RectEvaluator

Kotlin |Java

open class RectEvaluator : TypeEvaluator<Rect!>

kotlin.Any
↳	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(reuseRect: Rect!)` Constructs a RectEvaluator that modifies and returns `reuseRect` in `evaluate(float,android.graphics.Rect,android.graphics.Rect)` calls.

Public methods
open Rect!	`evaluate(fraction: Float, startValue: Rect!, endValue: Rect!)` 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.

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#RectEvaluator(android.graphics.Rect) should be used whenever possible.

RectEvaluator

Added in API level 21

RectEvaluator(reuseRect: Rect!)

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

open fun evaluate(
    fraction: Float, 
    startValue: Rect!, 
    endValue: Rect!
): Rect!

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

Return
`Rect!`	A linear interpolation between the start and end values, given the `fraction` parameter.