public class

StateListDrawable

extends DrawableContainer

java.lang.Object
↳	android.graphics.drawable.Drawable
	↳	android.graphics.drawable.DrawableContainer
		↳	android.graphics.drawable.StateListDrawable

Class Overview

Lets you assign a number of graphic images to a single Drawable and swap out the visible item by a string ID value.

It can be defined in an XML file with the <selector> element. Each state Drawable is defined in a nested <item> element.

Summary

XML Attributes
Attribute Name	Related Method	Description
android:constantSize		If true, the drawable's reported internal size will remain constant as the state changes; the size is the maximum of all of the states.
android:state_active		State value for StateListDrawable.
android:state_checkable		State identifier indicating that the object `may` display a check mark.
android:state_checked		State identifier indicating that the object is currently checked.
android:state_enabled		State value for StateListDrawable.
android:state_first		State value for StateListDrawable.
android:state_focused		State value for StateListDrawable.
android:state_last		State value for StateListDrawable.
android:state_middle		State value for StateListDrawable.
android:state_pressed		State value for StateListDrawable.
android:state_selected		State value for StateListDrawable.
android:state_single		State value for StateListDrawable.
android:state_window_focused		State value for StateListDrawable.
android:variablePadding		If true, allows the drawable's padding to change based on the current state that is selected.
android:visible		Provides initial visibility state of the drawable; the default value is false.

Public Constructors
	StateListDrawable()

Public Methods
void	addState(int[] stateSet, Drawable drawable) Add a new image/string ID to the set of images.
void	inflate(Resources r, XmlPullParser parser, AttributeSet attrs)
boolean	isStateful() Indicates whether this view will change its appearance based on state.
Drawable	mutate() Make this drawable mutable.

Protected Methods
boolean	onStateChange(int[] stateSet) Override this in your subclass to change appearance if you recognize the specified state.

[Expand]

Inherited Methods

From class android.graphics.drawable.DrawableContainer

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	getChangingConfigurations() Return a mask of the configuration parameters for which this drawable mau change, requiring that it be re-created.
Drawable.ConstantState	getConstantState()
Drawable	getCurrent()
int	getIntrinsicHeight() Return the intrinsic height of the underlying drawable object.
int	getIntrinsicWidth() Return the intrinsic width of the underlying drawable object.
int	getMinimumHeight() Returns the minimum height suggested by this Drawable.
int	getMinimumWidth() Returns the minimum width suggested by this Drawable.
int	getOpacity() Return the opacity/transparency of this Drawable.
boolean	getPadding(Rect padding) Return in padding the insets suggested by this Drawable for placing content inside the drawable's bounds.
void	invalidateDrawable(Drawable who) Called when the drawable needs to be redrawn.
boolean	isStateful() Indicates whether this view will change its appearance based on state.
Drawable	mutate() Make this drawable mutable.
void	onBoundsChange(Rect bounds) Override this in your subclass to change appearance if you recognize the specified state.
boolean	onLevelChange(int level) Override this in your subclass to change appearance if you vary based on level.
boolean	onStateChange(int[] state) Override this in your subclass to change appearance if you recognize the specified state.
void	scheduleDrawable(Drawable who, Runnable what, long when) A Drawable can call this to schedule the next frame of its animation.
boolean	selectDrawable(int idx)
void	setAlpha(int alpha) Specify an alpha value for the drawable.
void	setColorFilter(ColorFilter cf) Specify an optional colorFilter for the drawable.
void	setConstantState(DrawableContainer.DrawableContainerState state)
void	setDither(boolean dither) Set to true to have the drawable dither its colors when drawn to a device with fewer than 8-bits per color component.
boolean	setVisible(boolean visible, boolean restart) Set whether this Drawable is visible.
void	unscheduleDrawable(Drawable who, Runnable what) A Drawable can call this to unschedule an action previously scheduled with scheduleDrawable(Drawable, Runnable, long).

From class android.graphics.drawable.Drawable

void	clearColorFilter()
final Rect	copyBounds() Return a copy of the drawable's bounds in a new Rect.
final void	copyBounds(Rect bounds) Return a copy of the drawable's bounds in the specified Rect (allocated by the caller).
static Drawable	createFromPath(String pathName) Create a drawable from file path name.
static Drawable	createFromStream(InputStream is, String srcName) Create a drawable from an inputstream
static Drawable	createFromXml(Resources r, XmlPullParser parser) Create a drawable from an XML document.
static Drawable	createFromXmlInner(Resources r, XmlPullParser parser, AttributeSet attrs) Create from inside an XML document.
abstract 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).
final Rect	getBounds() Return the drawable's bounds Rect.
int	getChangingConfigurations() Return a mask of the configuration parameters for which this drawable mau change, requiring that it be re-created.
Drawable.ConstantState	getConstantState()
Drawable	getCurrent()
int	getIntrinsicHeight() Return the intrinsic height of the underlying drawable object.
int	getIntrinsicWidth() Return the intrinsic width of the underlying drawable object.
final int	getLevel() Retrieve the current level.
int	getMinimumHeight() Returns the minimum height suggested by this Drawable.
int	getMinimumWidth() Returns the minimum width suggested by this Drawable.
abstract int	getOpacity() Return the opacity/transparency of this Drawable.
boolean	getPadding(Rect padding) Return in padding the insets suggested by this Drawable for placing content inside the drawable's bounds.
int[]	getState() Describes the current state, as a union of primitve states, such as state_focused, state_selected, etc.
Region	getTransparentRegion() Returns a Region representing the part of the Drawable that is completely transparent.
void	inflate(Resources r, XmlPullParser parser, AttributeSet attrs)
void	invalidateSelf() Use the current Drawable.Callback implementation to have this Drawable redrawn.
boolean	isStateful() Indicates whether this view will change its appearance based on state.
final boolean	isVisible()
Drawable	mutate() Make this drawable mutable.
void	onBoundsChange(Rect bounds) Override this in your subclass to change appearance if you recognize the specified state.
boolean	onLevelChange(int level) Override this in your subclass to change appearance if you vary based on level.
boolean	onStateChange(int[] state) Override this in your subclass to change appearance if you recognize the specified state.
static int	resolveOpacity(int op1, int op2) Return the appropriate opacity value for two source opacities.
void	scheduleSelf(Runnable what, long when) Use the current Drawable.Callback implementation to have this Drawable scheduled.
abstract void	setAlpha(int alpha) Specify an alpha value for the drawable.
void	setBounds(Rect bounds) Specify a bounding rectangle for the Drawable.
void	setBounds(int left, int top, int right, int bottom) Specify a bounding rectangle for the Drawable.
final void	setCallback(Drawable.Callback cb) Bind a Drawable.Callback object to this Drawable.
void	setChangingConfigurations(int configs) Set a mask of the configuration parameters for which this drawable may change, requiring that it be re-created.
abstract void	setColorFilter(ColorFilter cf) Specify an optional colorFilter for the drawable.
void	setColorFilter(int color, PorterDuff.Mode mode) Specify a color and porterduff mode to be the colorfilter for this drawable.
void	setDither(boolean dither) Set to true to have the drawable dither its colors when drawn to a device with fewer than 8-bits per color component.
void	setFilterBitmap(boolean filter) Set to true to have the drawable filter its bitmap when scaled or rotated (for drawables that use bitmaps).
final boolean	setLevel(int level) Specify the level for the drawable.
boolean	setState(int[] stateSet) Specify a set of states for the drawable.
boolean	setVisible(boolean visible, boolean restart) Set whether this Drawable is visible.
void	unscheduleSelf(Runnable what) Use the current Drawable.Callback implementation to have this Drawable unscheduled.

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() Is called before the object's memory is being reclaimed by the VM.
final Class<? extends Object>	getClass() Returns the unique instance of Class which 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(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.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.

From interface android.graphics.drawable.Drawable.Callback

XML Attributes

android:constantSize

If true, the drawable's reported internal size will remain constant as the state changes; the size is the maximum of all of the states. If false, the size will vary based on the current state.

Must be a boolean value, either "true" or "false".