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FloatArrayEvaluator

public class FloatArrayEvaluator
extends Object implements TypeEvaluator<float[]>

java.lang.Object
   ↳ android.animation.FloatArrayEvaluator


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.

Inherited methods

Public constructors

FloatArrayEvaluator

added in API level 21
public FloatArrayEvaluator ()

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.

FloatArrayEvaluator

added in API level 21
public FloatArrayEvaluator (float[] reuseArray)

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

Parameters
reuseArray float: The array to modify and return from evaluate.

Public methods

evaluate

added in API level 21
public float[] evaluate (float fraction, 
                float[] startValue, 
                float[] endValue)

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 float: The fraction from the starting to the ending values

startValue float: The start value.

endValue float: The end value.

Returns
float[] A float[] where each element is an interpolation between the same index in startValue and endValue.