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ConstantState.java API Doc Android 5.1 API 2308 Thu Mar 12 22:22:10 GMT 2015 android.content.res

ConstantState

java.lang.Object

public abstract class ConstantState extends Object

A cache class that can provide new instances of a particular resource which may change depending on the current {@link Resources.Theme} or {@link Configuration}.

A constant state should be able to return a bitmask of changing configurations, which identifies the type of configuration changes that may invalidate this resource. These configuration changes can be obtained from {@link android.util.TypedValue}. Entities such as {@link android.animation.Animator} also provide a changing configuration method to include their dependencies (e.g. An AnimatorSet's changing configuration is the union of the changing configurations of each Animator in the set)

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Fields Summary
Constructors Summary
Methods Summary
public abstract int getChangingConfigurations()
Return a bit mask of configuration changes that will impact this resource (and thus require completely reloading it).
public abstract T newInstance()
Create a new instance without supplying resources the caller is running in.
public T newInstance(Resources res)
Create a new instance from its constant state. This must be implemented for resources that change based on the target density of their caller (that is depending on whether it is in compatibility mode).
return newInstance();
public T newInstance(Resources res, Resources.Theme theme)
Create a new instance from its constant state. This must be implemented for resources that can have a theme applied.
return newInstance(res);