沉浸式

@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);   /* View decorView = getWindow().getDecorView();    int option = View.SYSTEM_UI_FLAG_FULLSCREEN;    decorView.setSystemUiVisibility(option);    ActionBar actionBar = getSupportActionBar();    actionBar.hide();*/    if (Build.VERSION.SDK_INT >= 21) {        View decorView = getWindow().getDecorView();        int option = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN                | View.SYSTEM_UI_FLAG_LAYOUT_STABLE;        decorView.setSystemUiVisibility(option);        getWindow().setStatusBarColor(Color.TRANSPARENT);    }    ActionBar actionBar = getSupportActionBar();    actionBar.hide();}}