TypeEvaluator
public
interface
TypeEvaluator
| android.animation.TypeEvaluator<T> |
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
|
evaluate(float fraction, T startValue, T endValue)
This function returns the result of linearly interpolating the start and end values, with
|
Public methods
evaluate
public abstract T evaluate (float fraction,
T startValue,
T 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. 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. |
| Returns | |
|---|---|
T |
A linear interpolation between the start and end values, given the
fraction parameter. |