com.nineoldandroids.animation
Class IntEvaluator

java.lang.Object
  com.nineoldandroids.animation.IntEvaluator

All Implemented Interfaces:

TypeEvaluator<Integer>

public class IntEvaluator
extends Object
implements TypeEvaluator<Integer>

This evaluator can be used to perform type interpolation between int values.

Constructor Summary

IntEvaluator()

Method Summary

Integer

evaluate(float fraction, Integer startValue, Integer 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.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

IntEvaluator

public IntEvaluator()

Method Detail

evaluate

public Integer evaluate(float fraction,
                        Integer startValue,
                        Integer 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 * (v1 - v0), where x0 is startValue, x1 is endValue, and t is fraction.

Specified by:

evaluate in interface TypeEvaluator<Integer>

Parameters:

fraction - The fraction from the starting to the ending values

startValue - The start value; should be of type int or Integer

endValue - The end value; should be of type int or Integer

Returns:

A linear interpolation between the start and end values, given the fraction parameter.