Added in API level 11
TypeEvaluator
interface TypeEvaluator<T : Any!>
| android.animation.TypeEvaluator |
Interface for use with the ValueAnimator#setEvaluator(TypeEvaluator) function. Evaluators allow developers to create animations on arbitrary property types, by allowing them to supply custom evaluators for types that are not automatically understood and used by the animation system.
Summary
| Public methods | |
|---|---|
| abstract T |
This function returns the result of linearly interpolating the start and end values, with |
Public methods
evaluate
Added in API level 11
abstract fun evaluate(
fraction: Float,
startValue: T,
endValue: T
): T
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 * (x1 - x0), where x0 is startValue, x1 is endValue, and t is fraction.
| Parameters | |
|---|---|
fraction |
Float: The fraction from the starting to the ending values |
startValue |
T: The start value. |
endValue |
T: The end value. |
| Return | |
|---|---|
T |
A linear interpolation between the start and end values, given the fraction parameter. |