@Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.welcome);

    sharedPreferences = MyApplication.getLocalSharedPreferences();

    //		延缓1.5秒进入
    new Handler()
        .postDelayed(
            new Runnable() {

              @Override
              public void run() {

                boolean isFirst = sharedPreferences.getBoolean("isFirst", true);

                if (isFirst) {

                  Editor editor = sharedPreferences.edit();

                  editor.putBoolean("isFirst", false);

                  editor.commit();

                  Intent intent = new Intent();

                  intent.setClass(WelcomActivity.this, IntroduceActivity.class);

                  startActivity(intent);
                } else {

                  Intent intent = new Intent();

                  intent.setClass(WelcomActivity.this, MainUiActivity.class);

                  startActivity(intent);
                }
              }
            },
            1500);
  }