══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
I/flutter (23709): The following NoSuchMethodError was thrown building StreamBuilder<int>(dirty, state:
I/flutter (23709): _StreamBuilderBaseState<int, AsyncSnapshot<int>>#4edd9):
I/flutter (23709): The method 'call' was called on null.
I/flutter (23709): Receiver: null
I/flutter (23709): Tried calling: call()
I/flutter (23709):
I/flutter (23709): The relevant error-causing widget was:
I/flutter (23709): StreamBuilder<int>
I/flutter (23709): file:///C:/Users/Dixmi/AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_map-0.9.0/lib/src/layer/marker_layer.dart:110:12
I/flutter (23709):
I/flutter (23709): When the exception was thrown, this was the stack:
I/flutter (23709): #0 MarkerLayer.build.<anonymous closure> (package:flutter_map/src/layer/marker_layer.dart:134:39)
I/flutter (23709): #1 StreamBuilder.build (package:flutter/src/widgets/async.dart:509:81)
I/flutter (23709): #2 _StreamBuilderBaseState.build (package:flutter/src/widgets/async.dart:127:48)
I/flutter (23709): #3 StatefulElement.build (package:flutter/src/widgets/framework.dart:4619:28)
I/flutter (23709): #4 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4502:15)
I/flutter (23709): #5 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4675:11)
I/flutter (23709): #6 Element.rebuild (package:flutter/src/widgets/framework.dart:4218:5)
I/flutter (23709): #7 StatefulElement.update (package:flutter/src/widgets/framework.dart:4707:5)
I/flutter (23709): #8 Element.updateChild (package:flutter/src/widgets/framework.dart:3201:15)
I/flutter (23709): #9 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4527:16)
I/flutter (23709): #10 Element.rebuild (package:flutter/src/widgets/framework.dart:4218:5)
I/flutter (23709): #11 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2627:33)
I/flutter (23709): #12 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:883:20)
I/flutter (23709): #13 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:284:5)
I/flutter (23709): #14 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1113:15)
I/flutter (23709): #15 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1052:9)
I/flutter (23709): #16 SchedulerBinding.scheduleWarmUpFrame.<anonymous closure> (package:flutter/src/scheduler/binding.dart:861:7)
I/flutter (23709): (elided 4 frames from class _RawReceivePortImpl, class _Timer, and dart:async-patch)
I/flutter (23709):
I/flutter (23709): ════════════════════════════════════════════════════════════════════════════════════════════════════
flutter doctor -v
[√] Flutter (Channel stable, v1.17.5, on Microsoft Windows [version 10.0.18363.959], locale
fr-FR)
• Flutter version 1.17.5 at D:\Lib\flutter
• Framework revision 8af6b2f038 (5 weeks ago), 2020-06-30 12:53:55 -0700
• Engine revision ee76268252
• Dart version 2.8.4
[√] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
• Android SDK at C:\Users\Dixmi\AppData\Local\Android\sdk
• Platform android-29, build-tools 29.0.3
• Java binary at: D:\Program Files\Android\Android Studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
• All Android licenses accepted.
[√] Android Studio (version 4.0)
• Android Studio at D:\Program Files\Android\Android Studio
• Flutter plugin version 48.0.2
• Dart plugin version 193.7361
• Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
[√] Connected device (1 available)
• Redmi Note 8T • 141e86a0 • android-arm64 • Android 9 (API 28)
• No issues found!I have this exception every times I try to add multiples markers at once.
Here is a part of the code I use :
var usersObject = Users.fromJson(Map<String, dynamic>.from(jsonDecode(users)));
setState(() {
mapController.addMarkers(markers: usersObject.toMarkers());
});And this is the Users class :
class Users {
Users(this.names, this.locations);
factory Users.fromJson(Map<String, dynamic> json) {
var names = json.keys.toList();
var locations = <Location>[];
json.forEach((key, value) {
locations.add(Location(
latitude: value['latitude'],
longitude: value['longitude'],
accuracy: value['accuracy']));
});
return Users(names, locations);
}
List<String> names;
List<Location> locations;
Map<String, dynamic> toJson() {
var map = <String, dynamic>{};
names.forEach((element) {
var index = names.indexOf(element);
map.addAll({
element: {
'latitude': locations[index].latitude,
'longitude': locations[index].longitude,
'accuracy': locations[index].accuracy,
}
});
});
return map;
}
Map<String, Marker> toMarkers() {
var map = <String, Marker>{};
names.forEach((element) {
var index = names.indexOf(element);
map.addAll({
element: Marker(
point:
LatLng(locations[index].latitude, locations[index].longitude))
});
});
return map;
}
}JSON Pattern :
{
"Test 2":
{
"latitude": <value>,
"longitude": <value>,
"accuracy": <value>
},
"Test":
{
"latitude": <value>,
"longitude": <value>,
"accuracy": <value>
},
"Test 3":
{
"latitude": <value>,
"longitude": <value>,
"accuracy": <value>
}
}I'm using Location from background_location but values are the same.
For LatLng I'm using latlong.dart
Is anyone can help me on this plz ?
I have this exception every times I try to add multiples markers at once.
Here is a part of the code I use :
And this is the Users class :
JSON Pattern :
{ "Test 2": { "latitude": <value>, "longitude": <value>, "accuracy": <value> }, "Test": { "latitude": <value>, "longitude": <value>, "accuracy": <value> }, "Test 3": { "latitude": <value>, "longitude": <value>, "accuracy": <value> } }I'm using Location from background_location but values are the same.
For LatLng I'm using latlong.dart
Is anyone can help me on this plz ?