我想要手机中歌曲的封面专辑,但我得到列索引 -1
int imageColumn = musicCursor.getColumnIndex(MediaStore.Audio.AlbumColumns.ALBUM_ART);
这是完整的代码:
// Retrieve song info from device
public void getSongList() {
String selection = MediaStore.Audio.Media.IS_MUSIC + " != 0";
// Query external audio
ContentResolver musicResolver = getActivity().getContentResolver();
Uri musicUri = android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
Cursor musicCursor = musicResolver.query(musicUri, null, selection, null, null);
// Iterate over results if valid
if (musicCursor != null && musicCursor.moveToFirst()) {
// Get columns
int titleColumn = musicCursor.getColumnIndex
(android.provider.MediaStore.Audio.Media.TITLE);
int idColumn = musicCursor.getColumnIndex
(android.provider.MediaStore.Audio.Media._ID);
int artistColumn = musicCursor.getColumnIndex
(android.provider.MediaStore.Audio.Media.ARTIST);
int durationColumn = musicCursor.getColumnIndex
(MediaStore.Audio.Media.DURATION);
int imageColumn = musicCursor.getColumnIndex
(MediaStore.Audio.AlbumColumns.ALBUM_ART);
// ****** HERE I HAVE -1, the same is with MediaStore.Audio.Albums.ALBUM_ART ******
// Add songs to list
do {
long thisId = musicCursor.getLong(idColumn);
String thisTitle = musicCursor.getString(titleColumn);
String thisArtist = musicCursor.getString(artistColumn);
long thisDuration = musicCursor.getLong(durationColumn);
String thisPathAlbumImage = musicCursor.getString(imageColumn);
// ****** HERE MY APP CRASH FOR -1 INDEX ******
arrayOfSongs.add(new Song(thisId, thisTitle, thisArtist, thisDuration, thisPathAlbumImage));
Log.d(LOG_TAG, "New song added: " + thisTitle);
}
while (musicCursor.moveToNext());
}
}
为什么我得到-1?我希望每个专辑封面都将它们设置在带有歌曲标题、艺术家姓名和持续时间的 ListView 中。