FloatEvaluator

Kotlin |Java

class FloatEvaluator : TypeEvaluator<Float!>

kotlin.Any
↳	androidx.core.animation.FloatEvaluator

This evaluator can be used to perform type interpolation between float values.

Summary

Public methods
Float	`evaluate(fraction: Float, @NonNull startValue: Float, @NonNull endValue: Float)` This function returns the result of linearly interpolating the start and end values, with `fraction` representing the proportion between the start and end values.
static FloatEvaluator	`getInstance()` Returns an instance of `FloatEvaluator` that may be used in `ValueAnimator#setEvaluator(TypeEvaluator)`.

Public methods

evaluate

@NonNull fun evaluate(
    fraction: Float, 
    @NonNull startValue: Float, 
    @NonNull endValue: Float
): Float

This function returns the result of linearly interpolating the start and end values, with fraction representing the proportion between the start and end values. The calculation is a simple parametric calculation: result = x0 + t * (v1 - v0), where x0 is startValue, x1 is endValue, and t is fraction.

Parameters
`fraction`	Float: The fraction from the starting to the ending values
`startValue`	Float: The start value; should be of type `float` or `Float`
`endValue`	Float: The end value; should be of type `float` or `Float`

Return
`Float`	A linear interpolation between the start and end values, given the `fraction` parameter.

getInstance

@NonNull static fun getInstance(): FloatEvaluator

Returns an instance of FloatEvaluator that may be used in ValueAnimator#setEvaluator(TypeEvaluator). The same instance may be used in multiple Animators because it holds no state.

Return
`FloatEvaluator`	An instance of `FloatEvaluator`.