Android APIs
public class

RectEvaluator

extends Object
implements TypeEvaluator<Rect>
java.lang.Object
   ↳ android.animation.RectEvaluator

Class Overview

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.
[Expand]
Inherited Methods
From class java.lang.Object
From interface android.animation.TypeEvaluator

Public Constructors

public RectEvaluator ()

Added in API level 18

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

public RectEvaluator (Rect reuseRect)

Added in API level 21

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

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

Added in API level 18

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.