MissingPluginException（MissingPluginException（在通道 plugins.flutter.io/google_maps_53 上找不到方法 camera#an
Posted
技术标签:
【中文标题】MissingPluginException（MissingPluginException（在通道 plugins.flutter.io/google_maps_53 上找不到方法 camera#animate 的实现））【英文标题】：MissingPluginException (MissingPluginException(No implementation found for method camera#animate on channel plugins.flutter.io/google_maps_53)) 【发布时间】：2020-10-20 08:25:10 【问题描述】：我最近在我的 Flutter 应用中安装了谷歌地图，但我不断收到此错误，
这发生在我调用的每个地图控制器上，即使 oncreated 方法也会给我同样的问题，我首先尝试了 flutter clean 和 flutter pub get after 但无济于事，现在我不知道
这是我创建地图的主要 dart 文件
GoogleMap(
mapToolbarEnabled: false,
mapType: MapType.normal,
initialCameraPosition: CameraPosition(target:appState.initialPosition, zoom: 15.0),
markers: appState.markers,
onCameraMove: appState.onCameraMove,
polylines: appState.polyLines,
myLocationEnabled: true,
zoomControlsEnabled: false,
onMapCreated: appState.onCreated,compassEnabled: false,
myLocationButtonEnabled: false,
),
这是我单独的 appstate.dart 文件
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:geolocator/geolocator.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
import 'package:toladriver/requests/google_maps_requests.dart';
class AppState with ChangeNotifier
static LatLng _initialPosition;
LatLng _lastPosition = _initialPosition;
bool locationServiceActive = true;
final Set<Marker> _markers = ;
final Set<Polyline> _polyLines = ;
GoogleMapController _mapController;
GoogleMapsServices _googleMapsServices = GoogleMapsServices();
TextEditingController locationController = TextEditingController();
TextEditingController destinationController = TextEditingController();
LatLng get initialPosition => _initialPosition;
LatLng get lastPosition => _lastPosition;
GoogleMapsServices get googleMapsServices => _googleMapsServices;
GoogleMapController get mapController => _mapController;
Set<Marker> get markers => _markers;
Set<Polyline> get polyLines => _polyLines;
AppState()
_getUserLocation();
_loadingInitialPosition();
// ! TO GET THE USERS LOCATION
void _getUserLocation() async
print("GET USER METHOD RUNNING =========");
Position position = await Geolocator()
.getCurrentPosition(desiredAccuracy: LocationAccuracy.high);
List<Placemark> placemark = await Geolocator()
.placemarkFromCoordinates(position.latitude, position.longitude);
_initialPosition = LatLng(position.latitude, position.longitude);
print("the latitude is: $position.longitude and th longitude is: $position.longitude ");
print("initial position is : $_initialPosition.toString()");
locationController.text = placemark[0].name;
notifyListeners();
// ! TO CREATE ROUTE
void createRoute(String encondedPoly)
_polyLines.add(Polyline(
polylineId: PolylineId(_lastPosition.toString()),
width: 5,
points: _convertToLatLng(_decodePoly(encondedPoly)),
color: Colors.blueGrey));
notifyListeners();
// ! ADD A MARKER ON THE MAO
void _addMarker(LatLng location, String address)
_markers.add(Marker(
markerId: MarkerId(_lastPosition.toString()),
position: location,
infoWindow: InfoWindow(title: address, snippet: "go here"),
icon: BitmapDescriptor.defaultMarker));
notifyListeners();
// ! CREATE LAGLNG LIST
List<LatLng> _convertToLatLng(List points)
List<LatLng> result = <LatLng>[];
for (int i = 0; i < points.length; i++)
if (i % 2 != 0)
result.add(LatLng(points[i - 1], points[i]));
return result;
// !DECODE POLY
List _decodePoly(String poly)
var list = poly.codeUnits;
var lList = new List();
int index = 0;
int len = poly.length;
int c = 0;
// repeating until all attributes are decoded
do
var shift = 0;
int result = 0;
// for decoding value of one attribute
do
c = list[index] - 63;
result |= (c & 0x1F) << (shift * 5);
index++;
shift++;
while (c >= 32);
/* if value is negetive then bitwise not the value */
if (result & 1 == 1)
result = ~result;
var result1 = (result >> 1) * 0.00001;
lList.add(result1);
while (index < len);
/*adding to previous value as done in encoding */
for (var i = 2; i < lList.length; i++) lList[i] += lList[i - 2];
print(lList.toString());
return lList;
// ! SEND REQUEST
void sendRequest(String intendedLocation) async
if(intendedLocation != null)
List<Placemark> placemark =
await Geolocator().placemarkFromAddress(intendedLocation);
double latitude = placemark[0].position.latitude;
double longitude = placemark[0].position.longitude;
LatLng destination = LatLng(latitude, longitude);
_addMarker(destination, intendedLocation);
String route = await _googleMapsServices.getRouteCoordinates(
_initialPosition, destination);
createRoute(route);
notifyListeners();
// ! ON CAMERA MOVE
void onCameraMove(CameraPosition position)
_lastPosition = position.target;
notifyListeners();
// ! ON CREATE
void onCreated(GoogleMapController controller)
_mapController = controller;
mapController.setMapStyle('[ "featureType": "all", "elementType": "labels.text.fill", "stylers": [ "color": "#7c93a3" , "lightness": "-10" ] , "featureType": "administrative.country", "elementType": "geometry", "stylers": [ "visibility": "on" ] , "featureType": "administrative.country", "elementType": "geometry.stroke", "stylers": [ "color": "#a0a4a5" ] , "featureType": "administrative.province", "elementType": "geometry.stroke", "stylers": [ "color": "#62838e" ] , "featureType": "landscape", "elementType": "geometry.fill", "stylers": [ "color": "#dde3e3" ] , "featureType": "landscape.man_made", "elementType": "geometry.stroke", "stylers": [ "color": "#3f4a51" , "weight": "0.30" ] , "featureType": "poi", "elementType": "all", "stylers": [ "visibility": "simplified" ] , "featureType": "poi.attraction", "elementType": "all", "stylers": [ "visibility": "on" ] , "featureType": "poi.business", "elementType": "all", "stylers": [ "visibility": "off" ] , "featureType": "poi.government", "elementType": "all", "stylers": [ "visibility": "off" ] , "featureType": "poi.park", "elementType": "all", "stylers": [ "visibility": "on" ] , "featureType": "poi.place_of_worship", "elementType": "all", "stylers": [ "visibility": "off" ] , "featureType": "poi.school", "elementType": "all", "stylers": [ "visibility": "off" ] , "featureType": "poi.sports_complex", "elementType": "all", "stylers": [ "visibility": "off" ] , "featureType": "road", "elementType": "all", "stylers": [ "saturation": "-100" , "visibility": "on" ] , "featureType": "road", "elementType": "geometry.stroke", "stylers": [ "visibility": "on" ] , "featureType": "road.highway", "elementType": "geometry.fill", "stylers": [ "color": "#bbcacf" ] , "featureType": "road.highway", "elementType": "geometry.stroke", "stylers": [ "lightness": "0" , "color": "#bbcacf" , "weight": "0.50" ] , "featureType": "road.highway", "elementType": "labels", "stylers": [ "visibility": "on" ] , "featureType": "road.highway", "elementType": "labels.text", "stylers": [ "visibility": "on" ] , "featureType": "road.highway.controlled_access", "elementType": "geometry.fill", "stylers": [ "color": "#ffffff" ] , "featureType": "road.highway.controlled_access", "elementType": "geometry.stroke", "stylers": [ "color": "#a9b4b8" ] , "featureType": "road.arterial", "elementType": "labels.icon", "stylers": [ "invert_lightness": true , "saturation": "-7" , "lightness": "3" , "gamma": "1.80" , "weight": "0.01" ] , "featureType": "transit", "elementType": "all", "stylers": [ "visibility": "off" ] , "featureType": "water", "elementType": "geometry.fill", "stylers": [ "color": "#a3c7df" ] ]');
notifyListeners();
// FLOATING BUTTON TO LOCATION
void toUserLocation()
_mapController.animateCamera(
CameraUpdate.newCameraPosition(
CameraPosition(
target: initialPosition, zoom: 15.0),
),
);
void centerMap(String intendedLocation) async
List<Placemark> placemark =
await Geolocator().placemarkFromAddress(intendedLocation);
double latitude = placemark[0].position.latitude;
double longitude = placemark[0].position.longitude;
LatLng goToDestination = LatLng(latitude, longitude);
_mapController.animateCamera(
CameraUpdate.newLatLngBounds(
LatLngBounds(
southwest: LatLng(
_initialPosition.latitude <= goToDestination.latitude
? _initialPosition.latitude
: goToDestination.latitude,
_initialPosition.longitude <= goToDestination.longitude
? _initialPosition.longitude
: goToDestination.longitude),
northeast: LatLng(
_initialPosition.latitude <= goToDestination.latitude
? goToDestination.latitude
: _initialPosition.latitude,
_initialPosition.longitude <= goToDestination.longitude
? goToDestination.longitude
: _initialPosition.longitude)),10.0),
);
void clearMap()
_polyLines.clear();
_markers.clear();
_mapController.animateCamera(
CameraUpdate.newCameraPosition(
CameraPosition(
target: initialPosition, zoom: 15.0),
),
);_mapController.animateCamera(
CameraUpdate.newCameraPosition(
CameraPosition(
target: initialPosition, zoom: 15.0),
),
);
// LOADING INITIAL POSITION
void _loadingInitialPosition()async
await Future.delayed(Duration(seconds: 5)).then((v)
if(_initialPosition == null)
locationServiceActive = false;
notifyListeners();
);
这是我的 pubspec.yaml 文件
name: toladriver
description: A new Flutter project.
version: 1.0.0+1
environment:
sdk: ">=2.7.0 <3.0.0"
dependencies:
flutter:
sdk: flutter
geolocator: 5.3.2+2
provider: 4.1.3
http: 0.12.1
flutter_google_places: 0.2.5
geocoder: 0.2.1
fluttertoast : 4.0.1
flutter_spinkit: "^2.1.0"
slide_countdown_clock: 1.0.3
google_maps_flutter: 0.5.28+1
google_maps_webservice: 0.0.17
cupertino_icons: ^0.1.3
dev_dependencies:
flutter_test:
sdk: flutter
flutter:
uses-material-design: true
fonts:
- family: Clan-Medium
fonts:
- asset: fonts/clan-book-webfont.ttf
- asset: fonts/clan-med-webfont.ttf
【问题讨论】：
Mac 你能解决这个问题吗？ 【参考方案1】：需要添加如下依赖：
dependencies:
google_maps_flutter: ^0.5.28+1
https://pub.dev/packages/google_maps_flutter#-installing-tab-
【讨论】：
我做到了，我仍然得到一个空白屏幕并且抛出一个插件异常【参考方案2】：确认您的 Google 地图 API 密钥是否有效。验证密钥时会引发该错误。
【讨论】：
以上是关于MissingPluginException（MissingPluginException（在通道 plugins.flutter.io/google_maps_53 上找不到方法 camera#an的主要内容，如果未能解决你的问题，请参考以下文章
MissingPluginException（未找到通道上的方法的实现）
GoogleMaps Flutter 插件 MissingPluginException
发布模式android中的MissingPluginException
尝试直接从 FLUTTER 发出呼叫：MissingPluginException（未找到方法 callNumber 的实现
android Unhandled Exception 上的 Flutter 运行错误：MissingPluginException（未找到方法的实现）
MissingPluginException（在通道 com.amazonaws.amplify/amplify 上找不到方法配置的实现）