在频道映射上未找到用于方法摄像机动画的实现

Question

无法工作

依赖版本= google_maps_flutter： ^2.1.6

实施代码

Future<void> _goToTheLake() async {
LatLng lat = LatLng(ctrl.getLat().value, ctrl.getLang().value);
print(lat);
final GoogleMapController controller = await _controller.future;
controller.animateCamera(
    CameraUpdate.newCameraPosition(
    CameraPosition(target: lat, zoom: 15.0)));
setState(() {});

}

E/flutter (15144): [ERROR:flutter/lib/ui/ui_dart_state.cc(198)] Unhandled Exception: MissingPluginException(No implementation found for method camera#animate on channel plugins.flutter.io/google_maps_0)
E/flutter (15144): #0      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:165:7)
E/flutter (15144): <asynchronous suspension>

“扑波图近年”按钮 解决方案请发表评论。

Answer 1

  ///map controller
  Completer<GoogleMapController> mapController = Completer();

  ///create map controller
  void onMapCreated(GoogleMapController controller) {
    if(!mapController.isCompleted){
      mapController.complete(controller);
    }
  }

  @override
  void dispose() {
    mapController = Completer();
    super.dispose();
  }

这对我来说很好

Answer 2

希望这会有所帮助

  Completer<GoogleMapController> _controller = Completer();


    if(!freezeMap) {
      _controller.future.then((value) =>

          value.animateCamera(
              CameraUpdate.newLatLngZoom(
                  LatLng(loc.lat, loc.long), zoomLevel)));
    }

Answer 3

dependency version = google_maps_flutter:

像这样留下您的依赖。如果仍然不起作用，请保存它
通过以下步骤：

在终端：

flutter clean

flutter pub get

flutter run

Answer 4

它不完全在文档中，而是在示例

这解决了我们的问题。

    void main() {
      final GoogleMapsFlutterPlatform platform = GoogleMapsFlutterPlatform.instance;
      // Default to Hybrid Composition for the example.
      (platform as GoogleMapsFlutterAndroid).useAndroidViewSurface = true;
      initializeMapRenderer();
      runApp(const MaterialApp(home: MapsDemo()));
    }
    
    Completer<AndroidMapRenderer?>? _initializedRendererCompleter;
    
    /// Initializes map renderer to the `latest` renderer type.
    ///
    /// The renderer must be requested before creating GoogleMap instances,
    /// as the renderer can be initialized only once per application context.
    Future<AndroidMapRenderer?> initializeMapRenderer() async {
      if (_initializedRendererCompleter != null) {
        return _initializedRendererCompleter!.future;
      }
    
      final Completer<AndroidMapRenderer?> completer =
          Completer<AndroidMapRenderer?>();
      _initializedRendererCompleter = completer;
    
      WidgetsFlutterBinding.ensureInitialized();
    
      final GoogleMapsFlutterPlatform platform = GoogleMapsFlutterPlatform.instance;
      unawaited((platform as GoogleMapsFlutterAndroid)
          .initializeWithRenderer(AndroidMapRenderer.latest)
          .then((AndroidMapRenderer initializedRenderer) =>
              completer.complete(initializedRenderer)));
    
      return completer.future;
    }

Answer 5

正如许多其他线程所说的那样，这个问题的答案是
mapController = ploteer（）;，

但对于许多人，在void dispose（）中都称其为不会解决您的问题。
如果您的googlemap（..） 内部的小部件（如果）在下面的示例

中，如果（loadSearch）？ ShowearchViewWidget（）：Showmapswidget（）;

您需要调用mapController = ploteer（）;其中loadsearch = true。

您可能已经了解了现在的工作原理。基本上，完成器完成后，当您调用等待_mapcontrollerComment.future;时，将始终尽快返回。不会等待googlemap（... onmapCreated（））完成。当您将loadSearch设置为false时，需要等待googlemap（... onmapCreated（））在调用动画之前。再次初始化mapcontroller时，当您将loadSearch设置为true时，将使等待_mapcontrollerCompleter.future;等待googlemap（... onmapCreated（... onmapCreated（））正确完成。