仿电视关机效果的动画
- 效果图
- 主要代码
package com.zhengsonglan.tvanimation;
import android.graphics.Matrix;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.Transformation;
/**
* Created by zsl on 2015/3/27.
*/
public class TVOffAnimation extends Animation {
int halfWidth;
int halfHeight;
@Override
public void initialize(int width, int height, int parentWidth, int parentHeight) {
super.initialize(width, height, parentWidth, parentHeight);
//设置动画时间为700毫秒
setDuration(700);
//设置动画结束后就结束在动画结束的时刻
setFillAfter(true);
//保存View的中心点
halfWidth=width/2;
halfHeight=height/2;
//设置动画先加速后减速
setInterpolator(new AccelerateDecelerateInterpolator());
}@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {final Matrix matrix=t.getMatrix();
//interpolatedTime是从0~1的一个变化，所以我们前80%让动画缩小成一个线，后20%保持线的高度缩小线的宽度
if (interpolatedTime<0.8){
matrix.preScale(1+0.625f*interpolatedTime,1-interpolatedTime/0.8f+0.01f,halfWidth,halfHeight);
}else{
matrix.setScale(7.5f*(1-interpolatedTime),0.01f,halfWidth,halfHeight);
}}
}
- github地址
【Android|仿电视关机效果的动画】点击这里，欢迎Star
