if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.R){
            if (Environment.isExternalStorageManager()) {
                //跳转到设置界面引导用户打开
                val intent = Intent(Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION)
                intent.setData(Uri.parse("package:" + packageName))
                startActivity(intent)
            }else{
              // 有了权限后，在申请读写权限，
            }
        }