FloatArrayEvaluator
class FloatArrayEvaluator : TypeEvaluator<FloatArray!>
kotlin.Any | |
↳ | androidx.core.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 | |
---|---|
<init>() Create a FloatArrayEvaluator that does not reuse the animated value. |
|
<init>(@Nullable reuseArray: FloatArray?) Create a FloatArrayEvaluator that reuses |
Public methods | |
---|---|
FloatArray |
evaluate(fraction: Float, @NonNull startValue: FloatArray, @NonNull endValue: FloatArray) Interpolates the value at each index by the fraction. |
Public constructors
<init>
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
<init>
FloatArrayEvaluator(@Nullable reuseArray: FloatArray?)
Create a FloatArrayEvaluator that reuses reuseArray
for every evaluate() call. Caution must be taken to ensure that the value returned from androidx.core.animation.ValueAnimator#getAnimatedValue()
is not cached, modified, or used across threads. The value will be modified on each evaluate()
call.
Parameters | |
---|---|
reuseArray |
FloatArray?: The array to modify and return from evaluate . |
Public methods
evaluate
@NonNull fun evaluate(
fraction: Float,
@NonNull startValue: FloatArray,
@NonNull endValue: FloatArray
): FloatArray
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 |
FloatArray: The start value. |
endValue |
FloatArray: The end value. |
Return | |
---|---|
FloatArray |
A float[] where each element is an interpolation between the same index in startValue and endValue. |