FloatArrayEvaluator

Kotlin |Java

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

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

From interface


        
          android.animation.TypeEvaluator


        abstract
        
        
        
        
        float[]


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

This function returns the result of linearly interpolating the start and end values, with fraction representing the proportion between the start and end values.

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.

See also:

FloatArrayEvaluator(float[])

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.