Android 11 Scoped Storage Permissions

Android 11 Scoped storage permissions

Android 11

If you are targeting Android 11 (targetSdkVersion 30) then you require the following permissions in AndroidManifest.xml for modifying and document access.

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
    android:maxSdkVersion="28" />
<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />

For Android 10 you place the following line in your AndroidManifest.xml tag

android:requestLegacyExternalStorage="true"

the method below checks if the permission is allowed or denied

private boolean checkPermission() {
    if (SDK_INT >= Build.VERSION_CODES.R) {
        return Environment.isExternalStorageManager();
    } else {
        int result = ContextCompat.checkSelfPermission(PermissionActivity.this, READ_EXTERNAL_STORAGE);
        int result1 = ContextCompat.checkSelfPermission(PermissionActivity.this, WRITE_EXTERNAL_STORAGE);
        return result == PackageManager.PERMISSION_GRANTED && result1 == PackageManager.PERMISSION_GRANTED;
    }
}

The below method can be used for requesting a permission in android 11 or below

private void requestPermission() {
    if (SDK_INT >= Build.VERSION_CODES.R) {
        try {
            Intent intent = new Intent(Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION);
            intent.addCategory("android.intent.category.DEFAULT");
            intent.setData(Uri.parse(String.format("package:%s",getApplicationContext().getPackageName())));
            startActivityForResult(intent, 2296);
        } catch (Exception e) {
            Intent intent = new Intent();
            intent.setAction(Settings.ACTION_MANAGE_ALL_FILES_ACCESS_PERMISSION);
            startActivityForResult(intent, 2296);
        }
    } else {
        //below android 11
        ActivityCompat.requestPermissions(PermissionActivity.this, new String[]{WRITE_EXTERNAL_STORAGE}, PERMISSION_REQUEST_CODE);
    }
}

Handling permission callback for Android 11 or above versions

@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == 2296) {
        if (SDK_INT >= Build.VERSION_CODES.R) {
            if (Environment.isExternalStorageManager()) {
                // perform action when allow permission success
            } else {
                Toast.makeText(this, "Allow permission for storage access!", Toast.LENGTH_SHORT).show();
            }
        }
    }
}

Handling permission callback for OS versions below Android 11

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    switch (requestCode) {
        case PERMISSION_REQUEST_CODE:
            if (grantResults.length > 0) {
                boolean READ_EXTERNAL_STORAGE = grantResults[0] == PackageManager.PERMISSION_GRANTED;
                boolean WRITE_EXTERNAL_STORAGE = grantResults[1] == PackageManager.PERMISSION_GRANTED;

                if (READ_EXTERNAL_STORAGE && WRITE_EXTERNAL_STORAGE) {
                    // perform action when allow permission success
                } else {
                    Toast.makeText(this, "Allow permission for storage access!", Toast.LENGTH_SHORT).show();
                }
            }
            break;
    }
}

NOTE: MANAGE_EXTERNAL_STORAGE is a special permission only allowed for few apps like Antivirus, file manager, etc. You have to justify the reason while publishing the app to PlayStore.

Android 11 Write Access to sdcard/Android/someapp

Looks like the bottom line is that you will NOT be able to WRITE to another apps external storage folder (/sdcard/Android/data/com.app.someapp) in And11+

Thanks for the help!

Android 11 not fetching path for file

I have fixed it by fetching path from Google drive

private static String getDriveFilePath(Uri uri, Context context) {
Uri returnUri = uri;
Cursor returnCursor = context.getContentResolver().query(returnUri, null, null, null, null);
/*
 * Get the column indexes of the data in the Cursor,
 *     * move to the first row in the Cursor, get the data,
 *     * and display it.
 * */
int nameIndex = returnCursor.getColumnIndex(OpenableColumns.DISPLAY_NAME);
int sizeIndex = returnCursor.getColumnIndex(OpenableColumns.SIZE);
returnCursor.moveToFirst();

String name = (returnCursor.getString(nameIndex));
String size = (Long.toString(returnCursor.getLong(sizeIndex)));
File file = new File(context.getCacheDir(), name);
try {
    InputStream inputStream = context.getContentResolver().openInputStream(uri);
    FileOutputStream outputStream = new FileOutputStream(file);
    int read = 0;
    int maxBufferSize = 1 * 1024 * 1024;
    int bytesAvailable = inputStream.available();

    //int bufferSize = 1024;
    int bufferSize = Math.min(bytesAvailable, maxBufferSize);

    final byte[] buffers = new byte[bufferSize];
    while ((read = inputStream.read(buffers)) != -1) {
        outputStream.write(buffers, 0, read);
    }
    Log.e("File Size", "Size " + file.length());
    inputStream.close();
    outputStream.close();
    Log.e("File Path", "Path " + file.getPath());
} catch (Exception e) {
    Log.e("Exception", e.getMessage());
}
    return file.getPath();
}     
}

Comprehensive data migration regarding Android 11 scoped storage and compatibility with versions Android 10

replace all Environment.getExternalStorageDirectory() occurences with getExternalFilesDir(subfolderNameInScopedStorage) - this need to be called on Context, so inside Activity, Service or you can obtain Context from e.g. Fragment by using getContext() method

both methods are returning File, which is a directory for storing files (but they have different path ofc), so rest of your code won't change and should work

getExternalFilesDir is in API since Android 4.4, so on older devices you may still use old getExternalStorageDirectory() method, just make an if in proper place - you should have one common (static?) method for obtaining main dir for storing files

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