Question

在我的Android应用程序中，我想在用户长按特定歌曲时从播放列表中删除歌曲。为此，我使用Contentresolver.delete()方法，但它不起作用。既不会抛出错误也不会删除数据？我在这里发布我的代码。请告诉我它为什么不起作用。

代码：

    ContentResolver resolver = DefaultSongList.this.getContentResolver();
    Uri mUri = MediaStore.Audio.Playlists.Members.getContentUri("external",playListId);  
    String audioId = songsList.get(pos).get("id");
    resolver.delete(mUri,MediaStore.Audio.Playlists.Members.AUDIO_ID +" = "+ audioId , null);
    Toast.makeText(DefaultSongList.this, "Song removed from Playlist.", Toast.LENGTH_SHORT).show();

Answer 1

试试这个：

public void removePlaylistMember(Context context, long memberid,
        long mplaylistid) {
    try {
        Uri uri = MediaStore.Audio.Playlists.Members.getContentUri(
                "external", mplaylistid);
        String selection = MediaStore.Audio.Playlists.Members.AUDIO_ID
                + "=?";
        String selectionargs[] = { String.valueOf(memberid) };
        context.getContentResolver().delete(uri, selection, selectionargs);
    } catch (Exception e) {
    }
}

Contentresolver.delete（）无法运行android

1 个答案: