设置界面的显示时间

 protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_main);
        new Handler().postDelayed(new Runnable() {

            @Override
            public void run() {
                Intent mainIntent = new Intent(MainActivity.this,
                        ShowActivity.class);
                startActivity(mainIntent);
                finish();
            }
        }, 2000);

   }