为什么 Android 的 MediaStore.Audio.Album.ALBUM_ID 导致 IllegalStateException 错误？

Question

我正在尝试从 MediaStore 获取专辑信息。我可以很容易地获得名称和艺术家，但由于某些原因，ALBUM_ID 列在我尝试访问它时出现错误。

Caused by: java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow.  Make sure the Cursor is initialized correctly before accessing data from it.
at android.database.CursorWindow.nativeGetString(Native Method)
at android.database.CursorWindow.getString(CursorWindow.java:450)
at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:51    )
at android.database.CursorWrapper.getString(CursorWrapper.java:114)
at sage.musicplayer.MainActivity.getAlbumList(MainActivity.java:1540)
at sage.musicplayer.MainActivity.onCreate(MainActivity.java:238)

我似乎找不到解决办法。任何帮助表示赞赏！下面是我必须获取专辑信息并将它们添加到 ArrayList 的方法。

public ArrayList<Album> getAlbumList() {
    ArrayList<Album> temp = new ArrayList<>();

    /*String[] proj = {MediaStore.Audio.Albums.ALBUM_ID,
                    MediaStore.Audio.Albums.ARTIST,
                    MediaStore.Audio.Albums.ALBUM,
                    MediaStore.Audio.Albums.NUMBER_OF_SONGS
    };*/

    Cursor albumCursor = getContentResolver().query(MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI, null, null, null, null);

    if(albumCursor != null && albumCursor.moveToFirst()) {
        int albumName = albumCursor.getColumnIndex(MediaStore.Audio.Albums.ALBUM);
        int albumArtist = albumCursor.getColumnIndex(MediaStore.Audio.Albums.ARTIST);
        int albumID = albumCursor.getColumnIndex(MediaStore.Audio.Albums.ALBUM_ID);

         do {
            String thisAlbumName = albumCursor.getString(albumName);
            String thisAlbumArtist = albumCursor.getString(albumArtist);
            String thisAlbumID = albumCursor.getString(albumID);//this line is giving me an error

            temp.add(new Album(thisAlbumName, thisAlbumArtist, thisAlbumID));
        }while(albumCursor.moveToNext());
    }
    return temp;
}

Answer 1

我也遇到过这个问题。您可以通过更改

轻松解决此问题

int albumID = albumCursor.getColumnIndex(MediaStore.Audio.Albums.ALBUM_ID);

到

int albumID = albumCursor.getColumnIndex(MediaStore.Audio.Albums._ID);

也就是说，您需要在想要 AlbumID 相册时使用 _ID。我不知道为什么 MediaStore 开发人员使用 _ID 而不是 ALBUM_ID 等东西。

为什么 Android 的 MediaStore.Audio.Album.ALBUM_ID 导致 IllegalStateException 错误？

Why is Android's MediaStore.Audio.Album.ALBUM_ID causing an IllegalStateException error?

java

media

android