如何在系统 ui 模式更改后更改屏幕覆盖(全屏,隐藏导航)?

How to change Screen overlay after system ui mode changed(Fullscreen, hide navigation)?

我创建叠加层:

mWindowManager = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
    LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    /*The parent view (actually the root view) the will be added in front of all the windows on the screen*/
    mOverlayView = (RelativeLayout) inflater.inflate(R.layout.overlay_control, null);

        mWindowManager.getDefaultDisplay().getSize(size);
        mWindowSize = new Size(size.x, size.y);

    WindowManager.LayoutParams params = new WindowManager.LayoutParams(
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.TYPE_PHONE,
            WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
                    WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH |
                    WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS |
            WindowManager.LayoutParams.FLAG_FULLSCREEN,
            PixelFormat.TRANSLUCENT);
    params.gravity = Gravity.TOP | Gravity.LEFT;
    mWindowManager.addView(mOverlayView, params);

如果系统 UI 可见性发生变化,我需要移动叠加层。有可能检测到它(documentation)以供查看,但它不适用于叠加。所以我只需要回调来检测设备模式是否改变。

我找到了方法:

在 Android 中有 OnSystemUiVisibilityChangeListener,但如果没有具有 match_parent 宽度或高度值的视图,它就不起作用。

所以我创建了这样的叠加层并将其设为 1 px 高度和 match_parent 宽度并向其添加 OnSystemUiVisibilityChangeListener