Question

当我们点击相册时，它应该显示相册中的歌曲列表，我尝试这样但它会显示SD card中的所有歌曲。

private OnItemClickListener musicgridlistener1 = new OnItemClickListener(){
    public void onItemClick(AdapterView parent, View v, int position,long id)
    {
        System.gc();
        album_column_index1 = musiccursor
                .getColumnIndexOrThrow(MediaStore.Audio.AlbumColumns.ALBUM_ART);
        musiccursor.moveToPosition(position);
        MUSICfilename = musiccursor.getString(album_column_index1);

        Log.i("=======this is file name of album========",""+musiccursor.getCount()+" "+MUSICfilename+"  "+position);

        String[] ablummusicproj = {MediaStore.Audio.Media.DATA,
                MediaStore.Audio.AlbumColumns.ALBUM,
                MediaStore.Audio.AlbumColumns.ARTIST,
                MediaStore.Audio.Media.DISPLAY_NAME};
        final String sortOrder = MediaStore.Audio.Media.ALBUM_KEY + " COLLATE LOCALIZED ASC";
        //final String sortOrder= MediaStore.Audio.Media.ALBUM_KEY + " ASC, "
               // + MediaStore.Audio.Media.TRACK + " ASC, "
              //  + MediaStore.Audio.Media.TITLE_KEY + " ASC";

        Uri uri = android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
        musicAlbum = getBaseContext().getContentResolver().query(uri, ablummusicproj, null, null, sortOrder);
        count = musicAlbum.getCount();
            Log.i("++++++++++ value of album cursor is ",""+count);
        gridmusic = (GridView) findViewById(R.id.gridmusic);
        madAdapter_internal = new MusicalbumAdapter_internal(getApplicationContext());
        gridmusic.setAdapter(madAdapter_internal);
        gridmusic.setOnItemClickListener(musicgridlistener);
        musiccursor=musicAlbum;
    }
};

MusicalbumAdapter_internal班级

public class MusicalbumAdapter_internal extends BaseAdapter {
    private Context maContext;

    public MusicalbumAdapter_internal(Context c) {
        maContext = c;
        Log.i("++++++++++++++++++", "this is context");
    }

    public int getCount() {
        return count;
    }

    public Object getItem(int position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        System.gc();

        TextView tv1 = new TextView(maContext.getApplicationContext());
        String id = null;
        if (convertView == null) {

                music_column_index = musicAlbum.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.DISPLAY_NAME);


                musicAlbum.moveToPosition(position);
            id = musicAlbum.getString(music_column_index);
            //music_column_index = musiccursor
                    //.getColumnIndexOrThrow(MediaStore.Audio.Media.SIZE);
            musicAlbum.moveToPosition(position);
            //id += " Size(KB):" + musiccursor.getString(music_column_index);
            tv1.setLayoutParams(new GridView.LayoutParams(100, 100));
            tv1.setText(id);

        } else
            tv1 = (TextView) convertView;
        return tv1;
    }
}

Answer 1

当你拿到专辑时，你必须存储album_key。

mediaStoreURI = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
            String selection = MediaStore.Audio.Media.ALBUM_KEY + "=?";
            String[] projection = new String[] { MediaStore.Audio.Media.TITLE, MediaStore.Audio.Media.DATA,
                    MediaStore.Audio.Media.ALBUM, MediaStore.Audio.Media.ALBUM_ID, MediaStore.Audio.Media.ARTIST,
                    "strftime(\"%H-%M-%S\", (" + MediaStore.Audio.Media.DURATION + "/1000), \"unixepoch\") as time" };
            String[] selectionArgs = new String[] { ((MediaContainerUSB) currentMediaObject).getUSBGroupingKey() };
            String sortOrder = MediaStore.Audio.Media.TRACK;

在SD卡中为所有专辑生成album_key，并将其存储在不同的表中。

mediaplayer：专辑和显示歌曲

1 个答案: