在列表视图中显示选定专辑的歌曲

Question

我想通过覆盖当前使用的ListView 来显示所选专辑的歌曲。

但我不明白。在这段代码中，我显示所有专辑并获取他们的歌曲。

也许你可以帮助我。
非常感谢，Vinzenz :)

public class Albumsshow extends ListActivity {

public ArrayList<HashMap<String, String>> albumsList = new ArrayList<HashMap<String, String>>();


public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.browse);


    ArrayList<HashMap<String, String>> albumsListData = new ArrayList<HashMap<String, String>>();

    AlbumsManager plm = new AlbumsManager();
    // get all songs from sdcard
    this.albumsList = plm.getAlbumList(this);

    // looping through playlist
    for (int i = 0; i < albumsList.size(); i++) {
        // creating new HashMap
        HashMap<String, String> album = albumsList.get(i);

        // adding HashList to ArrayList
        albumsListData.add(album);
    }

    // Adding menuItems to ListView
    ListAdapter adapter = new SimpleAdapter(this, albumsListData,
            R.layout.playlist_item, new String[] { "album" }, new int[] {
                    R.id.songTitle });

    setListAdapter(adapter);

    // selecting single ListView item
    final ListView lv = getListView();
    final TextView tv =(TextView)findViewById(R.id.umandern);
    // listening to single listitem click
    lv.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) {
            // getting listitem index
            int albumIndex = position;

            String[] column = { MediaStore.Audio.Media.DATA,
                    MediaStore.Audio.Media._ID, MediaStore.Audio.Media.TITLE,
                    MediaStore.Audio.Media.DISPLAY_NAME,
                    MediaStore.Audio.Media.MIME_TYPE, };

            String where = android.provider.MediaStore.Audio.Media.ALBUM + "=?";

            String whereVal[] = {albumsList.get(albumIndex).get("album") };

            String orderBy = android.provider.MediaStore.Audio.Media.TITLE;

            Cursor cursor = managedQuery(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
                    column, where, whereVal, orderBy);

            if (cursor.moveToFirst()) {
                do {
                    Log.v("music title",
                            cursor.getString(cursor
                                    .getColumnIndex(MediaStore.Audio.Media.DISPLAY_NAME)));
                } while (cursor.moveToNext());
            }
    }

    });


}
}

Answer 1

您使用的代码是我拥有的代码，它并不太难，您最终可能遇到的唯一问题是实际播放歌曲，但除此之外，您可以列出所有专辑和这样的歌曲....

  public class AlbumsList extends ListActivity{

public ArrayList<HashMap<String,String>> songsList = new ArrayList<HashMap<String, String>>();
 int count;
 Cursor cursor;
 ListView musiclist;
 int songAlbum;
 int position;
 ListView list;
 String songTitle = "";
 String songPath = "";


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.albums);

    list = (ListView) findViewById(android.R.id.list);


   String[] columns = { BaseColumns._ID,
            AlbumColumns.ALBUM };

        cursor = getContentResolver().query(MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI,
            columns, null, null, null);

        String[] displayFields = new String[] { AlbumColumns.ALBUM };
        int[] displayViews = new int[] { android.R.id.text1 };
        @SuppressWarnings("deprecation")
        ListAdapter adapter = (new SimpleCursorAdapter(this,
            android.R.layout.simple_list_item_1, cursor, displayFields,
            displayViews));
          setListAdapter(adapter);


}
public AlbumsList(){

}
    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
          if(cursor.moveToPosition(position)){

        ArrayList<HashMap<String, String>> songsListData = new ArrayList<HashMap<String, String>>();

         // get all songs from sdcard
        this.songsList = this.getPlayList();


        // looping through playlist
        for (int i = 0; i < songsList.size(); i++) {
            // creating new HashMap
            HashMap<String, String> song = songsList.get(i);

            // adding HashList to ArrayList
            songsListData.add(song);
        }
            ListAdapter adapter = new SimpleAdapter(this, songsListData,
                     android.R.layout.simple_list_item_1, new String[] { "songTitle", "songPath" }, new int[] {
                     android.R.id.text1});

              setListAdapter(adapter);

                ListView lv = getListView();

                // listening to single listitem click
                lv.setOnItemClickListener(new OnItemClickListener() {

                    @Override
                    public void onItemClick(AdapterView<?> parent, View view,
                            int position, long id) {

                        // getting listitem index
                        int songIndex = position;
                        // Starting new intent
                        Intent in = new Intent(AlbumsList.this,
                               MainActivity.class);
                        Log.d("TAG","onItemClick");
                        // Sending songIndex to PlayerActivity
                        in.putExtra("songPath", songIndex);
                        startActivityForResult(in, 99);
                    // Closing PlayListView
                        finish();
                    }
                });
        }
    }

    public ArrayList<HashMap<String, String>> getPlayList(){

         String[] columns = { MediaColumns.DATA,
                  BaseColumns._ID,
                  MediaColumns.TITLE,
                  MediaColumns.MIME_TYPE, };

              String where = AudioColumns.ALBUM
                  + "=?";

              String whereVal[] = { cursor.getString(cursor
                  .getColumnIndex(AlbumColumns.ALBUM))};

              String orderBy = MediaColumns.TITLE;



              cursor = this.getContentResolver().query(
                  MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,columns,
                  where, whereVal, orderBy);

          if (cursor.moveToFirst()) {
                do {

        songTitle = cursor.getString(cursor.getColumnIndexOrThrow(MediaColumns.TITLE));
        songPath = cursor.getString(cursor.getColumnIndexOrThrow(MediaColumns.DATA));


          HashMap<String, String> song = new HashMap<String, String>();


         song.put("songTitle", songTitle);
         song.put("songPath", songPath);
         songsList.add(song);

                } while (cursor.moveToNext());

          }
          cursor.close();
        return songsList;

    }