Fix a bunch of potential memory leaks

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

@@ -65,6 +65,7 @@ public class MainActivity extends BaseActivity {
     protected void onDestroy() {
         super.onDestroy();
         connectivityStatusReceiverManager(false);
+        bind = null;
     }
 
     public void init() {
@@ -186,7 +187,7 @@ public class MainActivity extends BaseActivity {
 
         if (Objects.requireNonNull(navController.getCurrentDestination()).getId() == R.id.landingFragment) {
             navController.navigate(R.id.action_landingFragment_to_loginFragment);
-        } else if(Objects.requireNonNull(navController.getCurrentDestination()).getId() == R.id.settingsFragment) {
+        } else if (Objects.requireNonNull(navController.getCurrentDestination()).getId() == R.id.settingsFragment) {
             navController.navigate(R.id.action_settingsFragment_to_loginFragment);
         }
     }

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

@@ -102,6 +102,12 @@ public class PlayerBottomSheetFragment extends Fragment implements MusicServiceE
         activity.removeMusicServiceEventListener(this);
     }
 
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        bind = null;
+    }
+
     private void initQueueSlideView() {
         bind.playerBodyLayout.playerSongCoverViewPager.setOrientation(ViewPager2.ORIENTATION_HORIZONTAL);
 

app/src/main/java/com/cappielloantonio/play/ui/fragment/dialog/PlaylistChooserDialog.java

@@ -2,7 +2,6 @@ package com.cappielloantonio.play.ui.fragment.dialog;
 
 import android.app.AlertDialog;
 import android.app.Dialog;
-import android.content.Context;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -14,7 +13,6 @@ import androidx.recyclerview.widget.LinearLayoutManager;
 import com.cappielloantonio.play.R;
 import com.cappielloantonio.play.adapter.PlaylistHorizontalAdapter;
 import com.cappielloantonio.play.databinding.DialogPlaylistChooserBinding;
-import com.cappielloantonio.play.ui.activity.MainActivity;
 import com.cappielloantonio.play.viewmodel.PlaylistChooserViewModel;
 
 import java.util.Objects;
@@ -23,17 +21,12 @@ public class PlaylistChooserDialog extends DialogFragment {
     private static final String TAG = "ServerSignupDialog";
 
     private DialogPlaylistChooserBinding bind;
-    private MainActivity activity;
-    private Context context;
     private PlaylistChooserViewModel playlistChooserViewModel;
 
     private PlaylistHorizontalAdapter playlistHorizontalAdapter;
 
     @Override
     public Dialog onCreateDialog(Bundle savedInstanceState) {
-        activity = (MainActivity) getActivity();
-        context = requireContext();
-
         bind = DialogPlaylistChooserBinding.inflate(LayoutInflater.from(requireContext()));
         playlistChooserViewModel = new ViewModelProvider(requireActivity()).get(PlaylistChooserViewModel.class);
 
@@ -48,6 +41,12 @@ public class PlaylistChooserDialog extends DialogFragment {
         return builder.create();
     }
 
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        bind = null;
+    }
+
     @Override
     public void onStart() {
         super.onStart();
@@ -89,12 +88,11 @@ public class PlaylistChooserDialog extends DialogFragment {
         bind.playlistDialogRecyclerView.setAdapter(playlistHorizontalAdapter);
 
         playlistChooserViewModel.getPlaylistList().observe(requireActivity(), playlists -> {
-            if(playlists.size() > 0) {
+            if (playlists.size() > 0) {
                 if (bind != null) bind.noPlaylistsCreatedTextView.setVisibility(View.GONE);
                 if (bind != null) bind.playlistDialogRecyclerView.setVisibility(View.VISIBLE);
                 playlistHorizontalAdapter.setItems(playlists);
-            }
+            } else {
-            else {
                 if (bind != null) bind.noPlaylistsCreatedTextView.setVisibility(View.VISIBLE);
                 if (bind != null) bind.playlistDialogRecyclerView.setVisibility(View.GONE);
             }

app/src/main/java/com/cappielloantonio/play/ui/fragment/dialog/PlaylistEditorDialog.java

@@ -29,7 +29,6 @@ public class PlaylistEditorDialog extends DialogFragment {
 
     private DialogPlaylistEditorBinding bind;
     private MainActivity activity;
-    private Context context;
     private PlaylistEditorViewModel playlistEditorViewModel;
 
     private String playlistName;
@@ -38,7 +37,6 @@ public class PlaylistEditorDialog extends DialogFragment {
     @Override
     public Dialog onCreateDialog(Bundle savedInstanceState) {
         activity = (MainActivity) getActivity();
-        context = requireContext();
 
         bind = DialogPlaylistEditorBinding.inflate(LayoutInflater.from(requireContext()));
         playlistEditorViewModel = new ViewModelProvider(requireActivity()).get(PlaylistEditorViewModel.class);
@@ -64,6 +62,12 @@ public class PlaylistEditorDialog extends DialogFragment {
         initSongsView();
     }
 
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        bind = null;
+    }
+
     private void setParameterInfo() {
         if (getArguments() != null) {
             if (getArguments().getParcelable("song_object") != null) {

app/src/main/java/com/cappielloantonio/play/ui/fragment/dialog/RatingDialog.java

@@ -20,15 +20,10 @@ public class RatingDialog extends DialogFragment {
     private static final String TAG = "ServerSignupDialog";
 
     private DialogRatingBinding bind;
-    private MainActivity activity;
-    private Context context;
     private RatingViewModel ratingViewModel;
 
     @Override
     public Dialog onCreateDialog(Bundle savedInstanceState) {
-        activity = (MainActivity) getActivity();
-        context = requireContext();
-
         bind = DialogRatingBinding.inflate(LayoutInflater.from(requireContext()));
         ratingViewModel = new ViewModelProvider(requireActivity()).get(RatingViewModel.class);
 
@@ -53,6 +48,12 @@ public class RatingDialog extends DialogFragment {
         setRating();
     }
 
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        bind = null;
+    }
+
     private void setElementInfo() {
         if (getArguments() != null) {
             if (getArguments().getParcelable("song_object") != null) {

app/src/main/java/com/cappielloantonio/play/ui/fragment/dialog/ServerSignupDialog.java

@@ -72,6 +72,12 @@ public class ServerSignupDialog extends DialogFragment {
         setButtonAction();
     }
 
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        bind = null;
+    }
+
     private void setServerInfo() {
         if (getArguments() != null) {
             loginViewModel.setServerToEdit(getArguments().getParcelable("server_object"));