Added in API level 1

LayerDrawable

Kotlin |Java

public class LayerDrawable
extends Drawable implements Drawable.Callback

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

Known direct subclasses

RippleDrawable, TransitionDrawable

RippleDrawable	Drawable that shows a ripple effect in response to state changes.
TransitionDrawable	An extension of LayerDrawables that is intended to cross-fade between the first and second layer.

A Drawable that manages an array of other Drawables. These are drawn in array order, so the element with the largest index will be drawn on top.

It can be defined in an XML file with the <layer-list> element. Each Drawable in the layer is defined in a nested <item>.

For more information, see the guide to Drawable Resources.

Summary

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`	`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
`LayerDrawable(Drawable[] layers)` Creates a new layer drawable with the list of specified layers.

Public 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.
`boolean`	`onLayoutDirectionChanged(int layoutDirection)` Called when the drawable's resolved layout direction changes.
`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)`.

Protected methods
`void`	`onBoundsChange(Rect bounds)` Override this in your subclass to change appearance if you vary based on the bounds.
`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.

Inherited methods

From class


        
          android.graphics.drawable.Drawable

`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.

From class


        
          java.lang.Object

`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.

From interface


        
          android.graphics.drawable.Drawable.Callback

`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:bottom

Bottom inset to apply to the layer.

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:

setLayerInsetRelative(int,int,int,int,int)

android:drawable

Drawable used to render the layer.

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:

setDrawable(int,Drawable)

android:end

End inset to apply to the layer. Overrides left or right depending on layout direction.

Related methods:

setLayerInsetRelative(int,int,int,int,int)

android:gravity

Gravity used to align the layer within its container. If no value is specified, the default behavior depends on whether an explicit width or height has been set, If no dimension is set, gravity in that direction defaults to fill_horizontal or fill_vertical; otherwise, it defaults to left or top.

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.
end	800005	Push object to the end of its container, not changing its size.
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.
start	800003	Push object to the beginning of its container, not changing its size.
top	30	Push object to the top of its container, not changing its size.

Related methods:

setLayerGravity(int,int)

android:height

Height of the layer. Defaults to the layer's intrinsic height.

Related methods:

setLayerSize(int,int,int)

android:id

Identifier of the layer. This can be used to retrieve the layer from a drawable container.

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:

setId(int,int)

android:left

Left inset to apply to the layer.

Related methods:

setLayerInsetLeft(int,int)

android:paddingBottom

Explicit bottom padding. Overrides child padding.

Related methods:

setPaddingRelative(int,int,int,int)

android:paddingEnd

Explicit end padding. Overrides child padding. Takes precedence over absolute padding (for example, right when layout direction is LTR).

Related methods:

setPaddingRelative(int,int,int,int)

android:paddingLeft

Explicit left padding. Overrides child padding.

Related methods:

setPadding(int,int,int,int)

android:paddingMode

Indicates how layer padding should affect the bounds of subsequent layers. The default padding mode value is nest.

Must be one of the following constant values.

Constant	Value	Description
nest	0	Nest each layer inside the padding of the previous layer.
stack	1	Stack each layer directly atop the previous layer.

Related methods:

setPaddingMode(int)

android:paddingRight

Explicit right padding. Overrides child padding.

Related methods:

setPadding(int,int,int,int)

android:paddingStart

Explicit start padding. Overrides child padding. Takes precedence over absolute padding (for example, left when layout direction is LTR).

Related methods:

setPaddingRelative(int,int,int,int)

android:paddingTop

Explicit top padding. Overrides child padding.

Related methods:

setPaddingRelative(int,int,int,int)

android:right

Right inset to apply to the layer.

Related methods:

setLayerInsetRight(int,int)

android:start

Start inset to apply to the layer. Overrides left or right depending on layout direction.

Related methods:

setLayerInsetStart(int,int)

android:top

Top inset to apply to the layer.

Related methods:

setLayerInsetTop(int,int)

android:width

Width of the layer. Defaults to the layer's intrinsic width.

Related methods:

setLayerWidth(int,int)

Constants

INSET_UNDEFINED

Added in API level 24

public static final int INSET_UNDEFINED

Value used for undefined start and end insets.

See also:

Constant Value: -2147483648 (0x80000000)

PADDING_MODE_NEST

Added in API level 21

public static final int PADDING_MODE_NEST

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

See also:

setPaddingMode(int)

Constant Value: 0 (0x00000000)

PADDING_MODE_STACK

Added in API level 21

public static final int PADDING_MODE_STACK

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

See also:

setPaddingMode(int)

Constant Value: 1 (0x00000001)

Public constructors

LayerDrawable

Added in API level 1

public LayerDrawable (Drawable[] layers)

Creates a new layer drawable with the list of specified layers.

Parameters
`layers`	`Drawable`: a list of drawables to use as layers in this new drawable, must be non-null

Public methods

addLayer

Added in API level 23

public int addLayer (Drawable dr)

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

Parameters
`dr`	`Drawable`: The drawable to add as a new layer.

Returns
`int`	The index of the new layer.

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 1

public 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).

Parameters
`canvas`	`Canvas`: The canvas to draw into This value cannot be `null`.

findDrawableByLayerId

Added in API level 1

public Drawable findDrawableByLayerId (int id)

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

If multiple layers are found for the given ID, returns the Drawable for the matching layer at the highest index.

Parameters
`id`	`int`: The layer ID to search for.

Returns
`Drawable`	The `Drawable` for the highest-indexed layer that has the given ID, or null if not found.

findIndexByLayerId

Added in API level 23

public int findIndexByLayerId (int id)

Returns the layer with the specified id.

If multiple layers have the same ID, returns the layer with the lowest index.

Parameters
`id`	`int`: The ID of the layer to return.

Returns
`int`	The index of the layer with the specified ID.

getAlpha

Added in API level 19

public int getAlpha ()

Gets the current alpha value for the drawable. 0 means fully transparent, 255 means fully opaque. This method is implemented by Drawable subclasses and the value returned is specific to how that class treats alpha. The default return value is 255 if the class does not override this method to return a value specific to its use of alpha.

Returns
`int`	Value is between 0 and 255 inclusive

getBottomPadding

Added in API level 23

public int getBottomPadding ()

Returns the bottom padding in pixels.

A return value of -1 means there is no explicit padding set for this dimension. As a result, the value for this dimension returned by getPadding(android.graphics.Rect) will be computed from the child layers according to the padding mode (see getPaddingMode().

Returns
`int`	the bottom padding in pixels, or -1 if not explicitly specified

See also:

getChangingConfigurations

Added in API level 1

public int getChangingConfigurations ()

Return a mask of the configuration parameters for which this drawable may change, requiring that it be re-created. The default implementation returns whatever was provided through setChangingConfigurations(int) or 0 by default. Subclasses may extend this to or in the changing configurations of any other drawables they hold.

Returns

Returns
`int`	Value is either `0` or a combination of `ActivityInfo.CONFIG_MCC`, `ActivityInfo.CONFIG_MNC`, `ActivityInfo.CONFIG_LOCALE`, `ActivityInfo.CONFIG_TOUCHSCREEN`, `ActivityInfo.CONFIG_KEYBOARD`, `ActivityInfo.CONFIG_KEYBOARD_HIDDEN`, `ActivityInfo.CONFIG_NAVIGATION`, `ActivityInfo.CONFIG_ORIENTATION`, `ActivityInfo.CONFIG_SCREEN_LAYOUT`, `ActivityInfo.CONFIG_UI_MODE`, `ActivityInfo.CONFIG_SCREEN_SIZE`, `ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE`, `ActivityInfo.CONFIG_DENSITY`, `ActivityInfo.CONFIG_LAYOUT_DIRECTION`, `ActivityInfo.CONFIG_COLOR_MODE`, `ActivityInfo.CONFIG_FONT_SCALE`, and `ActivityInfo.CONFIG_GRAMMATICAL_GENDER`

int

Value is either 0 or a combination of ActivityInfo.CONFIG_MCC, ActivityInfo.CONFIG_MNC, ActivityInfo.CONFIG_LOCALE, ActivityInfo.CONFIG_TOUCHSCREEN, ActivityInfo.CONFIG_KEYBOARD, ActivityInfo.CONFIG_KEYBOARD_HIDDEN, ActivityInfo.CONFIG_NAVIGATION, ActivityInfo.CONFIG_ORIENTATION, ActivityInfo.CONFIG_SCREEN_LAYOUT, ActivityInfo.CONFIG_UI_MODE, ActivityInfo.CONFIG_SCREEN_SIZE, ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE, ActivityInfo.CONFIG_DENSITY, ActivityInfo.CONFIG_LAYOUT_DIRECTION, ActivityInfo.CONFIG_COLOR_MODE, ActivityInfo.CONFIG_FONT_SCALE, and ActivityInfo.CONFIG_GRAMMATICAL_GENDER

getConstantState

Added in API level 1

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`.

getDrawable

Added in API level 1

public Drawable getDrawable (int index)

Returns the drawable for the layer at the specified index.

Related XML Attributes:

android:drawable

Parameters
`index`	`int`: The index of the layer, must be in the range `0...getNumberOfLayers()-1`.

Returns
`Drawable`	The `Drawable` at the specified layer index.

See also:

setDrawable(int, Drawable)

getEndPadding

Added in API level 23

public int getEndPadding ()

Returns the end padding in pixels.

Returns
`int`	the end padding in pixels, or -1 if not explicitly specified

See also:

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`.

getId

Added in API level 1

public int getId (int index)

Returns the ID of the specified layer.

Related XML Attributes:

android:id

Parameters
`index`	`int`: The index of the layer, must be in the range `0...getNumberOfLayers()-1`.

Returns
`int`	The id of the layer or `View.NO_ID` if the layer has no id.

See also:

setId(int, int)

getIntrinsicHeight

Added in API level 1

public int getIntrinsicHeight ()

Returns the drawable's intrinsic height.

Intrinsic height is the height at which the drawable would like to be laid out, including any inherent padding. If the drawable has no intrinsic height, such as a solid color, this method returns -1.

Returns
`int`	the intrinsic height, or -1 if no intrinsic height

getIntrinsicWidth

Added in API level 1

public int getIntrinsicWidth ()

Returns the drawable's intrinsic width.

Intrinsic width is the width at which the drawable would like to be laid out, including any inherent padding. If the drawable has no intrinsic width, such as a solid color, this method returns -1.

Returns
`int`	the intrinsic width, or -1 if no intrinsic width

getLayerGravity

Added in API level 23

public int getLayerGravity (int index)

Related XML Attributes:

android:gravity

Parameters
`index`	`int`: the index of the layer

Returns
`int`	the gravity used to position or stretch the specified layer within its container

See also:

setLayerGravity(int, int)

getLayerHeight

Added in API level 23

public int getLayerHeight (int index)

Related XML Attributes:

android:height

Parameters
`index`	`int`: the index of the drawable to adjust

Returns
`int`	the explicit height of the layer, or -1 if not specified

See also:

setLayerSize(int, int, int)

getLayerInsetBottom

Added in API level 23

public int getLayerInsetBottom (int index)

Related XML Attributes:

android:bottom

Parameters
`index`	`int`: the index of the layer

Returns
`int`	number of pixels to inset from the bottom bound

getLayerInsetEnd

Added in API level 23

public int getLayerInsetEnd (int index)

Related XML Attributes:

android:end

Parameters
`index`	`int`: the index of the layer

Returns
`int`	number of pixels to inset from the end bound

getLayerInsetLeft

Added in API level 23

public int getLayerInsetLeft (int index)

Related XML Attributes:

android:left

Parameters
`index`	`int`: the index of the layer

Returns
`int`	number of pixels to inset from the left bound

getLayerInsetRight

Added in API level 23

public int getLayerInsetRight (int index)

Related XML Attributes:

android:right

Parameters
`index`	`int`: the index of the layer

Returns
`int`	number of pixels to inset from the right bound

getLayerInsetStart

Added in API level 23

public int getLayerInsetStart (int index)

Related XML Attributes:

android:start

Parameters
`index`	`int`: the index of the layer

Returns
`int`	the number of pixels to inset from the start bound, or `INSET_UNDEFINED` if not specified

getLayerInsetTop

Added in API level 23

public int getLayerInsetTop (int index)

Related XML Attributes:

android:top

Parameters
`index`	`int`: the index of the layer

Returns
`int`	number of pixels to inset from the top bound

getLayerWidth

Added in API level 23

public int getLayerWidth (int index)

Related XML Attributes:

android:width

Parameters
`index`	`int`: the index of the drawable to adjust

Returns
`int`	the explicit width of the layer, or -1 if not specified

See also:

setLayerSize(int, int, int)

getLeftPadding

Added in API level 23

public int getLeftPadding ()

Returns the left padding in pixels.

Returns
`int`	the left padding in pixels, or -1 if not explicitly specified

See also:

getNumberOfLayers

Added in API level 1

public int getNumberOfLayers ()

Returns the number of layers contained within this layer drawable.

Returns
`int`	The number of layers.

getOpacity

Added in API level 1

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 (non-empty) layer outline.

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

getPadding

Added in API level 1

public boolean getPadding (Rect padding)

Return in padding the insets suggested by this Drawable for placing content inside the drawable's bounds. Positive values move toward the center of the Drawable (set Rect.inset).

Parameters
`padding`	`Rect`: This value cannot be `null`.

Returns
`boolean`	true if this drawable actually has a padding, else false. When false is returned, the padding is always set to 0.

getPaddingMode

Added in API level 21

public int getPaddingMode ()

Related XML Attributes:

android:paddingMode

Returns
`int`	the current padding mode

See also:

setPaddingMode(int)

getRightPadding

Added in API level 23

public int getRightPadding ()

Returns the right padding in pixels.

Returns
`int`	the right padding in pixels, or -1 if not explicitly specified

See also:

getStartPadding

Added in API level 23

public int getStartPadding ()

Returns the start padding in pixels.

Returns
`int`	the start padding in pixels, or -1 if not explicitly specified

See also:

getTopPadding

Added in API level 23

public int getTopPadding ()

Returns the top padding in pixels.

Returns
`int`	the top padding in pixels, or -1 if not explicitly specified

See also:

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`.

Throws
`IOException`
`XmlPullParserException`

invalidateDrawable

Added in API level 1

public void invalidateDrawable (Drawable who)

Called when the drawable needs to be redrawn. A view at this point should invalidate itself (or at least the part of itself where the drawable appears).

Parameters
`who`	`Drawable`: This value cannot be `null`.

isAutoMirrored

Added in API level 19

public boolean isAutoMirrored ()

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

Returns
`boolean`	boolean Returns true if this Drawable will be automatically mirrored.

isStateful

Added in API level 1

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 11

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 3

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`.

onLayoutDirectionChanged

Added in API level 23

public boolean onLayoutDirectionChanged (int layoutDirection)

Called when the drawable's resolved layout direction changes.

Parameters
`layoutDirection`	`int`: Value is `View.LAYOUT_DIRECTION_LTR`, or `View.LAYOUT_DIRECTION_RTL`

Returns
`boolean`	`true` if the layout direction change has caused the appearance of the drawable to change such that it needs to be re-drawn, `false` otherwise

scheduleDrawable

Added in API level 1

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

A Drawable can call this to schedule the next frame of its animation. An implementation can generally simply call Handler.postAtTime(Runnable, Object, long) with the parameters (what, who, when) to perform the scheduling.

Parameters
`who`	`Drawable`: This value cannot be `null`.
`what`	`Runnable`: This value cannot be `null`.
`when`	`long`: The time (in milliseconds) to run. The timebase is `SystemClock.uptimeMillis()`

setAlpha

Added in API level 1

public void setAlpha (int alpha)

Specify an alpha value for the drawable. 0 means fully transparent, and 255 means fully opaque.

Parameters
`alpha`	`int`: Value is between 0 and 255 inclusive

setAutoMirrored

Added in API level 19

public void setAutoMirrored (boolean mirrored)

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

Parameters
`mirrored`	`boolean`: Set to true if the Drawable should be mirrored, false if not.

setColorFilter

Added in API level 1

public void setColorFilter (ColorFilter colorFilter)

Specify an optional color filter for the drawable.

If a Drawable has a ColorFilter, each output pixel of the Drawable's drawing contents will be modified by the color filter before it is blended onto the render target of a Canvas.

Pass null to remove any existing color filter.

Note: Setting a non-null color filter disables tint.

Parameters
`colorFilter`	`ColorFilter`: The color filter to apply, or `null` to remove the existing color filter

setDither

Added in API level 1

public void setDither (boolean dither)

This method is deprecated.
This property is ignored.

Set to true to have the drawable dither its colors when drawn to a device with fewer than 8-bits per color component.

Parameters
`dither`	`boolean`

setDrawable

Added in API level 23

public void setDrawable (int index, 
                Drawable drawable)

Sets the drawable for the layer at the specified index.

Related XML Attributes:

android:drawable

Parameters
`index`	`int`: The index of the layer to modify, must be in the range `0...getNumberOfLayers()-1`.
`drawable`	`Drawable`: The drawable to set for the layer.

See also:

getDrawable(int)

setDrawableByLayerId

Added in API level 1

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).

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

setId

Added in API level 1

public void setId (int index, 
                int id)

Sets the ID of a layer.

Related XML Attributes:

android:id

Parameters
`index`	`int`: The index of the layer to modify, must be in the range `0...getNumberOfLayers()-1`.
`id`	`int`: The id to assign to the layer.

See also:

getId(int)

setLayerGravity

Added in API level 23

public void setLayerGravity (int index, 
                int gravity)

Sets the gravity used to position or stretch the specified layer within its container. Gravity is applied after any layer insets (see setLayerInset(int, int, int, int, int)) or padding (see setPaddingMode(int)).

If gravity is specified as Gravity#NO_GRAVITY, the default behavior depends on whether an explicit width or height has been set (see setLayerSize(int, int, int)), If a dimension is not set, gravity in that direction defaults to Gravity#FILL_HORIZONTAL or Gravity#FILL_VERTICAL; otherwise, gravity in that direction defaults to Gravity#LEFT or Gravity#TOP.

Related XML Attributes:

android:gravity

Parameters
`index`	`int`: the index of the drawable to adjust
`gravity`	`int`: the gravity to set for the layer

See also:

getLayerGravity(int)

setLayerHeight

Added in API level 23

public void setLayerHeight (int index, 
                int h)

Related XML Attributes:

android:height

Parameters
`index`	`int`: the index of the layer to adjust
`h`	`int`: height in pixels, or -1 to use the intrinsic height

setLayerInset

Added in API level 1

public void setLayerInset (int index, 
                int l, 
                int t, 
                int r, 
                int b)

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

Related XML Attributes:

Parameters
`index`	`int`: the index of the drawable to adjust
`l`	`int`: number of pixels to add to the left bound
`t`	`int`: number of pixels to add to the top bound
`r`	`int`: number of pixels to subtract from the right bound
`b`	`int`: number of pixels to subtract from the bottom bound

setLayerInsetBottom

Added in API level 23

public void setLayerInsetBottom (int index, 
                int b)

Related XML Attributes:

android:bottom

Parameters
`index`	`int`: the index of the layer to adjust
`b`	`int`: number of pixels to inset from the bottom bound

setLayerInsetEnd

Added in API level 23

public void setLayerInsetEnd (int index, 
                int e)

Related XML Attributes:

android:end

Parameters
`index`	`int`: the index of the layer to adjust
`e`	`int`: number of pixels to inset from the end bound, or `INSET_UNDEFINED` if not specified

setLayerInsetLeft

Added in API level 23

public void setLayerInsetLeft (int index, 
                int l)

Related XML Attributes:

android:left

Parameters
`index`	`int`: the index of the layer to adjust
`l`	`int`: number of pixels to inset from the left bound

setLayerInsetRelative

Added in API level 23

public 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.

Related XML Attributes:

Parameters
`index`	`int`: the index of the layer to adjust
`s`	`int`: number of pixels to inset from the start bound
`t`	`int`: number of pixels to inset from the top bound
`e`	`int`: number of pixels to inset from the end bound
`b`	`int`: number of pixels to inset from the bottom bound

setLayerInsetRight

Added in API level 23

public void setLayerInsetRight (int index, 
                int r)

Related XML Attributes:

android:right

Parameters
`index`	`int`: the index of the layer to adjust
`r`	`int`: number of pixels to inset from the right bound

setLayerInsetStart

Added in API level 23

public void setLayerInsetStart (int index, 
                int s)

Related XML Attributes:

android:start

Parameters
`index`	`int`: the index of the layer to adjust
`s`	`int`: number of pixels to inset from the start bound

setLayerInsetTop

Added in API level 23

public void setLayerInsetTop (int index, 
                int t)

Related XML Attributes:

android:top

Parameters
`index`	`int`: the index of the layer to adjust
`t`	`int`: number of pixels to inset from the top bound

setLayerSize

Added in API level 23

public void setLayerSize (int index, 
                int w, 
                int h)

Sets an explicit size for the specified layer.

Note: Setting an explicit layer size changes the default layer gravity behavior. See setLayerGravity(int, int) for more information.

Related XML Attributes:

Parameters
`index`	`int`: the index of the layer to adjust
`w`	`int`: width in pixels, or -1 to use the intrinsic width
`h`	`int`: height in pixels, or -1 to use the intrinsic height

See also:

setLayerWidth

Added in API level 23

public void setLayerWidth (int index, 
                int w)

Related XML Attributes:

android:width

Parameters
`index`	`int`: the index of the layer to adjust
`w`	`int`: width in pixels, or -1 to use the intrinsic width

setOpacity

Added in API level 11

public void setOpacity (int opacity)

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

Parameters
`opacity`	`int`: The opacity to use, or `PixelFormat.UNKNOWN` for the default behavior

See also:

setPadding

Added in API level 23

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

Sets the absolute padding.

If padding in a dimension is specified as -1, the resolved padding will use the value computed according to the padding mode (see setPaddingMode(int)).

Calling this method clears any relative padding values previously set using setPaddingRelative(int, int, int, int).

Related XML Attributes:

Parameters
`left`	`int`: the left padding in pixels, or -1 to use computed padding
`top`	`int`: the top padding in pixels, or -1 to use computed padding
`right`	`int`: the right padding in pixels, or -1 to use computed padding
`bottom`	`int`: the bottom padding in pixels, or -1 to use computed padding

See also:

setPaddingRelative(int, int, int, int)

setPaddingMode

Added in API level 21

public void setPaddingMode (int mode)

Specifies how layer padding should affect the bounds of subsequent layers. The default value is PADDING_MODE_NEST.

Related XML Attributes:

android:paddingMode

Parameters

mode

int: padding mode, one of:

PADDING_MODE_NEST to nest each layer inside the padding of the previous layer
PADDING_MODE_STACK to stack each layer directly atop the previous layer

See also:

getPaddingMode()

setPaddingRelative

Added in API level 23

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

Sets the relative padding.

If padding in a dimension is specified as -1, the resolved padding will use the value computed according to the padding mode (see setPaddingMode(int)).

Calling this method clears any absolute padding values previously set using setPadding(int, int, int, int).

Related XML Attributes:

Parameters
`start`	`int`: the start padding in pixels, or -1 to use computed padding
`top`	`int`: the top padding in pixels, or -1 to use computed padding
`end`	`int`: the end padding in pixels, or -1 to use computed padding
`bottom`	`int`: the bottom padding in pixels, or -1 to use computed padding

See also:

setPadding(int, int, int, int)

setTintBlendMode

Added in API level 29

public void setTintBlendMode (BlendMode blendMode)

Specifies a tint blending mode for this drawable.

Defines how this drawable's tint color should be blended into the drawable before it is drawn to screen. Default tint mode is BlendMode#SRC_IN.

Note: Setting a color filter via setColorFilter(android.graphics.ColorFilter)

Parameters
`blendMode`	`BlendMode`: This value cannot be `null`.

setTintList

Added in API level 21

public void setTintList (ColorStateList tint)

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

A Drawable's drawing content will be blended together with its tint before it is drawn to the screen. This functions similarly to setColorFilter(int, android.graphics.PorterDuff.Mode).

Note: Setting a color filter via setColorFilter(android.graphics.ColorFilter) or setColorFilter(int, android.graphics.PorterDuff.Mode) overrides tint.

Parameters
`tint`	`ColorStateList`: Color state list to use for tinting this drawable, or `null` to clear the tint

setVisible

Added in API level 1

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.

unscheduleDrawable

Added in API level 1

public void unscheduleDrawable (Drawable who, 
                Runnable what)

A Drawable can call this to unschedule an action previously scheduled with scheduleDrawable(Drawable, Runnable, long). An implementation can generally simply call Handler.removeCallbacks(Runnable, Object) with the parameters (what, who) to unschedule the drawable.

Parameters
`who`	`Drawable`: This value cannot be `null`.
`what`	`Runnable`: This value cannot be `null`.

Protected methods

onBoundsChange

Added in API level 1

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`.

onLevelChange

Added in API level 1

protected boolean onLevelChange (int level)

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

Parameters
`level`	`int`

Returns
`boolean`	Returns true if the level 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 level.

onStateChange

Added in API level 1

protected boolean onStateChange (int[] state)

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

Parameters
`state`	`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.