安卓隐藏状态栏和虚拟按键，全屏显示

public void setHideVirtualKey(Window window){
    //保持布局状态
    int uiOptions = View.SYSTEM_UI_FLAG_LAYOUT_STABLE|
            //布局位于状态栏下方
            View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION|
            //全屏
            View.SYSTEM_UI_FLAG_FULLSCREEN|
            //隐藏导航栏
            View.SYSTEM_UI_FLAG_HIDE_NAVIGATION|
            View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN;
    if (Build.VERSION.SDK_INT>=19){
        uiOptions |= 0x00001000;
    }else{
        uiOptions |= View.SYSTEM_UI_FLAG_LOW_PROFILE;
    }
    window.getDecorView().setSystemUiVisibility(uiOptions);
}

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    navView = findViewById(R.id.nav_view);
    setHideVirtualKey(this.getWindow());
    Window window =this.getWindow();
    this.getWindow().getDecorView().setonSystemUiVisibilityChangeListener(new        View.onSystemUiVisibilityChangeListener() {
        @Override
        public void onSystemUiVisibilityChange(int visibility) {
            setHideVirtualKey(window);
        }
    });

}