//安卓11 申请sd卡权限
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
// 先判断有没有权限
if (!Environment.isExternalStorageManager()) {
Intent intent =new Intent(Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION);
intent.setData(Uri.parse("package:" +this.getPackageName()));
startActivityForResult(intent, REQUEST_CODE);
}
｝
