Android中的动画

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package com.jack.wisdombj;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.view.animation.AlphaAnimation;import android.view.animation.Animation;import android.view.animation.AnimationSet;import android.view.animation.RotateAnimation;import android.view.animation.ScaleAnimation;import android.widget.RelativeLayout;public class SplashActivity extends Activity {private RelativeLayout rlRoot;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_splash);rlRoot = (RelativeLayout) findViewById(R.id.rl_root);startAnim();}// 开启动画private void startAnim() {AnimationSet set = new AnimationSet(false);//旋转RotateAnimation rotate = new RotateAnimation(0, 360,Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,0.5f);rotate.setDuration(1000);rotate.setFillAfter(true);        //缩放ScaleAnimation scale = new ScaleAnimation(0, 1, 0, 1,Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,0.5f);scale.setDuration(1000);scale.setFillAfter(true);//渐变AlphaAnimation alpha =new AlphaAnimation(0, 1);alpha.setDuration(2000);alpha.setFillAfter(true);set.addAnimation(rotate);set.addAnimation(scale);set.addAnimation(alpha);rlRoot.startAnimation(set);}}
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