DrawableWrapper

Kotlin |Java

abstract class DrawableWrapper : Drawable, Drawable.Callback

kotlin.Any
↳	android.graphics.drawable.Drawable
	↳	android.graphics.drawable.DrawableWrapper

Known Direct Subclasses

ClipDrawable, InsetDrawable, RotateDrawable, ScaleDrawable

ClipDrawable	A Drawable that clips another Drawable based on this Drawable's current level value.
InsetDrawable	A Drawable that insets another Drawable by a specified distance or fraction of the content bounds.
RotateDrawable	A Drawable that can rotate another Drawable based on the current level value.
ScaleDrawable	A Drawable that changes the size of another Drawable based on its current level value.

Drawable container with only one child element.

Summary

Public constructors
`DrawableWrapper(dr: Drawable?)` Creates a new wrapper around the specified drawable.

Public methods
open Unit	`applyTheme(t: Resources.Theme)` Applies the specified theme to this Drawable and its children.
open Boolean	`canApplyTheme()`
open Unit	`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).
open Int	`getAlpha()`
open Int	`getChangingConfigurations()` Return a mask of the configuration parameters for which this drawable may change, requiring that it be re-created.
open ColorFilter?	`getColorFilter()`
open Drawable.ConstantState?	`getConstantState()` Return a `ConstantState` instance that holds the shared state of this Drawable.
open Drawable?	`getDrawable()`
open Unit	`getHotspotBounds(outRect: Rect)` Populates `outRect` with the hotspot bounds.
open Int	`getIntrinsicHeight()`
open Int	`getIntrinsicWidth()`
open Int	`getOpacity()`
open Insets	`getOpticalInsets()`
open Unit	`getOutline(outline: Outline)` Called to get the drawable to populate the Outline that defines its drawing area.
open Boolean	`getPadding(padding: Rect)` Return in padding the insets suggested by this Drawable for placing content inside the drawable's bounds.
open Boolean	`hasFocusStateSpecified()`
open Unit	`inflate(r: Resources, parser: XmlPullParser, attrs: AttributeSet, theme: Resources.Theme?)` Inflate this Drawable from an XML resource optionally styled by a theme.
open Unit	`invalidateDrawable(who: Drawable)` Called when the drawable needs to be redrawn.
open Boolean	`isStateful()`
open Unit	`jumpToCurrentState()`
open Drawable	`mutate()` Make this drawable mutable.
open Boolean	`onLayoutDirectionChanged(layoutDirection: Int)` Called when the drawable's resolved layout direction changes.
open Unit	`scheduleDrawable(who: Drawable, what: Runnable, when: Long)` A Drawable can call this to schedule the next frame of its animation.
open Unit	`setAlpha(alpha: Int)`
open Unit	`setColorFilter(colorFilter: ColorFilter?)` Specify an optional color filter for the drawable.
open Unit	`setDrawable(dr: Drawable?)` Sets the wrapped drawable.
open Unit	`setHotspot(x: Float, y: Float)`
open Unit	`setHotspotBounds(left: Int, top: Int, right: Int, bottom: Int)`
open Unit	`setTintBlendMode(blendMode: BlendMode!)` Specifies a tint blending mode for this drawable.
open Unit	`setTintList(tint: ColorStateList?)` Specifies tint color for this drawable as a color state list.
open Boolean	`setVisible(visible: Boolean, restart: Boolean)`
open Unit	`unscheduleDrawable(who: Drawable, what: Runnable)` A Drawable can call this to unschedule an action previously scheduled with `scheduleDrawable`.

Protected methods
open Unit	`onBoundsChange(bounds: Rect)` Override this in your subclass to change appearance if you vary based on the bounds.
open Boolean	`onLevelChange(level: Int)`
open Boolean	`onStateChange(state: IntArray)` Override this in your subclass to change appearance if you recognize the specified state.

Inherited functions

From class Drawable

`Unit`	`clearColorFilter()` Removes the color filter for this drawable.
`Unit`	`copyBounds(bounds: Rect)` Return a copy of the drawable's bounds in the specified Rect (allocated by the caller). The bounds specify where this will draw when its draw() method is called.
`Rect`	`copyBounds()` Return a copy of the drawable's bounds in a new Rect. This returns the same values as getBounds(), but the returned object is guaranteed to not be changed later by the drawable (i.e. it retains no reference to this rect). If the caller already has a Rect allocated, call copyBounds(rect).
`Drawable?`	`createFromPath(pathName: String!)` Create a drawable from file path name.
`Drawable?`	`createFromResourceStream(res: Resources?, value: TypedValue?, is: InputStream?, srcName: String?)` Create a drawable from an inputstream, using the given resources and value to determine density information.
`Drawable?`	`createFromResourceStream(res: Resources?, value: TypedValue?, is: InputStream?, srcName: String?, opts: BitmapFactory.Options?)` Create a drawable from an inputstream, using the given resources and value to determine density information.
`Drawable?`	`createFromStream(is: InputStream?, srcName: String?)` Create a drawable from an inputstream
`Drawable`	`createFromXml(r: Resources, parser: XmlPullParser)` Create a drawable from an XML document. For more information on how to create resources in XML, see Drawable Resources.
`Drawable`	`createFromXml(r: Resources, parser: XmlPullParser, theme: Resources.Theme?)` Create a drawable from an XML document using an optional `Theme`. For more information on how to create resources in XML, see Drawable Resources.
`Drawable`	`createFromXmlInner(r: Resources, parser: XmlPullParser, attrs: AttributeSet)` Create from inside an XML document. Called on a parser positioned at a tag in an XML document, tries to create a Drawable from that tag. Returns null if the tag is not a valid drawable.
`Drawable`	`createFromXmlInner(r: Resources, parser: XmlPullParser, attrs: AttributeSet, theme: Resources.Theme?)` Create a drawable from inside an XML document using an optional `Theme`. Called on a parser positioned at a tag in an XML document, tries to create a Drawable from that tag. Returns `null` if the tag is not a valid drawable.
`Rect`	`getBounds()` Return the drawable's bounds Rect. Note: for efficiency, the returned object may be the same object stored in the drawable (though this is not guaranteed), so if a persistent copy of the bounds is needed, call copyBounds(rect) instead. You should also not change the object returned by this method as it may be the same object stored in the drawable.
`Drawable.Callback?`	`getCallback()` Return the current `Callback` implementation attached to this Drawable.
`Drawable`	`getCurrent()`
`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.
`Int`	`getLayoutDirection()` Returns the resolved layout direction for this Drawable.
`Int`	`getLevel()` Retrieve the current level.
`Int`	`getMinimumHeight()` Returns the minimum height suggested by this Drawable. If a View uses this Drawable as a background, it is suggested that the View use at least this value for its height. (There will be some scenarios where this will not be possible.) This value should INCLUDE any padding.
`Int`	`getMinimumWidth()` Returns the minimum width suggested by this Drawable. If a View uses this Drawable as a background, it is suggested that the View use at least this value for its width. (There will be some scenarios where this will not be possible.) This value should INCLUDE any padding.
`IntArray`	`getState()` Describes the current state, as a union of primitive states, such as `android.R.attr#state_focused`, `android.R.attr#state_selected`, etc. Some drawables may modify their imagery based on the selected state.
`Region?`	`getTransparentRegion()` Returns a Region representing the part of the Drawable that is completely transparent. This can be used to perform drawing operations, identifying which parts of the target will not change when rendering the Drawable. The default implementation returns null, indicating no transparent region; subclasses can optionally override this to return an actual Region if they want to supply this optimization information, but it is not required that they do so.
`Unit`	`inflate(r: Resources, parser: XmlPullParser, attrs: AttributeSet)` Inflate this Drawable from an XML resource. Does not apply a theme.
`Unit`	`invalidateSelf()` Use the current `Callback` implementation to have this Drawable redrawn. Does nothing if there is no Callback attached to the Drawable.
`Boolean`	`isAutoMirrored()` Tells if this Drawable will be automatically mirrored when its layout direction is RTL right-to-left. See `android.util.LayoutDirection`.
`Boolean`	`isFilterBitmap()`
`Boolean`	`isProjected()` Whether this drawable requests projection. Indicates that the `android.graphics.RenderNode` this Drawable will draw into should be drawn immediately after the closest ancestor RenderNode containing a projection receiver.
`Boolean`	`isVisible()`
`Int`	`resolveOpacity(op1: Int, op2: Int)` Return the appropriate opacity value for two source opacities. If either is UNKNOWN, that is returned; else, if either is TRANSLUCENT, that is returned; else, if either is TRANSPARENT, that is returned; else, OPAQUE is returned. This is to help in implementing `getOpacity`.
`Unit`	`scheduleSelf(what: Runnable, when: Long)` Use the current `Callback` implementation to have this Drawable scheduled. Does nothing if there is no Callback attached to the Drawable.
`Unit`	`setAutoMirrored(mirrored: Boolean)` Set whether this Drawable is automatically mirrored when its layout direction is RTL (right-to left). See `android.util.LayoutDirection`.
`Unit`	`setBounds(left: Int, top: Int, right: Int, bottom: Int)` Specify a bounding rectangle for the Drawable. This is where the drawable will draw when its draw() method is called.
`Unit`	`setBounds(bounds: Rect)` Specify a bounding rectangle for the Drawable. This is where the drawable will draw when its draw() method is called.
`Unit`	`setCallback(cb: Drawable.Callback?)` Bind a `Callback` object to this Drawable. Required for clients that want to support animated drawables.
`Unit`	`setChangingConfigurations(configs: Int)` Set a mask of the configuration parameters for which this drawable may change, requiring that it be re-created.
`Unit`	`setColorFilter(color: Int, mode: PorterDuff.Mode)` Specify a color and Porter-Duff mode to be the color filter for this drawable. Convenience for `setColorFilter(android.graphics.ColorFilter)` which constructs a `PorterDuffColorFilter`. Note: Setting a color filter disables `tint`.
`Unit`	`setDither(dither: Boolean)` Set to true to have the drawable dither its colors when drawn to a device with fewer than 8-bits per color component.
`Unit`	`setFilterBitmap(filter: Boolean)` Set to true to have the drawable filter its bitmaps with bilinear sampling when they are scaled or rotated. This can improve appearance when bitmaps are rotated. If the drawable does not use bitmaps, this call is ignored.
`Boolean`	`setLayoutDirection(layoutDirection: Int)` Set the layout direction for this drawable. Should be a resolved layout direction, as the Drawable has no capacity to do the resolution on its own.
`Boolean`	`setLevel(level: Int)` Specify the level for the drawable. This allows a drawable to vary its imagery based on a continuous controller, for example to show progress or volume level. If the new level you are supplying causes the appearance of the Drawable to change, then it is responsible for calling `invalidateSelf` in order to have itself redrawn, and true will be returned from this function.
`Boolean`	`setState(stateSet: IntArray)` Specify a set of states for the drawable. These are use-case specific, so see the relevant documentation. As an example, the background for widgets like Button understand the following states: [`android.R.attr#state_focused`, `android.R.attr#state_pressed`]. If the new state you are supplying causes the appearance of the Drawable to change, then it is responsible for calling `invalidateSelf` in order to have itself redrawn, and true will be returned from this function. Note: The Drawable holds a reference on to stateSet until a new state array is given to it, so you must not modify this array during that time.
`Unit`	`setTint(tintColor: Int)` Specifies tint color for this drawable. 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)`. To clear the tint, pass `null` to `setTintList(android.content.res.ColorStateList)`. Note: Setting a color filter via `setColorFilter(android.graphics.ColorFilter)` or `setColorFilter(int,android.graphics.PorterDuff.Mode)` overrides tint.
`Unit`	`setTintMode(tintMode: PorterDuff.Mode?)` 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 `PorterDuff.Mode#SRC_IN`. Note: Setting a color filter via `setColorFilter(android.graphics.ColorFilter)` or `setColorFilter(int,android.graphics.PorterDuff.Mode)` overrides tint.
`Unit`	`unscheduleSelf(what: Runnable)` Use the current `Callback` implementation to have this Drawable unscheduled. Does nothing if there is no Callback attached to the Drawable.

Public constructors

DrawableWrapper

Added in API level 23

DrawableWrapper(dr: Drawable?)

Creates a new wrapper around the specified drawable.

Parameters
`dr`	Drawable?: the drawable to wrap This value may be `null`.

Public methods

applyTheme

Added in API level 23

open fun applyTheme(t: Resources.Theme): Unit

Applies the specified theme to this Drawable and its children.

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

canApplyTheme

Added in API level 23

open fun canApplyTheme(): Boolean

draw

Added in API level 23

open fun draw(canvas: Canvas): Unit

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: This value cannot be `null`.

getAlpha

Added in API level 23

open fun getAlpha(): Int

Return
`Int`	Value is between 0 and 255 inclusive

getChangingConfigurations

Added in API level 23

open fun getChangingConfigurations(): Int

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.

Return

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

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

getColorFilter

Added in API level 23

open fun getColorFilter(): ColorFilter?

Return
`ColorFilter?`	the current color filter, or `null` if none set

getConstantState

Added in API level 23

open fun getConstantState(): Drawable.ConstantState?

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

Return
`Drawable.ConstantState?`	This value may be `null`.

getDrawable

Added in API level 23

open fun getDrawable(): Drawable?

Return
`Drawable?`	the wrapped drawable This value may be `null`.

getHotspotBounds

Added in API level 23

open fun getHotspotBounds(outRect: Rect): Unit

Populates outRect with the hotspot bounds.

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

getIntrinsicHeight

Added in API level 23

open fun getIntrinsicHeight(): Int

Return
`Int`	the intrinsic height, or -1 if no intrinsic height

getIntrinsicWidth

Added in API level 23

open fun getIntrinsicWidth(): Int

Return
`Int`	the intrinsic width, or -1 if no intrinsic width

getOpacity

Added in API level 23

open fun getOpacity(): Int

Return
`Int`	int The opacity class of the Drawable. Value is `android.graphics.PixelFormat#UNKNOWN`, `android.graphics.PixelFormat#TRANSLUCENT`, `android.graphics.PixelFormat#TRANSPARENT`, or `android.graphics.PixelFormat#OPAQUE`

getOpticalInsets

Added in API level 29

open fun getOpticalInsets(): Insets

Return
`Insets`	This value cannot be `null`.

getOutline

Added in API level 23

open fun getOutline(outline: Outline): Unit

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

This method is called by the default android.view.ViewOutlineProvider to define the outline of the View.

The default behavior defines the outline to be the bounding rectangle of 0 alpha. Subclasses that wish to convey a different shape or alpha value must override this method.

Parameters
`outline`	Outline: This value cannot be `null`.

getPadding

Added in API level 23

open fun getPadding(padding: Rect): Boolean

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`.

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

hasFocusStateSpecified

Added in API level 31

open fun hasFocusStateSpecified(): Boolean

Return
`Boolean`	`true` if `android.R.attr#state_focused` is specified for this drawable.

inflate

Added in API level 23

open fun inflate(
    r: Resources, 
    parser: XmlPullParser, 
    attrs: AttributeSet, 
    theme: Resources.Theme?
): Unit

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`.

Exceptions
`org.xmlpull.v1.XmlPullParserException`
`java.io.IOException`

invalidateDrawable

Added in API level 23

open fun invalidateDrawable(who: Drawable): Unit

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`.

isStateful

Added in API level 23

open fun isStateful(): Boolean

Return
`Boolean`	True if this drawable changes its appearance based on state, false otherwise.

jumpToCurrentState

Added in API level 23

open fun jumpToCurrentState(): Unit

mutate

Added in API level 23

open fun mutate(): Drawable

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.

Return
`Drawable`	This value cannot be `null`.

onLayoutDirectionChanged

Added in API level 23

open fun onLayoutDirectionChanged(layoutDirection: Int): Boolean

Called when the drawable's resolved layout direction changes.

Parameters
`layoutDirection`	Int: Value is `android.view.View#LAYOUT_DIRECTION_LTR`, or `android.view.View#LAYOUT_DIRECTION_RTL`

Return
`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 23

open fun scheduleDrawable(
    who: Drawable, 
    what: Runnable, 
    when: Long
): Unit

A Drawable can call this to schedule the next frame of its animation. An implementation can generally simply call android.os.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 `android.os.SystemClock#uptimeMillis`

setAlpha

Added in API level 23

open fun setAlpha(alpha: Int): Unit

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

setColorFilter

Added in API level 23

open fun setColorFilter(colorFilter: ColorFilter?): Unit

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?: This value may be `null`.

setDrawable

Added in API level 23

open fun setDrawable(dr: Drawable?): Unit

Sets the wrapped drawable.

Parameters
`dr`	Drawable?: the wrapped drawable This value may be `null`.

setHotspot

Added in API level 23

open fun setHotspot(
    x: Float, 
    y: Float
): Unit

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 23

open fun setHotspotBounds(
    left: Int, 
    top: Int, 
    right: Int, 
    bottom: Int
): Unit

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

setTintBlendMode

Added in API level 29

open fun setTintBlendMode(blendMode: BlendMode!): Unit

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 23

open fun setTintList(tint: ColorStateList?): Unit

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?: This value may be `null`.

setVisible

Added in API level 23

open fun setVisible(
    visible: Boolean, 
    restart: Boolean
): Boolean

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.

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

unscheduleDrawable

Added in API level 23

open fun unscheduleDrawable(
    who: Drawable, 
    what: Runnable
): Unit

A Drawable can call this to unschedule an action previously scheduled with scheduleDrawable. An implementation can generally simply call android.os.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 23

protected open fun onBoundsChange(bounds: Rect): Unit

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 23

protected open fun onLevelChange(level: Int): Boolean

Return
`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 23

protected open fun onStateChange(state: IntArray): Boolean

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

Parameters
`state`	IntArray: This value cannot be `null`.

Return
`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.