public interface TypeEvaluator
android.animation.TypeEvaluator<T> 
Known Indirect Subclasses 
Interface for use with the 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.
See also:
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 
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. 