Android APIs
Summary: Methods | [Expand All]
Added in API level 11
public interface

TypeEvaluator

android.animation.TypeEvaluator<T>
Known Indirect Subclasses

Class Overview

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

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 fraction representing the proportion between the start and end values.

Public Methods

public abstract T evaluate (float fraction, T startValue, T endValue)

Added in API level 14

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 The fraction from the starting to the ending values
startValue The start value.
endValue The end value.
Returns
  • A linear interpolation between the start and end values, given the fraction parameter.