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	createFromResourceStream(Resources res, TypedValue value, InputStream is, String srcName, BitmapFactory.Options opts) Create a drawable from an inputstream, using the given resources and value to determine density information.
static Drawable	createFromResourceStream(Resources res, TypedValue value, InputStream is, String srcName) Create a drawable from an inputstream, using the given resources and value to determine density information.
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

Since: API Level

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".

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol constantSize.

Related Methods

android:state_active

Since: API Level

State value for StateListDrawable.

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

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol state_active.

Related Methods

android:state_checkable

Since: API Level

State identifier indicating that the object may display a check mark. See state_checked for the identifier that indicates whether it is actually checked.

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

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol state_checkable.

Related Methods

android:state_checked

Since: API Level

State identifier indicating that the object is currently checked. See state_checkable for an additional identifier that can indicate if any object may ever display a check, regardless of whether state_checked is currently set.

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

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol state_checked.

Related Methods

android:state_enabled

Since: API Level

State value for StateListDrawable.

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

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol state_enabled.

Related Methods

android:state_first

Since: API Level

State value for StateListDrawable.

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

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol state_first.

Related Methods

android:state_focused

Since: API Level

State value for StateListDrawable.

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

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol state_focused.

Related Methods

android:state_last

Since: API Level

State value for StateListDrawable.

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

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol state_last.

Related Methods

android:state_middle

Since: API Level

State value for StateListDrawable.

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

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol state_middle.

Related Methods

android:state_pressed

Since: API Level

State value for StateListDrawable.

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

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol state_pressed.

Related Methods

android:state_selected

Since: API Level

State value for StateListDrawable.

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

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol state_selected.

Related Methods

android:state_single

Since: API Level

State value for StateListDrawable.

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

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol state_single.

Related Methods

android:state_window_focused

Since: API Level

State value for StateListDrawable.

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

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol state_window_focused.

Related Methods

android:variablePadding

Since: API Level

If true, allows the drawable's padding to change based on the current state that is selected. If false, the padding will stay the same (based on the maximum padding of all the states). Enabling this feature requires that the owner of the drawable deal with performing layout when the state changes, which is often not supported.

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

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol variablePadding.

Related Methods

android:visible

Since: API Level

Provides initial visibility state of the drawable; the default value is false. See setVisible(boolean, boolean).

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

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

This corresponds to the global attribute resource symbol visible.

Related Methods

Public Constructors

public StateListDrawable ()

Since: API Level 1

Public Methods

public void addState (int[] stateSet, Drawable drawable)

Since: API Level 1

Add a new image/string ID to the set of images.

Parameters

stateSet	- An array of resource Ids to associate with the image. Switch to this image by calling setState().
drawable	-The image to show.

public void inflate (Resources r, XmlPullParser parser, AttributeSet attrs)

Since: API Level 1

Throws

XmlPullParserException
IOException

public boolean isStateful ()

Since: API Level 1

Indicates whether this view 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

True if this view changes its appearance based on state, false otherwise.

public Drawable mutate ()

Since: API Level 3

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

This drawable.

Protected Methods

protected boolean onStateChange (int[] stateSet)

Since: API Level 1

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

Returns

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.

Interfaces

Classes

Enums

StateListDrawable

Class Overview

Summary

XML Attributes

android:constantSize

Related Methods

android:state_active

Related Methods

android:state_checkable

Related Methods

android:state_checked

Related Methods

android:state_enabled

Related Methods

android:state_first

Related Methods

android:state_focused

Related Methods

android:state_last

Related Methods

android:state_middle

Related Methods

android:state_pressed

Related Methods

android:state_selected

Related Methods

android:state_single

Related Methods

android:state_window_focused

Related Methods

android:variablePadding

Related Methods

android:visible

Related Methods

Public Constructors

public StateListDrawable ()

Public Methods

public void addState (int[] stateSet, Drawable drawable)

Parameters

public void inflate (Resources r, XmlPullParser parser, AttributeSet attrs)

Throws

public boolean isStateful ()

Returns

public Drawable mutate ()

Returns

Protected Methods

protected boolean onStateChange (int[] stateSet)

Returns