使用SYSTEM_UI_FLAG_HIDE_NAVIGATION时首先侦听TouchEvent

@Override
public boolean onTouchEvent(MotionEvent event) {
    // 获取系统服务
    View decorView = getWindow().getDecorView();
    int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                  | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
                  | View.SYSTEM_UI_FLAG_FULLSCREEN;
    decorView.setSystemUiVisibility(uiOptions);

    // 处理触摸事件
    switch(event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            // 用户按下屏幕时隐藏导航栏
            break;
        case MotionEvent.ACTION_UP:
            // 用户抬起屏幕时显示导航栏
            uiOptions = View.SYSTEM_UI_FLAG_VISIBLE;
            decorView.setSystemUiVisibility(uiOptions);
            break;
    }
    return super.onTouchEvent(event);
}