Minor improvements

app/build.gradle

@@ -1,4 +1,5 @@
 apply plugin: 'com.android.application'
+apply plugin: "androidx.navigation.safeargs"
 
 android {
     compileSdkVersion 30

app/src/main/AndroidManifest.xml

@@ -42,17 +42,10 @@
             android:name=".view.activity.MainActivity"
             android:windowSoftInputMode="adjustPan" />
 
-        <activity
-            android:name=".view.activity.RestaurantDetails"
-            android:theme="@style/AppTheme" />
-
         <activity
             android:name=".view.activity.MenuActivity"
             android:theme="@style/AppTheme" />
 
-        <activity
-            android:name=".view.activity.CollectionDetails" />
-
     </application>
 
 </manifest>

app/src/main/java/com/tip/lunchbox/view/activity/MainActivity.java

@@ -1,9 +1,13 @@
 package com.tip.lunchbox.view.activity;
 
 import android.os.Bundle;
+import android.view.View;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.navigation.NavController;
+import androidx.navigation.NavDestination;
 import androidx.navigation.Navigation;
 import androidx.navigation.ui.NavigationUI;
 
@@ -24,6 +28,14 @@ protected void onCreate(Bundle savedInstanceState) {
         //Setting navController
         NavController navController = Navigation.findNavController(this,
                 R.id.navigation_host_fragment);
+        navController.addOnDestinationChangedListener((controller, destination, arguments) -> {
+            if (destination.getId() == R.id.restaurantDetails
+                    || destination.getId() == R.id.collectionDetails) {
+                mainBinding.mainActivityBn.setVisibility(View.GONE);
+            } else {
+                mainBinding.mainActivityBn.setVisibility(View.VISIBLE);
+            }
+        });
         NavigationUI.setupWithNavController(mainBinding.mainActivityBn, navController);
     }
 

app/src/main/java/com/tip/lunchbox/view/adapter/RestaurantAdapter.java

@@ -75,6 +75,7 @@ public void addData(RestaurantContainer restaurantContainer) {
             restaurantItemBinding.itemTvRestaurantName.setText(restaurant.getName());
             Glide.with(restaurantItemBinding.getRoot())
                     .load(restaurant.getThumb())
+                    .error(R.drawable.ic_image_not_found)
                     .centerCrop()
                     .into(restaurantItemBinding.itemIvRestaurant);
             restaurantItemBinding.itemTvRating.setText(

app/src/main/java/com/tip/lunchbox/view/fragment/CollectionDetails.java

@@ -0,0 +1,60 @@
+package com.tip.lunchbox.view.fragment;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.ViewModelProvider;
+import androidx.navigation.fragment.NavHostFragment;
+import androidx.recyclerview.widget.LinearLayoutManager;
+
+import com.tip.lunchbox.databinding.FragmentCollectionDetailsBinding;
+import com.tip.lunchbox.view.adapter.RestaurantAdapter;
+import com.tip.lunchbox.view.listeners.RecyclerTouchListener;
+import com.tip.lunchbox.viewmodel.CollectionDetailsViewModel;
+
+import org.jetbrains.annotations.NotNull;
+
+public class CollectionDetails extends Fragment {
+    private FragmentCollectionDetailsBinding binding;
+    private CollectionDetailsViewModel viewModel;
+    private RestaurantAdapter adapter;
+
+    @Override
+    public View onCreateView(@NotNull LayoutInflater inflater,
+                             ViewGroup container,
+                             Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        binding = FragmentCollectionDetailsBinding.inflate(inflater, container, false);
+        setupRecyclerView();
+
+        viewModel = new ViewModelProvider(this).get(CollectionDetailsViewModel.class);
+        assert getArguments() != null;
+        int collectionId = CollectionDetailsArgs.fromBundle(getArguments()).getCollectionID();
+        String collectionName = CollectionDetailsArgs
+                .fromBundle(getArguments()).getCollectionName();
+        binding.appBarTvLocation.setText(collectionName);
+        viewModel.getSearchResponseLiveData(collectionId)
+                .observe(getViewLifecycleOwner(), searchResponse ->
+                        adapter.setData(searchResponse.getRestaurantContainers()));
+        return binding.getRoot();
+    }
+
+    private void setupRecyclerView() {
+        adapter = new RestaurantAdapter(requireContext());
+        binding.rvCollectionsDetails.setAdapter(adapter);
+        binding.rvCollectionsDetails.setLayoutManager(new LinearLayoutManager(requireContext()));
+
+        new RecyclerTouchListener(requireContext(),
+                binding.rvCollectionsDetails, (view, position) -> {
+            CollectionDetailsDirections.ActionCollectionDetailsToRestaurantDetails action =
+                    CollectionDetailsDirections.actionCollectionDetailsToRestaurantDetails(
+                            Integer.parseInt(adapter.getData().get(position)
+                                    .getRestaurant().getId()));
+
+            NavHostFragment.findNavController(this).navigate(action);
+        });
+    }
+}

app/src/main/java/com/tip/lunchbox/view/fragment/HomeFragment.java

@@ -1,7 +1,6 @@
 package com.tip.lunchbox.view.fragment;
 
 import android.animation.Animator;
-import android.content.Intent;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -28,8 +27,6 @@
 import com.tip.lunchbox.model.CategoryContainer;
 import com.tip.lunchbox.model.Restaurant;
 import com.tip.lunchbox.model.RestaurantContainer;
-import com.tip.lunchbox.utilities.Constants;
-import com.tip.lunchbox.view.activity.RestaurantDetails;
 import com.tip.lunchbox.view.listeners.CategoryChangeListener;
 import com.tip.lunchbox.view.adapter.RestaurantAdapter;
 import com.tip.lunchbox.view.listeners.RecyclerTouchListener;
@@ -39,7 +36,6 @@
 
 import java.util.ArrayList;
 import java.util.List;
-import java.util.Objects;
 import java.util.concurrent.TimeUnit;
 
 import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
@@ -74,12 +70,14 @@ public View onCreateView(@NotNull LayoutInflater inflater,
         adapter = new RestaurantAdapter(getActivity());
 
         new RecyclerTouchListener(getActivity(), homeBinding.rvRestaurant, (view, position) -> {
-            Intent intent = new Intent(getContext(), RestaurantDetails.class);
-            intent.putExtra(Constants.INTENT_RES_ID, adapter.getData().get(position)
-                    .getRestaurant().getId());
-            requireActivity().startActivity(intent);
-        });
+            HomeFragmentDirections.ActionHomeFragmentToRestaurantDetails action =
+                    HomeFragmentDirections.actionHomeFragmentToRestaurantDetails(
+                    Integer.parseInt(adapter.getData().get(position)
+                            .getRestaurant().getId()));
 
+            NavHostFragment.findNavController(this).navigate(action);
+        });
+        onError();
         BottomSheetBehavior.from(homeBinding.nsvRestaurantList);
         homeBinding.rvRestaurant.setLayoutManager(new LinearLayoutManager(getActivity()));
         homeBinding.rvRestaurant.setAdapter(adapter);
@@ -109,13 +107,23 @@ private void showData() {
         homeBinding.rvRestaurant.setVisibility(View.VISIBLE);
     }
 
+    private void onError() {
+        viewModel.getIsErrorLiveData().observe(getViewLifecycleOwner(), aBoolean -> {
+            if (aBoolean) {
+                showErrorView();
+            } else {
+                showData();
+            }
+        });
+    }
+
     private void loadData() {
         showLoadingView();
         viewModel.getCategoriesLiveData().observe(getViewLifecycleOwner(), categoryResponse -> {
             if (categoryResponse != null) {
                 List<CategoryContainer> categories = categoryResponse.getCategories();
                 for (CategoryContainer categoryContainer : categories) {
-                    Chip categoryChip = (Chip)(getLayoutInflater()
+                    Chip categoryChip = (Chip) (getLayoutInflater()
                             .inflate(R.layout.item_chip_category, homeBinding.filterChipGroup,
                                     false));
                     categoryChip.setText(categoryContainer.getCategories().getName());
@@ -171,8 +179,8 @@ public void onAnimationRepeat(Animator animation) {
                 showData();
 
                 homeBinding.appBarTvLocation.setText(geoCodeResponse.getLocality().getTitle()
-                                + ", "
-                                + geoCodeResponse.getLocality().getCityName());
+                        + ", "
+                        + geoCodeResponse.getLocality().getCityName());
                 setMapMarkers(geoCodeResponse.getNearbyRestaurantContainers());
             } else {
                 showErrorView();