Andorid 11获取外部存储权限方法

    private void requestmanageexternalstorage_Permission() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
            // 先判断有没有权限
            if (Environment.isExternalStorageManager()) {
                Toast.makeText(this, "Android VERSION  R OR ABOVE，HAVE MANAGE_EXTERNAL_STORAGE GRANTED!", Toast.LENGTH_LONG).show();
            } else {
                Toast.makeText(this, "Android VERSION  R OR ABOVE，NO MANAGE_EXTERNAL_STORAGE GRANTED!", Toast.LENGTH_LONG).show();
                Intent intent = new Intent(Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION);
                intent.setData(Uri.parse("package:" + this.getPackageName()));
                startActivityForResult(intent, 10);
            }
        }
    }

Andorid11之后的外部存储权限的方法