Go back to first page on bottomSheet collapse

app/src/main/java/com/cappielloantonio/play/ui/activity/MainActivity.java

@@ -15,13 +15,10 @@ import androidx.navigation.NavController;
 import androidx.navigation.fragment.NavHostFragment;
 import androidx.navigation.ui.NavigationUI;
 
-import com.cappielloantonio.play.App;
 import com.cappielloantonio.play.R;
 import com.cappielloantonio.play.broadcast.receiver.ConnectivityStatusBroadcastReceiver;
 import com.cappielloantonio.play.databinding.ActivityMainBinding;
-import com.cappielloantonio.play.repository.QueueRepository;
 import com.cappielloantonio.play.service.MediaManager;
-import com.cappielloantonio.play.service.MediaService;
 import com.cappielloantonio.play.ui.activity.base.BaseActivity;
 import com.cappielloantonio.play.ui.dialog.ConnectionAlertDialog;
 import com.cappielloantonio.play.ui.dialog.ServerUnreachableDialog;
@@ -152,19 +149,10 @@ public class MainActivity extends BaseActivity {
                             break;
                         case BottomSheetBehavior.STATE_COLLAPSED:
                             if (playerBottomSheetFragment != null) {
-                                // playerBottomSheetFragment.goBackToFirstPage();
+                                playerBottomSheetFragment.goBackToFirstPage();
-                                // playerBottomSheetFragment.scrollOnTop();
                             }
                         case BottomSheetBehavior.STATE_SETTLING:
-                            if (playerBottomSheetFragment != null) {
-                                // playerBottomSheetFragment.scrollOnTop();
-                            }
-                            break;
                         case BottomSheetBehavior.STATE_EXPANDED:
-                            if (playerBottomSheetFragment != null) {
-                                // playerBottomSheetFragment.scrollOnTop();
-                                // setBottomSheetDraggableState(playerBottomSheetFragment.isViewPagerInFirstPage());
-                            }
                         case BottomSheetBehavior.STATE_DRAGGING:
                         case BottomSheetBehavior.STATE_HALF_EXPANDED:
                             break;

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

@@ -177,4 +177,12 @@ public class PlayerBottomSheetFragment extends Fragment {
     public View getPlayerHeader() {
         return requireView().findViewById(R.id.player_header_layout);
     }
+
+    public void goBackToFirstPage() {
+        bind.playerBodyLayout.playerBodyBottomSheetViewPager.setCurrentItem(0, false);
+
+        PlayerControllerVerticalPager playerControllerVerticalPager = (PlayerControllerVerticalPager) bind.playerBodyLayout.playerBodyBottomSheetViewPager.getAdapter();
+        PlayerControllerFragment playerControllerFragment = (PlayerControllerFragment) playerControllerVerticalPager.getRegisteredFragment(0);
+        playerControllerFragment.goBackToFirstPage();
+    }
 }

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

@@ -24,11 +24,11 @@ import androidx.navigation.fragment.NavHostFragment;
 import androidx.viewpager2.widget.ViewPager2;
 
 import com.cappielloantonio.play.R;
-import com.cappielloantonio.play.ui.fragment.pager.PlayerControllerHorizontalPager;
 import com.cappielloantonio.play.databinding.InnerFragmentPlayerControllerBinding;
 import com.cappielloantonio.play.service.MediaService;
 import com.cappielloantonio.play.ui.activity.MainActivity;
 import com.cappielloantonio.play.ui.dialog.RatingDialog;
+import com.cappielloantonio.play.ui.fragment.pager.PlayerControllerHorizontalPager;
 import com.cappielloantonio.play.util.MusicUtil;
 import com.cappielloantonio.play.viewmodel.PlayerBottomSheetViewModel;
 import com.google.common.util.concurrent.ListenableFuture;
@@ -87,6 +87,7 @@ public class PlayerControllerFragment extends Fragment {
         bind = null;
     }
 
+
     @SuppressLint("UnsafeOptInUsageError")
     private void init() {
         playerMoveDownBottomSheet = bind.getRoot().findViewById(R.id.player_move_down_bottom_sheet);
@@ -115,7 +116,7 @@ public class PlayerControllerFragment extends Fragment {
             try {
                 MediaBrowser mediaBrowser = mediaBrowserListenableFuture.get();
 
-                bind.playerControlBodyLayout.setPlayer(mediaBrowser);
+                bind.nowPlayingSongControllerView.setPlayer(mediaBrowser);
 
                 setMediaControllerListener(mediaBrowser);
             } catch (Exception e) {
@@ -200,4 +201,8 @@ public class PlayerControllerFragment extends Fragment {
             activity.collapseBottomSheet();
         }));
     }
+
+    public void goBackToFirstPage() {
+        playerSongCoverViewPager.setCurrentItem(0, false);
+    }
 }

app/src/main/java/com/cappielloantonio/play/ui/fragment/pager/PlayerControllerVerticalPager.java

@@ -7,11 +7,17 @@ import androidx.viewpager2.adapter.FragmentStateAdapter;
 import com.cappielloantonio.play.ui.fragment.PlayerControllerFragment;
 import com.cappielloantonio.play.ui.fragment.PlayerQueueFragment;
 
+import java.util.HashMap;
+
 public class PlayerControllerVerticalPager extends FragmentStateAdapter {
     private static final String TAG = "PlayerControllerVerticalPager";
 
+    private final HashMap<Integer, Fragment> maps;
+
     public PlayerControllerVerticalPager(@NonNull Fragment fragment) {
         super(fragment);
+
+        this.maps = new HashMap<>();
     }
 
     @NonNull
@@ -19,16 +25,26 @@ public class PlayerControllerVerticalPager extends FragmentStateAdapter {
     public Fragment createFragment(int position) {
         switch (position) {
             case 0:
-                return new PlayerControllerFragment();
+                Fragment playerControllerFragment = new PlayerControllerFragment();
+                maps.put(position, playerControllerFragment);
+                return playerControllerFragment;
             case 1:
-                return new PlayerQueueFragment();
+                Fragment playerQueueFragment = new PlayerQueueFragment();
+                maps.put(position, playerQueueFragment);
+                return playerQueueFragment;
         }
 
-        return new PlayerControllerFragment();
+        Fragment playerControllerFragment = new PlayerControllerFragment();
+        maps.put(position, playerControllerFragment);
+        return playerControllerFragment;
     }
 
     @Override
     public int getItemCount() {
         return 2;
     }
+
+    public Fragment getRegisteredFragment(int position) {
+        return maps.get(position);
+    }
 }