在Android 13及以上版本中，访问外部存储器需要使用新的权限模式，即MANAGE_EXTERNAL_STORAGE权限。可以通过以下代码示例来获取该权限：

1. 在AndroidManifest.xml文件中添加以下权限声明：

2. 在Activity中检查该权限是否被授予：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R && !Environment.isExternalStorageManager()) { try { Intent intent = new Intent(Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION); Uri uri = Uri.fromParts("package", getPackageName(), null); intent.setData(uri); startActivity(intent); } catch (ActivityNotFoundException e) { Intent intent = new Intent(); intent.setAction(Settings.ACTION_MANAGE_ALL_FILES_ACCESS_PERMISSION); startActivity(intent); } }

3. 如果权限被拒绝，则可以通过以下代码示例来请求该权限：

private static final int REQUEST_MANAGE_EXTERNAL_STORAGE = 1;

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R && !Environment.isExternalStorageManager()) { Intent intent = new Intent(Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION); Uri uri = Uri.fromParts("package", getPackageName(), null); intent.setData(uri); startActivityForResult(intent, REQUEST_MANAGE_EXTERNAL_STORAGE); }

@Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == REQUEST_MANAGE_EXTERNAL_STORAGE) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R && Environment.isExternalStorageManager()) { // Permission granted } else { // Permission denied } } else { super.onActivityResult(requestCode, resultCode, data); } }