Fix downloaded item implementation

app/src/main/java/com/cappielloantonio/play/ui/fragment/AlbumPageFragment.java

@@ -92,7 +92,9 @@ public class AlbumPageFragment extends Fragment {
     public boolean onOptionsItemSelected(@NonNull MenuItem item) {
         switch (item.getItemId()) {
             case R.id.action_download_album:
-                DownloadUtil.getDownloadTracker(requireContext()).toggleDownload(albumPageViewModel.getAlbumSongLiveList().getValue());
+                albumPageViewModel.getAlbumSongLiveList().observe(requireActivity(), songs -> {
+                    DownloadUtil.getDownloadTracker(requireContext()).toggleDownload(songs);
+                });
                 return true;
             default:
                 break;

app/src/main/java/com/cappielloantonio/play/ui/fragment/bottomsheetdialog/SongBottomSheetDialog.java

@@ -178,7 +178,7 @@ public class SongBottomSheetDialog extends BottomSheetDialogFragment implements
     }
 
     private void initDownloadedUI() {
-        if (song.isOffline()) {
+        if (DownloadUtil.getDownloadTracker(requireContext()).isDownloaded(song)) {
             download.setText("Remove");
         } else {
             download.setText("Download");