[google_maps_flutter] Add ability to animate camera with duration - platform impls (flutter#8659)

This PR contains platform implementations for the ability to animate camera with duration (flutter#7648).

Linked issue: flutter/flutter#39810
Linked issue: flutter/flutter#44284

Author: jokerttu

packages/google_maps_flutter/google_maps_flutter_android/CHANGELOG.md

@@ -1,7 +1,11 @@
+## 2.16.0
+
+* Adds support for animating the camera with a duration.
+
 ## 2.15.0
 
 * Adds support for ground overlay.
-  
+
 ## 2.14.14
 
 * Updates compileSdk 34 to flutter.compileSdkVersion.

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

@@ -26,6 +26,7 @@
 import androidx.lifecycle.DefaultLifecycleObserver;
 import androidx.lifecycle.Lifecycle;
 import androidx.lifecycle.LifecycleOwner;
+import com.google.android.gms.maps.CameraUpdate;
 import com.google.android.gms.maps.GoogleMap;
 import com.google.android.gms.maps.GoogleMapOptions;
 import com.google.android.gms.maps.MapView;
@@ -976,12 +977,18 @@ public void moveCamera(@NonNull Messages.PlatformCameraUpdate cameraUpdate) {
   }
 
   @Override
-  public void animateCamera(@NonNull Messages.PlatformCameraUpdate cameraUpdate) {
+  public void animateCamera(
+      @NonNull Messages.PlatformCameraUpdate cameraUpdate, @Nullable Long durationMilliseconds) {
     if (googleMap == null) {
       throw new FlutterError(
           "GoogleMap uninitialized", "animateCamera called prior to map initialization", null);
     }
-    googleMap.animateCamera(Convert.cameraUpdateFromPigeon(cameraUpdate, density));
+    CameraUpdate update = Convert.cameraUpdateFromPigeon(cameraUpdate, density);
+    if (durationMilliseconds != null) {
+      googleMap.animateCamera(update, durationMilliseconds.intValue(), null);
+    } else {
+      googleMap.animateCamera(update);
+    }
   }
 
   @Override
@@ -1100,6 +1107,11 @@ public Boolean isLiteModeEnabled() {
     return Objects.requireNonNull(googleMap).isTrafficEnabled();
   }
 
+  @Override
+  public @NonNull Messages.PlatformCameraPosition getCameraPosition() {
+    return Convert.cameraPositionToPigeon(Objects.requireNonNull(googleMap).getCameraPosition());
+  }
+
   @Override
   public @Nullable Messages.PlatformTileLayer getTileOverlayInfo(@NonNull String tileOverlayId) {
     TileOverlay tileOverlay = tileOverlaysController.getTileOverlay(tileOverlayId);

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

@@ -1,7 +1,7 @@
 // Copyright 2013 The Flutter Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-// Autogenerated from Pigeon (v22.7.3), do not edit directly.
+// Autogenerated from Pigeon (v22.7.4), do not edit directly.
 // See also: https://pub.dev/packages/pigeon
 
 package io.flutter.plugins.googlemaps;
@@ -6567,8 +6567,12 @@ void updateGroundOverlays(
     PlatformLatLngBounds getVisibleRegion();
     /** Moves the camera according to [cameraUpdate] immediately, with no animation. */
     void moveCamera(@NonNull PlatformCameraUpdate cameraUpdate);
-    /** Moves the camera according to [cameraUpdate], animating the update. */
-    void animateCamera(@NonNull PlatformCameraUpdate cameraUpdate);
+    /**
+     * Moves the camera according to [cameraUpdate], animating the update using a duration in
+     * milliseconds if provided.
+     */
+    void animateCamera(
+        @NonNull PlatformCameraUpdate cameraUpdate, @Nullable Long durationMilliseconds);
     /** Gets the current map zoom level. */
     @NonNull
     Double getZoomLevel();
@@ -6996,8 +7000,9 @@ public void error(Throwable error) {
                 ArrayList<Object> wrapped = new ArrayList<>();
                 ArrayList<Object> args = (ArrayList<Object>) message;
                 PlatformCameraUpdate cameraUpdateArg = (PlatformCameraUpdate) args.get(0);
+                Long durationMillisecondsArg = (Long) args.get(1);
                 try {
-                  api.animateCamera(cameraUpdateArg);
+                  api.animateCamera(cameraUpdateArg, durationMillisecondsArg);
                   wrapped.add(0, null);
                 } catch (Throwable exception) {
                   wrapped = wrapError(exception);
@@ -7809,6 +7814,9 @@ public interface MapsInspectorApi {
     @NonNull
     List<PlatformCluster> getClusters(@NonNull String clusterManagerId);
 
+    @NonNull
+    PlatformCameraPosition getCameraPosition();
+
     /** The codec used by MapsInspectorApi. */
     static @NonNull MessageCodec<Object> getCodec() {
       return PigeonCodec.INSTANCE;
@@ -8176,6 +8184,29 @@ static void setUp(
           channel.setMessageHandler(null);
         }
       }
+      {
+        BasicMessageChannel<Object> channel =
+            new BasicMessageChannel<>(
+                binaryMessenger,
+                "dev.flutter.pigeon.google_maps_flutter_android.MapsInspectorApi.getCameraPosition"
+                    + messageChannelSuffix,
+                getCodec());
+        if (api != null) {
+          channel.setMessageHandler(
+              (message, reply) -> {
+                ArrayList<Object> wrapped = new ArrayList<>();
+                try {
+                  PlatformCameraPosition output = api.getCameraPosition();
+                  wrapped.add(0, output);
+                } catch (Throwable exception) {
+                  wrapped = wrapError(exception);
+                }
+                reply.reply(wrapped);
+              });
+        } else {
+          channel.setMessageHandler(null);
+        }
+      }
     }
   }
 }

packages/google_maps_flutter/google_maps_flutter_android/android/src/test/java/io/flutter/plugins/googlemaps/GoogleMapControllerTest.java

@@ -7,16 +7,25 @@
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyFloat;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.ArgumentMatchers.isNull;
 import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.mockStatic;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
 
 import android.content.Context;
 import android.os.Build;
 import androidx.activity.ComponentActivity;
 import androidx.test.core.app.ApplicationProvider;
+import com.google.android.gms.maps.CameraUpdate;
+import com.google.android.gms.maps.CameraUpdateFactory;
 import com.google.android.gms.maps.GoogleMap;
+import com.google.android.gms.maps.model.CameraPosition;
+import com.google.android.gms.maps.model.LatLng;
 import com.google.android.gms.maps.model.Marker;
 import com.google.maps.android.clustering.ClusterManager;
 import io.flutter.plugin.common.BinaryMessenger;
@@ -28,6 +37,7 @@
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
+import org.mockito.MockedStatic;
 import org.mockito.MockitoAnnotations;
 import org.robolectric.Robolectric;
 import org.robolectric.RobolectricTestRunner;
@@ -250,4 +260,64 @@ public void UpdateHeatmaps() {
     verify(mockHeatmapsController, times(1)).changeHeatmaps(toChange);
     verify(mockHeatmapsController, times(1)).removeHeatmaps(idsToRemove);
   }
+
+  @Test
+  public void AnimateCamera() {
+    GoogleMapController googleMapController = getGoogleMapControllerWithMockedDependencies();
+    googleMapController.onMapReady(mockGoogleMap);
+
+    Messages.PlatformCameraUpdateZoomBy newCameraPosition =
+        new Messages.PlatformCameraUpdateZoomBy.Builder().setAmount(1.0).build();
+    Messages.PlatformCameraUpdate cameraUpdate =
+        new Messages.PlatformCameraUpdate.Builder().setCameraUpdate(newCameraPosition).build();
+
+    try (MockedStatic<CameraUpdateFactory> mockedFactory = mockStatic(CameraUpdateFactory.class)) {
+      mockedFactory
+          .when(() -> CameraUpdateFactory.zoomBy(anyFloat()))
+          .thenReturn(mock(CameraUpdate.class));
+      googleMapController.animateCamera(cameraUpdate, null);
+    }
+
+    verify(mockGoogleMap, times(1)).animateCamera(any(CameraUpdate.class));
+  }
+
+  @Test
+  public void AnimateCameraWithDuration() {
+    GoogleMapController googleMapController = getGoogleMapControllerWithMockedDependencies();
+    googleMapController.onMapReady(mockGoogleMap);
+
+    Messages.PlatformCameraUpdateZoomBy newCameraPosition =
+        new Messages.PlatformCameraUpdateZoomBy.Builder().setAmount(1.0).build();
+    Messages.PlatformCameraUpdate cameraUpdate =
+        new Messages.PlatformCameraUpdate.Builder().setCameraUpdate(newCameraPosition).build();
+
+    Long durationMilliseconds = 1000L;
+
+    try (MockedStatic<CameraUpdateFactory> mockedFactory = mockStatic(CameraUpdateFactory.class)) {
+      mockedFactory
+          .when(() -> CameraUpdateFactory.zoomBy(anyFloat()))
+          .thenReturn(mock(CameraUpdate.class));
+      googleMapController.animateCamera(cameraUpdate, durationMilliseconds);
+    }
+
+    verify(mockGoogleMap, times(1))
+        .animateCamera(any(CameraUpdate.class), eq(durationMilliseconds.intValue()), isNull());
+  }
+
+  @Test
+  public void getCameraPositionReturnsCorrectData() {
+    GoogleMapController googleMapController = getGoogleMapControllerWithMockedDependencies();
+    googleMapController.onMapReady(mockGoogleMap);
+
+    CameraPosition cameraPosition = new CameraPosition(new LatLng(10.0, 20.0), 15.0f, 30.0f, 45.0f);
+    when(mockGoogleMap.getCameraPosition()).thenReturn(cameraPosition);
+
+    Messages.PlatformCameraPosition result = googleMapController.getCameraPosition();
+
+    Assert.assertEquals(cameraPosition.target.latitude, result.getTarget().getLatitude(), 1e-15);
+    Assert.assertEquals(cameraPosition.target.longitude, result.getTarget().getLongitude(), 1e-15);
+    Assert.assertEquals(cameraPosition.zoom, result.getZoom(), 1e-15);
+    Assert.assertEquals(cameraPosition.tilt, result.getTilt(), 1e-15);
+    Assert.assertEquals(cameraPosition.bearing, result.getBearing(), 1e-15);
+  }
 }