如何使用 MediaStore 仅显示 mp3 文件？

在我的应用程序中，我使用显示所有音频文件MediaStore and ListAdaptor and CursorLoader。但它显示所有音频文件（m4a、wav、ogg）。我只想显示 mp3 文件。我怎样才能这样做呢？

String[] from = {MediaStore.MediaColumns.TITLE};
int[] to = {android.R.id.text1};

CursorLoader cursorLoader = new CursorLoader(this,sourceUri,null,null,null,MediaStore.Audio.Media.TITLE);
Cursor cursor = cursorLoader.loadInBackground();
startManagingCursor(cursor);
ListAdapter adapter = new SimpleCursorAdapter(this,android.R.layout.simple_list_item_1,cursor,from,to,CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
setListAdapter(adapter);

请尝试下面的代码

ContentResolver cr = context.getContentResolver();

Uri uri = MediaStore.Files.getContentUri("external");

String[] projection = null;

String sortOrder = null;

String selectionMimeType = MediaStore.Files.FileColumns.MIME_TYPE + "=?";

String mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension("mp3"); 

String[] selectionArgsMp3 = new String[]{ mimeType };

Cursor allmp3Files = cr.query(uri, projection, selectionMimeType, selectionArgsmp3, sortOrder);