Drawable.ConstantState

extends Object

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

Known Direct Subclasses

DrawableContainer.DrawableContainerState

Class Overview

This abstract class is used by Drawables to store shared constant state and data between Drawables. BitmapDrawables created from the same resource will for instance share a unique bitmap stored in their ConstantState.

newDrawable(Resources) can be used as a factory to create new Drawable instances from this ConstantState.

Use getConstantState() to retrieve the ConstantState of a Drawable. Calling mutate() on a Drawable should typically create a new ConstantState for that Drawable.

Summary

Public Constructors
	Drawable.ConstantState()

Public Methods
abstract int	getChangingConfigurations() Return a bit mask of configuration changes that will impact this drawable (and thus require completely reloading it).
abstract Drawable	newDrawable() Create a new drawable without supplying resources the caller is running in.
Drawable	newDrawable(Resources res) Create a new Drawable instance from its constant state.

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Inherited Methods

From class java.lang.Object

Object	clone() Creates and returns a copy of this `Object`.
boolean	equals(Object o) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Called before the object's memory is reclaimed by the VM.
final Class<?>	getClass() Returns the unique instance of `Class` that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait(long millis, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait(long millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

Public Constructors

public Drawable.ConstantState ()

Since: API Level 1

Public Methods

public abstract int getChangingConfigurations ()

Since: API Level 1

Return a bit mask of configuration changes that will impact this drawable (and thus require completely reloading it).

public abstract Drawable newDrawable ()

Since: API Level 1

Create a new drawable without supplying resources the caller is running in. Note that using this means the density-dependent drawables (like bitmaps) will not be able to update their target density correctly. One should use newDrawable(Resources) instead to provide a resource.

public Drawable newDrawable (Resources res)

Since: API Level 5

Create a new Drawable instance from its constant state. This must be implemented for drawables that change based on the target density of their caller (that is depending on whether it is in compatibility mode).

Interfaces

Classes

Enums

Drawable.ConstantState

Class Overview

Summary

Public Constructors

public Drawable.ConstantState ()

Public Methods

public abstract int getChangingConfigurations ()

public abstract Drawable newDrawable ()

public Drawable newDrawable (Resources res)