Add Support fragment inside a fragment and proves that layered fragmentw with map works

app/src/main/java/fr/free/nrw/commons/nearby/NearbyTestFragmentLayersActivity.java

@@ -1,6 +1,14 @@
 package fr.free.nrw.commons.nearby;
 
+import android.os.Bundle;
+
+import fr.free.nrw.commons.R;
 import fr.free.nrw.commons.theme.NavigationBaseActivity;
 
 public class NearbyTestFragmentLayersActivity extends NavigationBaseActivity {
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_nearby_test_fragment_layers);
+    }
 }

app/src/main/java/fr/free/nrw/commons/nearby/NearbyTestLayersFragment.java

@@ -0,0 +1,84 @@
+package fr.free.nrw.commons.nearby;
+
+import android.os.Bundle;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentTransaction;
+
+import com.mapbox.mapboxsdk.Mapbox;
+import com.mapbox.mapboxsdk.camera.CameraPosition;
+import com.mapbox.mapboxsdk.geometry.LatLng;
+import com.mapbox.mapboxsdk.maps.MapboxMap;
+import com.mapbox.mapboxsdk.maps.MapboxMapOptions;
+import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
+import com.mapbox.mapboxsdk.maps.Style;
+import com.mapbox.mapboxsdk.maps.SupportMapFragment;
+
+import fr.free.nrw.commons.R;
+
+import static fr.free.nrw.commons.contributions.ContributionsFragment.CONTRIBUTION_LIST_FRAGMENT_TAG;
+
+public class NearbyTestLayersFragment extends Fragment {
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_simple, container, false);
+
+    }
+
+    @Override
+    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+
+        // Mapbox access token is configured here. This needs to be called either in your application
+        // object or in the same activity which contains the mapview.
+        Mapbox.getInstance(getActivity(), getString(R.string.mapbox_commons_app_token));
+
+        // Create supportMapFragment
+        SupportMapFragment mapFragment;
+        if (savedInstanceState == null) {
+
+            // Create fragment
+            FragmentTransaction transaction = getChildFragmentManager().beginTransaction();
+
+            // Build mapboxMap
+            MapboxMapOptions options = MapboxMapOptions.createFromAttributes(getActivity(), null);
+            options.camera(new CameraPosition.Builder()
+                    .target(new LatLng(-52.6885, -70.1395))
+                    .zoom(9)
+                    .build());
+
+            // Create map fragment
+            mapFragment = SupportMapFragment.newInstance(options);
+
+            // Add map fragment to parent container
+            getChildFragmentManager().executePendingTransactions();
+            transaction.add(R.id.container, mapFragment, "com.mapbox.map");
+            transaction.commit();
+        } else {
+            mapFragment = (SupportMapFragment) getChildFragmentManager().findFragmentByTag("com.mapbox.map");
+        }
+
+        mapFragment.getMapAsync(new OnMapReadyCallback() {
+            @Override
+            public void onMapReady(@NonNull MapboxMap mapboxMap) {
+
+                mapboxMap.setStyle(Style.SATELLITE, new Style.OnStyleLoaded() {
+                    @Override
+                    public void onStyleLoaded(@NonNull Style style) {
+                        Log.d("NearbyTests","Fragment inside fragment with map works");
+                        // Map is set up and the style has loaded. Now you can add data or make other map adjustments
+
+                    }
+                });
+            }
+        });
+    }
+}

app/src/main/res/layout/activity_nearby_test_fragment_layers.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical" android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <fragment android:name="fr.free.nrw.commons.nearby.NearbyTestLayersFragment"
+        android:id="@+id/fragment"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        />
+
+</LinearLayout>

app/src/main/res/layout/fragment_simple.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical" android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <FrameLayout
+        android:id="@+id/container"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+</LinearLayout>