本文介绍了使用插件扑动时MissingPluginException的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在尝试使用插件
_launchURL(url) async {
await launch("www.google.com");
}
我仅出于调试目的放置了"www.google.com".
I have put "www.google.com" just for debugging purposes.
我得到的错误是MissingPluginException:
The error I get is MissingPluginException :
E/flutter ( 8299): MissingPluginException(No implementation found for method launch on channel plugins.flutter.io/url_launcher)
E/flutter ( 8299): #0 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:278:7)
E/flutter ( 8299): <asynchronous suspension>
E/flutter ( 8299): #1 launch (package:url_launcher/url_launcher.dart:47:19)
E/flutter ( 8299): #2 _launchURL (file:///Users/matejsimunic/Work/dart/suhail/lib/main.dart:834:9)
E/flutter ( 8299): <asynchronous suspension>
E/flutter ( 8299): #3 _TripDetailBodyState.build.<anonymous closure> (file:///Users/matejsimunic/Work/dart/suhail/lib/main.dart:818:19)
E/flutter ( 8299): #4 _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:494:14)
E/flutter ( 8299): #5 _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:549:30)
E/flutter ( 8299): #6 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:102:24)
E/flutter ( 8299): #7 TapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:161:9)
E/flutter ( 8299): #8 TapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:94:7)
E/flutter ( 8299): #9 PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:315:9)
E/flutter ( 8299): #10 PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:73:12)
E/flutter ( 8299): #11 PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:101:11)
E/flutter ( 8299): #12 _WidgetsFlutterBinding&BindingBase&GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:143:19)
E/flutter ( 8299): #13 _WidgetsFlutterBinding&BindingBase&GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:121:22)
E/flutter ( 8299): #14 _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:101:7)
E/flutter ( 8299): #15 _WidgetsFlutterBinding&BindingBase&GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:64:7)
E/flutter ( 8299): #16 _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:48:7)
E/flutter ( 8299): #17 _invoke1 (dart:ui/hooks.dart:134:13)
E/flutter ( 8299): #18 _dispatchPointerDataPacket (dart:ui/hooks.dart:91:5)
从ide重新启动应用程序无效.
restarting the app from ide doesn't work.
推荐答案
如果您使用的是热重启或热重装，则不会成功.由于Flutter必须将插件依赖项注入到应用程序特定于平台的部分中，因此热重启/热重载不足以触发注入.有关更多信息，请查看此问题.
If you are using hot restart or hot reload, it won't do the trick.Since Flutter has to inject plugin dependencies into the platform-specific parts of your app, hot restart/hot reload is not enough to trigger the injection.Check this issue for more.
关闭应用程序并执行flutter run命令.
Close the app and execute flutter run command.
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