should use. |
int
|
getSuggestedMinimumWidth()
Returns the suggested minimum width that the view should use. |
float
|
getTopFadingEdgeStrength()
Returns the strength, or intensity, of the top faded edge. |
int
|
getTopPaddingOffset()
Amount by which to extend the top fading region. |
int
|
getWindowAttachCount()
|
boolean
|
isPaddingOffsetRequired()
If the View draws content inside its padding and enables fading edges, it needs to support padding offsets. |
static
int[]
|
mergeDrawableStates(int[] baseState, int[] additionalState)
Merge your own state values in additionalState into the base
state values baseState that were returned by
|
void
|
onAnimationEnd()
Invoked by a parent ViewGroup to notify the end of the animation currently associated with this view. |
void
|
onAnimationStart()
Invoked by a parent ViewGroup to notify the start of the animation currently associated with this view. |
void
|
onAttachedToWindow()
This is called when the view is attached to a window. |
void
|
onConfigurationChanged(Configuration newConfig)
Called when the current configuration of the resources being used by the application have changed. |
void
|
onCreateContextMenu(ContextMenu menu)
Views should implement this if the view itself is going to add items to the context menu. |
int[]
|
onCreateDrawableState(int extraSpace)
Generate the new |
void
|
onDetachedFromWindow()
This is called when the view is detached from a window. |
void
|
onDisplayHint(int hint)
Gives this view a hint about whether is displayed or not. |
void
|
onDraw(Canvas canvas)
Implement this to do your drawing. |
final
void
|
onDrawScrollBars(Canvas canvas)
Request the drawing of the horizontal and the vertical scrollbar. |
void
|
onFinishInflate()
Finalize inflating a view from XML. |
void
|
onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect)
Called by the view system when the focus state of this view changes. |
void
|
onLayout(boolean changed, int left, int top, int right, int bottom)
Called from layout when this view should assign a size and position to each of its children. |
void
|
onMeasure(int widthMeasureSpec, int heightMeasureSpec)
Measure the view and its content to determine the measured width and the measured height. |
void
|
onOverScrolled(int scrollX, int scrollY, boolean clampedX, boolean clampedY)
Called by |
void
|
onRestoreInstanceState(Parcelable state)
Hook allowing a view to re-apply a representation of its internal state that had previously
been generated by |
Parcelable
|
onSaveInstanceState()
Hook allowing a view to generate a representation of its internal state that can later be used to create a new instance with that same state. |
void
|
onScrollChanged(int l, int t, int oldl, int oldt)
This is called in response to an internal scroll in this view (i.e., the view scrolled its own contents). |
boolean
|
onSetAlpha(int alpha)
Invoked if there is a Transform that involves alpha. |
void
|
onSizeChanged(int w, int h, int oldw, int oldh)
This is called during layout when the size of this view has changed. |
void
|
onVisibilityChanged(View changedView, int visibility)
Called when the visibility of the view or an ancestor of the view has changed. |
void
|
onWindowVisibilityChanged(int visibility)
Called when the window containing has change its visibility
(between |
boolean
|
overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent)
Scroll the view with standard behavior for scrolling beyond the normal content boundaries. |
final
void
|
setMeasuredDimension(int measuredWidth, int measuredHeight)
This method must be called by |
boolean
|
verifyDrawable(Drawable who)
If your view subclass is displaying its own Drawable objects, it should override this function and return true for any Drawable it is displaying. |
Inherited methods | |
|---|---|
XML attributes
android:accessibilityHeading
Whether or not this view is a heading for accessibility purposes.
May be a boolean value, such as "true" or
"false".
Related methods:
android:accessibilityLiveRegion
Indicates to accessibility services whether the user should be notified when this view changes.
May be an integer value, such as "100".
Must be one of the following constant values.
| Constant | Value | Description |
|---|---|---|
| assertive | 2 | Accessibility services should interrupt ongoing speech to immediately announce changes to this view. |
| none | 0 | Accessibility services should not announce changes to this view. |
| polite | 1 | Accessibility services should announce changes to this view. |
Related methods:
android:accessibilityPaneTitle
The title this view should present to accessibility as a pane title.
See View.setAccessibilityPaneTitle(CharSequence)
May be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character;
Related methods:
android:accessibilityTraversalAfter
Sets the id of a view that screen readers are requested to visit before this view. Requests that a screen-reader visits the content of the other view before the content of this one. This does nothing if either view is not important for accessibility.
May be an integer value, such as "100".
Related methods:
android:accessibilityTraversalBefore
Sets the id of a view that screen readers are requested to visit after this view. Requests that a screen-reader visits the content of this view before the content of the one it precedes. This does nothing if either view is not important for accessibility.
May be an integer value, such as "100".
Related methods:
android:allowClickWhenDisabled
Whether or not allow clicks on disabled view.
May be a boolean value, such as "true" or
"false".
Related methods:
android:alpha
alpha property of the view, as a value between 0 (completely transparent) and 1 (completely opaque).
May be a floating point value, such as "1.2".
Related methods:
android:autoHandwritingEnabled
Whether or not the auto handwriting initiation is enabled in this View.
For a view with an active InputConnection,
if auto handwriting initiation is enabled, stylus movement within its view boundary
will automatically trigger the handwriting mode.
See View.setAutoHandwritingEnabled(boolean).
The default value of this flag is configurable by the device manufacturer.
May be a boolean value, such as "true" or
"false".
Related methods:
android:autofillHints
Describes the content of a view so that a autofill service can fill in the appropriate data. Multiple hints can be combined in a comma separated list or an array of strings to mean e.g. emailAddress or postalAddress.
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
May be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character;
Related methods:
android:autofilledHighlight
Drawable to be drawn over the view to mark it as autofilled
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
Related methods:
android:background
A drawable to use as the background. This can be either a reference to a full drawable resource (such as a PNG image, 9-patch, XML state list description, etc), or a solid color such as "#ff000000" (black).
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
May be a color value, in the form of "#rgb",
"#argb", "#rrggbb", or
"#aarrggbb".
Related methods:
android:backgroundTint
Tint to apply to the background.
May be a color value, in the form of "#rgb",
"#argb", "#rrggbb", or
"#aarrggbb".
Related methods:
android:backgroundTintMode
Blending mode used to apply the background tint.
Must be one of the following constant values.
| Constant | Value | Description |
|---|---|---|
| add | 10 | Combines the tint and drawable color and alpha channels, clamping the result to valid color values. Saturate(S + D) |
| multiply | e | Multiplies the color and alpha channels of the drawable with those of the tint. [Sa * Da, Sc * Dc] |
| screen | f | [Sa + Da - Sa * Da, Sc + Dc - Sc * Dc] |
| src_atop | 9 | The tint is drawn above the drawable, but with the drawable\u2019s alpha channel masking the result. [Da, Sc * Da + (1 - Sa) * Dc] |
| src_in | 5 | The tint is masked by the alpha channel of the drawable. The drawable\u2019s color channels are thrown out. [Sa * Da, Sc * Da] |
| src_over | 3 | The tint is drawn on top of the drawable. [Sa + (1 - Sa)*Da, Rc = Sc + (1 - Sa)*Dc] |
Related methods:
android:clickable
Defines whether this view reacts to click events.
May be a boolean value, such as "true" or
"false".
Related methods:
android:clipToOutline
Whether the View's Outline should be used to clip the contents of the View.
Only a single non-rectangular clip can be applied on a View at any time. Circular
clips from a
ViewAnimationUtils.createCircularReveal(View, int, int, float, float) circular reveal animation take priority over Outline clipping, and child
Outline clipping takes priority over Outline clipping done by a parent.
Note that this flag will only be respected if the View's Outline returns true from
Outline.canClip().
May be a boolean value, such as "true" or
"false".
Related methods:
android:contentDescription
Defines text that briefly describes content of the view. This property is used primarily for accessibility. Since some views do not have textual representation this attribute can be used for providing such.
May be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character;
Related methods:
android:contextClickable
Defines whether this view reacts to context click events.
May be a boolean value, such as "true" or
"false".
Related methods:
android:defaultFocusHighlightEnabled
Whether this View should use a default focus highlight when it gets focused but
doesn't have R.attr.state_focused defined in its background.
May be a boolean value, such as "true" or
"false".
Related methods:
android:drawingCacheQuality
Defines the quality of translucent drawing caches. This property is used only when the drawing cache is enabled and translucent. The default value is auto. Deprecated: The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11.
Must be one of the following constant values.
| Constant | Value | Description |
|---|---|---|
| auto | 0 | Lets the framework decide what quality level should be used for the drawing cache. Deprecated: The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. |
| high | 2 | High quality. When set to high quality, the drawing cache uses a higher color depth but uses more memory. Deprecated: The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. |
| low | 1 | Low quality. When set to low quality, the drawing cache uses a lower color depth, thus losing precision in rendering gradients, but uses less memory. Deprecated: The view drawing cache was largely made obsolete with the introduction of hardware-accelerated rendering in API 11. |
Related methods:
android:duplicateParentState
When this attribute is set to true, the view gets its drawable state (focused, pressed, etc.) from its direct parent rather than from itself.
May be a boolean value, such as "true" or
"false".
android:elevation
base z depth of the view.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:fadeScrollbars
Defines whether to fade out scrollbars when they are not in use.
May be a boolean value, such as "true" or
"false".
Related methods:
android:fadingEdgeLength
Defines the length of the fading edges.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:filterTouchesWhenObscured
Specifies whether to filter touches when the view's window is obscured by
another visible window. When set to true, the view will not receive touches
whenever a toast, dialog or other window appears above the view's window.
Refer to the View security documentation for more details.
May be a boolean value, such as "true" or
"false".
Related methods:
android:fitsSystemWindows
Boolean internal attribute to adjust view layout based on system windows such as the status bar. If true, adjusts the padding of this view to leave space for the system windows. Will only take effect if this view is in a non-embedded activity.
May be a boolean value, such as "true" or
"false".
Related methods:
android:focusable
Controls whether a view can take focus. By default, this is "auto" which lets the
framework determine whether a user can move focus to a view. By setting this attribute
to true the view is allowed to take focus. By setting it to "false" the view will not
take focus. This value does not impact the behavior of
directly calling View.requestFocus(), which will
always request focus regardless of this view. It only impacts where
focus navigation will try to move focus.
May be a boolean value, such as "true" or
"false".
Must be one of the following constant values.
| Constant | Value | Description |
|---|---|---|
| auto | 10 |
Related methods:
android:focusableInTouchMode
Boolean that controls whether a view can take focus while in touch mode. If this is true for a view, that view can gain focus when clicked on, and can keep focus if another view is clicked on that doesn't have this attribute set to true.
May be a boolean value, such as "true" or
"false".
Related methods:
android:focusedByDefault
Whether this view is a default-focus view.
Only one view per keyboard navigation cluster can have this attribute set to true.
See View.setFocusedByDefault(boolean).
May be a boolean value, such as "true" or
"false".
Related methods:
android:forceHasOverlappingRendering
Whether this view has elements that may overlap when drawn. See
View.forceHasOverlappingRendering(boolean).
May be a boolean value, such as "true" or
"false".
Related methods:
android:foreground
Defines the drawable to draw over the content. This can be used as an overlay. The foreground drawable participates in the padding of the content if the gravity is set to fill.
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
May be a color value, in the form of "#rgb",
"#argb", "#rrggbb", or
"#aarrggbb".
Related methods:
android:foregroundGravity
Defines the gravity to apply to the foreground drawable. The gravity defaults to fill.
Must be one or more (separated by '|') of the following constant values.
| Constant | Value | Description |
|---|---|---|
| bottom | 50 | Push object to the bottom of its container, not changing its size. |
| center | 11 | Place the object in the center of its container in both the vertical and horizontal axis, not changing its size. |
| center_horizontal | 1 | Place object in the horizontal center of its container, not changing its size. |
| center_vertical | 10 | Place object in the vertical center of its container, not changing its size. |
| clip_horizontal | 8 | Additional option that can be set to have the left and/or right edges of the child clipped to its container's bounds. The clip will be based on the horizontal gravity: a left gravity will clip the right edge, a right gravity will clip the left edge, and neither will clip both edges. |
| clip_vertical | 80 | Additional option that can be set to have the top and/or bottom edges of the child clipped to its container's bounds. The clip will be based on the vertical gravity: a top gravity will clip the bottom edge, a bottom gravity will clip the top edge, and neither will clip both edges. |
| fill | 77 | Grow the horizontal and vertical size of the object if needed so it completely fills its container. |
| fill_horizontal | 7 | Grow the horizontal size of the object if needed so it completely fills its container. |
| fill_vertical | 70 | Grow the vertical size of the object if needed so it completely fills its container. |
| left | 3 | Push object to the left of its container, not changing its size. |
| right | 5 | Push object to the right of its container, not changing its size. |
| top | 30 | Push object to the top of its container, not changing its size. |
Related methods:
android:foregroundTint
Tint to apply to the foreground.
May be a color value, in the form of "#rgb",
"#argb", "#rrggbb", or
"#aarrggbb".
Related methods:
android:foregroundTintMode
Blending mode used to apply the foreground tint.
Must be one of the following constant values.
| Constant | Value | Description |
|---|---|---|
| add | 10 | Combines the tint and drawable color and alpha channels, clamping the result to valid color values. Saturate(S + D) |
| multiply | e | Multiplies the color and alpha channels of the drawable with those of the tint. [Sa * Da, Sc * Dc] |
| screen | f | [Sa + Da - Sa * Da, Sc + Dc - Sc * Dc] |
| src_atop | 9 | The tint is drawn above the drawable, but with the drawable\u2019s alpha channel masking the result. [Da, Sc * Da + (1 - Sa) * Dc] |
| src_in | 5 | The tint is masked by the alpha channel of the drawable. The drawable\u2019s color channels are thrown out. [Sa * Da, Sc * Da] |
| src_over | 3 | The tint is drawn on top of the drawable. [Sa + (1 - Sa)*Da, Rc = Sc + (1 - Sa)*Dc] |
Related methods:
android:hapticFeedbackEnabled
Boolean that controls whether a view should have haptic feedback enabled for events such as long presses.
May be a boolean value, such as "true" or
"false".
Related methods:
android:id
Supply an identifier name for this view, to later retrieve it
with View.findViewById() or
Activity.findViewById().
This must be a
resource reference; typically you set this using the
@+ syntax to create a new ID resources.
For example: android:id="@+id/my_id" which
allows you to later retrieve the view
with findViewById(R.id.my_id).
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
Related methods:
android:importantForAccessibility
Describes whether or not this view is important for accessibility. If it is important, the view fires accessibility events and is reported to accessibility services that query the screen. Note: While not recommended, an accessibility service may decide to ignore this attribute and operate on all views in the view tree.
May be an integer value, such as "100".
Must be one of the following constant values.
| Constant | Value | Description |
|---|---|---|
| auto | 0 | The system determines whether the view is important for accessibility - default (recommended). |
| no | 2 | The view is not important for accessibility. |
| noHideDescendants | 4 | The view is not important for accessibility, nor are any of its descendant views. |
| yes | 1 | The view is important for accessibility. |
Related methods:
android:importantForAutofill
Hints the Android System whether the view node associated with this View should be included in a view structure used for autofill purposes.
Must be one or more (separated by '|') of the following constant values.
| Constant | Value | Description |
|---|---|---|
| auto | 0 | Let the Android System use its heuristics to determine if the view is important for autofill. |
| no | 2 | Hint the Android System that this view is *not* important for autofill, but its children (if any) will be traversed.. |
| noExcludeDescendants | 8 | Hint the Android System that this view is *not* important for autofill, and its children (if any) will not be traversed. |
| yes | 1 | Hint the Android System that this view is important for autofill, and its children (if any) will be traversed.. |
| yesExcludeDescendants | 4 | Hint the Android System that this view is important for autofill, but its children (if any) will not be traversed. |
Related methods:
android:importantForContentCapture
Hints the Android System whether the view node associated with this View should be use for content capture purposes.
Must be one or more (separated by '|') of the following constant values.
| Constant | Value | Description |
|---|---|---|
| auto | 0 | Let the Android System use its heuristics to determine if the view is important for content capture. |
| no | 2 | Hint the Android System that this view is *not* important for content capture, but its children (if any) will be traversed.. |
| noExcludeDescendants | 8 | Hint the Android System that this view is *not* important for content capture, and its children (if any) will not be traversed. |
| yes | 1 | Hint the Android System that this view is important for content capture, and its children (if any) will be traversed.. |
| yesExcludeDescendants | 4 | Hint the Android System that this view is important for content capture, but its children (if any) will not be traversed. |
Related methods:
android:isCredential
Boolean that hints the Android System that the view is credential and associated with CredentialManager
May be a boolean value, such as "true" or
"false".
Related methods:
android:isScrollContainer
Set this if the view will serve as a scrolling container, meaning that it can be resized to shrink its overall window so that there will be space for an input method. If not set, the default value will be true if "scrollbars" has the vertical scrollbar set, else it will be false.
May be a boolean value, such as "true" or
"false".
Related methods:
android:keepScreenOn
Controls whether the view's window should keep the screen on while visible.
May be a boolean value, such as "true" or
"false".
Related methods:
android:keyboardNavigationCluster
Whether this view is a root of a keyboard navigation cluster.
See View.setKeyboardNavigationCluster(boolean).
May be a boolean value, such as "true" or
"false".
Related methods:
android:layerType
Specifies the type of layer backing this view. The default value is none.
Refer to View.setLayerType(int, android.graphics.Paint)
for more information.
Must be one of the following constant values.
| Constant | Value | Description |
|---|---|---|
| hardware | 2 | Use a hardware layer. Refer to
View.setLayerType(int, android.graphics.Paint) for
more information. |
| none | 0 | Don't use a layer. |
| software | 1 | Use a software layer. Refer to
View.setLayerType(int, android.graphics.Paint) for
more information. |
Related methods:
android:layoutDirection
Defines the direction of layout drawing. This typically is associated with writing direction of the language script used. The possible values are "ltr" for Left-to-Right, "rtl" for Right-to-Left, "locale", and "inherit" from parent view. If there is nothing to inherit, "locale" is used. "locale" falls back to "en-US". "ltr" is the direction used in "en-US". The default for this attribute is "inherit".
Must be one of the following constant values.
| Constant | Value | Description |
|---|---|---|
| inherit | 2 | Inherit from parent. |
| locale | 3 | Locale. |
| ltr | 0 | Left-to-Right. |
| rtl | 1 | Right-to-Left. |
Related methods:
android:longClickable
Defines whether this view reacts to long click events.
May be a boolean value, such as "true" or
"false".
Related methods:
android:minHeight
Defines the minimum height of the view. It is not guaranteed the view will be able to achieve this minimum height (for example, if its parent layout constrains it with less available height).
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:minWidth
Defines the minimum width of the view. It is not guaranteed the view will be able to achieve this minimum width (for example, if its parent layout constrains it with less available width).
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:nextClusterForward
Defines the next keyboard navigation cluster.
If the reference refers to a view that does not exist or is part
of a hierarchy that is invisible, a RuntimeException
will result when the reference is accessed.
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
Related methods:
android:nextFocusDown
Defines the next view to give focus to when the next focus is
View.FOCUS_DOWN
If the reference refers to a view that does not exist or is part
of a hierarchy that is invisible, a RuntimeException
will result when the reference is accessed.
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
Related methods:
android:nextFocusForward
Defines the next view to give focus to when the next focus is
View.FOCUS_FORWARD
If the reference refers to a view that does not exist or is part
of a hierarchy that is invisible, a RuntimeException
will result when the reference is accessed.
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
Related methods:
android:nextFocusLeft
Defines the next view to give focus to when the next focus is
View.FOCUS_LEFT.
If the reference refers to a view that does not exist or is part
of a hierarchy that is invisible, a RuntimeException
will result when the reference is accessed.
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
Related methods:
android:nextFocusRight
Defines the next view to give focus to when the next focus is
View.FOCUS_RIGHT
If the reference refers to a view that does not exist or is part
of a hierarchy that is invisible, a RuntimeException
will result when the reference is accessed.
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
Related methods:
android:nextFocusUp
Defines the next view to give focus to when the next focus is
View.FOCUS_UP
If the reference refers to a view that does not exist or is part
of a hierarchy that is invisible, a RuntimeException
will result when the reference is accessed.
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
Related methods:
android:onClick
Name of the method in this View's context to invoke when the view is
clicked. This name must correspond to a public method that takes
exactly one parameter of type View. For instance, if you specify
android:onClick="sayHello", you must declare a
public void sayHello(View v) method of your context
(typically, your Activity).
May be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character;
android:outlineAmbientShadowColor
Sets the color of the ambient shadow that is drawn when the view has a positive Z or elevation value.
By default the shadow color is black. Generally, this color will be opaque so the intensity of the shadow is consistent between different views with different colors.
The opacity of the final ambient shadow is a function of the shadow caster height,
the alpha channel of the outlineAmbientShadowColor (typically opaque), and the
R.attr.ambientShadowAlpha theme attribute.
May be a color value, in the form of "#rgb",
"#argb", "#rrggbb", or
"#aarrggbb".
Related methods:
android:outlineSpotShadowColor
Sets the color of the spot shadow that is drawn when the view has a positive Z or elevation value.
By default the shadow color is black. Generally, this color will be opaque so the intensity of the shadow is consistent between different views with different colors.
The opacity of the final spot shadow is a function of the shadow caster height, the
alpha channel of the outlineSpotShadowColor (typically opaque), and the
R.attr.spotShadowAlpha theme attribute.
May be a color value, in the form of "#rgb",
"#argb", "#rrggbb", or
"#aarrggbb".
Related methods:
android:padding
Sets the padding, in pixels, of all four edges. Padding is defined as
space between the edges of the view and the view's content. This value will take
precedence over any of the edge-specific values (paddingLeft, paddingTop,
paddingRight, paddingBottom, paddingHorizontal and paddingVertical), but will
not override paddingStart or paddingEnd, if set. A view's size
will include its padding. If a R.attr.background
is provided, the padding will initially be set to that (0 if the
drawable does not have padding). Explicitly setting a padding value
will override the corresponding padding found in the background.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:paddingBottom
Sets the padding, in pixels, of the bottom edge; see R.attr.padding.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:paddingEnd
Sets the padding, in pixels, of the end edge; see R.attr.padding.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:paddingHorizontal
Sets the padding, in pixels, of the left and right edges; see
R.attr.padding. This value will take precedence over
paddingLeft and paddingRight, but not paddingStart or paddingEnd (if set).
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
android:paddingLeft
Sets the padding, in pixels, of the left edge; see R.attr.padding.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:paddingRight
Sets the padding, in pixels, of the right edge; see R.attr.padding.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:paddingStart
Sets the padding, in pixels, of the start edge; see R.attr.padding.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:paddingTop
Sets the padding, in pixels, of the top edge; see R.attr.padding.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:paddingVertical
Sets the padding, in pixels, of the top and bottom edges; see
R.attr.padding. This value will take precedence over
paddingTop and paddingBottom, if set.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
android:preferKeepClear
Sets a preference to keep the bounds of this view clear from floating windows above this view's window. This informs the system that the view is considered a vital area for the user and that ideally it should not be covered. Setting this is only appropriate for UI where the user would likely take action to uncover it.
The system will try to respect this, but when not possible will ignore it.
This is equivalent to View.setPreferKeepClear(boolean).
May be a boolean value, such as "true" or
"false".
Related methods:
android:requiresFadingEdge
Defines which edges should be faded on scrolling.
Must be one or more (separated by '|') of the following constant values.
| Constant | Value | Description |
|---|---|---|
| horizontal | 1000 | Fades horizontal edges only. |
| none | 0 | No edge is faded. |
| vertical | 2000 | Fades vertical edges only. |
Related methods:
android:rotation
rotation of the view, in degrees.
May be a floating point value, such as "1.2".
Related methods:
android:rotationX
rotation of the view around the x axis, in degrees.
May be a floating point value, such as "1.2".
Related methods:
android:rotationY
rotation of the view around the y axis, in degrees.
May be a floating point value, such as "1.2".
Related methods:
android:saveEnabled
If false, no state will be saved for this view when it is being frozen. The default is true, allowing the view to be saved (however it also must have an ID assigned to it for its state to be saved). Setting this to false only disables the state for this view, not for its children which may still be saved.
May be a boolean value, such as "true" or
"false".
Related methods:
android:scaleX
scale of the view in the x direction.
May be a floating point value, such as "1.2".
Related methods:
android:scaleY
scale of the view in the y direction.
May be a floating point value, such as "1.2".
Related methods:
android:screenReaderFocusable
Whether this view should be treated as a focusable unit by screen reader accessibility
tools. See View.setScreenReaderFocusable(boolean). The default
value, false, leaves the screen reader to consider other signals, such as
focusability or the presence of text, to decide what it focus.
May be a boolean value, such as "true" or
"false".
Related methods:
android:scrollIndicators
Defines which scroll indicators should be displayed when the view can be scrolled. Multiple values may be combined using logical OR, for example "top|bottom".
Must be one or more (separated by '|') of the following constant values.
| Constant | Value | Description |
|---|---|---|
| bottom | 2 | Displays bottom scroll indicator when vew can be scrolled down. |
| end | 20 | Displays right scroll indicator when vew can be scrolled in the end direction. |
| left | 4 | Displays left scroll indicator when vew can be scrolled left. |
| none | 0 | No scroll indicators are displayed. |
| right | 8 | Displays right scroll indicator when vew can be scrolled right. |
| start | 10 | Displays right scroll indicator when vew can be scrolled in the start direction. |
| top | 1 | Displays top scroll indicator when view can be scrolled up. |
Related methods:
android:scrollX
The initial horizontal scroll offset, in pixels.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
android:scrollY
The initial vertical scroll offset, in pixels.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
android:scrollbarAlwaysDrawHorizontalTrack
Defines whether the horizontal scrollbar track should always be drawn.
May be a boolean value, such as "true" or
"false".
android:scrollbarAlwaysDrawVerticalTrack
Defines whether the vertical scrollbar track should always be drawn.
May be a boolean value, such as "true" or
"false".
android:scrollbarDefaultDelayBeforeFade
Defines the delay in milliseconds that a scrollbar waits before fade out.
May be an integer value, such as "100".
Related methods:
android:scrollbarFadeDuration
Defines the delay in milliseconds that a scrollbar takes to fade out.
May be an integer value, such as "100".
Related methods:
android:scrollbarSize
Sets the width of vertical scrollbars and height of horizontal scrollbars.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:scrollbarStyle
Controls the scrollbar style and position. The scrollbars can be overlaid or inset. When inset, they add to the padding of the view. And the scrollbars can be drawn inside the padding area or on the edge of the view. For example, if a view has a background drawable and you want to draw the scrollbars inside the padding specified by the drawable, you can use insideOverlay or insideInset. If you want them to appear at the edge of the view, ignoring the padding, then you can use outsideOverlay or outsideInset.
Must be one of the following constant values.
| Constant | Value | Description |
|---|---|---|
| insideInset | 1000000 | Inside the padding and inset. |
| insideOverlay | 0 | Inside the padding and overlaid. |
| outsideInset | 3000000 | Edge of the view and inset. |
| outsideOverlay | 2000000 | Edge of the view and overlaid. |
Related methods:
android:scrollbarThumbHorizontal
Defines the horizontal scrollbar thumb drawable.
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
Related methods:
android:scrollbarThumbVertical
Defines the vertical scrollbar thumb drawable.
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
Related methods:
android:scrollbarTrackHorizontal
Defines the horizontal scrollbar track drawable.
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
Related methods:
android:scrollbarTrackVertical
Defines the vertical scrollbar track drawable.
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
Related methods:
android:scrollbars
Defines which scrollbars should be displayed on scrolling or not.
Must be one or more (separated by '|') of the following constant values.
| Constant | Value | Description |
|---|---|---|
| horizontal | 100 | Displays horizontal scrollbar only. |
| none | 0 | No scrollbar is displayed. |
| vertical | 200 | Displays vertical scrollbar only. |
android:soundEffectsEnabled
Boolean that controls whether a view should have sound effects enabled for events such as clicking and touching.
May be a boolean value, such as "true" or
"false".
Related methods:
android:stateListAnimator
Sets the state-based animator for the View.
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
android:supplementalDescription
Provides brief supplemental information for the view, such as the purpose of the view when that purpose is not conveyed within its textual representation. This property is used primarily for accessibility.
May be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character;
Related methods:
android:tag
Supply a tag for this view containing a String, to be retrieved
later with View.getTag() or
searched for with View.findViewWithTag(). It is generally preferable to use
IDs (through the android:id attribute) instead of tags because
they are faster and allow for compile-time type checking.
May be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character;
android:textAlignment
Defines the alignment of the text.
May be an integer value, such as "100".
Must be one of the following constant values.
| Constant | Value | Description |
|---|---|---|
| center | 4 | Center the paragraph, for example: ALIGN_CENTER. |
| gravity | 1 | Default for the root view. The gravity determines the alignment, ALIGN_NORMAL, ALIGN_CENTER, or ALIGN_OPPOSITE, which are relative to each paragraph\u2019s text direction. |
| inherit | 0 | Default. |
| textEnd | 3 | Align to the end of the paragraph, for example: ALIGN_OPPOSITE. |
| textStart | 2 | Align to the start of the paragraph, for example: ALIGN_NORMAL. |
| viewEnd | 6 | Align to the end of the view, which is ALIGN_RIGHT if the view\u2019s resolved layoutDirection is LTR, and ALIGN_LEFT otherwise. |
| viewStart | 5 | Align to the start of the view, which is ALIGN_LEFT if the view\u2019s resolved layoutDirection is LTR, and ALIGN_RIGHT otherwise. |
Related methods:
android:textDirection
Defines the direction of the text.
May be an integer value, such as "100".
Must be one of the following constant values.
| Constant | Value | Description |
|---|---|---|
| anyRtl | 2 | The paragraph direction is RTL if it contains any strong RTL character, otherwise it is LTR if it contains any strong LTR characters. If there are neither, the paragraph direction is the view\u2019s resolved layout direction. |
| firstStrong | 1 | Default for the root view. The first strong directional character determines the paragraph direction. If there is no strong directional character, the paragraph direction is the view\u2019s resolved layout direction. |
| firstStrongLtr | 6 | The first strong directional character determines the paragraph direction. If there is no strong directional character, the paragraph direction is LTR. |
| firstStrongRtl | 7 | The first strong directional character determines the paragraph direction. If there is no strong directional character, the paragraph direction is RTL. |
| inherit | 0 | Default. |
| locale | 5 | The paragraph direction is coming from the system Locale. |
| ltr | 3 | The paragraph direction is left to right. |
| rtl | 4 | The paragraph direction is right to left. |
Related methods:
android:theme
Specifies a theme override for a view. When a theme override is set, the
view will be inflated using a Context themed with
the specified resource. During XML inflation, any child views under the
view with a theme override will inherit the themed context.
May be a reference to another resource, in the form
"@[+][package:]type/name" or a theme
attribute in the form
"?[package:]type/name".
android:tooltipText
Defines text displayed in a small popup window on hover or long press.
May be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character;
Related methods:
android:transformPivotX
x location of the pivot point around which the view will rotate and scale. This xml attribute sets the pivotX property of the View.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:transformPivotY
y location of the pivot point around which the view will rotate and scale. This xml attribute sets the pivotY property of the View.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:transitionName
Names a View such that it can be identified for Transitions. Names should be unique in the View hierarchy.
May be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character;
android:translationX
translation in x of the view. This value is added post-layout to the left property of the view, which is set by its layout.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:translationY
translation in y of the view. This value is added post-layout to the top property of the view, which is set by its layout.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:translationZ
translation in z of the view. This value is added to its elevation.
May be a dimension value, which is a floating point number appended with a
unit such as "14.5sp".
Available units are: px (pixels), dp (density-independent pixels),
sp (scaled pixels based on preferred font size), in (inches), and
mm (millimeters).
Related methods:
android:visibility
Controls the initial visibility of the view.
Must be one of the following constant values.
| Constant | Value | Description |
|---|---|---|
| gone | 2 | Completely hidden, as if the view had not been added. |
| invisible | 1 | Not displayed, but taken into account during layout (space is left for it). |
| visible | 0 | Visible on screen; the default value. |
Related methods:
Constants
ACCESSIBILITY_DATA_SENSITIVE_AUTO
public static final int ACCESSIBILITY_DATA_SENSITIVE_AUTO
Automatically determine whether the view should only allow interactions from
AccessibilityServices with the
AccessibilityServiceInfo.isAccessibilityTool() property
set to true.
Accessibility interactions from services without isAccessibilityTool set to true are
disallowed for any of the following conditions:
getFilterTouchesWhenObscured().isAccessibilityDataSensitive().Constant Value: 0 (0x00000000)
ACCESSIBILITY_DATA_SENSITIVE_NO
public static final int ACCESSIBILITY_DATA_SENSITIVE_NO
Allow interactions from all AccessibilityServices,
regardless of their
AccessibilityServiceInfo.isAccessibilityTool() property.
Constant Value: 2 (0x00000002)
ACCESSIBILITY_DATA_SENSITIVE_YES
public static final int ACCESSIBILITY_DATA_SENSITIVE_YES
Only allow interactions from AccessibilityServices
with the AccessibilityServiceInfo.isAccessibilityTool()
property set to true.
Constant Value: 1 (0x00000001)
ACCESSIBILITY_LIVE_REGION_ASSERTIVE
public static final int ACCESSIBILITY_LIVE_REGION_ASSERTIVE
Live region mode specifying that accessibility services should immediately notify users of changes to this view. For example, a screen reader may interrupt ongoing speech to immediately announce these changes.
Use with setAccessibilityLiveRegion(int).
Constant Value: 2 (0x00000002)
ACCESSIBILITY_LIVE_REGION_NONE
public static final int ACCESSIBILITY_LIVE_REGION_NONE
Live region mode specifying that accessibility services should not automatically announce changes to this view. This is the default live region mode for most views.
Use with setAccessibilityLiveRegion(int).
Constant Value: 0 (0x00000000)
ACCESSIBILITY_LIVE_REGION_POLITE
public static final int ACCESSIBILITY_LIVE_REGION_POLITE
Live region mode specifying that accessibility services should notify users of changes to this view.
Use with setAccessibilityLiveRegion(int).
Constant Value: 1 (0x00000001)
AUTOFILL_FLAG_INCLUDE_NOT_IMPORTANT_VIEWS
public static final int AUTOFILL_FLAG_INCLUDE_NOT_IMPORTANT_VIEWS
Flag requesting you to add views that are marked as not important for autofill
(see setImportantForAutofill(int)) to a ViewStructure.
Constant Value: 1 (0x00000001)
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE
public static final String AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE
Hint indicating that this view can be autofilled with a credit card expiration date.
It should be used when the credit card expiration date is represented by just one view;
if it is represented by more than one (for example, one view for the month and another view
for the year), then each of these views should use the hint specific for the unit
(AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY,
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH,
or AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR).
Can be used with either setAutofillHints(java.lang.String[]) or
android:autofillHint (in which case the
value should be .AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE
When annotating a view with this hint, it's recommended to use a date autofill value to avoid ambiguity when the autofill service provides a value for it. To understand why a value can be ambiguous, consider "April of 2020", which could be represented as either of the following options:
"04/2020""4/2020""2020/04""2020/4""April/2020""Apr/2020"
You define a date autofill value for the view by overriding the following methods:
getAutofillType()to returnAUTOFILL_TYPE_DATE.getAutofillValue()to return adate autofillvalue.autofill(android.view.autofill.AutofillValue)to expect a data autofillvalue.
See setAutofillHints(java.lang.String) for more info about autofill hints.
Constant Value: "creditCardExpirationDate"
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY
public static final String AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY
Hint indicating that this view can be autofilled with a credit card expiration day.
Can be used with either setAutofillHints(java.lang.String[]) or
android:autofillHint (in which case the
value should be .AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY
See setAutofillHints(java.lang.String) for more info about autofill hints.
Constant Value: "creditCardExpirationDay"
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH
public static final String AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH
Hint indicating that this view can be autofilled with a credit card expiration month.
Can be used with either setAutofillHints(java.lang.String[]) or
android:autofillHint (in which case the
value should be .AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH
When annotating a view with this hint, it's recommended to use a text autofill value
whose value is the numerical representation of the month, starting on 1 to avoid
ambiguity when the autofill service provides a value for it. To understand why a
value can be ambiguous, consider "January", which could be represented as either of
"1": recommended way."0": if following theCalendar.MONTHconvention."January": full name, in English."jan": abbreviated name, in English."Janeiro": full name, in another language.
Another recommended approach is to use a date autofill value - see
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE for more details.
See setAutofillHints(java.lang.String) for more info about autofill hints.
Constant Value: "creditCardExpirationMonth"
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR
public static final String AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR
Hint indicating that this view can be autofilled with a credit card expiration year.
Can be used with either setAutofillHints(java.lang.String[]) or
android:autofillHint (in which case the
value should be .AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR
See setAutofillHints(java.lang.String) for more info about autofill hints.
Constant Value: "creditCardExpirationYear"
AUTOFILL_HINT_CREDIT_CARD_NUMBER
public static final String AUTOFILL_HINT_CREDIT_CARD_NUMBER
Hint indicating that this view can be autofilled with a credit card number.
Can be used with either setAutofillHints(java.lang.String[]) or
android:autofillHint (in which case the
value should be .AUTOFILL_HINT_CREDIT_CARD_NUMBER
See setAutofillHints(java.lang.String) for more info about autofill hints.
Constant Value: "creditCardNumber"
AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE
public static final String AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE
Hint indicating that this view can be autofilled with a credit card security code.
Can be used with either setAutofillHints(java.lang.String[]) or
android:autofillHint (in which case the
value should be .AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE
See setAutofillHints(java.lang.String) for more info about autofill hints.
Constant Value: "creditCardSecurityCode"
AUTOFILL_HINT_EMAIL_ADDRESS
public static final String AUTOFILL_HINT_EMAIL_ADDRESS
Hint indicating that this view can be autofilled with an email address.
Can be used with either setAutofillHints(java.lang.String[]) or
android:autofillHint (in which case the
value should be .AUTOFILL_HINT_EMAIL_ADDRESS
See setAutofillHints(java.lang.String) for more info about autofill hints.
Constant Value: "emailAddress"
AUTOFILL_HINT_NAME
public static final String AUTOFILL_HINT_NAME
Hint indicating that this view can be autofilled with a user's real name.
Can be used with either setAutofillHints(java.lang.String[]) or
android:autofillHint (in which case the
value should be .AUTOFILL_HINT_NAME
See setAutofillHints(java.lang.String) for more info about autofill hints.
Constant Value: "name"
AUTOFILL_HINT_PASSWORD
public static final String AUTOFILL_HINT_PASSWORD
Hint indicating that this view can be autofilled with a password.
Can be used with either setAutofillHints(java.lang.String[]) or
android:autofillHint (in which case the
value should be .AUTOFILL_HINT_PASSWORD
See setAutofillHints(java.lang.String) for more info about autofill hints.
Constant Value: "password"
AUTOFILL_HINT_PHONE
public static final String AUTOFILL_HINT_PHONE
Hint indicating that this view can be autofilled with a phone number.
Can be used with either setAutofillHints(java.lang.String[]) or
android:autofillHint (in which case the
value should be .AUTOFILL_HINT_PHONE
See setAutofillHints(java.lang.String) for more info about autofill hints.
Constant Value: "phone"
AUTOFILL_HINT_POSTAL_ADDRESS
public static final String AUTOFILL_HINT_POSTAL_ADDRESS
Hint indicating that this view can be autofilled with a postal address.
Can be used with either setAutofillHints(java.lang.String[]) or
android:autofillHint (in which case the
value should be .AUTOFILL_HINT_POSTAL_ADDRESS
See setAutofillHints(java.lang.String) for more info about autofill hints.
Constant Value: "postalAddress"
AUTOFILL_HINT_POSTAL_CODE
public static final String AUTOFILL_HINT_POSTAL_CODE
Hint indicating that this view can be autofilled with a postal code.
Can be used with either setAutofillHints(java.lang.String[]) or
android:autofillHint (in which case the
value should be .AUTOFILL_HINT_POSTAL_CODE
See setAutofillHints(java.lang.String) for more info about autofill hints.
Constant Value: "postalCode"
AUTOFILL_HINT_USERNAME
public static final String AUTOFILL_HINT_USERNAME
Hint indicating that this view can be autofilled with a username.
Can be used with either setAutofillHints(java.lang.String[]) or
android:autofillHint (in which case the
value should be .AUTOFILL_HINT_USERNAME
See setAutofillHints(java.lang.String) for more info about autofill hints.
Constant Value: "username"
AUTOFILL_TYPE_DATE
public static final int AUTOFILL_TYPE_DATE
Autofill type for a field that contains a date, which is represented by a long representing
the number of milliseconds since the standard base time known as "the epoch", namely
January 1, 1970, 00:00:00 GMT (see Date.getTime().
AutofillValue instances for autofilling a View can be obtained through
AutofillValue.forDate(long), and the values passed to
autofill a View can be fetched through AutofillValue.getDateValue().
See also:
Constant Value: 4 (0x00000004)
AUTOFILL_TYPE_LIST
public static final int AUTOFILL_TYPE_LIST
Autofill type for a selection list field, which is filled by an int
representing the element index inside the list (starting at 0).
AutofillValue instances for autofilling a View can be obtained through
AutofillValue.forList(int), and the value passed to autofill a
View can be fetched through AutofillValue.getListValue().
The available options in the selection list are typically provided by
AssistStructure.ViewNode.getAutofillOptions().
See also:
Constant Value: 3 (0x00000003)
AUTOFILL_TYPE_NONE
public static final int AUTOFILL_TYPE_NONE
Autofill type for views that cannot be autofilled.
Typically used when the view is read-only; for example, a text label.
See also:
Constant Value: 0 (0x00000000)
AUTOFILL_TYPE_TEXT
public static final int AUTOFILL_TYPE_TEXT
Autofill type for a text field, which is filled by a CharSequence.
AutofillValue instances for autofilling a View can be obtained through
AutofillValue.forText(CharSequence), and the value passed to autofill a
View can be fetched through AutofillValue.getTextValue().
See also:
Constant Value: 1 (0x00000001)
AUTOFILL_TYPE_TOGGLE
public static final int AUTOFILL_TYPE_TOGGLE
Autofill type for a togglable field, which is filled by a boolean.
AutofillValue instances for autofilling a View can be obtained through
AutofillValue.forToggle(boolean), and the value passed to autofill a
View can be fetched through AutofillValue.getToggleValue().
See also:
Constant Value: 2 (0x00000002)
CONTENT_SENSITIVITY_AUTO
public static final int CONTENT_SENSITIVITY_AUTO
Content sensitivity is determined by the framework. The framework uses a heuristic to
determine if this view displays sensitive content.
Autofill hints i.e. getAutofillHints() are used in the heuristic
to determine if this view should be considered as a sensitive view.
AUTOFILL_HINT_USERNAME,
AUTOFILL_HINT_PASSWORD,
AUTOFILL_HINT_CREDIT_CARD_NUMBER,
AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE,
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE,
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY,
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH,
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR
are considered sensitive hints by the framework, and the list may include more hints
in the future.
The window hosting a sensitive view will be marked as secure during an active media
projection session. This would be equivalent to applying
WindowManager.LayoutParams.FLAG_SECURE to the window.
See also:
Constant Value: 0 (0x00000000)
CONTENT_SENSITIVITY_NOT_SENSITIVE
public static final int CONTENT_SENSITIVITY_NOT_SENSITIVE
The view doesn't display sensitive content.
See also:
Constant Value: 2 (0x00000002)
CONTENT_SENSITIVITY_SENSITIVE
public static final int CONTENT_SENSITIVITY_SENSITIVE
The view displays sensitive content.
The window hosting a sensitive view will be marked as secure during an active media
projection session. This would be equivalent to applying
WindowManager.LayoutParams.FLAG_SECURE to the window.
See also:
Constant Value: 1 (0x00000001)
DRAG_FLAG_ACCESSIBILITY_ACTION
public static final int DRAG_FLAG_ACCESSIBILITY_ACTION
Flag indicating that the drag was initiated with
AccessibilityNodeInfo.AccessibilityAction.ACTION_DRAG_START. When
startDragAndDrop(android.content.ClipData, android.view.View.DragShadowBuilder, java.lang.Object, int) is called, this
is used by the system to perform a drag without animations.
Constant Value: 1024 (0x00000400)
DRAG_FLAG_GLOBAL
public static final int DRAG_FLAG_GLOBAL
Flag indicating that a drag can cross window boundaries. When
startDragAndDrop(android.content.ClipData, android.view.View.DragShadowBuilder, java.lang.Object, int) is called
with this flag set, all visible applications with targetSdkVersion >=
API 24 will be able to participate
in the drag operation and receive the dragged content.
If this is the only flag set, then the drag recipient will only have access to text data
and intents contained in the ClipData object. Access to URIs contained in the
ClipData is determined by other DRAG_FLAG_GLOBAL_* flags
Constant Value: 256 (0x00000100)
DRAG_FLAG_GLOBAL_PERSISTABLE_URI_PERMISSION
public static final int DRAG_FLAG_GLOBAL_PERSISTABLE_URI_PERMISSION
When this flag is used with DRAG_FLAG_GLOBAL_URI_READ and/or DRAG_FLAG_GLOBAL_URI_WRITE, the URI permission grant can be persisted across device
reboots until explicitly revoked with
Context.revokeUriPermission(Uri, int) Context.revokeUriPermission}.
Constant Value: 64 (0x00000040)
DRAG_FLAG_GLOBAL_PREFIX_URI_PERMISSION
public static final int DRAG_FLAG_GLOBAL_PREFIX_URI_PERMISSION
When this flag is used with DRAG_FLAG_GLOBAL_URI_READ and/or DRAG_FLAG_GLOBAL_URI_WRITE, the URI permission grant applies to any URI that is a prefix
match against the original granted URI.
See also:
Constant Value: 128 (0x00000080)
DRAG_FLAG_GLOBAL_SAME_APPLICATION
public static final int DRAG_FLAG_GLOBAL_SAME_APPLICATION
Flag indicating that a drag can cross window boundaries (within the same application). When
startDragAndDrop(android.content.ClipData, android.view.View.DragShadowBuilder, java.lang.Object, int) is called
with this flag set, only visible windows belonging to the same application (ie. share the
same UID) with targetSdkVersion >= API 24 will be
able to participate in the drag operation and receive the dragged content.
If both DRAG_FLAG_GLOBAL_SAME_APPLICATION and DRAG_FLAG_GLOBAL are set, then
DRAG_FLAG_GLOBAL_SAME_APPLICATION takes precedence and the drag will only go to visible
windows from the same application.
Constant Value: 4096 (0x00001000)
DRAG_FLAG_GLOBAL_URI_READ
public static final int DRAG_FLAG_GLOBAL_URI_READ
When this flag is used with DRAG_FLAG_GLOBAL, the drag recipient will be able to
request read access to the content URI(s) contained in the ClipData object.
See also:
Constant Value: 1 (0x00000001)
DRAG_FLAG_GLOBAL_URI_WRITE
public static final int DRAG_FLAG_GLOBAL_URI_WRITE
When this flag is used with DRAG_FLAG_GLOBAL, the drag recipient will be able to
request write access to the content URI(s) contained in the ClipData object.
See also:
Constant Value: 2 (0x00000002)
DRAG_FLAG_HIDE_CALLING_TASK_ON_DRAG_START
public static final int DRAG_FLAG_HIDE_CALLING_TASK_ON_DRAG_START
Flag indicating that this drag will result in the caller activity's task to be hidden for the
duration of the drag, which means that the source activity will not receive drag events for
the current drag gesture. Only the current
VoiceInteractionService may use this flag.
Constant Value: 16384 (0x00004000)
DRAG_FLAG_OPAQUE
public static final int DRAG_FLAG_OPAQUE
Flag indicating that the drag shadow will be opaque. When
startDragAndDrop(android.content.ClipData, android.view.View.DragShadowBuilder, java.lang.Object, int) is called
with this flag set, the drag shadow will be opaque, otherwise, it will be semitransparent.
Constant Value: 512 (0x00000200)
DRAG_FLAG_START_INTENT_SENDER_ON_UNHANDLED_DRAG
public static final int DRAG_FLAG_START_INTENT_SENDER_ON_UNHANDLED_DRAG
Flag indicating that an unhandled drag should be delegated to the system to be started if no
visible window wishes to handle the drop. When using this flag, the caller must provide
ClipData with an Item that contains an immutable IntentSender to an activity to be launched
(not a broadcast, service, etc). See
ClipData.Item.Builder.setIntentSender(IntentSender).
The system can decide to launch the intent or not based on factors like the current screen
size or windowing mode. If the system does not launch the intent, it will be canceled via the
normal drag and drop flow.
Constant Value: 8192 (0x00002000)
DRAWING_CACHE_QUALITY_AUTO
public static final int DRAWING_CACHE_QUALITY_AUTO
This constant was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware
rendering. For software-rendered snapshots of a small part of the View hierarchy or
individual Views it is recommended to create a Canvas from either a Bitmap or
Picture and call draw(android.graphics.Canvas) on the View. However these
software-rendered usages are discouraged and have compatibility issues with hardware-only
rendering features such as Config.HARDWARE
bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback
reports or unit testing the PixelCopy API is recommended.
Enables automatic quality mode for the drawing cache.
Constant Value: 0 (0x00000000)
DRAWING_CACHE_QUALITY_HIGH
public static final int DRAWING_CACHE_QUALITY_HIGH
This constant was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware
rendering. For software-rendered snapshots of a small part of the View hierarchy or
individual Views it is recommended to create a Canvas from either a Bitmap or
Picture and call draw(android.graphics.Canvas) on the View. However these
software-rendered usages are discouraged and have compatibility issues with hardware-only
rendering features such as Config.HARDWARE
bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback
reports or unit testing the PixelCopy API is recommended.
Enables high quality mode for the drawing cache.
Constant Value: 1048576 (0x00100000)
DRAWING_CACHE_QUALITY_LOW
public static final int DRAWING_CACHE_QUALITY_LOW
This constant was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware
rendering. For software-rendered snapshots of a small part of the View hierarchy or
individual Views it is recommended to create a Canvas from either a Bitmap or
Picture and call draw(android.graphics.Canvas) on the View. However these
software-rendered usages are discouraged and have compatibility issues with hardware-only
rendering features such as Config.HARDWARE
bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback
reports or unit testing the PixelCopy API is recommended.
Enables low quality mode for the drawing cache.
Constant Value: 524288 (0x00080000)
FIND_VIEWS_WITH_CONTENT_DESCRIPTION
public static final int FIND_VIEWS_WITH_CONTENT_DESCRIPTION
Find find views that contain the specified content description.
Constant Value: 2 (0x00000002)
FIND_VIEWS_WITH_TEXT
public static final int FIND_VIEWS_WITH_TEXT
Find views that render the specified text.
Constant Value: 1 (0x00000001)
FOCUSABLE
public static final int FOCUSABLE
This view wants keystrokes.
Use with setFocusable(int) and android:focusable.
Constant Value: 1 (0x00000001)
FOCUSABLES_ALL
public static final int FOCUSABLES_ALL
View flag indicating whether addFocusables(java.util.ArrayList, int, int)
should add all focusable Views regardless if they are focusable in touch mode.
Constant Value: 0 (0x00000000)
FOCUSABLES_TOUCH_MODE
public static final int FOCUSABLES_TOUCH_MODE
View flag indicating whether addFocusables(java.util.ArrayList, int, int)
should add only Views focusable in touch mode.
Constant Value: 1 (0x00000001)
FOCUSABLE_AUTO
public static final int FOCUSABLE_AUTO
This view determines focusability automatically. This is the default.
Use with setFocusable(int) and android:focusable.
Constant Value: 16 (0x00000010)
FOCUS_BACKWARD
public static final int FOCUS_BACKWARD
Use with focusSearch(int). Move focus to the previous selectable
item.
Constant Value: 1 (0x00000001)
FOCUS_DOWN
public static final int FOCUS_DOWN
Use with focusSearch(int). Move focus down.
Constant Value: 130 (0x00000082)
FOCUS_FORWARD
public static final int FOCUS_FORWARD
Use with focusSearch(int). Move focus to the next selectable
item.
Constant Value: 2 (0x00000002)
FOCUS_LEFT
public static final int FOCUS_LEFT
Use with focusSearch(int). Move focus to the left.
Constant Value: 17 (0x00000011)
FOCUS_RIGHT
public static final int FOCUS_RIGHT
Use with focusSearch(int). Move focus to the right.
Constant Value: 66 (0x00000042)
FOCUS_UP
public static final int FOCUS_UP
Use with focusSearch(int). Move focus up.
Constant Value: 33 (0x00000021)
GONE
public static final int GONE
This view is invisible, and it doesn't take any space for layout
purposes. Use with setVisibility(int) and android:visibility.
Constant Value: 8 (0x00000008)
HAPTIC_FEEDBACK_ENABLED
public static final int HAPTIC_FEEDBACK_ENABLED
View flag indicating whether this view should have haptic feedback enabled for events such as long presses.
Constant Value: 268435456 (0x10000000)
IMPORTANT_FOR_ACCESSIBILITY_AUTO
public static final int IMPORTANT_FOR_ACCESSIBILITY_AUTO
Automatically determine whether a view is important for accessibility.
Constant Value: 0 (0x00000000)
IMPORTANT_FOR_ACCESSIBILITY_NO
public static final int IMPORTANT_FOR_ACCESSIBILITY_NO
The view is not important for accessibility.
Constant Value: 2 (0x00000002)
IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS
public static final int IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS
The view is not important for accessibility, nor are any of its descendant views.
Constant Value: 4 (0x00000004)
IMPORTANT_FOR_ACCESSIBILITY_YES
public static final int IMPORTANT_FOR_ACCESSIBILITY_YES
The view is important for accessibility.
Constant Value: 1 (0x00000001)
IMPORTANT_FOR_AUTOFILL_AUTO
public static final int IMPORTANT_FOR_AUTOFILL_AUTO
Automatically determine whether a view is important for autofill.
Constant Value: 0 (0x00000000)
IMPORTANT_FOR_AUTOFILL_NO
public static final int IMPORTANT_FOR_AUTOFILL_NO
The view is not important for autofill, but its children (if any) will be traversed.
Constant Value: 2 (0x00000002)
IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS
public static final int IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS
The view is not important for autofill, and its children (if any) will not be traversed.
Constant Value: 8 (0x00000008)
IMPORTANT_FOR_AUTOFILL_YES
public static final int IMPORTANT_FOR_AUTOFILL_YES
The view is important for autofill, and its children (if any) will be traversed.
Constant Value: 1 (0x00000001)
IMPORTANT_FOR_AUTOFILL_YES_EXCLUDE_DESCENDANTS
public static final int IMPORTANT_FOR_AUTOFILL_YES_EXCLUDE_DESCENDANTS
The view is important for autofill, but its children (if any) will not be traversed.
Constant Value: 4 (0x00000004)
IMPORTANT_FOR_CONTENT_CAPTURE_AUTO
public static final int IMPORTANT_FOR_CONTENT_CAPTURE_AUTO
Automatically determine whether a view is important for content capture.
Constant Value: 0 (0x00000000)
IMPORTANT_FOR_CONTENT_CAPTURE_NO
public static final int IMPORTANT_FOR_CONTENT_CAPTURE_NO
The view is not important for content capture, but its children (if any) will be traversed.
Constant Value: 2 (0x00000002)
IMPORTANT_FOR_CONTENT_CAPTURE_NO_EXCLUDE_DESCENDANTS
public static final int IMPORTANT_FOR_CONTENT_CAPTURE_NO_EXCLUDE_DESCENDANTS
The view is not important for content capture, and its children (if any) will not be traversed.
Constant Value: 8 (0x00000008)
IMPORTANT_FOR_CONTENT_CAPTURE_YES
public static final int IMPORTANT_FOR_CONTENT_CAPTURE_YES
The view is important for content capture, and its children (if any) will be traversed.
Constant Value: 1 (0x00000001)
IMPORTANT_FOR_CONTENT_CAPTURE_YES_EXCLUDE_DESCENDANTS
public static final int IMPORTANT_FOR_CONTENT_CAPTURE_YES_EXCLUDE_DESCENDANTS
The view is important for content capture, but its children (if any) will not be traversed.
Constant Value: 4 (0x00000004)
INVISIBLE
public static final int INVISIBLE
This view is invisible, but it still takes up space for layout purposes.
Use with setVisibility(int) and android:visibility.
Constant Value: 4 (0x00000004)
KEEP_SCREEN_ON
public static final int KEEP_SCREEN_ON
View flag indicating that the screen should remain on while the
window containing this view is visible to the user. This effectively
takes care of automatically setting the WindowManager's
WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON.
Constant Value: 67108864 (0x04000000)
LAYER_TYPE_HARDWARE
public static final int LAYER_TYPE_HARDWARE
Indicates that the view has a hardware layer. A hardware layer is backed
by a hardware specific texture (generally Frame Buffer Objects or FBO on
OpenGL hardware) and causes the view to be rendered using Android's hardware
rendering pipeline, but only if hardware acceleration is turned on for the
view hierarchy. When hardware acceleration is turned off, hardware layers
behave exactly as software layers.
A hardware layer is useful to apply a specific color filter and/or blending mode and/or translucency to a view and all its children.
A hardware layer can be used to cache a complex view tree into a texture and reduce the complexity of drawing operations. For instance, when animating a complex view tree with a translation, a hardware layer can be used to render the view tree only once.
A hardware layer can also be used to increase the rendering quality when rotation transformations are applied on a view. It can also be used to prevent potential clipping issues when applying 3D transforms on a view.
Constant Value: 2 (0x00000002)
LAYER_TYPE_NONE
public static final int LAYER_TYPE_NONE
Indicates that the view does not have a layer.
See also:
Constant Value: 0 (0x00000000)
LAYER_TYPE_SOFTWARE
public static final int LAYER_TYPE_SOFTWARE
Indicates that the view has a software layer. A software layer is backed by a bitmap and causes the view to be rendered using Android's software rendering pipeline, even if hardware acceleration is enabled.
Software layers have various usages:
When the application is not using hardware acceleration, a software layer is useful to apply a specific color filter and/or blending mode and/or translucency to a view and all its children.
When the application is using hardware acceleration, a software layer is useful to render drawing primitives not supported by the hardware accelerated pipeline. It can also be used to cache a complex view tree into a texture and reduce the complexity of drawing operations. For instance, when animating a complex view tree with a translation, a software layer can be used to render the view tree only once.
Software layers should be avoided when the affected view tree updates often. Every update will require to re-render the software layer, which can potentially be slow (particularly when hardware acceleration is turned on since the layer will have to be uploaded into a hardware texture after every update.)
Constant Value: 1 (0x00000001)
LAYOUT_DIRECTION_INHERIT
public static final int LAYOUT_DIRECTION_INHERIT
Horizontal layout direction of this view is inherited from its parent.
Use with setLayoutDirection(int).
Constant Value: 2 (0x00000002)
LAYOUT_DIRECTION_LOCALE
public static final int LAYOUT_DIRECTION_LOCALE
Horizontal layout direction of this view is from deduced from the default language
script for the locale. Use with setLayoutDirection(int).
Constant Value: 3 (0x00000003)
LAYOUT_DIRECTION_LTR
public static final int LAYOUT_DIRECTION_LTR
Horizontal layout direction of this view is from Left to Right.
Use with setLayoutDirection(int).
Constant Value: 0 (0x00000000)
LAYOUT_DIRECTION_RTL
public static final int LAYOUT_DIRECTION_RTL
Horizontal layout direction of this view is from Right to Left.
Use with setLayoutDirection(int).
Constant Value: 1 (0x00000001)
MEASURED_HEIGHT_STATE_SHIFT
public static final int MEASURED_HEIGHT_STATE_SHIFT
Bit shift of MEASURED_STATE_MASK to get to the height bits
for functions that combine both width and height into a single int,
such as getMeasuredState() and the childState argument of
resolveSizeAndState(int, int, int).
Constant Value: 16 (0x00000010)
MEASURED_SIZE_MASK
public static final int MEASURED_SIZE_MASK
Bits of getMeasuredWidthAndState() and
getMeasuredWidthAndState() that provide the actual measured size.
Constant Value: 16777215 (0x00ffffff)
MEASURED_STATE_MASK
public static final int MEASURED_STATE_MASK
Bits of getMeasuredWidthAndState() and
getMeasuredWidthAndState() that provide the additional state bits.
Constant Value: -16777216 (0xff000000)
MEASURED_STATE_TOO_SMALL
public static final int MEASURED_STATE_TOO_SMALL
Bit of getMeasuredWidthAndState() and
getMeasuredWidthAndState() that indicates the measured size
is smaller that the space the view would like to have.
Constant Value: 16777216 (0x01000000)
NOT_FOCUSABLE
public static final int NOT_FOCUSABLE
This view does not want keystrokes.
Use with setFocusable(int) and android:focusable.
Constant Value: 0 (0x00000000)
NO_ID
public static final int NO_ID
Used to mark a View that has no ID.
Constant Value: -1 (0xffffffff)
OVER_SCROLL_ALWAYS
public static final int OVER_SCROLL_ALWAYS
Always allow a user to over-scroll this view, provided it is a view that can scroll.
Constant Value: 0 (0x00000000)
OVER_SCROLL_IF_CONTENT_SCROLLS
public static final int OVER_SCROLL_IF_CONTENT_SCROLLS
Allow a user to over-scroll this view only if the content is large enough to meaningfully scroll, provided it is a view that can scroll.
Constant Value: 1 (0x00000001)
OVER_SCROLL_NEVER
public static final int OVER_SCROLL_NEVER
Never allow a user to over-scroll this view.
Constant Value: 2 (0x00000002)
REQUESTED_FRAME_RATE_CATEGORY_DEFAULT
public static final float REQUESTED_FRAME_RATE_CATEGORY_DEFAULT
Constant Value: NaN
REQUESTED_FRAME_RATE_CATEGORY_HIGH
public static final float REQUESTED_FRAME_RATE_CATEGORY_HIGH
Constant Value: -4.0
REQUESTED_FRAME_RATE_CATEGORY_LOW
public static final float REQUESTED_FRAME_RATE_CATEGORY_LOW
Constant Value: -2.0
REQUESTED_FRAME_RATE_CATEGORY_NORMAL
public static final float REQUESTED_FRAME_RATE_CATEGORY_NORMAL
Constant Value: -3.0
REQUESTED_FRAME_RATE_CATEGORY_NO_PREFERENCE
public static final float REQUESTED_FRAME_RATE_CATEGORY_NO_PREFERENCE
Constant Value: -1.0
SCREEN_STATE_OFF
public static final int SCREEN_STATE_OFF
Indicates that the screen has changed state and is now off.
See also:
Constant Value: 0 (0x00000000)
SCREEN_STATE_ON
public static final int SCREEN_STATE_ON
Indicates that the screen has changed state and is now on.
See also:
Constant Value: 1 (0x00000001)
SCROLLBARS_INSIDE_INSET
public static final int SCROLLBARS_INSIDE_INSET
The scrollbar style to display the scrollbars inside the padded area, increasing the padding of the view. The scrollbars will not overlap the content area of the view.
Constant Value: 16777216 (0x01000000)
SCROLLBARS_INSIDE_OVERLAY
public static final int SCROLLBARS_INSIDE_OVERLAY
The scrollbar style to display the scrollbars inside the content area, without increasing the padding. The scrollbars will be overlaid with translucency on the view's content.
Constant Value: 0 (0x00000000)
SCROLLBARS_OUTSIDE_INSET
public static final int SCROLLBARS_OUTSIDE_INSET
The scrollbar style to display the scrollbars at the edge of the view, increasing the padding of the view. The scrollbars will only overlap the background, if any.
Constant Value: 50331648 (0x03000000)
SCROLLBARS_OUTSIDE_OVERLAY
public static final int SCROLLBARS_OUTSIDE_OVERLAY
The scrollbar style to display the scrollbars at the edge of the view, without increasing the padding. The scrollbars will be overlaid with translucency.
Constant Value: 33554432 (0x02000000)
SCROLLBAR_POSITION_DEFAULT
public static final int SCROLLBAR_POSITION_DEFAULT
Position the scroll bar at the default position as determined by the system.
Constant Value: 0 (0x00000000)
SCROLLBAR_POSITION_LEFT
public static final int SCROLLBAR_POSITION_LEFT
Position the scroll bar along the left edge.
Constant Value: 1 (0x00000001)
SCROLLBAR_POSITION_RIGHT
public static final int SCROLLBAR_POSITION_RIGHT
Position the scroll bar along the right edge.
Constant Value: 2 (0x00000002)
SCROLL_AXIS_HORIZONTAL
public static final int SCROLL_AXIS_HORIZONTAL
Indicates scrolling along the horizontal axis.
Constant Value: 1 (0x00000001)
SCROLL_AXIS_NONE
public static final int SCROLL_AXIS_NONE
Indicates no axis of view scrolling.
Constant Value: 0 (0x00000000)
SCROLL_AXIS_VERTICAL
public static final int SCROLL_AXIS_VERTICAL
Indicates scrolling along the vertical axis.
Constant Value: 2 (0x00000002)
SCROLL_CAPTURE_HINT_AUTO
public static final int SCROLL_CAPTURE_HINT_AUTO
The content of this view will be considered for scroll capture if scrolling is possible.
Constant Value: 0 (0x00000000)
SCROLL_CAPTURE_HINT_EXCLUDE
public static final int SCROLL_CAPTURE_HINT_EXCLUDE
Explicitly exclude this view as a potential scroll capture target. The system will not
consider it. Mutually exclusive with SCROLL_CAPTURE_HINT_INCLUDE, which this flag
takes precedence over.
Constant Value: 1 (0x00000001)
SCROLL_CAPTURE_HINT_EXCLUDE_DESCENDANTS
public static final int SCROLL_CAPTURE_HINT_EXCLUDE_DESCENDANTS
Explicitly exclude all children of this view as potential scroll capture targets. This view
is unaffected. Note: Excluded children are not considered, regardless of SCROLL_CAPTURE_HINT_INCLUDE.
Constant Value: 4 (0x00000004)
SCROLL_CAPTURE_HINT_INCLUDE
public static final int SCROLL_CAPTURE_HINT_INCLUDE
Explicitly include this view as a potential scroll capture target. When locating a scroll
capture target, this view will be prioritized before others without this flag. Mutually
exclusive with SCROLL_CAPTURE_HINT_EXCLUDE, which takes precedence.
Constant Value: 2 (0x00000002)
SCROLL_INDICATOR_BOTTOM
public static final int SCROLL_INDICATOR_BOTTOM
Scroll indicator direction for the bottom edge of the view.
Constant Value: 2 (0x00000002)
SCROLL_INDICATOR_END
public static final int SCROLL_INDICATOR_END
Scroll indicator direction for the ending edge of the view.
Resolved according to the view's layout direction, see
getLayoutDirection() for more information.
Constant Value: 32 (0x00000020)
SCROLL_INDICATOR_LEFT
public static final int SCROLL_INDICATOR_LEFT
Scroll indicator direction for the left edge of the view.
Constant Value: 4 (0x00000004)
SCROLL_INDICATOR_RIGHT
public static final int SCROLL_INDICATOR_RIGHT
Scroll indicator direction for the right edge of the view.
Constant Value: 8 (0x00000008)
SCROLL_INDICATOR_START
public static final int SCROLL_INDICATOR_START
Scroll indicator direction for the starting edge of the view.
Resolved according to the view's layout direction, see
getLayoutDirection() for more information.
Constant Value: 16 (0x00000010)
SCROLL_INDICATOR_TOP
public static final int SCROLL_INDICATOR_TOP
Scroll indicator direction for the top edge of the view.
Constant Value: 1 (0x00000001)
SOUND_EFFECTS_ENABLED
public static final int SOUND_EFFECTS_ENABLED
View flag indicating whether this view should have sound effects enabled for events such as clicking and touching.
Constant Value: 134217728 (0x08000000)
STATUS_BAR_HIDDEN
public static final int STATUS_BAR_HIDDEN
This constant was deprecated
in API level 15.
Use SYSTEM_UI_FLAG_LOW_PROFILE instead.
Constant Value: 1 (0x00000001)
STATUS_BAR_VISIBLE
public static final int STATUS_BAR_VISIBLE
This constant was deprecated
in API level 15.
Use SYSTEM_UI_FLAG_VISIBLE instead.
Constant Value: 0 (0x00000000)
SYSTEM_UI_FLAG_FULLSCREEN
public static final int SYSTEM_UI_FLAG_FULLSCREEN
This constant was deprecated
in API level 30.
Use WindowInsetsController.hide(int) with Type.statusBars()
instead.
Flag for setSystemUiVisibility(int): View has requested to go
into the normal fullscreen mode so that its content can take over the screen
while still allowing the user to interact with the application.
This has the same visual effect as
WindowManager.LayoutParams.FLAG_FULLSCREEN,
meaning that non-critical screen decorations (such as the status bar) will be
hidden while the user is in the View's window, focusing the experience on
that content. Unlike the window flag, if you are using ActionBar in
overlay mode with Window.FEATURE_ACTION_BAR_OVERLAY, then enabling this flag will also
hide the action bar.
This approach to going fullscreen is best used over the window flag when
it is a transient state -- that is, the application does this at certain
points in its user interaction where it wants to allow the user to focus
on content, but not as a continuous state. For situations where the application
would like to simply stay full screen the entire time (such as a game that
wants to take over the screen), the
window flag
is usually a better approach. The state set here will be removed by the system
in various situations (such as the user moving to another application) like
the other system UI states.
When using this flag, the application should provide some easy facility for the user to go out of it. A common example would be in an e-book reader, where tapping on the screen brings back whatever screen and UI decorations that had been hidden while the user was immersed in reading the book.
See also:
Constant Value: 4 (0x00000004)
SYSTEM_UI_FLAG_HIDE_NAVIGATION
public static final int SYSTEM_UI_FLAG_HIDE_NAVIGATION
This constant was deprecated
in API level 30.
Use WindowInsetsController.hide(int) with Type.navigationBars()
instead.
Flag for setSystemUiVisibility(int): View has requested that the
system navigation be temporarily hidden.
This is an even less obtrusive state than that called for by
SYSTEM_UI_FLAG_LOW_PROFILE; on devices that draw essential navigation controls
(Home, Back, and the like) on screen, SYSTEM_UI_FLAG_HIDE_NAVIGATION will cause
those to disappear. This is useful (in conjunction with the
FLAG_FULLSCREEN and
FLAG_LAYOUT_IN_SCREEN
window flags) for displaying content using every last pixel on the display.
There is a limitation: because navigation controls are so important, the least user
interaction will cause them to reappear immediately. When this happens, both
this flag and SYSTEM_UI_FLAG_FULLSCREEN will be cleared automatically,
so that both elements reappear at the same time.
See also:
Constant Value: 2 (0x00000002)
SYSTEM_UI_FLAG_IMMERSIVE
public static final int SYSTEM_UI_FLAG_IMMERSIVE
This constant was deprecated
in API level 30.
Use WindowInsetsController.BEHAVIOR_DEFAULT instead.
Flag for setSystemUiVisibility(int): View would like to remain interactive when
hiding the navigation bar with SYSTEM_UI_FLAG_HIDE_NAVIGATION. If this flag is
not set, SYSTEM_UI_FLAG_HIDE_NAVIGATION will be force cleared by the system on any
user interaction.
Since this flag is a modifier for SYSTEM_UI_FLAG_HIDE_NAVIGATION, it only
has an effect when used in combination with that flag.
Constant Value: 2048 (0x00000800)
SYSTEM_UI_FLAG_IMMERSIVE_STICKY
public static final int SYSTEM_UI_FLAG_IMMERSIVE_STICKY
This constant was deprecated
in API level 30.
Use WindowInsetsController.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE instead.
Flag for setSystemUiVisibility(int): View would like to remain interactive when
hiding the status bar with SYSTEM_UI_FLAG_FULLSCREEN and/or hiding the navigation
bar with SYSTEM_UI_FLAG_HIDE_NAVIGATION. Use this flag to create an immersive
experience while also hiding the system bars. If this flag is not set,
SYSTEM_UI_FLAG_HIDE_NAVIGATION will be force cleared by the system on any user
interaction, and SYSTEM_UI_FLAG_FULLSCREEN will be force-cleared by the system
if the user swipes from the top of the screen.
When system bars are hidden in immersive mode, they can be revealed temporarily with system gestures, such as swiping from the top of the screen. These transient system bars will overlay app's content, may have some degree of transparency, and will automatically hide after a short timeout.
Since this flag is a modifier for SYSTEM_UI_FLAG_FULLSCREEN and
SYSTEM_UI_FLAG_HIDE_NAVIGATION, it only has an effect when used in combination
with one or both of those flags.
Constant Value: 4096 (0x00001000)
SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
public static final int SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
This constant was deprecated
in API level 30.
For floating windows, use LayoutParams.setFitInsetsTypes(int) with
Type.statusBars() ()}. For non-floating windows that fill the screen, call
Window.setDecorFitsSystemWindows(boolean) with false.
Flag for setSystemUiVisibility(int): View would like its window
to be laid out as if it has requested
SYSTEM_UI_FLAG_FULLSCREEN, even if it currently hasn't. This
allows it to avoid artifacts when switching in and out of that mode, at
the expense that some of its user interface may be covered by screen
decorations when they are shown. You can perform layout of your inner
UI elements to account for non-fullscreen system UI through the
fitSystemWindows(android.graphics.Rect) method.
Note: on displays that have a DisplayCutout, the window may still be placed
differently than if SYSTEM_UI_FLAG_FULLSCREEN was set, if the
window's layoutInDisplayCutoutMode is
LAYOUT_IN_DISPLAY_CUTOUT_MODE_DEFAULT. To avoid this, use either of the other modes.
See also:
Constant Value: 1024 (0x00000400)
SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
public static final int SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
This constant was deprecated
in API level 30.
For floating windows, use LayoutParams.setFitInsetsTypes(int) with
Type.navigationBars(). For non-floating windows that fill the screen, call
Window.setDecorFitsSystemWindows(boolean) with false.
Flag for setSystemUiVisibility(int): View would like its window
to be laid out as if it has requested
SYSTEM_UI_FLAG_HIDE_NAVIGATION, even if it currently hasn't. This
allows it to avoid artifacts when switching in and out of that mode, at
the expense that some of its user interface may be covered by screen
decorations when they are shown. You can perform layout of your inner
UI elements to account for the navigation system UI through the
fitSystemWindows(android.graphics.Rect) method.
Constant Value: 512 (0x00000200)
SYSTEM_UI_FLAG_LAYOUT_STABLE
public static final int SYSTEM_UI_FLAG_LAYOUT_STABLE
This constant was deprecated
in API level 30.
Use WindowInsets.getInsetsIgnoringVisibility(int) instead to retrieve
insets that don't change when system bars change visibility state.
Flag for setSystemUiVisibility(int): When using other layout
flags, we would like a stable view of the content insets given to
fitSystemWindows(android.graphics.Rect). This means that the insets seen there
will always represent the worst case that the application can expect
as a continuous state. In the stock Android UI this is the space for
the system bar, nav bar, and status bar, but not more transient elements
such as an input method.
The stable layout your UI sees is based on the system UI modes you can
switch to. That is, if you specify SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
then you will get a stable layout for changes of the
SYSTEM_UI_FLAG_FULLSCREEN mode; if you specify
SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN and
SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION, then you can transition
to SYSTEM_UI_FLAG_FULLSCREEN and SYSTEM_UI_FLAG_HIDE_NAVIGATION
with a stable layout. (Note that you should avoid using
SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION by itself.)
If you have set the window flag WindowManager.LayoutParams.FLAG_FULLSCREEN
to hide the status bar (instead of using SYSTEM_UI_FLAG_FULLSCREEN),
then a hidden status bar will be considered a "stable" state for purposes
here. This allows your UI to continually hide the status bar, while still
using the system UI flags to hide the action bar while still retaining
a stable layout. Note that changing the window fullscreen flag will never
provide a stable layout for a clean transition.
If you are using ActionBar in
overlay mode with Window.FEATURE_ACTION_BAR_OVERLAY, this flag will also impact the
insets it adds to those given to the application.
Constant Value: 256 (0x00000100)
SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR
public static final int SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR
This constant was deprecated
in API level 30.
Use WindowInsetsController.APPEARANCE_LIGHT_NAVIGATION_BARS instead.
Flag for setSystemUiVisibility(int): Requests the navigation bar to draw in a mode
that is compatible with light navigation bar backgrounds.
For this to take effect, the window must request
FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS but not
FLAG_TRANSLUCENT_NAVIGATION.
See also:
Constant Value: 16 (0x00000010)
SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
public static final int SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
This constant was deprecated
in API level 30.
Use WindowInsetsController.APPEARANCE_LIGHT_STATUS_BARS instead.
Flag for setSystemUiVisibility(int): Requests the status bar to draw in a mode that
is compatible with light status bar backgrounds.
For this to take effect, the window must request
FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS but not
FLAG_TRANSLUCENT_STATUS.
See also:
Constant Value: 8192 (0x00002000)
SYSTEM_UI_FLAG_LOW_PROFILE
public static final int SYSTEM_UI_FLAG_LOW_PROFILE
This constant was deprecated
in API level 30.
Low profile mode is deprecated. Hide the system bars instead if the application
needs to be in a unobtrusive mode. Use WindowInsetsController.hide(int) with
Type.systemBars().
Flag for setSystemUiVisibility(int): View has requested the
system UI to enter an unobtrusive "low profile" mode.
This is for use in games, book readers, video players, or any other "immersive" application where the usual system chrome is deemed too distracting.
In low profile mode, the status bar and/or navigation icons may dim.
See also:
Constant Value: 1 (0x00000001)
SYSTEM_UI_FLAG_VISIBLE
public static final int SYSTEM_UI_FLAG_VISIBLE
This constant was deprecated
in API level 30.
SystemUiVisibility flags are deprecated. Use WindowInsetsController
instead.
Special constant for setSystemUiVisibility(int): View has
requested the system UI (status bar) to be visible (the default).
See also:
Constant Value: 0 (0x00000000)
SYSTEM_UI_LAYOUT_FLAGS
public static final int SYSTEM_UI_LAYOUT_FLAGS
This constant was deprecated
in API level 30.
System UI layout flags are deprecated.
Flags that can impact the layout in relation to system UI.
Constant Value: 1536 (0x00000600)
TEXT_ALIGNMENT_CENTER
public static final int TEXT_ALIGNMENT_CENTER
Center the paragraph, e.g. ALIGN_CENTER.
Use with setTextAlignment(int)
Constant Value: 4 (0x00000004)
TEXT_ALIGNMENT_GRAVITY
public static final int TEXT_ALIGNMENT_GRAVITY
Default for the root view. The gravity determines the text alignment, ALIGN_NORMAL,
ALIGN_CENTER, or ALIGN_OPPOSITE, which are relative to each paragraph's text direction.
Use with setTextAlignment(int)
Constant Value: 1 (0x00000001)
TEXT_ALIGNMENT_INHERIT
public static final int TEXT_ALIGNMENT_INHERIT
Default text alignment. The text alignment of this View is inherited from its parent.
Use with setTextAlignment(int)
Constant Value: 0 (0x00000000)
TEXT_ALIGNMENT_TEXT_END
public static final int TEXT_ALIGNMENT_TEXT_END
Align to the end of the paragraph, e.g. ALIGN_OPPOSITE.
Use with setTextAlignment(int)
Constant Value: 3 (0x00000003)
TEXT_ALIGNMENT_TEXT_START
public static final int TEXT_ALIGNMENT_TEXT_START
Align to the start of the paragraph, e.g. ALIGN_NORMAL.
Use with setTextAlignment(int)
Constant Value: 2 (0x00000002)
TEXT_ALIGNMENT_VIEW_END
public static final int TEXT_ALIGNMENT_VIEW_END
Align to the end of the view, which is ALIGN_RIGHT if the view's resolved
layoutDirection is LTR, and ALIGN_LEFT otherwise.
Use with setTextAlignment(int)
Constant Value: 6 (0x00000006)
TEXT_ALIGNMENT_VIEW_START
public static final int TEXT_ALIGNMENT_VIEW_START
Align to the start of the view, which is ALIGN_LEFT if the view's resolved
layoutDirection is LTR, and ALIGN_RIGHT otherwise.
Use with setTextAlignment(int)
Constant Value: 5 (0x00000005)
TEXT_DIRECTION_ANY_RTL
public static final int TEXT_DIRECTION_ANY_RTL
Text direction is using "any-RTL" algorithm. The paragraph direction is RTL if it contains any strong RTL character, otherwise it is LTR if it contains any strong LTR characters. If there are neither, the paragraph direction is the view's resolved layout direction.
Constant Value: 2 (0x00000002)
TEXT_DIRECTION_FIRST_STRONG
public static final int TEXT_DIRECTION_FIRST_STRONG
Text direction is using "first strong algorithm". The first strong directional character determines the paragraph direction. If there is no strong directional character, the paragraph direction is the view's resolved layout direction.
Constant Value: 1 (0x00000001)
TEXT_DIRECTION_FIRST_STRONG_LTR
public static final int TEXT_DIRECTION_FIRST_STRONG_LTR
Text direction is using "first strong algorithm". The first strong directional character determines the paragraph direction. If there is no strong directional character, the paragraph direction is LTR.
Constant Value: 6 (0x00000006)
TEXT_DIRECTION_FIRST_STRONG_RTL
public static final int TEXT_DIRECTION_FIRST_STRONG_RTL
Text direction is using "first strong algorithm". The first strong directional character determines the paragraph direction. If there is no strong directional character, the paragraph direction is RTL.
Constant Value: 7 (0x00000007)
TEXT_DIRECTION_INHERIT
public static final int TEXT_DIRECTION_INHERIT
Text direction is inherited through ViewGroup
Constant Value: 0 (0x00000000)
TEXT_DIRECTION_LOCALE
public static final int TEXT_DIRECTION_LOCALE
Text direction is coming from the system Locale.
Constant Value: 5 (0x00000005)
TEXT_DIRECTION_LTR
public static final int TEXT_DIRECTION_LTR
Text direction is forced to LTR.
Constant Value: 3 (0x00000003)
TEXT_DIRECTION_RTL
public static final int TEXT_DIRECTION_RTL
Text direction is forced to RTL.
Constant Value: 4 (0x00000004)
VIEW_LOG_TAG
protected static final String VIEW_LOG_TAG
The logging tag used by this class with android.util.Log.
Constant Value: "View"
VISIBLE
public static final int VISIBLE
This view is visible.
Use with setVisibility(int) and android:visibility.
Constant Value: 0 (0x00000000)
Fields
ALPHA
public static final Property<View, Float> ALPHA
A Property wrapper around the alpha functionality handled by the
View.setAlpha(float) and View.getAlpha() methods.
EMPTY_STATE_SET
protected static final int[] EMPTY_STATE_SET
Indicates the view has no states set. States are used with
Drawable to change the drawing of the
view depending on its state.
See also:
ENABLED_FOCUSED_SELECTED_STATE_SET
protected static final int[] ENABLED_FOCUSED_SELECTED_STATE_SET
Indicates the view is enabled, focused and selected.
ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET
protected static final int[] ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET
Indicates the view is enabled, focused, selected and its window has the focus.
ENABLED_FOCUSED_STATE_SET
protected static final int[] ENABLED_FOCUSED_STATE_SET
Indicates the view is enabled and has the focus.
See also:
ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET
protected static final int[] ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET
Indicates the view is enabled, focused and its window has the focus.
ENABLED_SELECTED_STATE_SET
protected static final int[] ENABLED_SELECTED_STATE_SET
Indicates the view is enabled and selected.
See also:
ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET
protected static final int[] ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET
Indicates the view is enabled, selected and its window has the focus.
ENABLED_STATE_SET
protected static final int[] ENABLED_STATE_SET
Indicates the view is enabled. States are used with
Drawable to change the drawing of the
view depending on its state.
See also:
ENABLED_WINDOW_FOCUSED_STATE_SET
protected static final int[] ENABLED_WINDOW_FOCUSED_STATE_SET
Indicates the view is enabled and that its window has focus.
FOCUSED_SELECTED_STATE_SET
protected static final int[] FOCUSED_SELECTED_STATE_SET
Indicates the view is focused and selected.
See also:
FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET
protected static final int[] FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET
Indicates the view is focused, selected and its window has the focus.
FOCUSED_STATE_SET
protected static final int[] FOCUSED_STATE_SET
Indicates the view is focused. States are used with
Drawable to change the drawing of the
view depending on its state.
See also:
FOCUSED_WINDOW_FOCUSED_STATE_SET
protected static final int[] FOCUSED_WINDOW_FOCUSED_STATE_SET
Indicates the view has the focus and that its window has the focus.
PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET
protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET
Indicates the view is pressed, enabled, focused and selected.
PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET
protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET
Indicates the view is pressed, enabled, focused, selected and its window has the focus.
PRESSED_ENABLED_FOCUSED_STATE_SET
protected static final int[] PRESSED_ENABLED_FOCUSED_STATE_SET
Indicates the view is pressed, enabled and focused.
PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET
protected static final int[] PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET
Indicates the view is pressed, enabled, focused and its window has the focus.
PRESSED_ENABLED_SELECTED_STATE_SET
protected static final int[] PRESSED_ENABLED_SELECTED_STATE_SET
Indicates the view is pressed, enabled and selected.
PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET
protected static final int[] PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET
Indicates the view is pressed, enabled, selected and its window has the focus.
PRESSED_ENABLED_STATE_SET
protected static final int[] PRESSED_ENABLED_STATE_SET
Indicates the view is pressed and enabled.
See also:
PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET
protected static final int[] PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET
Indicates the view is pressed, enabled and its window has the focus.
PRESSED_FOCUSED_SELECTED_STATE_SET
protected static final int[] PRESSED_FOCUSED_SELECTED_STATE_SET
Indicates the view is pressed, focused and selected.
PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET
protected static final int[] PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET
Indicates the view is pressed, focused, selected and its window has the focus.
PRESSED_FOCUSED_STATE_SET
protected static final int[] PRESSED_FOCUSED_STATE_SET
Indicates the view is pressed and focused.
See also:
PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET
protected static final int[] PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET
Indicates the view is pressed, focused and its window has the focus.
PRESSED_SELECTED_STATE_SET
protected static final int[] PRESSED_SELECTED_STATE_SET
Indicates the view is pressed and selected.
See also:
PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET
protected static final int[] PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET
Indicates the view is pressed, selected and its window has the focus.
PRESSED_STATE_SET
protected static final int[] PRESSED_STATE_SET
Indicates the view is pressed. States are used with
Drawable to change the drawing of the
view depending on its state.
See also:
PRESSED_WINDOW_FOCUSED_STATE_SET
protected static final int[] PRESSED_WINDOW_FOCUSED_STATE_SET
Indicates the view is pressed and its window has the focus.
ROTATION
public static final Property<View, Float> ROTATION
A Property wrapper around the rotation functionality handled by the
View.setRotation(float) and View.getRotation() methods.
ROTATION_X
public static final Property<View, Float> ROTATION_X
A Property wrapper around the rotationX functionality handled by the
View.setRotationX(float) and View.getRotationX() methods.
ROTATION_Y
public static final Property<View, Float> ROTATION_Y
A Property wrapper around the rotationY functionality handled by the
View.setRotationY(float) and View.getRotationY() methods.
SCALE_X
public static final Property<View, Float> SCALE_X
A Property wrapper around the scaleX functionality handled by the
View.setScaleX(float) and View.getScaleX() methods.
SCALE_Y
public static final Property<View, Float> SCALE_Y
A Property wrapper around the scaleY functionality handled by the
View.setScaleY(float) and View.getScaleY() methods.
SELECTED_STATE_SET
protected static final int[] SELECTED_STATE_SET
Indicates the view is selected. States are used with
Drawable to change the drawing of the
view depending on its state.
See also:
SELECTED_WINDOW_FOCUSED_STATE_SET
protected static final int[] SELECTED_WINDOW_FOCUSED_STATE_SET
Indicates the view is selected and that its window has the focus.
TRANSLATION_X
public static final Property<View, Float> TRANSLATION_X
A Property wrapper around the translationX functionality handled by the
View.setTranslationX(float) and View.getTranslationX() methods.
TRANSLATION_Y
public static final Property<View, Float> TRANSLATION_Y
A Property wrapper around the translationY functionality handled by the
View.setTranslationY(float) and View.getTranslationY() methods.
TRANSLATION_Z
public static final Property<View, Float> TRANSLATION_Z
A Property wrapper around the translationZ functionality handled by the
View.setTranslationZ(float) and View.getTranslationZ() methods.
WINDOW_FOCUSED_STATE_SET
protected static final int[] WINDOW_FOCUSED_STATE_SET
Indicates the view's window has focus. States are used with
Drawable to change the drawing of the
view depending on its state.
See also:
X
public static final Property<View, Float> X
A Property wrapper around the x functionality handled by the
View.setX(float) and View.getX() methods.
Y
public static final Property<View, Float> Y
A Property wrapper around the y functionality handled by the
View.setY(float) and View.getY() methods.
Z
public static final Property<View, Float> Z
A Property wrapper around the z functionality handled by the
View.setZ(float) and View.getZ() methods.
Public constructors
View
public View (Context context)
Simple constructor to use when creating a view from code.
| Parameters | |
|---|---|
context |
Context: The Context the view is running in, through which it can
access the current theme, resources, etc. |
View
public View (Context context, AttributeSet attrs)
Constructor that is called when inflating a view from XML. This is called when a view is being constructed from an XML file, supplying attributes that were specified in the XML file. This version uses a default style of 0, so the only attribute values applied are those in the Context's Theme and the given AttributeSet.
The method onFinishInflate() will be called after all children have been added.
| Parameters | |
|---|---|
context |
Context: The Context the view is running in, through which it can
access the current theme, resources, etc. |
attrs |
AttributeSet: The attributes of the XML tag that is inflating the view.
This value may be null. |
See also:
View
public View (Context context, AttributeSet attrs, int defStyleAttr)
Perform inflation from XML and apply a class-specific base style from a
theme attribute. This constructor of View allows subclasses to use their
own base style when they are inflating. For example, a Button class's
constructor would call this version of the super class constructor and
supply R.attr.buttonStyle for defStyleAttr; this
allows the theme's button style to modify all of the base view attributes
(in particular its background) as well as the Button class's attributes.
| Parameters | |
|---|---|
context |
Context: The Context the view is running in, through which it can
access the current theme, resources, etc. |
attrs |
AttributeSet: The attributes of the XML tag that is inflating the view.
This value may be null. |
defStyleAttr |
int: An attribute in the current theme that contains a
reference to a style resource that supplies default values for
the view. Can be 0 to not look for defaults. |
See also:
View
public View (Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)
Perform inflation from XML and apply a class-specific base style from a theme attribute or style resource. This constructor of View allows subclasses to use their own base style when they are inflating.
When determining the final value of a particular attribute, there are four inputs that come into play:
- Any attribute values in the given AttributeSet.
- The style resource specified in the AttributeSet (named "style").
- The default style specified by defStyleAttr.
- The default style specified by defStyleRes.
- The base values in this theme.
Each of these inputs is considered in-order, with the first listed taking
precedence over the following ones. In other words, if in the
AttributeSet you have supplied <Button * textColor="#ff000000">
, then the button's text will always be black, regardless of
what is specified in any of the styles.
| Parameters | |
|---|---|
context |
Context: The Context the view is running in, through which it can
access the current theme, resources, etc. |
attrs |
AttributeSet: The attributes of the XML tag that is inflating the view.
This value may be null. |
defStyleAttr |
int: An attribute in the current theme that contains a
reference to a style resource that supplies default values for
the view. Can be 0 to not look for defaults. |
defStyleRes |
int: A resource identifier of a style resource that
supplies default values for the view, used only if
defStyleAttr is 0 or can not be found in the theme. Can be 0
to not look for defaults. |
See also:
Public methods
addChildrenForAccessibility
public void addChildrenForAccessibility (ArrayList<View> outChildren)
Adds the children of this View relevant for accessibility to the given list as output. Since some Views are not important for accessibility the added child views are not necessarily direct children of this view, rather they are the first level of descendants important for accessibility.
| Parameters | |
|---|---|
outChildren |
ArrayList: The output list that will receive children for accessibility. |
addExtraDataToAccessibilityNodeInfo
public void addExtraDataToAccessibilityNodeInfo (AccessibilityNodeInfo info, String extraDataKey, Bundle arguments)
Adds extra data to an AccessibilityNodeInfo based on an explicit request for the
additional data.
This method only needs overloading if the node is marked as having extra data available.
| Parameters | |
|---|---|
info |
AccessibilityNodeInfo: The info to which to add the extra data. Never null. |
extraDataKey |
String: A key specifying the type of extra data to add to the info. The
extra data should be added to the Bundle returned by
the info's AccessibilityNodeInfo.getExtras method. Never
null. |
arguments |
Bundle: A Bundle holding any arguments relevant for this request. May be
null if the service provided no arguments. |
addFocusables
public void addFocusables (ArrayList<View> views, int direction)
Add any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views. If we are in touch mode, only add views that are also focusable in touch mode.
| Parameters | |
|---|---|
views |
ArrayList: Focusable views found so far |
direction |
int: The direction of the focus
Value is FOCUS_BACKWARD, FOCUS_FORWARD, FOCUS_LEFT, FOCUS_UP, FOCUS_RIGHT, or FOCUS_DOWN |
addFocusables
public void addFocusables (ArrayList<View> views, int direction, int focusableMode)
Adds any focusable views that are descendants of this view (possibly including this view if it is focusable itself) to views. This method adds all focusable views regardless if we are in touch mode or only views focusable in touch mode if we are in touch mode or only views that can take accessibility focus if accessibility is enabled depending on the focusable mode parameter.
| Parameters | |
|---|---|
views |
ArrayList: Focusable views found so far or null if all we are interested is
the number of focusables. |
direction |
int: The direction of the focus.
Value is FOCUS_BACKWARD, FOCUS_FORWARD, FOCUS_LEFT, FOCUS_UP, FOCUS_RIGHT, or FOCUS_DOWN |
focusableMode |
int: The type of focusables to be added.
Value is either 0 or a combination of FOCUSABLES_ALL, and FOCUSABLES_TOUCH_MODE |
See also:
addKeyboardNavigationClusters
public void addKeyboardNavigationClusters (Collection<View> views, int direction)
Adds any keyboard navigation cluster roots that are descendants of this view (possibly including this view if it is a cluster root itself) to views.
| Parameters | |
|---|---|
views |
Collection: Keyboard navigation cluster roots found so far
This value cannot be null. |
direction |
int: Direction to look |
addOnAttachStateChangeListener
public void addOnAttachStateChangeListener (View.OnAttachStateChangeListener listener)
Add a listener for attach state changes.
This listener will be called whenever this view is attached or detached
from a window. Remove the listener using
removeOnAttachStateChangeListener(android.view.View.OnAttachStateChangeListener).
| Parameters | |
|---|---|
listener |
View.OnAttachStateChangeListener: Listener to attach |
addOnLayoutChangeListener
public void addOnLayoutChangeListener (View.OnLayoutChangeListener listener)
Add a listener that will be called when the bounds of the view change due to layout processing.
| Parameters | |
|---|---|
listener |
View.OnLayoutChangeListener: The listener that will be called when layout bounds change. |
addOnUnhandledKeyEventListener
public void addOnUnhandledKeyEventListener (View.OnUnhandledKeyEventListener listener)
Adds a listener which will receive unhandled KeyEvents. This must be called on the
UI thread.
| Parameters | |
|---|---|
listener |
View.OnUnhandledKeyEventListener: a receiver of unhandled KeyEvents. |
addTouchables
public void addTouchables (ArrayList<View> views)
Add any touchable views that are descendants of this view (possibly including this view if it is touchable itself) to views.
| Parameters | |
|---|---|
views |
ArrayList: Touchable views found so far |
animate
public ViewPropertyAnimator animate ()
This method returns a ViewPropertyAnimator object, which can be used to animate specific properties on this View.
| Returns | |
|---|---|
ViewPropertyAnimator |
ViewPropertyAnimator The ViewPropertyAnimator associated with this View. |
announceForAccessibility
public void announceForAccessibility (CharSequence text)
This method was deprecated
in API level 36.
Use one of the methods described in the documentation above to semantically
describe UI instead of using an announcement, as accessibility services may choose to
ignore events dispatched with this method.
Convenience method for sending a AccessibilityEvent.TYPE_ANNOUNCEMENT AccessibilityEvent to suggest that an accessibility service announce the specified text to
its users.
Note: The event generated with this API carries no semantic meaning, and accessibility services may choose to ignore it. Apps that accurately supply accessibility with the semantics of their UI should not need to specify what exactly is announced.
In general, do not attempt to generate announcements as confirmation message for simple actions like a button press. Label your controls concisely and precisely instead.
To convey significant UI changes like window changes, use Activity.setTitle(CharSequence) and setAccessibilityPaneTitle(java.lang.CharSequence).
Use setAccessibilityLiveRegion(int) to inform the user of changes to critical
views within the user interface. These should still be used sparingly as they may generate
announcements every time a View is updated.
Use setStateDescription(java.lang.CharSequence) to convey state changes to views within the
user interface. While a live region may send different types of events generated by the view,
state description will send AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED events of
type AccessibilityEvent.CONTENT_CHANGE_TYPE_STATE_DESCRIPTION.
For notifying users about errors, such as in a login screen with text that displays an
"incorrect password" notification, set AccessibilityNodeInfo.setError(CharSequence)
and dispatch an AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED event with a change
type of AccessibilityEvent.CONTENT_CHANGE_TYPE_ERROR, instead. Some widgets may
expose methods that convey error states to accessibility automatically, such as TextView.setError(CharSequence), which manages these accessibility semantics
and event dispatch for callers.
| Parameters | |
|---|---|
text |
CharSequence: The announcement text. |
autofill
public void autofill (AutofillValue value)
Automatically fills the content of this view with the value.
Views support the Autofill Framework mainly by:
- Providing the metadata defining what the view means and how it can be autofilled.
- Implementing the methods that autofill the view.
onProvideAutofillStructure(android.view.ViewStructure, int) is responsible for the former,
this method is responsible for latter.
This method does nothing by default, but when overridden it typically:
- Checks if the provided value matches the expected type (which is defined by
getAutofillType()). - Checks if the view is editable - if it isn't, it should return right away.
- Call the proper getter method on
AutofillValueto fetch the actual value. - Pass the actual value to the equivalent setter in the view.
For example, a text-field view could implement the method this way:
@Override
public void autofill(AutofillValue value) {
if (!value.isText() || !this.isEditable()) {
return;
}
CharSequence text = value.getTextValue();
if (text != null) {
this.setText(text);
}
}
If the value is updated asynchronously, the next call to
AutofillManager.notifyValueChanged(View) must happen after the value was
changed to the autofilled value. If not, the view will not be considered autofilled.
Note: After this method is called, the value returned by
getAutofillValue() must be equal to the value passed to it, otherwise the
view will not be highlighted as autofilled.
| Parameters | |
|---|---|
value |
AutofillValue: value to be autofilled. |
autofill
public void autofill (SparseArray<AutofillValue> values)
Automatically fills the content of the virtual children within this view.
Views with virtual children support the Autofill Framework mainly by:
- Providing the metadata defining what the virtual children mean and how they can be autofilled.
- Implementing the methods that autofill the virtual children.
onProvideAutofillVirtualStructure(android.view.ViewStructure, int) is responsible for the
former, this method is responsible for the latter - see autofill(android.view.autofill.AutofillValue) and
onProvideAutofillVirtualStructure(android.view.ViewStructure, int) for more info about autofill.
If a child value is updated asynchronously, the next call to
AutofillManager.notifyValueChanged(View, int, AutofillValue) must happen
after the value was changed to the autofilled value. If not, the child will not be
considered autofilled.
Note: To indicate that a virtual view was autofilled,
?android:attr/autofilledHighlight should be drawn over it until the data
changes.
Related XML Attributes:
| Parameters | |
|---|---|
values |
SparseArray: map of values to be autofilled, keyed by virtual child id.
This value cannot be null. |
bringToFront
public void bringToFront ()
Change the view's z order in the tree, so it's on top of other sibling
views. This ordering change may affect layout, if the parent container
uses an order-dependent layout scheme (e.g., LinearLayout). Prior
to Build.VERSION_CODES.KITKAT this
method should be followed by calls to requestLayout() and
View.invalidate() on the view's parent to force the parent to redraw
with the new child ordering.
See also:
buildDrawingCache
public void buildDrawingCache (boolean autoScale)
This method was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware
rendering. For software-rendered snapshots of a small part of the View hierarchy or
individual Views it is recommended to create a Canvas from either a Bitmap or
Picture and call draw(android.graphics.Canvas) on the View. However these
software-rendered usages are discouraged and have compatibility issues with hardware-only
rendering features such as Config.HARDWARE
bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback
reports or unit testing the PixelCopy API is recommended.
Forces the drawing cache to be built if the drawing cache is invalid.
If you call buildDrawingCache() manually without calling
setDrawingCacheEnabled(true), you
should cleanup the cache by calling destroyDrawingCache() afterwards.
Note about auto scaling in compatibility mode: When auto scaling is not enabled, this method will create a bitmap of the same size as this view. Because this bitmap will be drawn scaled by the parent ViewGroup, the result on screen might show scaling artifacts. To avoid such artifacts, you should call this method by setting the auto scaling to true. Doing so, however, will generate a bitmap of a different size than the view. This implies that your application must be able to handle this size.
You should avoid calling this method when hardware acceleration is enabled. If you do not need the drawing cache bitmap, calling this method will increase memory usage and cause the view to be rendered in software once, thus negatively impacting performance.
| Parameters | |
|---|---|
autoScale |
boolean |
See also:
buildDrawingCache
public void buildDrawingCache ()
This method was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware
rendering. For software-rendered snapshots of a small part of the View hierarchy or
individual Views it is recommended to create a Canvas from either a Bitmap or
Picture and call draw(android.graphics.Canvas) on the View. However these
software-rendered usages are discouraged and have compatibility issues with hardware-only
rendering features such as Config.HARDWARE
bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback
reports or unit testing the PixelCopy API is recommended.
Calling this method is equivalent to calling buildDrawingCache(false).
See also:
buildLayer
public void buildLayer ()
Forces this view's layer to be created and this view to be rendered
into its layer. If this view's layer type is set to LAYER_TYPE_NONE,
invoking this method will have no effect.
This method can for instance be used to render a view into its layer before
starting an animation. If this view is complex, rendering into the layer
before starting the animation will avoid skipping frames.
| Throws | |
|---|---|
IllegalStateException |
If this view is not attached to a window |
callOnClick
public boolean callOnClick ()
Directly call any attached OnClickListener. Unlike performClick(),
this only calls the listener, and does not do any associated clicking
actions like reporting an accessibility event.
| Returns | |
|---|---|
boolean |
True there was an assigned OnClickListener that was called, false otherwise is returned. |
canResolveLayoutDirection
public boolean canResolveLayoutDirection ()
Check if layout direction resolution can be done.
| Returns | |
|---|---|
boolean |
true if layout direction resolution can be done otherwise return false. |
canResolveTextAlignment
public boolean canResolveTextAlignment ()
Check if text alignment resolution can be done.
| Returns | |
|---|---|
boolean |
true if text alignment resolution can be done otherwise return false. |
canResolveTextDirection
public boolean canResolveTextDirection ()
Check if text direction resolution can be done.
| Returns | |
|---|---|
boolean |
true if text direction resolution can be done otherwise return false. |
canScrollHorizontally
public boolean canScrollHorizontally (int direction)
Check if this view can be scrolled horizontally in a certain direction.
This is without regard to whether the view is enabled or not, or if it will scroll in response to user input or not.
| Parameters | |
|---|---|
direction |
int: Negative to check scrolling left, positive to check scrolling right. |
| Returns | |
|---|---|
boolean |
true if this view can be scrolled in the specified direction, false otherwise. |
canScrollVertically
public boolean canScrollVertically (int direction)
Check if this view can be scrolled vertically in a certain direction.
This is without regard to whether the view is enabled or not, or if it will scroll in response to user input or not.
| Parameters | |
|---|---|
direction |
int: Negative to check scrolling up, positive to check scrolling down. |
| Returns | |
|---|---|
boolean |
true if this view can be scrolled in the specified direction, false otherwise. |
cancelDragAndDrop
public final void cancelDragAndDrop ()
Cancels an ongoing drag and drop operation.
A DragEvent object with
DragEvent.getAction() value of
DragEvent.ACTION_DRAG_ENDED and
DragEvent.getResult() value of false
will be sent to every
View that received DragEvent.ACTION_DRAG_STARTED
even if they are not currently visible.
This method can be called on any View in the same window as the View on which
startDragAndDrop
was called.
cancelLongPress
public void cancelLongPress ()
Cancels a pending long press. Your subclass can use this if you want the context menu to come up if the user presses and holds at the same place, but you don't want it to come up if they press and then move around enough to cause scrolling.
cancelPendingInputEvents
public final void cancelPendingInputEvents ()
Cancel any deferred high-level input events that were previously posted to the event queue.
Many views post high-level events such as click handlers to the event queue to run deferred in order to preserve a desired user experience - clearing visible pressed states before executing, etc. This method will abort any events of this nature that are currently in flight.
Custom views that generate their own high-level deferred input events should override
onCancelPendingInputEvents() and remove those pending events from the queue.
This will also cancel pending input events for any child views.
Note that this may not be sufficient as a debouncing strategy for clicks in all cases.
This will not impact newer events posted after this call that may occur as a result of
lower-level input events still waiting in the queue. If you are trying to prevent
double-submitted events for the duration of some sort of asynchronous transaction
you should also take other steps to protect against unexpected double inputs e.g. calling
setEnabled(false) and re-enabling the view when
the transaction completes, tracking already submitted transaction IDs, etc.
checkInputConnectionProxy
public boolean checkInputConnectionProxy (View view)
Called by the InputMethodManager
when a view who is not the current
input connection target is trying to make a call on the manager. The
default implementation returns false; you can override this to return
true for certain views if you are performing InputConnection proxying
to them.
| Parameters | |
|---|---|
view |
View: The View that is making the InputMethodManager call. |
| Returns | |
|---|---|
boolean |
Return true to allow the call, false to reject. |
clearAnimation
public void clearAnimation ()
Cancels any animations for this view.
clearFocus
public void clearFocus ()
Called when this view wants to give up focus. If focus is cleared
onFocusChanged(boolean, int, android.graphics.Rect) is called.
Note: When not in touch-mode, the framework will try to give focus to the first focusable View from the top after focus is cleared. Hence, if this View is the first from the top that can take focus, then all callbacks related to clearing focus will be invoked after which the framework will give focus to this view.
clearPendingCredentialRequest
public void clearPendingCredentialRequest ()
Clears the request and callback previously set
through View.setPendingCredentialRequest.
Once this API is invoked, there will be no request fired to CredentialManager
on future view focus events.
clearViewTranslationCallback
public void clearViewTranslationCallback ()
Clear the ViewTranslationCallback from this view.
combineMeasuredStates
public static int combineMeasuredStates (int curState,
int newState)Merge two states as returned by getMeasuredState().
| Parameters | |
|---|---|
curState |
int: The current state as returned from a view or the result
of combining multiple views. |
newState |
int: The new view state to combine. |
| Returns | |
|---|---|
int |
Returns a new integer reflecting the combination of the two states. |
computeScroll
public void computeScroll ()
Called by a parent to request that a child update its values for mScrollX
and mScrollY if necessary. This will typically be done if the child is
animating a scroll using a Scroller
object.
computeSystemWindowInsets
public WindowInsets computeSystemWindowInsets (WindowInsets in, Rect outLocalInsets)
Compute insets that should be consumed by this view and the ones that should propagate to those under it.
| Parameters | |
|---|---|
in |
WindowInsets: Insets currently being processed by this View, likely received as a parameter
to onApplyWindowInsets(android.view.WindowInsets). |
outLocalInsets |
Rect: A Rect that will receive the insets that should be consumed
by this view |
| Returns | |
|---|---|
WindowInsets |
Insets that should be passed along to views under this one |
createAccessibilityNodeInfo
public AccessibilityNodeInfo createAccessibilityNodeInfo ()
Returns an AccessibilityNodeInfo representing this view from the
point of view of an AccessibilityService.
This method is responsible for obtaining an accessibility node info from a
pool of reusable instances and calling
onInitializeAccessibilityNodeInfo(android.view.accessibility.AccessibilityNodeInfo) on this view to
initialize the former.
Note: The client is responsible for recycling the obtained instance by calling
AccessibilityNodeInfo.recycle() to minimize object creation.
| Returns | |
|---|---|
AccessibilityNodeInfo |
A populated AccessibilityNodeInfo. |
See also:
createContextMenu
public void createContextMenu (ContextMenu menu)
Show the context menu for this view. It is not safe to hold on to the
menu after returning from this method.
You should normally not overload this method. Overload
onCreateContextMenu(android.view.ContextMenu) or define an
OnCreateContextMenuListener to add items to the context menu.
| Parameters | |
|---|---|
menu |
ContextMenu: The context menu to populate |
destroyDrawingCache
public void destroyDrawingCache ()
This method was deprecated
in API level 28.
The view drawing cache was largely made obsolete with the introduction of
hardware-accelerated rendering in API 11. With hardware-acceleration, intermediate cache
layers are largely unnecessary and can easily result in a net loss in performance due to the
cost of creating and updating the layer. In the rare cases where caching layers are useful,
such as for alpha animations, setLayerType(int, android.graphics.Paint) handles this with hardware
rendering. For software-rendered snapshots of a small part of the View hierarchy or
individual Views it is recommended to create a Canvas from either a Bitmap or
Picture and call draw(android.graphics.Canvas) on the View. However these
software-rendered usages are discouraged and have compatibility issues with hardware-only
rendering features such as Config.HARDWARE
bitmaps, real-time shadows, and outline clipping. For screenshots of the UI for feedback
reports or unit testing the PixelCopy API is recommended.
Frees the resources used by the drawing cache. If you call
buildDrawingCache() manually without calling
setDrawingCacheEnabled(true), you
should cleanup the cache with this method afterwards.
dispatchApplyWindowInsets
public WindowInsets dispatchApplyWindowInsets (WindowInsets insets)
Request to apply the given window insets to this view or another view in its subtree.
This method should be called by clients wishing to apply insets corresponding to areas obscured by window decorations or overlays. This can include the status and navigation bars, action bars, input methods and more. New inset categories may be added in the future. The method returns the insets provided minus any that were applied by this view or its children.
Clients wishing to provide custom behavior should override the
onApplyWindowInsets(android.view.WindowInsets) method or alternatively provide a
OnApplyWindowInsetsListener via the
setOnApplyWindowInsetsListener
method.
This method replaces the older fitSystemWindows method.
| Parameters | |
|---|---|
insets |
WindowInsets: Insets to apply |
| Returns | |
|---|---|
WindowInsets |
The provided insets minus the insets that were consumed |
dispatchCapturedPointerEvent
public boolean dispatchCapturedPointerEvent (MotionEvent event)
Pass a captured pointer event down to the focused view.
| Parameters | |
|---|---|
event |
MotionEvent: The motion event to be dispatched. |
| Returns | |
|---|---|
boolean |
True if the event was handled by the view, false otherwise. |
dispatchConfigurationChanged
public void dispatchConfigurationChanged (Configuration newConfig)
Dispatch a notification about a resource configuration change down the view hierarchy. ViewGroups should override to route to their children.
| Parameters | |
|---|---|
newConfig |
Configuration: The new resource configuration. |
dispatchCreateViewTranslationRequest
public void dispatchCreateViewTranslationRequest (Map<AutofillId, long[]> viewIds, int[] supportedFormats, TranslationCapability capability, List<ViewTranslationRequest> requests)
Dispatch to collect the ViewTranslationRequests for translation purpose by traversing
the hierarchy when the app requests ui translation. Typically, this method should only be
overridden by subclasses that provide a view hierarchy (such as ViewGroup). Other
classes should override View.onCreateViewTranslationRequest for normal view or
override View.onVirtualViewTranslationResponses for view contains virtual children.
When requested to start the ui translation, the system will call this method to traverse the
view hierarchy to collect ViewTranslationRequests and create a
Translator to translate the requests. All the
ViewTranslationRequests must be added when the traversal is done.
The default implementation calls View.onCreateViewTranslationRequest for normal
view or calls View.onVirtualViewTranslationResponses for view contains virtual
children to build ViewTranslationRequest if the view should be translated.
The view is marked as having transient state so that
recycling of views doesn't prevent the system from attaching the response to it. Therefore,
if overriding this method, you should set or reset the transient state.
| Parameters | |
|---|---|
viewIds |
Map: a map for the view's AutofillId and its virtual child ids or
null if the view doesn't have virtual child that should be translated. The virtual
child ids are the same virtual ids provided by ContentCapture. |
supportedFormats |
int: the supported translation formats. For now, the only possible value
is the TranslationSpec.DATA_FORMAT_TEXT.
This value cannot be null.
Value is TranslationSpec.DATA_FORMAT_TEXT |
capability |
TranslationCapability: a TranslationCapability that holds translation capability.
information, e.g. source spec, target spec.
This value cannot be null. |
requests |
List: fill in with ViewTranslationRequests for translation purpose.
This value cannot be null. |
dispatchDisplayHint
public void dispatchDisplayHint (int hint)
Dispatch a hint about whether this view is displayed. For instance, when a View moves out of the screen, it might receives a display hint indicating the view is not displayed. Applications should not rely on this hint as there is no guarantee that they will receive one.
| Parameters | |
|---|---|
hint |
int: A hint about whether or not this view is displayed:
VISIBLE or INVISIBLE.
Value is VISIBLE, INVISIBLE, or GONE |
dispatchDragEvent
public boolean dispatchDragEvent (DragEvent event)
Detects if this View is enabled and has a drag event listener.
If both are true, then it calls the drag event listener with the
DragEvent it received. If the drag event listener returns
true, then dispatchDragEvent() returns true.
For all other cases, the method calls the
onDragEvent() drag event handler
method and returns its result.
This ensures that a drag event is always consumed, even if the View does not have a drag event listener. However, if the View has a listener and the listener returns true, then onDragEvent() is not called.
| Parameters | |
|---|---|
event |
DragEvent |
| Returns | |
|---|---|
boolean |
|
dispatchDrawableHotspotChanged
public void dispatchDrawableHotspotChanged (float x,
float y)Dispatches drawableHotspotChanged to all of this View's children.
| Parameters | |
|---|---|
x |
float: hotspot x coordinate |
y |
float: hotspot y coordinate |
See also:
dispatchFinishTemporaryDetach
public void dispatchFinishTemporaryDetach ()
Dispatch onFinishTemporaryDetach() to this View and its direct children if this is
a container View.
If you override this method you must call through to the
superclass implementation.
dispatchGenericMotionEvent
public boolean dispatchGenericMotionEvent (MotionEvent event)
Dispatch a generic motion event.
Generic motion events with source class InputDevice.SOURCE_CLASS_POINTER
are delivered to the view under the pointer. All other generic motion events are
delivered to the focused view. Hover events are handled specially and are delivered
to onHoverEvent(android.view.MotionEvent) first.
| Parameters | |
|---|---|
event |
MotionEvent: The motion event to be dispatched. |
| Returns | |
|---|---|
boolean |
True if the event was handled by the view, false otherwise. |
dispatchKeyEvent
public boolean dispatchKeyEvent (KeyEvent event)
Dispatch a key event to the next view on the focus path. This path runs from the top of the view tree down to the currently focused view. If this view has focus, it will dispatch to itself. Otherwise it will dispatch the next node down the focus path. This method also fires any key listeners.
| Parameters | |
|---|---|
event |
KeyEvent: The key event to be dispatched. |
| Returns | |
|---|---|
boolean |
True if the event was handled, false otherwise. |
dispatchKeyEventPreIme
public boolean dispatchKeyEventPreIme (KeyEvent event)
Dispatch a key event before it is processed by any input method associated with the view hierarchy. This can be used to intercept key events in special situations before the IME consumes them; a typical example would be handling the BACK key to update the application's UI instead of allowing the IME to see it and close itself.
| Parameters | |
|---|---|
event |
KeyEvent: The key event to be dispatched. |
| Returns | |
|---|---|
boolean |
True if the event was handled, false otherwise. |
dispatchKeyShortcutEvent
public boolean dispatchKeyShortcutEvent (KeyEvent event)
Dispatches a key shortcut event.
| Parameters | |
|---|---|
event |
KeyEvent: The key event to be dispatched. |
| Returns | |
|---|---|
boolean |
True if the event was handled by the view, false otherwise. |
dispatchNestedFling
public boolean dispatchNestedFling (float velocityX,
float velocityY,
boolean consumed)Dispatch a fling to a nested scrolling parent.
This method should be used to indicate that a nested scrolling child has detected
suitable conditions for a fling. Generally this means that a touch scroll has ended with a
velocity in the direction of scrolling that meets or exceeds
the minimum fling velocity
along a scrollable axis.
If a nested scrolling child view would normally fling but it is at the edge of its own content, it can use this method to delegate the fling to its nested scrolling parent instead. The parent may optionally consume the fling or observe a child fling.
| Parameters | |
|---|---|
velocityX |
float: Horizontal fling velocity in pixels per second |
velocityY |
float: Vertical fling velocity in pixels per second |
consumed |
boolean: true if the child consumed the fling, false otherwise |
| Returns | |
|---|---|
boolean |
true if the nested scrolling parent consumed or otherwise reacted to the fling |
dispatchNestedPreFling
public boolean dispatchNestedPreFling (float velocityX,
float velocityY)Dispatch a fling to a nested scrolling parent before it is processed by this view.
Nested pre-fling events are to nested fling events what touch intercept is to touch
and what nested pre-scroll is to nested scroll. dispatchNestedPreFling
offsets an opportunity for the parent view in a nested fling to fully consume the fling
before the child view consumes it. If this method returns true, a nested
parent view consumed the fling and this view should not scroll as a result.
For a better user experience, only one view in a nested scrolling chain should consume the fling at a time. If a parent view consumed the fling this method will return false. Custom view implementations should account for this in two ways:
- If a custom view is paged and needs to settle to a fixed page-point, do not
call
dispatchNestedPreFling; consume the fling and settle to a valid position regardless. - If a nested parent does consume the fling, this view should not scroll at all, even to settle back to a valid idle position.
Views should also not offer fling velocities to nested parent views along an axis
where scrolling is not currently supported; a ScrollView
should not offer a horizontal fling velocity to its parents since scrolling along that
axis is not permitted and carrying velocity along that motion does not make sense.
| Parameters | |
|---|---|
velocityX< | |