在列表視圖中顯示所選專輯的歌曲

Question

我想通過覆蓋當前使用的ListView來顯示所選專輯的歌曲。

但我不明白。在此代碼中，我顯示所有專輯並獲取他們的歌曲。

也許你可以幫我。
非常感謝，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

您使用的代碼是代碼我有，這不是太辛苦，你可能最終不得不確實正在播放的歌曲相比，你可以列出的唯一問題，但其他所有專輯和這樣的歌曲....

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; 

    }