Android 添加沉浸式

    @TargetApi(Build.VERSION_CODES.KITKAT)
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.d("MainActivity", "onCreate");
        View decorView = getWindow().getDecorView();
        // Hide the status bar.
        int uiOptions = View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                | View.SYSTEM_UI_FLAG_FULLSCREEN
                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
//                | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
//                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
//                | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
                ;
        decorView.setSystemUiVisibility(uiOptions);

        ....