[google_maps_flutter] Custom marker size improvements - platform impls (#6826)

Platform implementations portion of : #4055

Adds platform handling for new BitmapDescriptor classes `AssetMapBitmap` and `BytesMapBitmap` introduced in #6687

Containing only changes to packages
 * `google_maps_flutter_android`
 * `google_maps_flutter_ios`
 * `google_maps_flutter_web`

Follow up PR will hold the app-facing plugin implementations.

Linked issue: flutter/flutter#34657

Author: jokerttu

packages/google_maps_flutter/google_maps_flutter_android/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.9.0
+
+* Adds support for BitmapDescriptor classes `AssetMapBitmap` and `BytesMapBitmap`.
+
 ## 2.8.1
 
 * Updates minimum supported SDK version to Flutter 3.22/Dart 3.4.

packages/google_maps_flutter/google_maps_flutter_android/android/src/main/java/io/flutter/plugins/googlemaps/Convert.java

@@ -8,6 +8,7 @@
 import android.annotation.SuppressLint;
 import android.content.Context;
 import android.content.pm.PackageManager;
+import android.content.res.AssetManager;
 import android.graphics.Bitmap;
 import android.graphics.Point;
 import android.graphics.SurfaceTexture;
@@ -115,11 +116,13 @@ class GoogleMapController
     methodChannel =
         new MethodChannel(binaryMessenger, "plugins.flutter.dev/google_maps_android_" + id);
     methodChannel.setMethodCallHandler(this);
+    AssetManager assetManager = context.getAssets();
     this.lifecycleProvider = lifecycleProvider;
     this.clusterManagersController = new ClusterManagersController(methodChannel, context);
-    this.markersController = new MarkersController(methodChannel, clusterManagersController);
+    this.markersController =
+        new MarkersController(methodChannel, clusterManagersController, assetManager, density);
     this.polygonsController = new PolygonsController(methodChannel, density);
-    this.polylinesController = new PolylinesController(methodChannel, density);
+    this.polylinesController = new PolylinesController(methodChannel, assetManager, density);
     this.circlesController = new CirclesController(methodChannel, density);
     this.tileOverlaysController = new TileOverlaysController(methodChannel);
   }

packages/google_maps_flutter/google_maps_flutter_android/android/src/main/java/io/flutter/plugins/googlemaps/GoogleMapController.java

@@ -4,6 +4,7 @@
 
 package io.flutter.plugins.googlemaps;
 
+import android.content.res.AssetManager;
 import com.google.android.gms.maps.model.LatLng;
 import com.google.android.gms.maps.model.Marker;
 import com.google.android.gms.maps.model.MarkerOptions;
@@ -21,14 +22,21 @@ class MarkersController {
   private final MethodChannel methodChannel;
   private MarkerManager.Collection markerCollection;
   private final ClusterManagersController clusterManagersController;
+  private final AssetManager assetManager;
+  private final float density;
 
   MarkersController(
-      MethodChannel methodChannel, ClusterManagersController clusterManagersController) {
+      MethodChannel methodChannel,
+      ClusterManagersController clusterManagersController,
+      AssetManager assetManager,
+      float density) {
     this.markerIdToMarkerBuilder = new HashMap<>();
     this.markerIdToController = new HashMap<>();
     this.googleMapsMarkerIdToDartMarkerId = new HashMap<>();
     this.methodChannel = methodChannel;
     this.clusterManagersController = clusterManagersController;
+    this.assetManager = assetManager;
+    this.density = density;
   }
 
   void setCollection(MarkerManager.Collection markerCollection) {
@@ -192,7 +200,7 @@ private void addMarker(Object marker) {
     }
     String clusterManagerId = getClusterManagerId(marker);
     MarkerBuilder markerBuilder = new MarkerBuilder(markerId, clusterManagerId);
-    Convert.interpretMarkerOptions(marker, markerBuilder);
+    Convert.interpretMarkerOptions(marker, markerBuilder, assetManager, density);
     addMarker(markerBuilder);
   }
 
@@ -251,12 +259,12 @@ private void changeMarker(Object marker) {
     }
 
     // Update marker builder.
-    Convert.interpretMarkerOptions(marker, markerBuilder);
+    Convert.interpretMarkerOptions(marker, markerBuilder, assetManager, density);
 
     // Update existing marker on map.
     MarkerController markerController = markerIdToController.get(markerId);
     if (markerController != null) {
-      Convert.interpretMarkerOptions(marker, markerController);
+      Convert.interpretMarkerOptions(marker, markerController, assetManager, density);
     }
   }
 

packages/google_maps_flutter/google_maps_flutter_android/android/src/main/java/io/flutter/plugins/googlemaps/MarkersController.java

@@ -4,6 +4,7 @@
 
 package io.flutter.plugins.googlemaps;
 
+import android.content.res.AssetManager;
 import com.google.android.gms.maps.GoogleMap;
 import com.google.android.gms.maps.model.Polyline;
 import com.google.android.gms.maps.model.PolylineOptions;
@@ -19,8 +20,10 @@ class PolylinesController {
   private final MethodChannel methodChannel;
   private GoogleMap googleMap;
   private final float density;
+  private final AssetManager assetManager;
 
-  PolylinesController(MethodChannel methodChannel, float density) {
+  PolylinesController(MethodChannel methodChannel, AssetManager assetManager, float density) {
+    this.assetManager = assetManager;
     this.polylineIdToController = new HashMap<>();
     this.googleMapsPolylineIdToDartPolylineId = new HashMap<>();
     this.methodChannel = methodChannel;
@@ -82,7 +85,8 @@ private void addPolyline(Object polyline) {
       return;
     }
     PolylineBuilder polylineBuilder = new PolylineBuilder(density);
-    String polylineId = Convert.interpretPolylineOptions(polyline, polylineBuilder);
+    String polylineId =
+        Convert.interpretPolylineOptions(polyline, polylineBuilder, assetManager, density);
     PolylineOptions options = polylineBuilder.build();
     addPolyline(polylineId, options, polylineBuilder.consumeTapEvents());
   }
@@ -102,7 +106,7 @@ private void changePolyline(Object polyline) {
     String polylineId = getPolylineId(polyline);
     PolylineController polylineController = polylineIdToController.get(polylineId);
     if (polylineController != null) {
-      Convert.interpretPolylineOptions(polyline, polylineController);
+      Convert.interpretPolylineOptions(polyline, polylineController, assetManager, density);
     }
   }
 

packages/google_maps_flutter/google_maps_flutter_android/android/src/main/java/io/flutter/plugins/googlemaps/PolylinesController.java

@@ -14,6 +14,7 @@
 import static org.mockito.Mockito.when;
 
 import android.content.Context;
+import android.content.res.AssetManager;
 import android.os.Build;
 import androidx.test.core.app.ApplicationProvider;
 import com.google.android.gms.maps.GoogleMap;
@@ -34,6 +35,7 @@
 import org.junit.runner.RunWith;
 import org.mockito.ArgumentCaptor;
 import org.mockito.Mockito;
+import org.mockito.MockitoAnnotations;
 import org.robolectric.RobolectricTestRunner;
 import org.robolectric.annotation.Config;
 
@@ -46,10 +48,14 @@ public class ClusterManagersControllerTest {
   private GoogleMap googleMap;
   private MarkerManager markerManager;
   private MarkerManager.Collection markerCollection;
+  private AssetManager assetManager;
+  private final float density = 1;
 
   @Before
   public void setUp() {
+    MockitoAnnotations.openMocks(this);
     context = ApplicationProvider.getApplicationContext();
+    assetManager = context.getAssets();
     methodChannel =
         spy(new MethodChannel(mock(BinaryMessenger.class), "no-name", mock(MethodCodec.class)));
     controller = spy(new ClusterManagersController(methodChannel, context));
@@ -93,8 +99,8 @@ public void AddClusterManagersAndMarkers() throws InterruptedException {
     final Map<String, Object> markerData2 =
         createMarkerData(markerId2, location2, clusterManagerId);
 
-    Convert.interpretMarkerOptions(markerData1, markerBuilder1);
-    Convert.interpretMarkerOptions(markerData2, markerBuilder2);
+    Convert.interpretMarkerOptions(markerData1, markerBuilder1, assetManager, density);
+    Convert.interpretMarkerOptions(markerData2, markerBuilder2, assetManager, density);
 
     controller.addItem(markerBuilder1);
     controller.addItem(markerBuilder2);