Added in API level 29

ColorStateListDrawable


open class ColorStateListDrawable : Drawable, Drawable.Callback
kotlin.Any
   ↳ android.graphics.drawable.Drawable
   ↳ android.graphics.drawable.ColorStateListDrawable

A Drawable that manages a ColorDrawable to make it stateful and backed by a ColorStateList.

Summary

Public constructors

Public methods
open Unit

Applies the specified theme to this Drawable and its children.

open Boolean

open Unit

Remove the alpha override, reverting to the alpha defined on each color in the ColorStateList.

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

Gets the current alpha value for the drawable.

open Int

open ColorFilter?

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

open ColorStateList

Returns the ColorStateList backing this Drawable, or a new ColorStateList of the default ColorDrawable color if one hasn't been defined yet.

open Drawable.ConstantState

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

open Drawable

open Int

Return the opacity/transparency of this Drawable.

open Boolean

open Unit

Called when the drawable needs to be redrawn.

open Boolean

open Drawable

Make this drawable mutable.

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)

Specify an alpha value for the drawable.

open Unit
setColorFilter(colorFilter: ColorFilter?)

Specify an optional color filter for the drawable.

open Unit

Replace this Drawable's ColorStateList.

open Unit

Specifies a tint blending mode for this drawable.

open Unit

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

open Unit

A Drawable can call this to unschedule an action previously scheduled with scheduleDrawable.

Protected methods
open Unit

open Boolean

Inherited functions

Public constructors

ColorStateListDrawable

Added in API level 29
ColorStateListDrawable()

ColorStateListDrawable

Added in API level 29
ColorStateListDrawable(colorStateList: ColorStateList)
Parameters
colorStateList ColorStateList: This value cannot be null.

Public methods

applyTheme

Added in API level 29
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 29
open fun canApplyTheme(): Boolean

clearAlpha

Added in API level 29
open fun clearAlpha(): Unit

Remove the alpha override, reverting to the alpha defined on each color in the ColorStateList.

draw

Added in API level 29
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 29
open fun getAlpha(): Int

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.

Return
Int Value is between 0 and 255 inclusive

getColorFilter

Added in API level 29
open fun getColorFilter(): ColorFilter?

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

Return
ColorFilter? This value may be null.

getColorStateList

Added in API level 29
open fun getColorStateList(): ColorStateList

Returns the ColorStateList backing this Drawable, or a new ColorStateList of the default ColorDrawable color if one hasn't been defined yet.

Return
ColorStateList a ColorStateList This value cannot be null.

getConstantState

Added in API level 29
open fun getConstantState(): Drawable.ConstantState

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

Return
Drawable.ConstantState This value cannot be null.

getCurrent

Added in API level 29
open fun getCurrent(): Drawable
Return
Drawable This value cannot be null.

getOpacity

Added in API level 29
open fun getOpacity(): Int

Return the opacity/transparency of this Drawable. The returned value is one of the abstract format constants in android.graphics.PixelFormat: android.graphics.PixelFormat#UNKNOWN, android.graphics.PixelFormat#TRANSLUCENT, android.graphics.PixelFormat#TRANSPARENT, or android.graphics.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 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 or #setColorFilter methods. Some subclasses, such as BitmapDrawable, ColorDrawable, and GradientDrawable, do account for the value of setAlpha, but the general behavior is dependent upon the implementation of the subclass.

Return
Int Value is android.graphics.PixelFormat#UNKNOWN, android.graphics.PixelFormat#TRANSLUCENT, android.graphics.PixelFormat#TRANSPARENT, or android.graphics.PixelFormat#OPAQUE

hasFocusStateSpecified

Added in API level 29
open fun hasFocusStateSpecified(): Boolean
Return
Boolean true if android.R.attr#state_focused is specified for this drawable.

invalidateDrawable

Added in API level 29
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 29
open fun isStateful(): Boolean
Return
Boolean True if this drawable changes its appearance based on state, false otherwise.

mutate

Added in API level 29
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.

scheduleDrawable

Added in API level 29
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 29
open fun setAlpha(alpha: Int): Unit

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

setColorFilter

Added in API level 29
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.

setColorStateList

Added in API level 29
open fun setColorStateList(colorStateList: ColorStateList): Unit

Replace this Drawable's ColorStateList. It is not copied, so changes will propagate on the next call to setState(int[]).

Parameters
colorStateList ColorStateList: A color state list to attach. This value cannot be null.

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 29
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.

unscheduleDrawable

Added in API level 29
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 29
protected open fun onBoundsChange(bounds: Rect): Unit
Parameters
bounds Rect: This value cannot be null.

onStateChange

Added in API level 29
protected open fun onStateChange(state: IntArray): Boolean
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.