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

Public constructors

RectEvaluator

added in API level 18
RectEvaluator ()

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.

RectEvaluator

added in API level 21
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
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.