ColorStateListDrawable


public class ColorStateListDrawable
extends Drawable implements Drawable.Callback

java.lang.Object
   ↳ 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

ColorStateListDrawable()
ColorStateListDrawable(ColorStateList colorStateList)

Public methods

void applyTheme(Resources.Theme t)

Applies the specified theme to this Drawable and its children.

boolean canApplyTheme()
void clearAlpha()

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

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.

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.

ColorStateList getColorStateList()

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

Drawable.ConstantState getConstantState()

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

Drawable getCurrent()

int getOpacity()

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

boolean hasFocusStateSpecified()

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

void invalidateDrawable(Drawable who)

Called when the drawable needs to be redrawn.

boolean isStateful()

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

Drawable mutate()

Make this drawable mutable.

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 setColorFilter(ColorFilter colorFilter)

Specify an optional color filter for the drawable.

void setColorStateList(ColorStateList colorStateList)

Replace this Drawable's ColorStateList.

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 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 onStateChange(int[] state)

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

Inherited methods

Public constructors

ColorStateListDrawable

Added in API level 29
public ColorStateListDrawable ()

ColorStateListDrawable

Added in API level 29
public ColorStateListDrawable (ColorStateList colorStateList)

Parameters
colorStateList ColorStateList: This value cannot be null.

Public methods

applyTheme

Added in API level 29
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 29
public boolean canApplyTheme ()

Returns
boolean

clearAlpha

Added in API level 29
public void clearAlpha ()

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

draw

Added in API level 29
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: This value cannot be null.

getAlpha

Added in API level 29
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

getChangingConfigurations

Added in API level 29
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
int Returns a mask of the changing configuration parameters, as defined by ActivityInfo. 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

getColorFilter

Added in API level 29
public ColorFilter getColorFilter ()

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

Returns
ColorFilter This value may be null.

getColorStateList

Added in API level 29
public ColorStateList getColorStateList ()

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

Returns
ColorStateList a ColorStateList This value cannot be null.

getConstantState

Added in API level 29
public Drawable.ConstantState getConstantState ()

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

Returns
Drawable.ConstantState This value cannot be null.

getCurrent

Added in API level 29
public Drawable getCurrent ()

Returns
Drawable This value cannot be null.

getOpacity

Added in API level 29
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 Value is PixelFormat.UNKNOWN, PixelFormat.TRANSLUCENT, PixelFormat.TRANSPARENT, or PixelFormat.OPAQUE

hasFocusStateSpecified

Added in API level 29
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.

invalidateDrawable

Added in API level 29
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.

isStateful

Added in API level 29
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.

mutate

Added in API level 29
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 value cannot be null.

scheduleDrawable

Added in API level 29
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 29
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

setColorFilter

Added in API level 29
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: This value may be null.

setColorStateList

Added in API level 29
public void setColorStateList (ColorStateList colorStateList)

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

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

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 29
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: This value may be null.

unscheduleDrawable

Added in API level 29
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 29
protected void onBoundsChange (Rect bounds)

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

Parameters
bounds Rect: This value cannot be null.

onStateChange

Added in API level 29
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.