老式电视机关闭的时候画面一闪消失的那个效果:
首先创建一个TVOffAnimation继承于Animation:
import Android.graphics.Matrix; import android.view.animation.AccelerateDecelerateInterpolator; import android.view.animation.Animation; import android.view.animation.Transformation; public class TVOffAnimation extends Animation { private int halfWidth; private int halfHeight; @Override public void initialize(int width, int height, int parentWidth, int parentHeight) { super.initialize(width, height, parentWidth, parentHeight); setDuration(500); setFillAfter(true); //保存View的中心点 halfWidth = width / 2; halfHeight = height / 2; setInterpolator(new AccelerateDecelerateInterpolator()); } @Override protected void applyTransformation(float interpolatedTime, Transformation t) { final Matrix matrix = t.getMatrix(); if (interpolatedTime < 0.8) { matrix.preScale(1+0.625f*interpolatedTime, 1-interpolatedTime/0.8f+0.01f,halfWidth,halfHeight); }else{ matrix.preScale(7.5f*(1-interpolatedTime),0.01f,halfWidth,halfHeight); } } }