RectEvaluator


public class RectEvaluator
extends Object implements TypeEvaluator<Rect>

java.lang.Object
   ↳ android.animation.RectEvaluator


This evaluator can be used to perform type interpolation between Rect values.

Summary

Public constructors

RectEvaluator()

Construct a RectEvaluator that returns a new Rect on every evaluate call.

RectEvaluator(Rect reuseRect)

Constructs a RectEvaluator that modifies and returns reuseRect in evaluate(float, android.graphics.Rect, android.graphics.Rect) calls.

Public methods

Rect evaluate(float fraction, Rect startValue, Rect endValue)

This function returns the result of linearly interpolating the start and end Rect values, with fraction representing the proportion between the start and end values.

Inherited methods

Object clone()

Creates and returns a copy of this object.

boolean equals(Object obj)

Indicates whether some other object is "equal to" this one.

void finalize()

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.

final Class<?> getClass()

Returns the runtime class of this Object.

int hashCode()

Returns a hash code value for the object.

final void notify()

Wakes up a single thread that is waiting on this object's monitor.

final void notifyAll()

Wakes up all threads that are waiting on this object's monitor.

String toString()

Returns a string representation of the object.

final void wait(long timeoutMillis, int nanos)

Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

final void wait(long timeoutMillis)

Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

final void wait()

Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

abstract Rect evaluate(float fraction, Rect startValue, Rect endValue)

This function returns the result of linearly interpolating the start and end values, with fraction representing the proportion between the start and end values.

Public constructors

RectEvaluator

Added in API level 18
public RectEvaluator ()

Construct a RectEvaluator that returns a new Rect on every evaluate call. To avoid creating an object for each evaluate call, RectEvaluator.RectEvaluator(android.graphics.Rect) should be used whenever possible.

RectEvaluator

Added in API level 21
public RectEvaluator (Rect reuseRect)

Constructs a RectEvaluator that modifies and returns reuseRect in evaluate(float, android.graphics.Rect, android.graphics.Rect) calls. The value returned from evaluate(float, android.graphics.Rect, android.graphics.Rect) should not be cached because it will change over time as the object is reused on each call.

Parameters
reuseRect Rect: A Rect to be modified and returned by evaluate.

Public methods

evaluate

Added in API level 18
public Rect evaluate (float fraction, 
                Rect startValue, 
                Rect endValue)

This function returns the result of linearly interpolating the start and end Rect values, with fraction representing the proportion between the start and end values. The calculation is a simple parametric calculation on each of the separate components in the Rect objects (left, top, right, and bottom).

If RectEvaluator(android.graphics.Rect) was used to construct this RectEvaluator, the object returned will be the reuseRect passed into the constructor.

Parameters
fraction float: The fraction from the starting to the ending values

startValue Rect: The start Rect

endValue Rect: The end Rect

Returns
Rect A linear interpolation between the start and end values, given the fraction parameter.