RippleDrawable


public class RippleDrawable
extends LayerDrawable

java.lang.Object
   ↳ android.graphics.drawable.Drawable
     ↳ android.graphics.drawable.LayerDrawable
       ↳ android.graphics.drawable.RippleDrawable


Drawable that shows a ripple effect in response to state changes. The anchoring position of the ripple for a given state may be specified by calling setHotspot(float, float) with the corresponding state attribute identifier.

A touch feedback drawable may contain multiple child layers, including a special mask layer that is not drawn to the screen. A single layer may be set as the mask from XML by specifying its android:id value as R.id.mask. At run time, a single layer may be set as the mask using setId(..., android.R.id.mask) or an existing mask layer may be replaced using setDrawableByLayerId(android.R.id.mask, ...).

 <!-- A red ripple masked against an opaque rectangle. -->
 <ripple android:color="#ffff0000">
   <item android:id="@android:id/mask"
         android:drawable="@android:color/white" />
 </ripple>
 

If a mask layer is set, the ripple effect will be masked against that layer before it is drawn over the composite of the remaining child layers.

If no mask layer is set, the ripple effect is masked against the composite of the child layers.

 <!-- A green ripple drawn atop a black rectangle. -->
 <ripple android:color="#ff00ff00">
   <item android:drawable="@android:color/black" />
 </ripple>

 <!-- A blue ripple drawn atop a drawable resource. -->
 <ripple android:color="#ff0000ff">
   <item android:drawable="@drawable/my_drawable" />
 </ripple>
 

If no child layers or mask is specified and the ripple is set as a View background, the ripple will be drawn atop the first available parent background within the View's hierarchy. In this case, the drawing region may extend outside of the Drawable bounds.

 <!-- An unbounded red ripple. -->
 <ripple android:color="#ffff0000" />
 

Summary

XML attributes

android:color The color to use for ripple effects. 
android:effectColor Secondary color of the ripple effect. 
android:radius The radius of the ripple when fully expanded. 

Inherited XML attributes

android:bottom Bottom inset to apply to the layer. 
android:drawable Drawable used to render the layer. 
android:end End inset to apply to the layer. 
android:gravity Gravity used to align the layer within its container. 
android:height Height of the layer. 
android:id Identifier of the layer. 
android:left Left inset to apply to the layer. 
android:paddingBottom Explicit bottom padding. 
android:paddingEnd Explicit end padding. 
android:paddingLeft Explicit left padding. 
android:paddingMode Indicates how layer padding should affect the bounds of subsequent layers. 
android:paddingRight Explicit right padding. 
android:paddingStart Explicit start padding. 
android:paddingTop Explicit top padding. 
android:right Right inset to apply to the layer. 
android:start Start inset to apply to the layer. 
android:top Top inset to apply to the layer. 
android:width Width of the layer. 

Constants

int RADIUS_AUTO

Radius value that specifies the ripple radius should be computed based on the size of the ripple's container.

Inherited constants

int INSET_UNDEFINED

Value used for undefined start and end insets.

int PADDING_MODE_NEST

Padding mode used to nest each layer inside the padding of the previous layer.

int PADDING_MODE_STACK

Padding mode used to stack each layer directly atop the previous layer.

Public constructors

RippleDrawable(ColorStateList color, Drawable content, Drawable mask)

Creates a new ripple drawable with the specified ripple color and optional content and mask drawables.

Public methods

void applyTheme(Resources.Theme t)

Applies the specified theme to this Drawable and its children.

boolean canApplyTheme()
void draw(Canvas canvas)

Optimized for drawing ripples with a mask layer and optional content.

Drawable.ConstantState getConstantState()

Return a ConstantState instance that holds the shared state of this Drawable.

Rect getDirtyBounds()

Return the drawable's dirty bounds Rect.

ColorStateList getEffectColor()
void getHotspotBounds(Rect outRect)

Populates outRect with the hotspot bounds.

int getOpacity()

This method is deprecated. This method is no longer used in graphics optimizations

void getOutline(Outline outline)

Populates outline with the first available layer outline, excluding the mask layer.

int getRadius()
boolean hasFocusStateSpecified()

Indicates whether this drawable has at least one state spec explicitly specifying R.attr.state_focused.

void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Resources.Theme theme)

Inflate this Drawable from an XML resource optionally styled by a theme.

void invalidateSelf()

Use the current Callback implementation to have this Drawable redrawn.

boolean isStateful()

Indicates whether this drawable will change its appearance based on state.

void jumpToCurrentState()

If this Drawable does transition animations between states, ask that it immediately jump to the current state and skip any active animations.

Drawable mutate()

Make this drawable mutable.

void setColor(ColorStateList color)

Sets the ripple color.

boolean setDrawableByLayerId(int id, Drawable drawable)

Replaces the Drawable for the layer with the given id.

void setEffectColor(ColorStateList color)

Sets the ripple effect color.

void setHotspot(float x, float y)

Specifies the hotspot's location within the drawable.

void setHotspotBounds(int left, int top, int right, int bottom)

Sets the bounds to which the hotspot is constrained, if they should be different from the drawable bounds.

void setPaddingMode(int mode)

Specifies how layer padding should affect the bounds of subsequent layers.

void setRadius(int radius)

Sets the radius in pixels of the fully expanded ripple.

boolean setVisible(boolean visible, boolean restart)

Set whether this Drawable is visible.

Protected methods

void onBoundsChange(Rect bounds)

Override this in your subclass to change appearance if you vary based on the bounds.

boolean onStateChange(int[] stateSet)

Override this in your subclass to change appearance if you recognize the specified state.

Inherited methods

int addLayer(Drawable dr)

Adds a new layer containing the specified drawable to the end of the layer list and returns its index.

void applyTheme(Resources.Theme t)

Applies the specified theme to this Drawable and its children.

boolean canApplyTheme()
void draw(Canvas canvas)

Draw in its bounds (set via setBounds) respecting optional effects such as alpha (set via setAlpha) and color filter (set via setColorFilter).

Drawable findDrawableByLayerId(int id)

Looks for a layer with the given ID and returns its Drawable.

int findIndexByLayerId(int id)

Returns the layer with the specified id.

int getAlpha()

Gets the current alpha value for the drawable.

int getBottomPadding()

Returns the bottom padding in pixels.

int getChangingConfigurations()

Return a mask of the configuration parameters for which this drawable may change, requiring that it be re-created.

Drawable.ConstantState getConstantState()

Return a ConstantState instance that holds the shared state of this Drawable.

Drawable getDrawable(int index)

Returns the drawable for the layer at the specified index.

int getEndPadding()

Returns the end padding in pixels.

void getHotspotBounds(Rect outRect)

Populates outRect with the hotspot bounds.

int getId(int index)

Returns the ID of the specified layer.

int getIntrinsicHeight()

Returns the drawable's intrinsic height.

int getIntrinsicWidth()

Returns the drawable's intrinsic width.

int getLayerGravity(int index)
int getLayerHeight(int index)
int getLayerInsetBottom(int index)
int getLayerInsetEnd(int index)
int getLayerInsetLeft(int index)
int getLayerInsetRight(int index)
int getLayerInsetStart(int index)
int getLayerInsetTop(int index)
int getLayerWidth(int index)
int getLeftPadding()

Returns the left padding in pixels.

int getNumberOfLayers()

Returns the number of layers contained within this layer drawable.

int getOpacity()

This method is deprecated. This method is no longer used in graphics optimizations

void getOutline(Outline outline)

Populates outline with the first available (non-empty) layer outline.

boolean getPadding(Rect padding)

Return in padding the insets suggested by this Drawable for placing content inside the drawable's bounds.

int getPaddingMode()
int getRightPadding()

Returns the right padding in pixels.

int getStartPadding()

Returns the start padding in pixels.

int getTopPadding()

Returns the top padding in pixels.

boolean hasFocusStateSpecified()

Indicates whether this drawable has at least one state spec explicitly specifying R.attr.state_focused.

void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Resources.Theme theme)

Inflate this Drawable from an XML resource optionally styled by a theme.

void invalidateDrawable(Drawable who)

Called when the drawable needs to be redrawn.

boolean isAutoMirrored()

Tells if this Drawable will be automatically mirrored when its layout direction is RTL right-to-left.

boolean isStateful()

Indicates whether this drawable will change its appearance based on state.

void jumpToCurrentState()

If this Drawable does transition animations between states, ask that it immediately jump to the current state and skip any active animations.

Drawable mutate()

Make this drawable mutable.

void onBoundsChange(Rect bounds)

Override this in your subclass to change appearance if you vary based on the bounds.

boolean onLayoutDirectionChanged(int layoutDirection)

Called when the drawable's resolved layout direction changes.

boolean onLevelChange(int level)

Override this in your subclass to change appearance if you vary based on level.

boolean onStateChange(int[] state)

Override this in your subclass to change appearance if you recognize the specified state.

void scheduleDrawable(Drawable who, Runnable what, long when)

A Drawable can call this to schedule the next frame of its animation.

void setAlpha(int alpha)

Specify an alpha value for the drawable.

void setAutoMirrored(boolean mirrored)

Set whether this Drawable is automatically mirrored when its layout direction is RTL (right-to left).

void setColorFilter(ColorFilter colorFilter)

Specify an optional color filter for the drawable.

void setDither(boolean dither)

This method is deprecated. This property is ignored.

void setDrawable(int index, Drawable drawable)

Sets the drawable for the layer at the specified index.

boolean setDrawableByLayerId(int id, Drawable drawable)

Replaces the Drawable for the layer with the given id.

void setHotspot(float x, float y)

Specifies the hotspot's location within the drawable.

void setHotspotBounds(int left, int top, int right, int bottom)

Sets the bounds to which the hotspot is constrained, if they should be different from the drawable bounds.

void setId(int index, int id)

Sets the ID of a layer.

void setLayerGravity(int index, int gravity)

Sets the gravity used to position or stretch the specified layer within its container.

void setLayerHeight(int index, int h)
void setLayerInset(int index, int l, int t, int r, int b)

Specifies the insets in pixels for the drawable at the specified index.

void setLayerInsetBottom(int index, int b)
void setLayerInsetEnd(int index, int e)
void setLayerInsetLeft(int index, int l)
void setLayerInsetRelative(int index, int s, int t, int e, int b)

Specifies the relative insets in pixels for the drawable at the specified index.

void setLayerInsetRight(int index, int r)
void setLayerInsetStart(int index, int s)
void setLayerInsetTop(int index, int t)
void setLayerSize(int index, int w, int h)

Sets an explicit size for the specified layer.

void setLayerWidth(int index, int w)
void setOpacity(int opacity)

Sets the opacity of this drawable directly instead of collecting the states from the layers.

void setPadding(int left, int top, int right, int bottom)

Sets the absolute padding.

void setPaddingMode(int mode)

Specifies how layer padding should affect the bounds of subsequent layers.

void setPaddingRelative(int start, int top, int end, int bottom)

Sets the relative padding.

void setTintBlendMode(BlendMode blendMode)

Specifies a tint blending mode for this drawable.

void setTintList(ColorStateList tint)

Specifies tint color for this drawable as a color state list.

boolean setVisible(boolean visible, boolean restart)

Set whether this Drawable is visible.

void unscheduleDrawable(Drawable who, Runnable what)

A Drawable can call this to unschedule an action previously scheduled with scheduleDrawable(Drawable, Runnable, long).

void applyTheme(Resources.Theme t)

Applies the specified theme to this Drawable and its children.

boolean canApplyTheme()
void clearColorFilter()

Removes the color filter for this drawable.

final Rect copyBounds()

Return a copy of the drawable's bounds in a new Rect.

final void copyBounds(Rect bounds)

Return a copy of the drawable's bounds in the specified Rect (allocated by the caller).

static Drawable createFromPath(String pathName)

Create a drawable from file path name.

static Drawable createFromResourceStream(Resources res, TypedValue value, InputStream is, String srcName, BitmapFactory.Options opts)

This method was deprecated in API level 28. Prefer the version without an Options object.

static Drawable createFromResourceStream(Resources res, TypedValue value, InputStream is, String srcName)

Create a drawable from an inputstream, using the given resources and value to determine density information.

static Drawable createFromStream(InputStream is, String srcName)

Create a drawable from an inputstream

static Drawable createFromXml(Resources r, XmlPullParser parser)

Create a drawable from an XML document.

static Drawable createFromXml(Resources r, XmlPullParser parser, Resources.Theme theme)

Create a drawable from an XML document using an optional Theme.

static Drawable createFromXmlInner(Resources r, XmlPullParser parser, AttributeSet attrs, Resources.Theme theme)

Create a drawable from inside an XML document using an optional Theme.

static Drawable createFromXmlInner(Resources r, XmlPullParser parser, AttributeSet attrs)

Create from inside an XML document.

abstract void draw(Canvas canvas)

Draw in its bounds (set via setBounds) respecting optional effects such as alpha (set via setAlpha) and color filter (set via setColorFilter).

int getAlpha()

Gets the current alpha value for the drawable.

final Rect getBounds()

Return the drawable's bounds Rect.

Drawable.Callback getCallback()

Return the current Callback implementation attached to this Drawable.

int getChangingConfigurations()

Return a mask of the configuration parameters for which this drawable may change, requiring that it be re-created.

ColorFilter getColorFilter()

Returns the current color filter, or null if none set.

Drawable.ConstantState getConstantState()

Return a ConstantState instance that holds the shared state of this Drawable.

Drawable getCurrent()
Rect getDirtyBounds()

Return the drawable's dirty bounds Rect.

void getHotspotBounds(Rect outRect)

Populates outRect with the hotspot bounds.

int getIntrinsicHeight()

Returns the drawable's intrinsic height.

int getIntrinsicWidth()

Returns the drawable's intrinsic width.

int getLayoutDirection()

Returns the resolved layout direction for this Drawable.

final int getLevel()

Retrieve the current level.

int getMinimumHeight()

Returns the minimum height suggested by this Drawable.

int getMinimumWidth()

Returns the minimum width suggested by this Drawable.

abstract int getOpacity()

This method was deprecated in API level 29. This method is no longer used in graphics optimizations

Insets getOpticalInsets()

Return in insets the layout insets suggested by this Drawable for use with alignment operations during layout.

void getOutline(Outline outline)

Called to get the drawable to populate the Outline that defines its drawing area.

boolean getPadding(Rect padding)

Return in padding the insets suggested by this Drawable for placing content inside the drawable's bounds.

int[] getState()

Describes the current state, as a union of primitive states, such as R.attr.state_focused, R.attr.state_selected, etc.

Region getTransparentRegion()

Returns a Region representing the part of the Drawable that is completely transparent.

boolean hasFocusStateSpecified()

Indicates whether this drawable has at least one state spec explicitly specifying R.attr.state_focused.

void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Resources.Theme theme)

Inflate this Drawable from an XML resource optionally styled by a theme.

void inflate(Resources r, XmlPullParser parser, AttributeSet attrs)

Inflate this Drawable from an XML resource.

void invalidateSelf()

Use the current Callback implementation to have this Drawable redrawn.

boolean isAutoMirrored()

Tells if this Drawable will be automatically mirrored when its layout direction is RTL right-to-left.

boolean isFilterBitmap()
boolean isProjected()

Whether this drawable requests projection.

boolean isStateful()

Indicates whether this drawable will change its appearance based on state.

final boolean isVisible()
void jumpToCurrentState()

If this Drawable does transition animations between states, ask that it immediately jump to the current state and skip any active animations.

Drawable mutate()

Make this drawable mutable.

void onBoundsChange(Rect bounds)

Override this in your subclass to change appearance if you vary based on the bounds.

boolean onLayoutDirectionChanged(int layoutDirection)

Called when the drawable's resolved layout direction changes.

boolean onLevelChange(int level)

Override this in your subclass to change appearance if you vary based on level.

boolean onStateChange(int[] state)

Override this in your subclass to change appearance if you recognize the specified state.

static int resolveOpacity(int op1, int op2)

Return the appropriate opacity value for two source opacities.

void scheduleSelf(Runnable what, long when)

Use the current Callback implementation to have this Drawable scheduled.

abstract void setAlpha(int alpha)

Specify an alpha value for the drawable.

void setAutoMirrored(boolean mirrored)

Set whether this Drawable is automatically mirrored when its layout direction is RTL (right-to left).

void setBounds(int left, int top, int right, int bottom)

Specify a bounding rectangle for the Drawable.

void setBounds(Rect bounds)

Specify a bounding rectangle for the Drawable.

final void setCallback(Drawable.Callback cb)

Bind a Callback object to this Drawable.

void setChangingConfigurations(int configs)

Set a mask of the configuration parameters for which this drawable may change, requiring that it be re-created.

void setColorFilter(int color, PorterDuff.Mode mode)

This method was deprecated in API level 29. use setColorFilter(android.graphics.ColorFilter) with an instance of BlendModeColorFilter

abstract void setColorFilter(ColorFilter colorFilter)

Specify an optional color filter for the drawable.

void setDither(boolean dither)

This method was deprecated in API level 23. This property is ignored.

void setFilterBitmap(boolean filter)

Set to true to have the drawable filter its bitmaps with bilinear sampling when they are scaled or rotated.

void setHotspot(float x, float y)

Specifies the hotspot's location within the drawable.

void setHotspotBounds(int left, int top, int right, int bottom)

Sets the bounds to which the hotspot is constrained, if they should be different from the drawable bounds.

final boolean setLayoutDirection(int layoutDirection)

Set the layout direction for this drawable.

final boolean setLevel(int level)

Specify the level for the drawable.

boolean setState(int[] stateSet)

Specify a set of states for the drawable.

void setTint(int tintColor)

Specifies tint color for this drawable.

void setTintBlendMode(BlendMode blendMode)

Specifies a tint blending mode for this drawable.

void setTintList(ColorStateList tint)

Specifies tint color for this drawable as a color state list.

void setTintMode(PorterDuff.Mode tintMode)

Specifies a tint blending mode for this drawable.

boolean setVisible(boolean visible, boolean restart)

Set whether this Drawable is visible.

void unscheduleSelf(Runnable what)

Use the current Callback implementation to have this Drawable unscheduled.

Object clone()

Creates and returns a copy of this object.

boolean equals(Object obj)

Indicates whether some other object is "equal to" this one.

void finalize()

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.

final Class<?> getClass()

Returns the runtime class of this Object.

int hashCode()

Returns a hash code value for the object.

final void notify()

Wakes up a single thread that is waiting on this object's monitor.

final void notifyAll()

Wakes up all threads that are waiting on this object's monitor.

String toString()

Returns a string representation of the object.

final void wait(long timeoutMillis, int nanos)

Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

final void wait(long timeoutMillis)

Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

final void wait()

Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

abstract void invalidateDrawable(Drawable who)

Called when the drawable needs to be redrawn.

abstract void scheduleDrawable(Drawable who, Runnable what, long when)

A Drawable can call this to schedule the next frame of its animation.

abstract void unscheduleDrawable(Drawable who, Runnable what)

A Drawable can call this to unschedule an action previously scheduled with scheduleDrawable(Drawable, Runnable, long).

XML attributes

android:color

The color to use for ripple effects. This attribute is required.

May be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".

Related methods:

android:effectColor

Secondary color of the ripple effect.

May be a color value, in the form of "#rgb", "#argb", "#rrggbb", or "#aarrggbb".

Related methods:

android:radius

The radius of the ripple when fully expanded. By default, the radius is computed based on the size of the ripple's container.

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:

Constants

RADIUS_AUTO

Added in API level 23
public static final int RADIUS_AUTO

Radius value that specifies the ripple radius should be computed based on the size of the ripple's container.

Constant Value: -1 (0xffffffff)

Public constructors

RippleDrawable

Added in API level 21
public RippleDrawable (ColorStateList color, 
                Drawable content, 
                Drawable mask)

Creates a new ripple drawable with the specified ripple color and optional content and mask drawables.

Parameters
color ColorStateList: The ripple color This value cannot be null.

content Drawable: The content drawable, may be null

mask Drawable: The mask drawable, may be null

Public methods

applyTheme

Added in API level 21
public void applyTheme (Resources.Theme t)

Applies the specified theme to this Drawable and its children.

Parameters
t Resources.Theme: This value cannot be null.

canApplyTheme

Added in API level 21
public boolean canApplyTheme ()

Returns
boolean

draw

Added in API level 21
public void draw (Canvas canvas)

Optimized for drawing ripples with a mask layer and optional content.

Parameters
canvas Canvas: This value cannot be null.

getConstantState

Added in API level 21
public Drawable.ConstantState getConstantState ()

Return a ConstantState instance that holds the shared state of this Drawable.

Returns
Drawable.ConstantState The ConstantState associated to that Drawable. This value may be null.

getDirtyBounds

Added in API level 21
public Rect getDirtyBounds ()

Return the drawable's dirty bounds Rect. Note: for efficiency, the returned object may be the same object stored in the drawable (though this is not guaranteed).

By default, this returns the full drawable bounds. Custom drawables may override this method to perform more precise invalidation.

Returns
Rect The dirty bounds of this drawable This value cannot be null.

getEffectColor

Added in API level 31
public ColorStateList getEffectColor ()

Returns
ColorStateList The ripple effect color as a color state list. This value cannot be null.

getHotspotBounds

Added in API level 23
public void getHotspotBounds (Rect outRect)

Populates outRect with the hotspot bounds.

Parameters
outRect Rect: the rect to populate with the hotspot bounds This value cannot be null.

getOpacity

Added in API level 21
public int getOpacity ()

This method is deprecated.
This method is no longer used in graphics optimizations

Return the opacity/transparency of this Drawable. The returned value is one of the abstract format constants in PixelFormat: PixelFormat.UNKNOWN, PixelFormat.TRANSLUCENT, PixelFormat.TRANSPARENT, or PixelFormat.OPAQUE.

An OPAQUE drawable is one that draws all all content within its bounds, completely covering anything behind the drawable. A TRANSPARENT drawable is one that draws nothing within its bounds, allowing everything behind it to show through. A TRANSLUCENT drawable is a drawable in any other state, where the drawable will draw some, but not all, of the content within its bounds and at least some content behind the drawable will be visible. If the visibility of the drawable's contents cannot be determined, the safest/best return value is TRANSLUCENT.

Generally a Drawable should be as conservative as possible with the value it returns. For example, if it contains multiple child drawables and only shows one of them at a time, if only one of the children is TRANSLUCENT and the others are OPAQUE then TRANSLUCENT should be returned. You can use the method resolveOpacity(int, int) to perform a standard reduction of two opacities to the appropriate single output.

Note that the returned value does not necessarily take into account a custom alpha or color filter that has been applied by the client through the setAlpha(int) or setColorFilter(ColorFilter) methods. Some subclasses, such as BitmapDrawable, ColorDrawable, and GradientDrawable, do account for the value of setAlpha(int), but the general behavior is dependent upon the implementation of the subclass.

Returns
int int The opacity class of the Drawable. Value is PixelFormat.UNKNOWN, PixelFormat.TRANSLUCENT, PixelFormat.TRANSPARENT, or PixelFormat.OPAQUE

getOutline

Added in API level 21
public void getOutline (Outline outline)

Populates outline with the first available layer outline, excluding the mask layer.

Parameters
outline Outline: Outline in which to place the first available layer outline This value cannot be null.

getRadius

Added in API level 23
public int getRadius ()

Related XML Attributes:

Returns
int the radius in pixels of the fully expanded ripple if an explicit radius has been set, or RADIUS_AUTO if the radius is computed based on the container size

hasFocusStateSpecified

Added in API level 31
public boolean hasFocusStateSpecified ()

Indicates whether this drawable has at least one state spec explicitly specifying R.attr.state_focused.

Note: A View uses a Drawable instance as its background and it changes its appearance based on a state. On keyboard devices, it should specify its R.attr.state_focused to make sure the user knows which view is holding the focus.

Returns
boolean true if R.attr.state_focused is specified for this drawable.

inflate

Added in API level 21
public void inflate (Resources r, 
                XmlPullParser parser, 
                AttributeSet attrs, 
                Resources.Theme theme)

Inflate this Drawable from an XML resource optionally styled by a theme. This can't be called more than once for each Drawable. Note that framework may have called this once to create the Drawable instance from XML resource.

Parameters
r Resources: This value cannot be null.

parser XmlPullParser: This value cannot be null.

attrs AttributeSet: This value cannot be null.

theme Resources.Theme: This value may be null.

invalidateSelf

Added in API level 21
public void invalidateSelf ()

Use the current Callback implementation to have this Drawable redrawn. Does nothing if there is no Callback attached to the Drawable.

isStateful

Added in API level 21
public boolean isStateful ()

Indicates whether this drawable will change its appearance based on state. Clients can use this to determine whether it is necessary to calculate their state and call setState.

Returns
boolean True if this drawable changes its appearance based on state, false otherwise.

jumpToCurrentState

Added in API level 21
public void jumpToCurrentState ()

If this Drawable does transition animations between states, ask that it immediately jump to the current state and skip any active animations.

mutate

Added in API level 21
public Drawable mutate ()

Make this drawable mutable. This operation cannot be reversed. A mutable drawable is guaranteed to not share its state with any other drawable. This is especially useful when you need to modify properties of drawables loaded from resources. By default, all drawables instances loaded from the same resource share a common state; if you modify the state of one instance, all the other instances will receive the same modification. Calling this method on a mutable Drawable will have no effect.

Returns
Drawable This drawable. This value cannot be null.

setColor

Added in API level 21
public void setColor (ColorStateList color)

Sets the ripple color.

Related XML Attributes:

Parameters
color ColorStateList: Ripple color as a color state list. This value cannot be null.

setDrawableByLayerId

Added in API level 21
public boolean setDrawableByLayerId (int id, 
                Drawable drawable)

Replaces the Drawable for the layer with the given id.

Parameters
id int: The layer ID to search for.

drawable Drawable: The replacement Drawable.

Returns
boolean Whether the Drawable was replaced (could return false if the id was not found).

setEffectColor

Added in API level 31
public void setEffectColor (ColorStateList color)

Sets the ripple effect color.

Related XML Attributes:

Parameters
color ColorStateList: Ripple color as a color state list. This value cannot be null.

setHotspot

Added in API level 21
public void setHotspot (float x, 
                float y)

Specifies the hotspot's location within the drawable.

Parameters
x float: The X coordinate of the center of the hotspot

y float: The Y coordinate of the center of the hotspot

setHotspotBounds

Added in API level 21
public void setHotspotBounds (int left, 
                int top, 
                int right, 
                int bottom)

Sets the bounds to which the hotspot is constrained, if they should be different from the drawable bounds.

Parameters
left int: position in pixels of the left bound

top int: position in pixels of the top bound

right int: position in pixels of the right bound

bottom int: position in pixels of the bottom bound

setPaddingMode

Added in API level 21
public void setPaddingMode (int mode)

Specifies how layer padding should affect the bounds of subsequent layers. The default and recommended value for RippleDrawable is LayerDrawable.PADDING_MODE_STACK.

Parameters
mode int: padding mode, one of:

setRadius

Added in API level 23
public void setRadius (int radius)

Sets the radius in pixels of the fully expanded ripple.

Related XML Attributes:

Parameters
radius int: ripple radius in pixels, or RADIUS_AUTO to compute the radius based on the container size

setVisible

Added in API level 21
public boolean setVisible (boolean visible, 
                boolean restart)

Set whether this Drawable is visible. This generally does not impact the Drawable's behavior, but is a hint that can be used by some Drawables, for example, to decide whether run animations.

Parameters
visible boolean: Set to true if visible, false if not.

restart boolean: You can supply true here to force the drawable to behave as if it has just become visible, even if it had last been set visible. Used for example to force animations to restart.

Returns
boolean boolean Returns true if the new visibility is different than its previous state.

Protected methods

onBoundsChange

Added in API level 21
protected void onBoundsChange (Rect bounds)

Override this in your subclass to change appearance if you vary based on the bounds.

Parameters
bounds Rect: This value cannot be null.

onStateChange

Added in API level 21
protected boolean onStateChange (int[] stateSet)

Override this in your subclass to change appearance if you recognize the specified state.

Parameters
stateSet int: This value cannot be null.

Returns
boolean Returns true if the state change has caused the appearance of the Drawable to change (that is, it needs to be drawn), else false if it looks the same and there is no need to redraw it since its last state.