Added suggestions & Updated libs.

app/src/main/java/code/name/monkey/retromusic/model/Home.kt

@@ -15,13 +15,10 @@
 package code.name.monkey.retromusic.model
 
 import androidx.annotation.DrawableRes
-import androidx.annotation.StringRes
 import code.name.monkey.retromusic.adapter.HomeAdapter.Companion.HomeSection
 
 class Home(
-    val priority: Int,
-    @StringRes val title: Int,
-    val arrayList: ArrayList<*>,
+    val arrayList: List<*>,
     @HomeSection
     val homeSection: Int,
     @DrawableRes

app/src/main/java/code/name/monkey/retromusic/model/Playlist.java

@@ -23,6 +23,7 @@ import androidx.annotation.NonNull;
 import java.util.ArrayList;
 
 import code.name.monkey.retromusic.loaders.PlaylistSongsLoader;
+import code.name.monkey.retromusic.util.MusicUtil;
 
 
 public class Playlist implements Parcelable {
@@ -106,5 +107,14 @@ public class Playlist implements Parcelable {
         dest.writeString(this.name);
     }
 
+    @NonNull
+    public String getInfoString(@NonNull Context context) {
+        int songCount = getSongs(context).size();
+        String songCountString = MusicUtil.getSongCountString(context, songCount);
 
+        return MusicUtil.buildInfoString(
+                songCountString,
+                ""
+        );
+    }
 }

app/src/main/java/code/name/monkey/retromusic/model/smartplaylist/NotRecentlyPlayedPlaylist.java

@@ -0,0 +1,69 @@
+package code.name.monkey.retromusic.model.smartplaylist;
+
+import android.content.Context;
+import android.os.Parcel;
+
+import androidx.annotation.NonNull;
+
+import java.util.ArrayList;
+
+import code.name.monkey.retromusic.R;
+import code.name.monkey.retromusic.loaders.TopAndRecentlyPlayedTracksLoader;
+import code.name.monkey.retromusic.model.Song;
+import code.name.monkey.retromusic.util.MusicUtil;
+import code.name.monkey.retromusic.util.PreferenceUtil;
+
+/**
+ * @author SC (soncaokim)
+ */
+public class NotRecentlyPlayedPlaylist extends AbsSmartPlaylist {
+
+    public static final Creator<NotRecentlyPlayedPlaylist> CREATOR = new Creator<NotRecentlyPlayedPlaylist>() {
+        public NotRecentlyPlayedPlaylist createFromParcel(Parcel source) {
+            return new NotRecentlyPlayedPlaylist(source);
+        }
+
+        public NotRecentlyPlayedPlaylist[] newArray(int size) {
+            return new NotRecentlyPlayedPlaylist[size];
+        }
+    };
+
+    public NotRecentlyPlayedPlaylist(@NonNull Context context) {
+        super(context.getString(R.string.not_recently_played), R.drawable.ic_watch_later_white_24dp);
+    }
+
+    protected NotRecentlyPlayedPlaylist(Parcel in) {
+        super(in);
+    }
+
+    @NonNull
+    @Override
+    public String getInfoString(@NonNull Context context) {
+        String cutoff = PreferenceUtil.INSTANCE.getRecentlyPlayedCutoffText(context);
+
+        return MusicUtil.buildInfoString(
+                cutoff,
+                super.getInfoString(context)
+        );
+    }
+
+    @NonNull
+    @Override
+    public ArrayList<Song> getSongs(@NonNull Context context) {
+        return TopAndRecentlyPlayedTracksLoader.INSTANCE.getNotRecentlyPlayedTracks(context);
+    }
+
+    @Override
+    public void clear(@NonNull Context context) {
+    }
+
+    @Override
+    public boolean isClearable() {
+        return false;
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+}