public class WelcomeActivity extends Activity { private RelativeLayout rl_welcome_root; private Handler handler = new Handler(){ public void handleMessage(android.os.Message msg) { if(msg.what==1) { startActivity(new Intent(WelcomeActivity.this, SetupGuide1Activity.class)); //关闭自己 finish(); } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_welcome); rl_welcome_root = (RelativeLayout) findViewById(R.id.rl_welcome_root); //显示动画 showAnimation(); //发送延迟3s的消息 handler.sendEmptyMessageDelayed(1, 3000); } /** * 显示动画 * * 旋转动画 RotateAnimation: 0-->360 视图的中心点 2s * 透明度动画 AlphaAnimation: 0-->1 2s * 缩放动画 ScaleAnimation: 0-->1 视图的中心点 2s */ private void showAnimation() { //旋转动画 RotateAnimation: 0-->360 视图的中心点 2s RotateAnimation rotateAnimation = new RotateAnimation(0, 360, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f); rotateAnimation.setDuration(2000); //透明度动画 AlphaAnimation: 0-->1 2s AlphaAnimation alphaAnimation = new AlphaAnimation(0, 1); alphaAnimation.setDuration(2000); //缩放动画 ScaleAnimation: 0-->1 视图的中心点 2s ScaleAnimation scaleAnimation = new ScaleAnimation(0, 1, 0, 1, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f); scaleAnimation.setDuration(2000); //创建复合动画,并添加 AnimationSet animationSet = new AnimationSet(true); animationSet.addAnimation(rotateAnimation); animationSet.addAnimation(alphaAnimation); animationSet.addAnimation(scaleAnimation); //启动 rl_welcome_root.startAnimation(animationSet); }}