如何从android中的光标检索图像？ getImageView？-Java 学习之路

我是Android开发的新手，我正在尝试构建一个音乐播放器 . 要在RecyclerView中添加歌曲数据，我创建了一个ArrayList（thisList），其中包含歌曲数据，包括专辑封面，但我无法弄清楚如何将图像添加到列表中:(

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 albumColumn = musicCursor.getColumnIndex
                (MediaStore.Audio.Media.ALBUM);

        int albumArtColumn = musicCursor.getColumnIndex
                (android.provider.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);
            String thisAlbum = musicCursor.getString(albumColumn);

        //ImageView thisAlbumArt = musicCursor. ????

        theList.add(newSong(thisId,thisTitle,
                      thisArtist,thisAlbum,thisAlbumArt));
        }
        while (musicCursor.moveToNext());
    }

1 回答

试试这个：

Cursor artCursor = context.getContentResolver().query(
    MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI,
    new String[] {MediaStore.Audio.AlbumColumns.ALBUM_ART},
    MediaStore.Audio.Media._ID+" =?",
    new String[]{String.valueOf(albumId)},
    null);
String albumArt;
if(artCursor.moveToNext()) {
    albumArt = "file://"+artCursor.getString(0);
} else {
    albumArt = null;
}
artCursor.close();

if(albumArt != null) {
    BitmapFactory.decodeFile(new File(albumArt));
}

回复于 2024-05-19T08:59:21+08:00

如何从android中的光标检索图像？ getImageView？

1 回答

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