Outline

extends Object

java.lang.Object
↳	android.graphics.Outline

Class Overview

Defines a simple shape, used for bounding graphical regions.

Can be computed for a View, or computed by a Drawable, to drive the shape of shadows cast by a View, or to clip the contents of the View.

Summary

Public Constructors
	Outline() Constructs an empty Outline.
	Outline(Outline src) Constructs an Outline with a copy of the data in src.

Public Methods
boolean	canClip() Returns whether the outline can be used to clip a View.
float	getAlpha() Returns the alpha represented by the Outline.
boolean	isEmpty() Returns whether the Outline is empty.
void	set(Outline src) Replace the contents of this Outline with the contents of src.
void	setAlpha(float alpha) Sets the alpha represented by the Outline - the degree to which the producer is guaranteed to be opaque over the Outline's shape.
void	setConvexPath(Path convexPath) Sets the Constructs an Outline from a `convex path`.
void	setEmpty() Sets the outline to be empty.
void	setOval(Rect rect) Convenience for `setOval(int, int, int, int)`
void	setOval(int left, int top, int right, int bottom) Sets the outline to the oval defined by input rect.
void	setRect(Rect rect) Convenience for `setRect(int, int, int, int)`
void	setRect(int left, int top, int right, int bottom) Sets the Outline to the rounded rect defined by the input rect, and corner radius.
void	setRoundRect(Rect rect, float radius) Convenience for `setRoundRect(int, int, int, int, float)`
void	setRoundRect(int left, int top, int right, int bottom, float radius) Sets the Outline to the rounded rect defined by the input rect, and corner radius.

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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() 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.

Public Constructors

public Outline ()

Added in API level 21

Constructs an empty Outline. Call one of the setter methods to make the outline valid for use with a View.

public Outline (Outline src)

Added in API level 21

Constructs an Outline with a copy of the data in src.

Public Methods

public boolean canClip ()

Added in API level 21

Returns whether the outline can be used to clip a View.

Currently, only Outlines that can be represented as a rectangle, circle, or round rect support clipping.

public float getAlpha ()

Added in API level 21

Returns the alpha represented by the Outline.

public boolean isEmpty ()

Added in API level 21

Returns whether the Outline is empty.

Outlines are empty when constructed, or if setEmpty() is called, until a setter method is called

public void set (Outline src)

Added in API level 21

Replace the contents of this Outline with the contents of src.

Parameters

src	Source outline to copy from.

public void setAlpha (float alpha)

Added in API level 21

Sets the alpha represented by the Outline - the degree to which the producer is guaranteed to be opaque over the Outline's shape.

An alpha value of 0.0f either represents completely transparent content, or content that isn't guaranteed to fill the shape it publishes.

Content producing a fully opaque (alpha = 1.0f) outline is assumed by the drawing system to fully cover content beneath it, meaning content beneath may be optimized away.