1,可以通过滑动屏幕来显示status bar:
getWindow().getDecorView() .setSystemUiVisibility( View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY | View.INVISIBLE);
2,设置后不能显示status bar.只能重新启动,不过需要在BSP中重新build
getWindow().getDecorView().setSystemUiVisibility( View.STATUS_BAR_DISABLE_EXPAND | View.STATUS_BAR_DISABLE_NOTIFICATION_ICONS | View.STATUS_BAR_DISABLE_NOTIFICATION_ALERTS | View.STATUS_BAR_DISABLE_SYSTEM_INFO | View.STATUS_BAR_DISABLE_HOME | View.STATUS_BAR_DISABLE_RECENT | View.STATUS_BAR_DISABLE_BACK);