Update Concerts

app/src/main/java/core/notevault/MainActivity.java

@@ -6,6 +6,9 @@ import android.os.Bundle;
 import android.util.Log;
 import android.view.View;
 import android.view.Menu;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentManager;
+import androidx.navigation.fragment.NavHostFragment;
 import com.google.android.material.snackbar.Snackbar;
 import com.google.android.material.navigation.NavigationView;
 import androidx.navigation.NavController;
@@ -19,6 +22,7 @@ import core.notevault.data.MusicDatabase;
 import core.notevault.data.MusicNote;
 import core.notevault.data.NoteSheet;
 import core.notevault.databinding.ActivityMainBinding;
+import core.notevault.ui.gallery.GalleryFragment;
 import core.notevault.ui.gallery.editor.ConcertEditorDialog;
 import core.notevault.ui.metadatadialog.MetaDataDialog;
 import core.notevault.util.NoteSheetsUtil;
@@ -110,6 +114,20 @@ public class MainActivity extends AppCompatActivity implements MetaDataDialog.On
             Log.d("ConcertEditor", "Saved Concert: " + concertTitle + " on " + concertDate);
             musicDB.musicNoteDao().insertConcert(concert);
 
+            runOnUiThread(() -> {
+                NavHostFragment navHostFragment = (NavHostFragment) getSupportFragmentManager().findFragmentById(R.id.nav_host_fragment_content_main);
+                Fragment currentFragment = navHostFragment != null ? navHostFragment.getChildFragmentManager().getFragments().get(0) : null;
+
+                Log.d("MainActivity", "Test for GalleryFragment");
+                Log.d("MainActivity", "Current Fragment: " + currentFragment.getClass().getSimpleName());
+                if(currentFragment instanceof GalleryFragment) {
+                    Log.d("MainActivity", "GalleryFragment Found");
+                    GalleryFragment galleryFragment = (GalleryFragment) currentFragment;
+                    galleryFragment.addConcert(concert);
+                } else {
+                    Log.d("MainActivity", "GalleryFragment Not Found");
+                }
+            });
         }).start();
     }
 }

app/src/main/java/core/notevault/ui/gallery/ConcertAdapter.java

@@ -1,5 +1,6 @@
 package core.notevault.ui.gallery;
 
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -45,6 +46,7 @@ public class ConcertAdapter extends RecyclerView.Adapter<ConcertAdapter.ConcertV
     }
 
     public void updateConcerts(List<Concert> concerts) {
+        Log.d("ConcertAdapter", "Update Concerts: " + this.concertList.size() + "vs new: " + concerts.size());
         this.concertList.clear();
         this.concertList.addAll(concerts);
         notifyDataSetChanged();

app/src/main/java/core/notevault/ui/gallery/GalleryFragment.java

@@ -2,6 +2,7 @@ package core.notevault.ui.gallery;
 
 import android.os.AsyncTask;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -26,10 +27,11 @@ public class GalleryFragment extends Fragment {
 
     private FragmentGalleryBinding binding;
     private ConcertAdapter concertAdapter;
+    private GalleryViewModel galleryViewModel;
 
     public View onCreateView(@NonNull LayoutInflater inflater,
                              ViewGroup container, Bundle savedInstanceState) {
-        GalleryViewModel galleryViewModel =
+        galleryViewModel =
                 new ViewModelProvider(this).get(GalleryViewModel.class);
 
         binding = FragmentGalleryBinding.inflate(inflater, container, false);
@@ -40,24 +42,39 @@ public class GalleryFragment extends Fragment {
         recyclerView.setAdapter(concertAdapter);
         recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
 
-        new LoadConcerts().execute();
+
         FloatingActionButton addConcertBtn = root.findViewById(R.id.add_concert_btn);
         addConcertBtn.setOnClickListener(v -> onCreateNewConcert());
+
+        galleryViewModel.getConcerts().observe(getViewLifecycleOwner(), newConcerts -> {
+            concertAdapter.updateConcerts(newConcerts);
+        });
+
+        new LoadConcerts().execute();
         return root;
     }
 
+    public void updateConcerts() {
+
+    }
+
     private class LoadConcerts extends AsyncTask<Void, Void, List<Concert>> {
 
         @Override
         protected List<Concert> doInBackground(Void... voids) {
             MusicDatabase db = MusicDatabase.getDatabase(getContext());
             MusicNoteDAO musicNoteDAO = db.musicNoteDao();
-            return musicNoteDAO.getAllConcerts();
+            List<Concert> concerts =  musicNoteDAO.getAllConcerts();
+            Log.d("GalleryFragment", "Fetching concerts: " + concerts.size());
+            return concerts;
+
         }
 
         @Override
         protected void onPostExecute(List<Concert> concerts) {
-            concertAdapter.updateConcerts(concerts); // Aktualisiere den Adapter mit den Titeln
+            Log.d("GalleryFragment", "Concerts size in onPostExecute: " + concerts.size());
+            // concertAdapter.updateConcerts(concerts); // Aktualisiere den Adapter mit den Titeln
+            galleryViewModel.setConcerts(concerts);
         }
     }
 
@@ -66,6 +83,10 @@ public class GalleryFragment extends Fragment {
         concertEditorDialog.show(getParentFragmentManager(), ConcertEditorDialog.TAG);
     }
 
+    public void addConcert(Concert concert) {
+        this.galleryViewModel.addConcert(concert);
+    }
+
     @Override
     public void onDestroyView() {
         super.onDestroyView();

app/src/main/java/core/notevault/ui/gallery/GalleryViewModel.java

@@ -1,19 +1,37 @@
 package core.notevault.ui.gallery;
 
+import android.util.Log;
 import androidx.lifecycle.LiveData;
 import androidx.lifecycle.MutableLiveData;
 import androidx.lifecycle.ViewModel;
+import core.notevault.data.Concert;
+
+import java.util.List;
 
 public class GalleryViewModel extends ViewModel {
 
-    private final MutableLiveData<String> mText;
+    private final MutableLiveData<List<Concert>> concerts;
 
     public GalleryViewModel() {
-        mText = new MutableLiveData<>();
+       this.concerts = new MutableLiveData<>();
-        mText.setValue("This is gallery fragment");
     }
 
-    public LiveData<String> getText() {
+
-        return mText;
+    public LiveData<List<Concert>> getConcerts() {
+        return concerts;
+    }
+
+    public void setConcerts(List<Concert> concerts) {
+        this.concerts.setValue(concerts);
+    }
+
+    public void addConcert(Concert concert) {
+        List<Concert> currentConcerts = this.concerts.getValue();
+        Log.d("GalleryViewModel", "Add Concert");
+        if(currentConcerts != null) {
+            currentConcerts.add(concert);
+            concerts.setValue(currentConcerts);
+        }
+
     }
 }