Android APIs
public class

FloatArrayEvaluator

extends Object
implements TypeEvaluator<float[]>
java.lang.Object
   ↳ android.animation.FloatArrayEvaluator

Class Overview

This evaluator can be used to perform type interpolation between float[] values. Each index into the array is treated as a separate value to interpolate. For example, evaluating {100, 200} and {300, 400} will interpolate the value at the first index between 100 and 300 and the value at the second index value between 200 and 400.

Summary

Public Constructors
FloatArrayEvaluator()
Create a FloatArrayEvaluator that does not reuse the animated value.
FloatArrayEvaluator(float[] reuseArray)
Create a FloatArrayEvaluator that reuses reuseArray for every evaluate() call.
Public Methods
float[] evaluate(float fraction, float[] startValue, float[] endValue)
Interpolates the value at each index by the fraction.
[Expand]
Inherited Methods
From class java.lang.Object
From interface android.animation.TypeEvaluator

Public Constructors

public FloatArrayEvaluator ()

Added in API level 21

Create a FloatArrayEvaluator that does not reuse the animated value. Care must be taken when using this option because on every evaluation a new float[] will be allocated.

See Also

public FloatArrayEvaluator (float[] reuseArray)

Added in API level 21

Create a FloatArrayEvaluator that reuses reuseArray for every evaluate() call. Caution must be taken to ensure that the value returned from getAnimatedValue() is not cached, modified, or used across threads. The value will be modified on each evaluate() call.

Parameters
reuseArray The array to modify and return from evaluate.

Public Methods

public float[] evaluate (float fraction, float[] startValue, float[] endValue)

Added in API level 21

Interpolates the value at each index by the fraction. If FloatArrayEvaluator(float[]) was used to construct this object, reuseArray will be returned, otherwise a new float[] will be returned.

Parameters
fraction The fraction from the starting to the ending values
startValue The start value.
endValue The end value.
Returns
  • A float[] where each element is an interpolation between the same index in startValue and endValue.