Added in API level 1

public class

RotateDrawable

extends Drawable
implements Drawable.Callback

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

Class Overview

A Drawable that can rotate another Drawable based on the current level value. The start and end angles of rotation can be controlled to map any circular arc to the level values range.

It can be defined in an XML file with the <rotate> element. For more information, see the guide to Animation Resources.

Summary

XML Attributes
Attribute Name	Related Method	Description
android:drawable		Reference to a drawable resource to use for the frame.
android:fromDegrees	setFromDegrees(float)
android:pivotX	setPivotX(float)
android:pivotY	setPivotY(float)
android:toDegrees	setToDegrees(float)
android:visible		Provides initial visibility state of the drawable; the default value is false.

Public Constructors
	RotateDrawable() Create a new rotating drawable with an empty state.

Public Methods
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.
Drawable.ConstantState	getConstantState() Return a `Drawable.ConstantState` instance that holds the shared state of this Drawable.
Drawable	getDrawable()
float	getFromDegrees()
int	getIntrinsicHeight() Return the intrinsic height of the underlying drawable object.
int	getIntrinsicWidth() Return the intrinsic width of the underlying drawable object.
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.
float	getPivotX()
float	getPivotY()
float	getToDegrees()
void	inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Resources.Theme theme) Inflate this Drawable from an XML resource optionally styled by a theme.
void	invalidateDrawable(Drawable who) Called when the drawable needs to be redrawn.
boolean	isPivotXRelative()
boolean	isPivotYRelative()
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 cf) Specify an optional color filter for the drawable.
void	setDrawable(Drawable drawable) Sets the drawable rotated by this RotateDrawable.
void	setFromDegrees(float fromDegrees) Sets the start angle for rotation.
void	setPivotX(float pivotX) Sets the X position around which the drawable is rotated.
void	setPivotXRelative(boolean relative) Sets whether the X pivot value represents a fraction of the drawable width or an absolute value in pixels.
void	setPivotY(float pivotY) Sets the Y position around which the drawable is rotated.
void	setPivotYRelative(boolean relative) Sets whether the Y pivot value represents a fraction of the drawable height or an absolute value in pixels.
void	setToDegrees(float toDegrees) Sets the end angle for rotation.
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)`.

Protected Methods
void	onBoundsChange(Rect bounds) Override this in your subclass to change appearance if you vary based on the bounds.
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.

[Expand]

Inherited Methods

From class android.graphics.drawable.Drawable

void	applyTheme(Resources.Theme t) Applies the specified theme to this Drawable and its children.
boolean	canApplyTheme()
void	clearColorFilter() Removes the color filter for this drawable.
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, Resources.Theme theme) Create a drawable from an XML document using an optional `Resources.Theme`.
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.
static Drawable	createFromXmlInner(Resources r, XmlPullParser parser, AttributeSet attrs, Resources.Theme theme) Create a drawable from inside an XML document using an optional `Resources.Theme`.
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).
int	getAlpha() Gets the current alpha value for the drawable.
final Rect	getBounds() Return the drawable's bounds Rect.
Drawable.Callback	getCallback() Return the current `Drawable.Callback` implementation attached to this 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.
Drawable.ConstantState	getConstantState() Return a `Drawable.ConstantState` instance that holds the shared state of this Drawable.
Drawable	getCurrent()
Rect	getDirtyBounds() Return the drawable's dirty bounds Rect.
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	getOutline(Outline outline) Called to get the drawable to populate the Outline.
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, Resources.Theme theme) Inflate this Drawable from an XML resource optionally styled by a theme.
void	inflate(Resources r, XmlPullParser parser, AttributeSet attrs) Inflate this Drawable from an XML resource.
void	invalidateSelf() Use the current `Drawable.Callback` implementation to have this Drawable redrawn.
boolean	isAutoMirrored() Tells if this Drawable will be automatically mirrored when its layout direction is RTL right-to-left.
boolean	isStateful() Indicates whether this drawable will change its appearance based on state.
final boolean	isVisible()
void	jumpToCurrentState() If this Drawable does transition animations between states, ask that it immediately jump to the current state and skip any active animations.
Drawable	mutate() Make this drawable mutable.
void	onBoundsChange(Rect bounds) Override this in your subclass to change appearance if you vary based on the bounds.
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	setAutoMirrored(boolean mirrored) Set whether this Drawable is automatically mirrored when its layout direction is RTL (right-to left).
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 color filter for the drawable.
void	setColorFilter(int color, PorterDuff.Mode mode) Specify a color and Porter-Duff mode to be the color filter 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).
void	setHotspot(float x, float y) Specifies the hotspot's location within the drawable.
void	setHotspotBounds(int left, int top, int right, int bottom) Sets the bounds to which the hotspot is constrained, if they should be different from the drawable bounds.
final boolean	setLevel(int level) Specify the level for the drawable.
boolean	setState(int[] stateSet) Specify a set of states for the drawable.
void	setTint(ColorStateList tint, PorterDuff.Mode tintMode) Specifies a tint and blending mode for this 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() Invoked when the garbage collector has detected that this instance is no longer reachable.
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.

From interface android.graphics.drawable.Drawable.Callback

XML Attributes

android:drawable

Reference to a drawable resource to use for the frame. If not given, the drawable must be defined by the first child tag.

Must be a reference to another resource, in the form "@[+][package:]type:name" or to a theme attribute in the form "?[package:][type:]name".

This corresponds to the global attribute resource symbol drawable.

Related Methods

android:fromDegrees

Related Methods

setFromDegrees(float)

android:pivotX

Related Methods

setPivotX(float)

android:pivotY

Related Methods

setPivotY(float)

android:toDegrees

Related Methods

setToDegrees(float)

android:visible

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 RotateDrawable ()

Added in API level 1

Create a new rotating drawable with an empty state.

Public Methods

public void draw (Canvas canvas)

Added in API level 1

Draw in its bounds (set via setBounds) respecting optional effects such as alpha (set via setAlpha) and color filter (set via setColorFilter).

Parameters

canvas	The canvas to draw into

public int getAlpha ()

Added in API level 19

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.

public int getChangingConfigurations ()

Added in API level 1

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

Returns a mask of the changing configuration parameters, as defined by Configuration.

public Drawable.ConstantState getConstantState ()

Added in API level 1

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

Returns

The ConstantState associated to that Drawable.

public Drawable getDrawable ()

Added in API level 3

Returns

The drawable rotated by this RotateDrawable

public float getFromDegrees ()

Related XML Attributes

android:fromDegrees

Returns

The starting angle for rotation in degrees

public int getIntrinsicHeight ()

Added in API level 1

Return the intrinsic height of the underlying drawable object. Returns -1 if it has no intrinsic height, such as with a solid color.

public int getIntrinsicWidth ()

Added in API level 1

Return the intrinsic width of the underlying drawable object. Returns -1 if it has no intrinsic width, such as with a solid color.

public int getOpacity ()

Added in API level 1

Return the opacity/transparency of this Drawable. The returned value is one of the abstract format constants in PixelFormat: UNKNOWN, TRANSLUCENT, TRANSPARENT, or OPAQUE.

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 take into account a custom alpha or color filter that has been applied by the client through the setAlpha(int) or setColorFilter(ColorFilter) methods.

Returns

int The opacity class of the Drawable.

public boolean getPadding (Rect padding)

Added in API level 1

Return in padding the insets suggested by this Drawable for placing content inside the drawable's bounds. Positive values move toward the center of the Drawable (set Rect.inset).

Returns

true if this drawable actually has a padding, else false. When false is returned, the padding is always set to 0.

public float getPivotX ()

Related XML Attributes

android:pivotX

Returns

X position around which to rotate

public float getPivotY ()

Related XML Attributes

android:pivotY

Returns

Y position around which to rotate

public float getToDegrees ()

Related XML Attributes

android:toDegrees

Returns

The ending angle for rotation in degrees

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

Inflate this Drawable from an XML resource optionally styled by a theme.

Parameters

r	Resources used to resolve attribute values
parser	XML parser from which to inflate this Drawable
attrs	Base set of attribute values
theme	Theme to apply, may be null

Throws

XmlPullParserException
IOException

public void invalidateDrawable (Drawable who)

Added in API level 1

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	The drawable that is requesting the update.

public boolean isPivotXRelative ()

Returns

True if the X pivot represents a fraction of the drawable width, or false if it represents an absolute value in pixels

public boolean isPivotYRelative ()

Returns

True if the Y pivot represents a fraction of the drawable height, or false if it represents an absolute value in pixels

public boolean isStateful ()

Added in API level 1

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

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

public Drawable mutate ()

Added in 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.

public void scheduleDrawable (Drawable who, Runnable what, long when)

Added in API level 1

A Drawable can call this to schedule the next frame of its animation. An implementation can generally simply call postAtTime(Runnable, Object, long) with the parameters (what, who, when) to perform the scheduling.

Parameters

who	The drawable being scheduled.
what	The action to execute.
when	The time (in milliseconds) to run. The timebase is `uptimeMillis()`

public void setAlpha (int alpha)

Added in API level 1

Specify an alpha value for the drawable. 0 means fully transparent, and 255 means fully opaque.

public void setColorFilter (ColorFilter cf)

Added in API level 1

Specify an optional color filter for the drawable. Pass null to remove any existing color filter.

Parameters

cf	the color filter to apply, or `null` to remove the existing color filter

public void setDrawable (Drawable drawable)

Sets the drawable rotated by this RotateDrawable.

Parameters

drawable	The drawable to rotate

public void setFromDegrees (float fromDegrees)

Sets the start angle for rotation.

Related XML Attributes

android:fromDegrees

Parameters

fromDegrees	Starting angle in degrees

public void setPivotX (float pivotX)

Sets the X position around which the drawable is rotated.

Related XML Attributes

android:pivotX

Parameters

pivotX	X position around which to rotate. If the X pivot is relative, the position represents a fraction of the drawable width. Otherwise, the position represents an absolute value in pixels.

public void setPivotXRelative (boolean relative)

Sets whether the X pivot value represents a fraction of the drawable width or an absolute value in pixels.

Parameters

relative	True if the X pivot represents a fraction of the drawable width, or false if it represents an absolute value in pixels

public void setPivotY (float pivotY)

Sets the Y position around which the drawable is rotated.

Related XML Attributes

android:pivotY

Parameters

pivotY	Y position around which to rotate. If the Y pivot is relative, the position represents a fraction of the drawable height. Otherwise, the position represents an absolute value in pixels.

public void setPivotYRelative (boolean relative)

Sets whether the Y pivot value represents a fraction of the drawable height or an absolute value in pixels.

Parameters

relative	True if the Y pivot represents a fraction of the drawable height, or false if it represents an absolute value in pixels

public void setToDegrees (float toDegrees)

Sets the end angle for rotation.

Related XML Attributes

android:toDegrees

Parameters

toDegrees	Ending angle in degrees

public boolean setVisible (boolean visible, boolean restart)

Added in API level 1

Set whether this Drawable is visible. This generally does not impact the Drawable's behavior, but is a hint that can be used by some Drawables, for example, to decide whether run animations.

Parameters

visible	Set to true if visible, false if not.
restart	You can supply true here to force the drawable to behave as if it has just become visible, even if it had last been set visible. Used for example to force animations to restart.

Returns

boolean Returns true if the new visibility is different than its previous state.

public void unscheduleDrawable (Drawable who, Runnable what)

Added in API level 1

A Drawable can call this to unschedule an action previously scheduled with scheduleDrawable(Drawable, Runnable, long). An implementation can generally simply call removeCallbacks(Runnable, Object) with the parameters (what, who) to unschedule the drawable.

Parameters

who	The drawable being unscheduled.
what	The action being unscheduled.

Protected Methods

protected void onBoundsChange (Rect bounds)

Added in API level 1

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

protected boolean onLevelChange (int level)

Added in API level 1

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

Returns

Returns true if the level 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 level.

protected boolean onStateChange (int[] state)

Added in 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.

Results

Interfaces

Classes

Enums

RotateDrawable

Class Overview

Summary

XML Attributes

android:drawable

Related Methods

android:fromDegrees

Related Methods

android:pivotX

Related Methods

android:pivotY

Related Methods

android:toDegrees

Related Methods

android:visible

Related Methods

Public Constructors

public RotateDrawable ()

Public Methods

public void draw (Canvas canvas)

Parameters

public int getAlpha ()

public int getChangingConfigurations ()

Returns

public Drawable.ConstantState getConstantState ()

Returns

public Drawable getDrawable ()

Returns

public float getFromDegrees ()

Related XML Attributes

Returns

See Also

public int getIntrinsicHeight ()

public int getIntrinsicWidth ()

public int getOpacity ()

Returns

public boolean getPadding (Rect padding)

Returns

public float getPivotX ()

Related XML Attributes

Returns

See Also

public float getPivotY ()

Related XML Attributes

Returns

See Also

public float getToDegrees ()

Related XML Attributes

Returns

See Also

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

Parameters

Throws

public void invalidateDrawable (Drawable who)

Parameters

public boolean isPivotXRelative ()

Returns

See Also

public boolean isPivotYRelative ()

Returns

See Also

public boolean isStateful ()

Returns

public Drawable mutate ()

Returns

public void scheduleDrawable (Drawable who, Runnable what, long when)

Parameters

public void setAlpha (int alpha)

public void setColorFilter (ColorFilter cf)

Parameters

public void setDrawable (Drawable drawable)

Parameters

public void setFromDegrees (float fromDegrees)

Related XML Attributes

Parameters

See Also