媒體播放器：在它的專輯，顯示歌曲

Question

當我們點擊專輯比它應該顯示在專輯歌曲列表中，我嘗試這樣，但它顯示在SD卡

`私人OnItemClickListener musicgridlistener1 =新OnItemClickListener所有歌曲（）{ 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; 
     } 
    }; 

公共類MusicalbumAdapter_internal延伸BaseAdapter { 私人語境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

當你得到相冊時，你將不得不存儲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; 

album_key是爲sdcard中的任何專輯生成的，並存儲在不同的表中。