Question

我正在尝试在我的应用中播放歌曲。但我无法从专辑栏目中获得专辑封面。我不想使用MediaMetadataRetriever，因为当我填充列表时它会占用大量内存。这是代码：

 ContentResolver musicResolver = getActivity().getContentResolver();
        Uri musicUri = (MediaStore.Audio.Media.EXTERNAL_CONTENT_URI );

    Cursor musicCursor = musicResolver.query(musicUri, null, null, null, null);

    if(musicCursor!=null && musicCursor.moveToFirst()){

        int titleColumn = musicCursor.getColumnIndex(MediaStore.Audio.Media.TITLE);
        int idColumn = musicCursor.getColumnIndex(MediaStore.Audio.Media._ID);
        int albumArtColumn = musicCursor.getColumnIndex(MediaStore.Audio.AlbumColumns.ALBUM_ART);

            }

我到处寻找它但找不到合适的答案。

下面的光标转储

0 {
_id=11874
_data=/storage/emulated/0/Music/Bang Bang (2014)/01 - Tu Meri - DownloadMing.SE.mp3
_display_name=01 - Tu Meri - DownloadMing.SE.mp3
_size=8349428
mime_type=audio/mpeg
date_added=1437797205
is_drm=0
date_modified=1435229092
title=Tu Meri - DownloadMing.SE
title_key=  O   Q       A   1   K   9       
    /   E   U   C   ?   E   )   /   A   9   C   5   M   1
duration=257149
artist_id=5
composer=Music: Shekhar Ravjiani & Vishal Dadlani | DownloadMing.SE
album_id=5
track=0
year=2014
is_ringtone=0
is_music=1
is_alarm=null
is_notification=0
is_podcast=null
bookmark=null
album_artist=DownloadMing.SE
artist_id:1=5
artist_key= S   9   M   7   )   ?       /   )   /   ?   )   C   9
artist=Vishal Dadlani
album_id:1=5
album_key=  +   )   C   5       +   )   C   5                       462492867
album=Bang Bang (2014)
}
1 {
_id=11875
_data=/storage/emulated/0/Music/Bang Bang (2014)/02 - Meherbaan - DownloadMing.SE.mp3
_display_name=02 - Meherbaan - DownloadMing.SE.mp3
_size=10255537
mime_type=audio/mpeg
date_added=1437797205
is_drm=0
date_modified=1435229093
title=Meherbaan - DownloadMing.SE
title_key=  A   1   7   1   K   +   )   )   C       
    /   E   U   C   ?   E   )   /   A   9   C   5   M   1
duration=307461
artist_id=6
composer=Music: Shekhar Ravjiani & Vishal Dadlani | DownloadMing.SE
album_id=5
track=0
year=2014
is_ringtone=0
is_music=1
is_alarm=null
is_notification=0
is_podcast=null
bookmark=null
album_artist=DownloadMing.SE
artist_id:1=6
artist_key= )   M   7       =   9   C   5       M   7   9   ?   G   )       K   )   E               M   7   1   =   7   )   K       K   )   S   ;   9   )   C   9
artist=Ash King, Shilpa Rao & Shekhar Ravjiani
album_id:1=5
album_key=  +   )   C   5       +   )   C   5                       462492867
album=Bang Bang (2014)
}
2 {
_id=11876
_data=/storage/emulated/0/Music/Bang Bang (2014)/03 - Uff - DownloadMing.SE.mp3
_display_name=03 - Uff - DownloadMing.SE.mp3
_size=9049421
mime_type=audio/mpeg
date_added=1437797205
is_drm=0
date_modified=1435229093
title=Uff - DownloadMing.SE
title_key=  Q   3   3       
    /   E   U   C   ?   E   )   /   A   9   C   5   M   1
duration=272170
artist_id=7
composer=Music: Shekhar Ravjiani & Vishal Dadlani | DownloadMing.SE
album_id=5
track=0
year=2014
is_ringtone=0
is_music=1
is_alarm=null
is_notification=0
is_podcast=null
bookmark=null
album_artist=DownloadMing.SE
artist_id:1=7
artist_key= 7   )   K   M   7   /   1   1   G       =   )   Q   K               +   1   C   C   Y       /   )   Y   )   ?
artist=Harshdeep Kaur & Benny Dayal
album_id:1=5
album_key=  +   )   C   5       +   )   C   5                       462492867
album=Bang Bang (2014)
}
3 {
_id=11877
_data=/storage/emulated/0/Music/Bang Bang (2014)/04 - Bang Bang - DownloadMing.SE.mp3
_display_name=04 - Bang Bang - DownloadMing.SE.mp3
_size=10613831
mime_type=audio/mpeg
date_added=1437797205
is_drm=0
date_modified=1435229094
title=Bang Bang - DownloadMing.SE
title_key=  +   )   C   5       +   )   C   5       
    /   E   U   C   ?   E   )   /   A   9   C   5   M   1
duration=320078
artist_id=8
composer=Music: Shekhar Ravjiani & Vishal Dadlani | DownloadMing.SE
album_id=5
track=0
year=2014
is_ringtone=0
is_music=1
is_alarm=null
is_notification=0
is_podcast=null
bookmark=null
album_artist=DownloadMing.SE
artist_id:1=8
artist_key= +   1   C   C   Y       /   )   Y   )   ?               C   1   1   O   9       A   E   7   )   C
artist=Benny Dayal & Neeti Mohan
album_id:1=5
album_key=  +   )   C   5       +   )   C   5                       462492867
album=Bang Bang (2014)
}
4 {
_id=11878
_data=/storage/emulated/0/Music/Bang Bang (2014)/05 - Meherbaan (Reprise) - DownloadMing.SE.mp3
_display_name=05 - Meherbaan (Reprise) - DownloadMing.SE.mp3
_size=5858173
mime_type=audio/mpeg
date_added=1437797205
is_drm=0
date_modified=1435229095
title=Meherbaan (Reprise) - DownloadMing.SE
title_key=  A   1   7   1   K   +   )   )   C       K   1   G   K   9   M   1       
    /   E   U   C   ?   E   )   /   A   9   C   5   M   1
duration=181551
artist_id=9
composer=Music: Shekhar Ravjiani & Vishal Dadlani | DownloadMing.SE
album_id=5

Answer 1

我收到MediaStore.Audio.AlbumColumns.ALBUM_ART returns -1的原因是因为我已将URI MediaStore.Audio.Media的光标设为MediaStore.Audio.AlbumColumns。

感谢@pskink的帮助。

MediaStore.Audio.AlbumColumns.ALBUM_ART返回-1

1 个答案: