ArgbEvaluator

public final class ArgbEvaluator
extends Object implements TypeEvaluator<Integer>

java.lang.Object
   ↳ androidx.core.animation.ArgbEvaluator


This evaluator can be used to perform type interpolation between integer values that represent ARGB colors.

Summary

Public methods

Integer evaluate(float fraction, Integer startValue, Integer endValue)

This function returns the calculated in-between value for a color given integers that represent the start and end values in the four bytes of the 32-bit int.

static ArgbEvaluator getInstance()

Returns an instance of ArgbEvaluator that may be used in ValueAnimator.setEvaluator(TypeEvaluator).

Inherited methods

Public methods

evaluate

public Integer evaluate (float fraction, 
                Integer startValue, 
                Integer endValue)

This function returns the calculated in-between value for a color given integers that represent the start and end values in the four bytes of the 32-bit int. Each channel is separately linearly interpolated and the resulting calculated values are recombined into the return value.

Parameters
fraction float: The fraction from the starting to the ending values

startValue Integer: A 32-bit int value representing colors in the separate bytes of the parameter

endValue Integer: A 32-bit int value representing colors in the separate bytes of the parameter

Returns
Integer A value that is calculated to be the linearly interpolated result, derived by separating the start and end values into separate color channels and interpolating each one separately, recombining the resulting values in the same way.

getInstance

public static ArgbEvaluator getInstance ()

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

Returns
ArgbEvaluator An instance of ArgbEvaluator.