Android应用启动速度优化

public class MainActivity extends Activity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main); //设置layout布居

    // 使用线程异步加载数据，不阻塞界面。
    new Thread(){

      @Override
      public void run() {
        // TODO Auto-generated method stub
        super.run();
        initData();
      }
      
    }.start();
  }

  private final static int MSG_INIT_VIEW = 0xA00;
  private final Handler handler = new Handler() {

    @Override
    public void dispatchMessage(Message msg) {
      switch (msg.what) {
      case MSG_INIT_VIEW:
        initView();
        break;
      default:
        super.dispatchMessage(msg);
      }
      
      
    }
    
  };
  
  private void initData(){
    try {
      Thread.sleep(5000);// 模拟加载数据需要 5秒
    } catch (InterruptedException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    //数据加载完成，可以更新界面了
    handler.sendEmptyMessage(MSG_INIT_VIEW);
  }
  
  private void initView(){
    //TODO 刷新界面
  }

}