使用URL_Launcher软件包时出现颤动错误

Question

从昨天开始，当我在url_launcher包中使用GestureDetector时，我得到了这个错误：

E/flutter (17573): #0      _musicAreaState._launchURL (package:GiramosApp/ui/views/home_screen/widgets/music_area.dart:37:7)
E/flutter (17573): <asynchronous suspension>
E/flutter (17573): #1      _musicAreaState.build.<anonymous closure> (package:GiramosApp/ui/views/home_screen/widgets/music_area.dart:55:13)
E/flutter (17573): #2      GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:183:24)
E/flutter (17573): #3      TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:598:11)
E/flutter (17573): #4      BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:287:5)
E/flutter (17573): #5      BaseTapGestureRecognizer.acceptGesture (package:flutter/src/gestures/tap.dart:259:7)
E/flutter (17573): #6      GestureArenaManager.sweep (package:flutter/src/gestures/arena.dart:157:27)
E/flutter (17573): #7      GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:224:20)
E/flutter (17573): #8      GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:200:22)
E/flutter (17573): #9      RendererBinding.dispatchEvent (package:flutter/src/rendering/binding.dart:263:11)
E/flutter (17573): #10     GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:157:7)
E/flutter (17573): #11     GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:103:7)
E/flutter (17573): #12     GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:87:7)
E/flutter (17573): #13     _rootRunUnary (dart:async/zone.dart:1206:13)
E/flutter (17573): #14     _CustomZone.runUnary (dart:async/zone.dart:1100:19)
E/flutter (17573): #15     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1005:7)
E/flutter (17573): #16     _invoke1 (dart:ui/hooks.dart:265:10)
E/flutter (17573): #17     _dispatchPointerDataPacket (dart:ui/hooks.dart:174:5)
E/flutter (17573): ```

Any thoughts?

Answer 1

我发现了这个错误，我不知道为什么，但删除异步函数是可行的。所以，结果是：

launchUrl(url) {
   launch(url);
 }

在iOS上，它可以使用异步风格，但在安卓上就不行了。

Answer 2

使用给定的here步骤正确安装软件包。您应该在pubspec.yaml文件中添加url_launcher的依赖项。如果你这么做了，

要解决此问题，您应该使用flutter clean清理项目，然后使用flutter upgrade升级flutter。这肯定会解决这个问题。如果没有，则创建一个新项目，然后将代码粘贴到其中。