API 26上的覆盖权限错误

Question

当我的应用程序尝试绘制系统覆盖图时，它会崩溃并告诉我2010窗口类型的权限被拒绝。但是，我要求用户在首次安装时在教程活动中授予ACTION_MANAGE_OVERLAY_PERMISSION。此外，这只发生在API 26上。我测试了所有其他支持的SDK，我能够绘制一个没有崩溃或错误的叠加层。

我用过

Settings.canDrawOverlay(context);

然后返回true。因此，似乎系统知道授予许可但问题仍然存在。

以下是重叠代码：

    LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(LAYOUT_INFLATER_SERVICE);
    inflater.inflate(R.layout.view_driving, mRelativeLayout);

    WindowManager.LayoutParams layoutParams = new WindowManager.LayoutParams(
            WindowManager.LayoutParams.MATCH_PARENT,
            WindowManager.LayoutParams.MATCH_PARENT,
            WindowManager.LayoutParams.TYPE_SYSTEM_ERROR,
            WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
            PixelFormat.TRANSLUCENT);

    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP){
        layoutParams.flags = WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS;
    } else{
        layoutParams.flags = WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS;
    }

    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
        layoutParams.flags = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
    }

    int uiOptions = 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 // hide nav bar
            | View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
            | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;

    layoutParams.screenOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;

    mRelativeLayout.setSystemUiVisibility(uiOptions);

    if(Settings.canDrawOverlays(mContext)){
        WindowManager windowManager = (WindowManager) mContext.getSystemService(WINDOW_SERVICE);
        windowManager.addView(mRelativeLayout, layoutParams);  
    }

调用addView时发生崩溃。