Uri albumUri = MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI;//专辑的uri
String[] requestAlbumInfo = {
MediaStore.Audio.Albums._ID,
MediaStore.Audio.Albums.ALBUM_ART,
MediaStore.Audio.Albums.ARTIST,
MediaStore.Audio.Albums.ALBUM };
requestAlbumId = new int[]{//cursors是自己定义的游标
cursors.getColumnIndexOrThrow(MediaStore.Audio.Albums._ID),
cursors.getColumnIndexOrThrow(MediaStore.Audio.Albums.ALBUM_ART),
cursors.getColumnIndexOrThrow(MediaStore.Audio.Albums.ARTIST),
cursors.getColumnIndexOrThrow(MediaStore.Audio.Albums.ALBUM) };
while (cursors.moveToNext()) {//M是自定义的 一个类，设置专辑封面的路径，和专辑的艺术家
m.setAlbumArtPath(cursors.getString(requestAlbumId[1]));
m.setAlbumArtist(cursors.getString(requestAlbumId[2]));
}
结果 得到null，我输出游标的长度是5，我手机里确实5首歌曲。求各路大侠解答？？？？
