Download entire playlists in separate section

.idea/misc.xml

@@ -88,6 +88,7 @@
         <entry key="app/src/main/res/menu/main_page_menu.xml" value="0.3229166666666667" />
         <entry key="app/src/main/res/menu/playlist_page_menu.xml" value="0.3229166666666667" />
         <entry key="app/src/main/res/menu/toolbar_menu.xml" value="0.3229166666666667" />
+        <entry key="app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml" value="0.28055555555555556" />
       </map>
     </option>
   </component>

app/src/main/java/com/cappielloantonio/play/adapter/PlaylistAdapter.java

@@ -2,7 +2,6 @@ package com.cappielloantonio.play.adapter;
 
 import android.content.Context;
 import android.os.Bundle;
-import android.text.Html;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -13,7 +12,6 @@ import androidx.annotation.NonNull;
 import androidx.navigation.Navigation;
 import androidx.recyclerview.widget.RecyclerView;
 
-import com.bumptech.glide.load.resource.bitmap.RoundedCorners;
 import com.cappielloantonio.play.R;
 import com.cappielloantonio.play.glide.CustomGlideRequest;
 import com.cappielloantonio.play.model.Playlist;
@@ -23,6 +21,7 @@ import com.cappielloantonio.play.util.MusicUtil;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 
 public class PlaylistAdapter extends RecyclerView.Adapter<PlaylistAdapter.ViewHolder> {
     private static final String TAG = "PlaylistAdapter";
@@ -30,14 +29,16 @@ public class PlaylistAdapter extends RecyclerView.Adapter<PlaylistAdapter.ViewHo
     private final MainActivity activity;
     private final Context context;
     private final LayoutInflater mInflater;
+    private final boolean isDownloaded;
 
     private List<Playlist> playlists;
 
-    public PlaylistAdapter(MainActivity activity, Context context) {
+    public PlaylistAdapter(MainActivity activity, Context context, boolean isDownloaded) {
         this.activity = activity;
         this.context = context;
         this.mInflater = LayoutInflater.from(context);
         this.playlists = new ArrayList<>();
+        this.isDownloaded = isDownloaded;
     }
 
     @NonNull
@@ -58,6 +59,8 @@ public class PlaylistAdapter extends RecyclerView.Adapter<PlaylistAdapter.ViewHo
                 .from(context, playlist.getPrimary(), CustomGlideRequest.PLAYLIST_PIC, null)
                 .build()
                 .into(holder.cover);
+
+        if (isDownloaded) holder.textPlaylistSongCount.setVisibility(View.GONE);
     }
 
     @Override
@@ -87,14 +90,21 @@ public class PlaylistAdapter extends RecyclerView.Adapter<PlaylistAdapter.ViewHo
             cover = itemView.findViewById(R.id.playlist_cover_image_view);
 
             itemView.setOnClickListener(this);
-            itemView.setOnLongClickListener(this);
+            if (!isDownloaded) itemView.setOnLongClickListener(this);
         }
 
         @Override
         public void onClick(View view) {
             Bundle bundle = new Bundle();
             bundle.putParcelable("playlist_object", playlists.get(getBindingAdapterPosition()));
-            Navigation.findNavController(view).navigate(R.id.action_libraryFragment_to_playlistPageFragment, bundle);
+
+            if (Objects.requireNonNull(Navigation.findNavController(view).getCurrentDestination()).getId() == R.id.libraryFragment) {
+                bundle.putBoolean("is_offline", false);
+                Navigation.findNavController(view).navigate(R.id.action_libraryFragment_to_playlistPageFragment, bundle);
+            } else if (Objects.requireNonNull(Navigation.findNavController(view).getCurrentDestination()).getId() == R.id.downloadFragment) {
+                bundle.putBoolean("is_offline", true);
+                Navigation.findNavController(view).navigate(R.id.action_downloadFragment_to_playlistPageFragment, bundle);
+            }
         }
 
         @Override

app/src/main/java/com/cappielloantonio/play/adapter/PlaylistCatalogueAdapter.java

@@ -35,6 +35,9 @@ public class PlaylistCatalogueAdapter extends RecyclerView.Adapter<PlaylistCatal
     private final LayoutInflater mInflater;
     private final MainActivity activity;
     private final Context context;
+    private final boolean isOffline;
+
+
     private final Filter filtering = new Filter() {
         @Override
         protected FilterResults performFiltering(CharSequence constraint) {
@@ -69,11 +72,12 @@ public class PlaylistCatalogueAdapter extends RecyclerView.Adapter<PlaylistCatal
     private List<Playlist> playlists;
     private List<Playlist> playlistsFull;
 
-    public PlaylistCatalogueAdapter(MainActivity activity, Context context) {
+    public PlaylistCatalogueAdapter(MainActivity activity, Context context, boolean isOffline) {
         this.activity = activity;
         this.context = context;
         this.mInflater = LayoutInflater.from(context);
         this.playlists = new ArrayList<>();
+        this.isOffline = isOffline;
     }
 
     @NonNull
@@ -133,6 +137,8 @@ public class PlaylistCatalogueAdapter extends RecyclerView.Adapter<PlaylistCatal
         public void onClick(View view) {
             Bundle bundle = new Bundle();
             bundle.putParcelable("playlist_object", playlists.get(getBindingAdapterPosition()));
+            bundle.putBoolean("is_offline", isOffline);
+
             Navigation.findNavController(view).navigate(R.id.action_playlistCatalogueFragment_to_playlistPageFragment, bundle);
 
             InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);

app/src/main/java/com/cappielloantonio/play/database/AppDatabase.java

@@ -15,7 +15,7 @@ import com.cappielloantonio.play.model.Queue;
 import com.cappielloantonio.play.model.RecentSearch;
 import com.cappielloantonio.play.model.Server;
 
-@Database(entities = {Queue.class, Server.class, RecentSearch.class, Download.class}, version = 17, exportSchema = false)
+@Database(entities = {Queue.class, Server.class, RecentSearch.class, Download.class}, version = 23, exportSchema = false)
 public abstract class AppDatabase extends RoomDatabase {
     private static final String TAG = "AppDatabase";
 

app/src/main/java/com/cappielloantonio/play/database/dao/DownloadDao.java

@@ -15,12 +15,15 @@ public interface DownloadDao {
     @Query("SELECT * FROM download WHERE server=:server")
     LiveData<List<Download>> getAll(String server);
 
-    @Query("SELECT * FROM download WHERE server=:server GROUP BY artistName LIMIT :size")
+    @Query("SELECT * FROM download WHERE server=:server AND playlistId IS NULL GROUP BY artistName LIMIT :size")
     LiveData<List<Download>> getSampleArtist(int size, String server);
 
-    @Query("SELECT * FROM download WHERE server=:server GROUP BY albumName LIMIT :size")
+    @Query("SELECT * FROM download WHERE server=:server AND playlistId IS NULL GROUP BY albumName LIMIT :size")
     LiveData<List<Download>> getSampleAlbum(int size, String server);
 
+    @Query("SELECT * FROM download WHERE server=:server AND playlistId IS NOT NULL GROUP BY playlistId LIMIT :size")
+    LiveData<List<Download>> getSamplePlaylist(int size, String server);
+
     @Query("SELECT * FROM download WHERE server=:server LIMIT :size")
     LiveData<List<Download>> getSample(int size, String server);
 
@@ -30,14 +33,20 @@ public interface DownloadDao {
     @Query("SELECT * FROM download WHERE server=:server AND albumId=:albumId")
     LiveData<List<Download>> getAllFromAlbum(String server, String albumId);
 
+    @Query("SELECT * FROM download WHERE server=:server AND playlistId=:playlistId")
+    LiveData<List<Download>> getAllFromPlaylist(String server, String playlistId);
+
+    @Query("SELECT * FROM download WHERE server=:server AND playlistId IS NOT NULL GROUP BY playlistId")
+    LiveData<List<Download>> getAllPlaylists(String server);
+
     @Insert(onConflict = OnConflictStrategy.REPLACE)
     void insert(Download download);
 
     @Insert(onConflict = OnConflictStrategy.REPLACE)
     void insertAll(List<Download> downloads);
 
-    @Query("DELETE FROM download WHERE id = :id")
+    @Query("DELETE FROM download WHERE songId = :songId")
-    void delete(String id);
+    void delete(String songId);
 
     @Query("DELETE FROM download WHERE server=:server")
     void deleteAll(String server);

app/src/main/java/com/cappielloantonio/play/model/Download.java

@@ -9,11 +9,16 @@ import com.cappielloantonio.play.App;
 import com.cappielloantonio.play.util.MusicUtil;
 import com.cappielloantonio.play.util.PreferenceUtil;
 
+import java.util.UUID;
+
 @Entity(tableName = "download")
 public class Download {
     @NonNull
     @PrimaryKey
     @ColumnInfo(name = "id")
+    private String id;
+
+    @ColumnInfo(name = "songId")
     private String songID;
 
     @ColumnInfo(name = "title")
@@ -43,7 +48,14 @@ public class Download {
     @ColumnInfo(name = "server")
     private String server;
 
-    public Download(@NonNull String songID, String title, String albumId, String albumName, String artistId, String artistName, int trackNumber, String primary, long duration, String server) {
+    @ColumnInfo(name = "playlistId")
+    private String playlistId;
+
+    @ColumnInfo(name = "playlistName")
+    private String playlistName;
+
+    public Download(@NonNull String id, String songID, String title, String albumId, String albumName, String artistId, String artistName, int trackNumber, String primary, long duration, String server, String playlistId, String playlistName) {
+        this.id = id;
         this.songID = songID;
         this.title = title;
         this.albumId = albumId;
@@ -54,9 +66,12 @@ public class Download {
         this.primary = primary;
         this.duration = duration;
         this.server = server;
+        this.playlistId = playlistId;
+        this.playlistName = playlistName;
     }
 
-    public Download(Song song) {
+    public Download(Song song, String playlistId, String playlistName) {
+        this.id = UUID.randomUUID().toString();
         this.songID = song.getId();
         this.title = song.getTitle();
         this.albumId = song.getAlbumId();
@@ -67,14 +82,24 @@ public class Download {
         this.primary = song.getPrimary();
         this.duration = song.getDuration();
         this.server = PreferenceUtil.getInstance(App.getInstance()).getServerId();
+        this.playlistId = playlistId;
+        this.playlistName = playlistName;
     }
 
     @NonNull
+    public String getId() {
+        return id;
+    }
+
+    public void setId(@NonNull String id) {
+        this.id = id;
+    }
+
     public String getSongID() {
         return songID;
     }
 
-    public void setSongID(@NonNull String songID) {
+    public void setSongID(String songID) {
         this.songID = songID;
     }
 
@@ -149,4 +174,20 @@ public class Download {
     public void setServer(String server) {
         this.server = server;
     }
+
+    public String getPlaylistId() {
+        return playlistId;
+    }
+
+    public void setPlaylistId(String playlistId) {
+        this.playlistId = playlistId;
+    }
+
+    public String getPlaylistName() {
+        return playlistName;
+    }
+
+    public void setPlaylistName(String playlistName) {
+        this.playlistName = playlistName;
+    }
 }

app/src/main/java/com/cappielloantonio/play/model/Playlist.java

@@ -4,6 +4,9 @@ import android.os.Parcel;
 import android.os.Parcelable;
 
 public class Playlist implements Parcelable {
+    public static final String ALL = "ALL";
+    public static final String DOWNLOADED = "DOWNLOADED";
+
     private String id;
     private String name;
     private String primary;
@@ -20,6 +23,11 @@ public class Playlist implements Parcelable {
         this.duration = playlist.getDuration();
     }
 
+    public Playlist(String id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
     public String getId() {
         return id;
     }

app/src/main/java/com/cappielloantonio/play/repository/DownloadRepository.java

@@ -26,10 +26,11 @@ public class DownloadRepository {
         return downloadDao.getAll(PreferenceUtil.getInstance(App.getInstance()).getServerId());
     }
 
-    public LiveData<List<Download>> getLiveDownloadSample(int size, boolean isArtist, boolean isAlbum, boolean isTrack) {
+    public LiveData<List<Download>> getLiveDownloadSample(int size, boolean isArtist, boolean isAlbum, boolean isTrack, boolean isPlaylist) {
         if (isArtist) return downloadDao.getSampleArtist(size, PreferenceUtil.getInstance(App.getInstance()).getServerId());
         else if (isAlbum) return downloadDao.getSampleAlbum(size, PreferenceUtil.getInstance(App.getInstance()).getServerId());
         else if (isTrack) return downloadDao.getSample(size, PreferenceUtil.getInstance(App.getInstance()).getServerId());
+        else if (isPlaylist) return downloadDao.getSamplePlaylist(size, PreferenceUtil.getInstance(App.getInstance()).getServerId());
         else return downloadDao.getSample(size, PreferenceUtil.getInstance(App.getInstance()).getServerId());
     }
 
@@ -41,6 +42,14 @@ public class DownloadRepository {
         return downloadDao.getAllFromAlbum(PreferenceUtil.getInstance(App.getInstance()).getServerId(), albumId);
     }
 
+    public LiveData<List<Download>> getLiveDownloadFromPlaylist(String playlistId) {
+        return downloadDao.getAllFromPlaylist(PreferenceUtil.getInstance(App.getInstance()).getServerId(), playlistId);
+    }
+
+    public LiveData<List<Download>> getLivePlaylist() {
+        return downloadDao.getAllPlaylists(PreferenceUtil.getInstance(App.getInstance()).getServerId());
+    }
+
     public void insert(Download download) {
         InsertThreadSafe insert = new InsertThreadSafe(downloadDao, download);
         Thread thread = new Thread(insert);

app/src/main/java/com/cappielloantonio/play/service/DownloadTracker.java

@@ -87,17 +87,18 @@ public class DownloadTracker {
         return new DownloadRequest.Builder(id, uri).build();
     }
 
-    public void download(List<Song> songs) {
+    public void download(List<Song> songs, String playlistId, String playlistName) {
         DownloadRepository downloadRepository = new DownloadRepository(App.getInstance());
 
         for (Song song : songs) {
             if(isDownloaded(song)) {
+                downloadRepository.insert(MappingUtil.mapToDownload(song, playlistId, playlistName));
                 continue;
             }
 
             MediaItem mediaItem = MusicUtil.getMediaItemFromSong(song);
             DownloadService.sendAddDownload(context, DownloaderService.class, getDownloadRequest(song.getId(), checkNotNull(mediaItem.playbackProperties).uri), false);
-            downloadRepository.insert(MappingUtil.mapToDownload(song));
+            downloadRepository.insert(MappingUtil.mapToDownload(song, playlistId, playlistName));
         }
     }
 
@@ -111,7 +112,7 @@ public class DownloadTracker {
 
             if (download != null && download.state != Download.STATE_FAILED) {
                 DownloadService.sendRemoveDownload(context, DownloaderService.class, download.request.id, false);
-                downloadRepository.delete(MappingUtil.mapToDownload(song));
+                downloadRepository.delete(MappingUtil.mapToDownload(song, null, null));
             }
         }
     }

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

@@ -91,14 +91,11 @@ public class AlbumPageFragment extends Fragment {
 
     @Override
     public boolean onOptionsItemSelected(@NonNull MenuItem item) {
-        switch (item.getItemId()) {
+        if (item.getItemId() == R.id.action_download_album) {
-            case R.id.action_download_album:
+            albumPageViewModel.getAlbumSongLiveList(requireActivity()).observe(requireActivity(), songs -> {
-                albumPageViewModel.getAlbumSongLiveList(requireActivity()).observe(requireActivity(), songs -> {
+                DownloadUtil.getDownloadTracker(requireContext()).download(songs, null, null);
-                    DownloadUtil.getDownloadTracker(requireContext()).download(songs);
+            });
-                });
+            return true;
-                return true;
-            default:
-                break;
         }
 
         return false;

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

@@ -12,35 +12,27 @@ import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.core.view.ViewCompat;
 import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.recyclerview.widget.GridLayoutManager;
-import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.PagerSnapHelper;
 import androidx.recyclerview.widget.SnapHelper;
 import androidx.viewpager2.widget.ViewPager2;
 
 import com.cappielloantonio.play.R;
-import com.cappielloantonio.play.adapter.AlbumAdapter;
 import com.cappielloantonio.play.adapter.AlbumHorizontalAdapter;
-import com.cappielloantonio.play.adapter.ArtistAdapter;
 import com.cappielloantonio.play.adapter.ArtistHorizontalAdapter;
-import com.cappielloantonio.play.adapter.DiscoverSongAdapter;
+import com.cappielloantonio.play.adapter.PlaylistAdapter;
-import com.cappielloantonio.play.adapter.SimilarTrackAdapter;
 import com.cappielloantonio.play.adapter.SongHorizontalAdapter;
-import com.cappielloantonio.play.adapter.TrackAdapter;
-import com.cappielloantonio.play.adapter.YearAdapter;
 import com.cappielloantonio.play.databinding.FragmentDownloadBinding;
-import com.cappielloantonio.play.databinding.FragmentHomeBinding;
-import com.cappielloantonio.play.helper.recyclerview.CustomLinearSnapHelper;
 import com.cappielloantonio.play.helper.recyclerview.DotsIndicatorDecoration;
 import com.cappielloantonio.play.model.Album;
 import com.cappielloantonio.play.model.Artist;
+import com.cappielloantonio.play.model.Playlist;
 import com.cappielloantonio.play.model.Song;
 import com.cappielloantonio.play.ui.activity.MainActivity;
-import com.cappielloantonio.play.util.MappingUtil;
 import com.cappielloantonio.play.util.UIUtil;
 import com.cappielloantonio.play.viewmodel.DownloadViewModel;
-import com.cappielloantonio.play.viewmodel.HomeViewModel;
 
 import java.util.Objects;
 
@@ -54,6 +46,7 @@ public class DownloadFragment extends Fragment {
     private ArtistHorizontalAdapter downloadedArtistAdapter;
     private AlbumHorizontalAdapter downloadedAlbumAdapter;
     private SongHorizontalAdapter downloadedTrackAdapter;
+    private PlaylistAdapter playlistAdapter;
 
     @Override
     public void onCreate(@Nullable Bundle savedInstanceState) {
@@ -89,6 +82,8 @@ public class DownloadFragment extends Fragment {
         initDownloadedArtistView();
         initDownloadedAlbumView();
         initDownloadedSongView();
+        initDownloadedPlaylistSlideView();
+        initPlaceholder();
     }
 
     @Override
@@ -138,6 +133,12 @@ public class DownloadFragment extends Fragment {
             bundle.putString(Song.DOWNLOADED, Song.DOWNLOADED);
             activity.navController.navigate(R.id.action_downloadFragment_to_songListPageFragment, bundle);
         });
+
+        bind.downloadedPlaylistTextViewClickable.setOnClickListener(v -> {
+            Bundle bundle = new Bundle();
+            bundle.putString(Playlist.DOWNLOADED, Playlist.DOWNLOADED);
+            activity.navController.navigate(R.id.action_downloadFragment_to_playlistCatalogueFragment, bundle);
+        });
     }
 
     private void initAppBar() {
@@ -155,12 +156,10 @@ public class DownloadFragment extends Fragment {
                 if (bind != null) bind.downloadDownloadedArtistPlaceholder.placeholder.setVisibility(View.VISIBLE);
                 if (bind != null) bind.downloadDownloadedArtistSector.setVisibility(View.GONE);
             } else {
-                if (bind != null && !artists.isEmpty()) bind.emptyDownloadLayout.setVisibility(View.GONE);
-                if (bind != null && !artists.isEmpty()) bind.fragmentDownloadNestedScrollView.setVisibility(View.VISIBLE);
-
                 if (bind != null) bind.downloadDownloadedArtistPlaceholder.placeholder.setVisibility(View.GONE);
                 if (bind != null) bind.downloadDownloadedArtistSector.setVisibility(!artists.isEmpty() ? View.VISIBLE : View.GONE);
-                if (bind != null) bind.downloadedArtistRecyclerView.setLayoutManager(new GridLayoutManager(requireContext(), UIUtil.getSpanCount(artists.size(), 5), GridLayoutManager.HORIZONTAL, false));
+                if (bind != null)
+                    bind.downloadedArtistRecyclerView.setLayoutManager(new GridLayoutManager(requireContext(), UIUtil.getSpanCount(artists.size(), 5), GridLayoutManager.HORIZONTAL, false));
 
                 downloadedArtistAdapter.setItems(artists);
             }
@@ -189,12 +188,10 @@ public class DownloadFragment extends Fragment {
                 if (bind != null) bind.downloadDownloadedAlbumPlaceholder.placeholder.setVisibility(View.VISIBLE);
                 if (bind != null) bind.downloadDownloadedAlbumSector.setVisibility(View.GONE);
             } else {
-                if (bind != null && !albums.isEmpty()) bind.emptyDownloadLayout.setVisibility(View.GONE);
-                if (bind != null && !albums.isEmpty()) bind.fragmentDownloadNestedScrollView.setVisibility(View.VISIBLE);
-
                 if (bind != null) bind.downloadDownloadedAlbumPlaceholder.placeholder.setVisibility(View.GONE);
                 if (bind != null) bind.downloadDownloadedAlbumSector.setVisibility(!albums.isEmpty() ? View.VISIBLE : View.GONE);
-                if (bind != null) bind.downloadedAlbumRecyclerView.setLayoutManager(new GridLayoutManager(requireContext(), UIUtil.getSpanCount(albums.size(), 5), GridLayoutManager.HORIZONTAL, false));
+                if (bind != null)
+                    bind.downloadedAlbumRecyclerView.setLayoutManager(new GridLayoutManager(requireContext(), UIUtil.getSpanCount(albums.size(), 5), GridLayoutManager.HORIZONTAL, false));
 
                 downloadedAlbumAdapter.setItems(albums);
             }
@@ -223,12 +220,10 @@ public class DownloadFragment extends Fragment {
                 if (bind != null) bind.downloadDownloadedTracksPlaceholder.placeholder.setVisibility(View.VISIBLE);
                 if (bind != null) bind.downloadDownloadedTracksSector.setVisibility(View.GONE);
             } else {
-                if (bind != null && !songs.isEmpty()) bind.emptyDownloadLayout.setVisibility(View.GONE);
-                if (bind != null && !songs.isEmpty()) bind.fragmentDownloadNestedScrollView.setVisibility(View.VISIBLE);
-
                 if (bind != null) bind.downloadDownloadedTracksPlaceholder.placeholder.setVisibility(View.GONE);
                 if (bind != null) bind.downloadDownloadedTracksSector.setVisibility(!songs.isEmpty() ? View.VISIBLE : View.GONE);
-                if (bind != null) bind.downloadedTracksRecyclerView.setLayoutManager(new GridLayoutManager(requireContext(), UIUtil.getSpanCount(songs.size(), 5), GridLayoutManager.HORIZONTAL, false));
+                if (bind != null)
+                    bind.downloadedTracksRecyclerView.setLayoutManager(new GridLayoutManager(requireContext(), UIUtil.getSpanCount(songs.size(), 5), GridLayoutManager.HORIZONTAL, false));
 
                 downloadedTrackAdapter.setItems(songs);
             }
@@ -246,4 +241,60 @@ public class DownloadFragment extends Fragment {
                         requireContext().getResources().getColor(R.color.titleTextColor, null))
         );
     }
+
+    private void initDownloadedPlaylistSlideView() {
+        bind.downloadedPlaylistViewPager.setOrientation(ViewPager2.ORIENTATION_HORIZONTAL);
+
+        playlistAdapter = new PlaylistAdapter(activity, requireContext(), true);
+        bind.downloadedPlaylistViewPager.setAdapter(playlistAdapter);
+        bind.downloadedPlaylistViewPager.setOffscreenPageLimit(3);
+        downloadViewModel.getDownloadedPlaylists(requireActivity(), 5).observe(requireActivity(), playlists -> {
+            if (playlists == null) {
+                if (bind != null) bind.downloadDownloadedPlaylistPlaceholder.placeholder.setVisibility(View.VISIBLE);
+                if (bind != null) bind.downloadDownloadedPlaylistSector.setVisibility(View.GONE);
+            } else {
+                if (bind != null) bind.downloadDownloadedPlaylistPlaceholder.placeholder.setVisibility(View.GONE);
+                if (bind != null) bind.downloadDownloadedPlaylistSector.setVisibility(!playlists.isEmpty() ? View.VISIBLE : View.GONE);
+
+                playlistAdapter.setItems(playlists);
+            }
+        });
+
+        setSlideViewOffset(20, 16);
+    }
+
+    private void setSlideViewOffset(float pageOffset, float pageMargin) {
+        bind.downloadedPlaylistViewPager.setPageTransformer((page, position) -> {
+            float myOffset = position * -(2 * pageOffset + pageMargin);
+            if (bind.downloadedPlaylistViewPager.getOrientation() == ViewPager2.ORIENTATION_HORIZONTAL) {
+                if (ViewCompat.getLayoutDirection(bind.downloadedPlaylistViewPager) == ViewCompat.LAYOUT_DIRECTION_RTL) {
+                    page.setTranslationX(-myOffset);
+                } else {
+                    page.setTranslationX(myOffset);
+                }
+            } else {
+                page.setTranslationY(myOffset);
+            }
+        });
+    }
+
+    private void initPlaceholder() {
+        FragmentActivity requiredActivity = getActivity();
+
+        if (requiredActivity != null) {
+            downloadViewModel.getDownloadedTracks(requiredActivity, 20).observe(requiredActivity, songs ->
+                    downloadViewModel.getDownloadedAlbums(requiredActivity, 20).observe(requiredActivity, albums ->
+                            downloadViewModel.getDownloadedArtists(requiredActivity, 20).observe(requiredActivity, artists -> {
+                                if ((songs != null && !songs.isEmpty()) || (albums != null && !albums.isEmpty()) || (artists != null && !artists.isEmpty())) {
+                                    if (bind != null) bind.emptyDownloadLayout.setVisibility(View.GONE);
+                                    if (bind != null) bind.fragmentDownloadNestedScrollView.setVisibility(View.VISIBLE);
+                                } else {
+                                    if (bind != null) bind.emptyDownloadLayout.setVisibility(View.VISIBLE);
+                                    if (bind != null) bind.fragmentDownloadNestedScrollView.setVisibility(View.GONE);
+                                }
+                            })
+                    )
+            );
+        }
+    }
 }

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

@@ -28,6 +28,7 @@ import com.cappielloantonio.play.adapter.PlaylistAdapter;
 import com.cappielloantonio.play.databinding.FragmentLibraryBinding;
 import com.cappielloantonio.play.helper.recyclerview.CustomLinearSnapHelper;
 import com.cappielloantonio.play.helper.recyclerview.DotsIndicatorDecoration;
+import com.cappielloantonio.play.model.Playlist;
 import com.cappielloantonio.play.model.Song;
 import com.cappielloantonio.play.ui.activity.MainActivity;
 import com.cappielloantonio.play.util.UIUtil;
@@ -118,7 +119,11 @@ public class LibraryFragment extends Fragment {
         bind.albumCatalogueTextViewClickable.setOnClickListener(v -> activity.navController.navigate(R.id.action_libraryFragment_to_albumCatalogueFragment));
         bind.artistCatalogueTextViewClickable.setOnClickListener(v -> activity.navController.navigate(R.id.action_libraryFragment_to_artistCatalogueFragment));
         bind.genreCatalogueTextViewClickable.setOnClickListener(v -> activity.navController.navigate(R.id.action_libraryFragment_to_genreCatalogueFragment));
-        bind.playlistCatalogueTextViewClickable.setOnClickListener(v -> activity.navController.navigate(R.id.action_libraryFragment_to_playlistCatalogueFragment));
+        bind.playlistCatalogueTextViewClickable.setOnClickListener(v -> {
+            Bundle bundle = new Bundle();
+            bundle.putString(Playlist.ALL, Playlist.ALL);
+            activity.navController.navigate(R.id.action_libraryFragment_to_playlistCatalogueFragment, bundle);
+        });
 
         bind.albumCatalogueSampleTextViewRefreshable.setOnLongClickListener(view -> {
             libraryViewModel.refreshAlbumSample(requireActivity());
@@ -249,7 +254,7 @@ public class LibraryFragment extends Fragment {
     private void initPlaylistSlideView() {
         bind.playlistViewPager.setOrientation(ViewPager2.ORIENTATION_HORIZONTAL);
 
-        playlistAdapter = new PlaylistAdapter(activity, requireContext());
+        playlistAdapter = new PlaylistAdapter(activity, requireContext(), false);
         bind.playlistViewPager.setAdapter(playlistAdapter);
         bind.playlistViewPager.setOffscreenPageLimit(3);
         libraryViewModel.getPlaylistSample().observe(requireActivity(), playlists -> {

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

@@ -23,6 +23,8 @@ import androidx.recyclerview.widget.LinearLayoutManager;
 import com.cappielloantonio.play.R;
 import com.cappielloantonio.play.adapter.PlaylistCatalogueAdapter;
 import com.cappielloantonio.play.databinding.FragmentPlaylistCatalogueBinding;
+import com.cappielloantonio.play.model.Album;
+import com.cappielloantonio.play.model.Playlist;
 import com.cappielloantonio.play.ui.activity.MainActivity;
 import com.cappielloantonio.play.viewmodel.PlaylistCatalogueViewModel;
 
@@ -39,8 +41,6 @@ public class PlaylistCatalogueFragment extends Fragment {
     public void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setHasOptionsMenu(true);
-
-        initData();
     }
 
     @Override
@@ -49,7 +49,9 @@ public class PlaylistCatalogueFragment extends Fragment {
 
         bind = FragmentPlaylistCatalogueBinding.inflate(inflater, container, false);
         View view = bind.getRoot();
+        playlistCatalogueViewModel = new ViewModelProvider(requireActivity()).get(PlaylistCatalogueViewModel.class);
 
+        init();
         initAppBar();
         initPlaylistCatalogueView();
 
@@ -68,8 +70,12 @@ public class PlaylistCatalogueFragment extends Fragment {
         bind = null;
     }
 
-    private void initData() {
+    private void init() {
-        playlistCatalogueViewModel = new ViewModelProvider(requireActivity()).get(PlaylistCatalogueViewModel.class);
+        if (getArguments().getString(Playlist.ALL) != null) {
+            playlistCatalogueViewModel.setType(Playlist.ALL);
+        } else if (getArguments().getString(Playlist.DOWNLOADED) != null) {
+            playlistCatalogueViewModel.setType(Playlist.DOWNLOADED);
+        }
     }
 
     private void initAppBar() {
@@ -100,9 +106,9 @@ public class PlaylistCatalogueFragment extends Fragment {
         bind.playlistCatalogueRecyclerView.setLayoutManager(new LinearLayoutManager(requireContext()));
         bind.playlistCatalogueRecyclerView.setHasFixedSize(true);
 
-        playlistCatalogueAdapter = new PlaylistCatalogueAdapter(activity, requireContext());
+        playlistCatalogueAdapter = new PlaylistCatalogueAdapter(activity, requireContext(), playlistCatalogueViewModel.getType().equals(Playlist.DOWNLOADED));
         bind.playlistCatalogueRecyclerView.setAdapter(playlistCatalogueAdapter);
-        playlistCatalogueViewModel.getPlaylistList().observe(requireActivity(), playlist -> {
+        playlistCatalogueViewModel.getPlaylistList(requireActivity()).observe(requireActivity(), playlist -> {
             playlistCatalogueAdapter.setItems(playlist);
         });
 

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

@@ -1,5 +1,6 @@
 package com.cappielloantonio.play.ui.fragment;
 
+import android.content.Context;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.Menu;
@@ -81,12 +82,13 @@ public class PlaylistPageFragment extends Fragment {
 
     @Override
     public boolean onOptionsItemSelected(@NonNull MenuItem item) {
-        switch (item.getItemId()) {
+        if (item.getItemId() == R.id.action_download_playlist) {
-            case R.id.action_download_playlist:
+            playlistPageViewModel.getPlaylistSongLiveList(requireActivity()).observe(requireActivity(), songs -> {
-                DownloadUtil.getDownloadTracker(requireContext()).download(Objects.requireNonNull(playlistPageViewModel.getPlaylistSongLiveList().getValue()));
+                if (getContext() != null) {
-                return true;
+                    DownloadUtil.getDownloadTracker(requireContext()).download(songs, playlistPageViewModel.getPlaylist().getId(), playlistPageViewModel.getPlaylist().getName());
-            default:
+                }
-                break;
+            });
+            return true;
         }
 
         return false;
@@ -94,6 +96,7 @@ public class PlaylistPageFragment extends Fragment {
 
     private void init() {
         playlistPageViewModel.setPlaylist(getArguments().getParcelable("playlist_object"));
+        playlistPageViewModel.setOffline(getArguments().getBoolean("is_offline"));
     }
 
     private void initAppBar() {
@@ -110,13 +113,18 @@ public class PlaylistPageFragment extends Fragment {
         bind.playlistSongCountLabel.setText("Song count: " + playlistPageViewModel.getPlaylist().getSongCount());
         bind.playlistDurationLabel.setText("Playlist duration: " + MusicUtil.getReadableDurationString(playlistPageViewModel.getPlaylist().getDuration(), false));
 
+        if (playlistPageViewModel.isOffline()) {
+            bind.playlistSongCountLabel.setVisibility(View.GONE);
+            bind.playlistDurationLabel.setVisibility(View.GONE);
+        }
+
         bind.animToolbar.setNavigationOnClickListener(v -> activity.navController.navigateUp());
 
         Objects.requireNonNull(bind.animToolbar.getOverflowIcon()).setTint(requireContext().getResources().getColor(R.color.titleTextColor, null));
     }
 
     private void initMusicButton() {
-        playlistPageViewModel.getPlaylistSongLiveList().observe(requireActivity(), songs -> {
+        playlistPageViewModel.getPlaylistSongLiveList(requireActivity()).observe(requireActivity(), songs -> {
             if (bind != null) {
                 bind.playlistPagePlayButton.setOnClickListener(v -> {
                     QueueRepository queueRepository = new QueueRepository(App.getInstance());
@@ -158,6 +166,6 @@ public class PlaylistPageFragment extends Fragment {
         songHorizontalAdapter = new SongHorizontalAdapter(activity, requireContext(), true);
         bind.songRecyclerView.setAdapter(songHorizontalAdapter);
 
-        playlistPageViewModel.getPlaylistSongLiveList().observe(requireActivity(), songs -> songHorizontalAdapter.setItems(songs));
+        playlistPageViewModel.getPlaylistSongLiveList(requireActivity()).observe(requireActivity(), songs -> songHorizontalAdapter.setItems(songs));
     }
 }

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

@@ -140,9 +140,8 @@ public class AlbumBottomSheetDialog extends BottomSheetDialogFragment implements
         TextView removeAll = view.findViewById(R.id.remove_all_text_view);
 
         albumBottomSheetViewModel.getAlbumTracks().observe(requireActivity(), songs -> {
-
             downloadAll.setOnClickListener(v -> {
-                DownloadUtil.getDownloadTracker(requireContext()).download(songs);
+                DownloadUtil.getDownloadTracker(requireContext()).download(songs, null, null);
                 dismissBottomSheet();
             });
 

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

@@ -148,7 +148,7 @@ public class SongBottomSheetDialog extends BottomSheetDialogFragment implements
 
         TextView download = view.findViewById(R.id.download_text_view);
         download.setOnClickListener(v -> {
-            DownloadUtil.getDownloadTracker(requireContext()).download(Arrays.asList(song));
+            DownloadUtil.getDownloadTracker(requireContext()).download(Arrays.asList(song), null, null);
             dismissBottomSheet();
         });
 

app/src/main/java/com/cappielloantonio/play/util/MappingUtil.java

@@ -19,6 +19,7 @@ import com.cappielloantonio.play.subsonic.models.SimilarArtistID3;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
+import java.util.stream.Collectors;
 
 public class MappingUtil {
     public static ArrayList<Song> mapSong(List<Child> children) {
@@ -144,18 +145,28 @@ public class MappingUtil {
         return artists;
     }
 
+    public static ArrayList<Playlist> mapDownloadToPlaylist(List<Download> downloads) {
+        ArrayList<Playlist> playlists = new ArrayList();
+
+        for (Download download : downloads) {
+            playlists.add(new Playlist(download.getPlaylistId(), download.getPlaylistName()));
+        }
+
+        return playlists;
+    }
+
     public static ArrayList<Download> mapToDownload(List<Song> songs) {
         ArrayList<Download> downloads = new ArrayList();
 
         for (Song song : songs) {
-            downloads.add(new Download(song));
+            downloads.add(new Download(song, null, null));
         }
 
         return downloads;
     }
 
-    public static Download mapToDownload(Song song) {
+    public static Download mapToDownload(Song song, String playlistId, String playlistName) {
-        return new Download(song);
+        return new Download(song, playlistId, playlistName);
     }
 
     public static ArrayList<com.cappielloantonio.play.model.Genre> mapGenre(List<Genre> genreList) {

app/src/main/java/com/cappielloantonio/play/viewmodel/DownloadViewModel.java

@@ -10,6 +10,7 @@ import androidx.lifecycle.MutableLiveData;
 
 import com.cappielloantonio.play.model.Album;
 import com.cappielloantonio.play.model.Artist;
+import com.cappielloantonio.play.model.Playlist;
 import com.cappielloantonio.play.model.Song;
 import com.cappielloantonio.play.repository.DownloadRepository;
 import com.cappielloantonio.play.util.MappingUtil;
@@ -24,6 +25,7 @@ public class DownloadViewModel extends AndroidViewModel {
     private final MutableLiveData<List<Artist>> downloadedArtistSample = new MutableLiveData<>(null);
     private final MutableLiveData<List<Album>> downloadedAlbumSample = new MutableLiveData<>(null);
     private final MutableLiveData<List<Song>> downloadedTrackSample = new MutableLiveData<>(null);
+    private final MutableLiveData<List<Playlist>> downloadedPlaylistSample = new MutableLiveData<>(null);
 
     public DownloadViewModel(@NonNull Application application) {
         super(application);
@@ -32,17 +34,22 @@ public class DownloadViewModel extends AndroidViewModel {
     }
 
     public LiveData<List<Artist>> getDownloadedArtists(LifecycleOwner owner, int size) {
-        downloadRepository.getLiveDownloadSample(size, true, false, false).observe(owner, downloads -> downloadedArtistSample.postValue(MappingUtil.mapDownloadToArtist(downloads)));
+        downloadRepository.getLiveDownloadSample(size, true, false, false, false).observe(owner, downloads -> downloadedArtistSample.postValue(MappingUtil.mapDownloadToArtist(downloads)));
         return downloadedArtistSample;
     }
 
     public LiveData<List<Album>> getDownloadedAlbums(LifecycleOwner owner, int size) {
-        downloadRepository.getLiveDownloadSample(size, false, true, false).observe(owner, downloads -> downloadedAlbumSample.postValue(MappingUtil.mapDownloadToAlbum(downloads)));
+        downloadRepository.getLiveDownloadSample(size, false, true, false, false).observe(owner, downloads -> downloadedAlbumSample.postValue(MappingUtil.mapDownloadToAlbum(downloads)));
         return downloadedAlbumSample;
     }
 
     public LiveData<List<Song>> getDownloadedTracks(LifecycleOwner owner, int size) {
-        downloadRepository.getLiveDownloadSample(size, false, false, true).observe(owner, downloads -> downloadedTrackSample.postValue(MappingUtil.mapDownloadToSong(downloads)));
+        downloadRepository.getLiveDownloadSample(size, false, false, true, false).observe(owner, downloads -> downloadedTrackSample.postValue(MappingUtil.mapDownloadToSong(downloads)));
         return downloadedTrackSample;
     }
+
+    public LiveData<List<Playlist>> getDownloadedPlaylists(LifecycleOwner owner, int size) {
+        downloadRepository.getLiveDownloadSample(size, false, false, false, true).observe(owner, downloads -> downloadedPlaylistSample.postValue(MappingUtil.mapDownloadToPlaylist(downloads)));
+        return downloadedPlaylistSample;
+    }
 }

app/src/main/java/com/cappielloantonio/play/viewmodel/PlaylistCatalogueViewModel.java

@@ -3,24 +3,57 @@ package com.cappielloantonio.play.viewmodel;
 import android.app.Application;
 
 import androidx.annotation.NonNull;
+import androidx.fragment.app.FragmentActivity;
 import androidx.lifecycle.AndroidViewModel;
 import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
 
+import com.cappielloantonio.play.model.Album;
 import com.cappielloantonio.play.model.Playlist;
+import com.cappielloantonio.play.repository.DownloadRepository;
 import com.cappielloantonio.play.repository.PlaylistRepository;
+import com.cappielloantonio.play.util.MappingUtil;
 
+import java.util.ArrayList;
 import java.util.List;
 
 public class PlaylistCatalogueViewModel extends AndroidViewModel {
     private final PlaylistRepository playlistRepository;
+    private final DownloadRepository downloadRepository;
+
+    private String type;
+
+    private MutableLiveData<List<Playlist>> playlistList;
 
     public PlaylistCatalogueViewModel(@NonNull Application application) {
         super(application);
 
         playlistRepository = new PlaylistRepository(application);
+        downloadRepository = new DownloadRepository(application);
     }
 
-    public LiveData<List<Playlist>> getPlaylistList() {
+    public LiveData<List<Playlist>> getPlaylistList(FragmentActivity activity) {
-        return playlistRepository.getPlaylists(false, -1);
+        playlistList = new MutableLiveData<>(new ArrayList<>());
+
+        switch (type) {
+            case Playlist.ALL:
+                playlistRepository.getPlaylists(false, -1).observe(activity, playlists -> playlistList.postValue(playlists));
+                break;
+            case Playlist.DOWNLOADED:
+                downloadRepository.getLivePlaylist().observe(activity, downloads -> playlistList.setValue(MappingUtil.mapDownloadToPlaylist(downloads)));
+                break;
+        }
+
+        playlistRepository.getPlaylists(false, -1);
+
+        return playlistList;
+    }
+
+    public void setType(String type) {
+        this.type = type;
+    }
+
+    public String getType() {
+        return type;
     }
 }

app/src/main/java/com/cappielloantonio/play/viewmodel/PlaylistPageViewModel.java

@@ -3,28 +3,45 @@ package com.cappielloantonio.play.viewmodel;
 import android.app.Application;
 
 import androidx.annotation.NonNull;
+import androidx.fragment.app.FragmentActivity;
 import androidx.lifecycle.AndroidViewModel;
+import androidx.lifecycle.LiveData;
 import androidx.lifecycle.MutableLiveData;
 
+import com.cappielloantonio.play.model.Album;
 import com.cappielloantonio.play.model.Playlist;
 import com.cappielloantonio.play.model.Song;
+import com.cappielloantonio.play.repository.DownloadRepository;
 import com.cappielloantonio.play.repository.PlaylistRepository;
+import com.cappielloantonio.play.util.MappingUtil;
 
 import java.util.List;
 
 public class PlaylistPageViewModel extends AndroidViewModel {
     private final PlaylistRepository playlistRepository;
+    private final DownloadRepository downloadRepository;
+
+    private MutableLiveData<List<Song>> playlistSongLiveList = new MutableLiveData<>();
 
     private Playlist playlist;
+    private boolean isOffline;
 
     public PlaylistPageViewModel(@NonNull Application application) {
         super(application);
 
         playlistRepository = new PlaylistRepository(application);
+        downloadRepository = new DownloadRepository(application);
     }
 
-    public MutableLiveData<List<Song>> getPlaylistSongLiveList() {
+    public LiveData<List<Song>> getPlaylistSongLiveList(FragmentActivity activity) {
-        return playlistRepository.getPlaylistSongs(playlist.getId());
+        if (isOffline) {
+            downloadRepository.getLiveDownloadFromPlaylist(playlist.getId()).observe(activity, downloads -> playlistSongLiveList.postValue(MappingUtil.mapDownloadToSong(downloads)));
+        }
+        else {
+            playlistSongLiveList = playlistRepository.getPlaylistSongs(playlist.getId());
+        }
+
+        return playlistSongLiveList;
     }
 
     public Playlist getPlaylist() {
@@ -34,4 +51,12 @@ public class PlaylistPageViewModel extends AndroidViewModel {
     public void setPlaylist(Playlist playlist) {
         this.playlist = playlist;
     }
+
+    public void setOffline(boolean offline) {
+        isOffline = offline;
+    }
+
+    public boolean isOffline() {
+        return isOffline;
+    }
 }

app/src/main/res/layout/fragment_download.xml

@@ -256,6 +256,61 @@
                 android:id="@+id/download_downloaded_tracks_placeholder"
                 layout="@layout/item_placeholder_horizontal"
                 android:visibility="gone" />
+
+            <LinearLayout
+                android:id="@+id/download_downloaded_playlist_sector"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:paddingBottom="8dp">
+
+                <!--  Label and button  -->
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal"
+                    android:paddingStart="8dp"
+                    android:paddingTop="8dp"
+                    android:paddingEnd="8dp">
+
+                    <TextView
+                        android:id="@+id/downloaded_playlist_text_view_refreshable"
+                        style="@style/HeadlineTextView"
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="1"
+                        android:paddingStart="8dp"
+                        android:paddingTop="12dp"
+                        android:paddingEnd="8dp"
+                        android:text="Playlists" />
+
+
+                    <TextView
+                        android:id="@+id/downloaded_playlist_text_view_clickable"
+                        style="@style/SubheadTextView"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:paddingStart="8dp"
+                        android:paddingTop="12dp"
+                        android:paddingEnd="8dp"
+                        android:text="See all" />
+
+                </LinearLayout>
+
+                <!--  slideview  -->
+                <androidx.viewpager2.widget.ViewPager2
+                    android:id="@+id/downloaded_playlist_view_pager"
+                    android:layout_width="match_parent"
+                    android:layout_height="212dp"
+                    android:clipToPadding="false"
+                    android:paddingTop="8dp"
+                    android:paddingBottom="8dp" />
+            </LinearLayout>
+
+            <include
+                android:id="@+id/download_downloaded_playlist_placeholder"
+                layout="@layout/item_placeholder_album"
+                android:visibility="gone" />
         </LinearLayout>
     </androidx.core.widget.NestedScrollView>
 </androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/navigation/nav_graph.xml

@@ -119,6 +119,12 @@
         <action
             android:id="@+id/action_downloadFragment_to_searchFragment"
             app:destination="@id/searchFragment" />
+        <action
+            android:id="@+id/action_downloadFragment_to_playlistPageFragment"
+            app:destination="@id/playlistPageFragment" />
+        <action
+            android:id="@+id/action_downloadFragment_to_playlistCatalogueFragment"
+            app:destination="@id/playlistCatalogueFragment" />
     </fragment>
     <fragment
         android:id="@+id/settingsFragment"

build.gradle

@@ -6,7 +6,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.0.1'
+        classpath 'com.android.tools.build:gradle:7.0.2'
         classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.5.30'
 
         // NOTE: Do not place your application dependencies here; they belong