package com.fanliunion.android.app.ui.goldtask.view;
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import android.animation.TypeEvaluator;
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import android.graphics.Point;
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/**
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* 将startValue和endValue强转成Point对象，然后同样根据fraction来计算当前动画的x和y的值，最后组装到一个新的Point对象当中并返回
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*/
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public class PointEvaluator implements TypeEvaluator {
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@Override
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public Object evaluate(float fraction, Object startValue, Object endValue) {
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Point startPoint = (Point) startValue;
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Point endPoint = (Point) endValue;
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float x = startPoint.x + fraction * (endPoint.x - startPoint.x);
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float y = startPoint.y + fraction * (endPoint.y - startPoint.y);
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return new Point((int) x, (int) y);
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}
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}
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