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Added in API level 11

FloatEvaluator

public class FloatEvaluator
extends Object implements TypeEvaluator<Number>

java.lang.Object
   ↳ android.animation.FloatEvaluator


该评估器可用于执行 float值之间的类型插值。

Summary

Public constructors

FloatEvaluator()

Public methods

Float evaluate(float fraction, Number startValue, Number endValue)

该函数返回开始值和结束值的线性插值结果,其中 fraction表示开始值和结束值之间的比例。

Inherited methods

From class java.lang.Object
From interface android.animation.TypeEvaluator

Public constructors

FloatEvaluator

Added in API level 11
FloatEvaluator ()

Public methods

evaluate

Added in API level 14
Float evaluate (float fraction, 
                Number startValue, 
                Number endValue)

此函数返回开始值和结束值的线性内插结果,其中fraction表示开始值和结束值之间的比例。 该计算是简单的参数的计算: result = x0 + t * (v1 - v0) ,其中x0startValuex1endValue ,和tfraction

Parameters
fraction float: The fraction from the starting to the ending values
startValue Number: The start value; should be of type float or Float
endValue Number: The end value; should be of type float or Float
Returns
Float A linear interpolation between the start and end values, given the fraction parameter.

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