颤音：`camera_android`丢弃了一个错误：绑定尚未初始化

Question

回归。升级插件后，我的应用不再启动。

这是我的颤音规格：

上是最新的。

扑朔迷离已经在通道稳定 com/flutter/flutter.git“ rel =“ nofollow noreferrer”> https://github.com/flutter/flutter.git.git

框架•修订CD41FDD（10天前）•20222222222222年-06-08 09：52：13 -0700

引擎•修订版F15F824B57 工具•飞镖2.17.3•DevTools 2.12.2

以前每个人都可以正常工作，但我遇到了这个错误：

I/flutter ( 6677): `camera_android` threw an error: Binding has not yet been initialized.
I/flutter ( 6677): The "instance" getter on the ServicesBinding binding mixin is only available once that binding has been initialized.
I/flutter ( 6677): Typically, this is done by calling "WidgetsFlutterBinding.ensureInitialized()" or "runApp()" (the latter calls the former). Typically this call is done in the "void main()" method. The "ensureInitialized" method is idempotent; calling it multiple times is not harmful. After calling that method, the "instance" getter will return the binding.
I/flutter ( 6677): In a test, one can call "TestWidgetsFlutterBinding.ensureInitialized()" as the first line in the test's "main()" method to initialize the binding.
I/flutter ( 6677): If ServicesBinding is a custom binding mixin, there must also be a custom binding class, like WidgetsFlutterBinding, but that mixes in the selected binding, and that is the class that must be constructed before using the "instance" getter.. The app may not function as expected until you remove this plugin from pubspec.yaml
E/flutter ( 6677): [ERROR:flutter/shell/common/shell.cc(93)] Dart Unhandled Exception: Binding has not yet been initialized.
E/flutter ( 6677): The "instance" getter on the ServicesBinding binding mixin is only available once that binding has been initialized.
E/flutter ( 6677): Typically, this is done by calling "WidgetsFlutterBinding.ensureInitialized()" or "runApp()" (the latter calls the former). Typically this call is done in the "void main()" method. The "ensureInitialized" method is idempotent; calling it multiple times is not harmful. After calling that method, the "instance" getter will return the binding.
E/flutter ( 6677): In a test, one can call "TestWidgetsFlutterBinding.ensureInitialized()" as the first line in the test's "main()" method to initialize the binding.
E/flutter ( 6677): If ServicesBinding is a custom binding mixin, there must also be a custom binding class, like WidgetsFlutterBinding, but that mixes in the selected binding, and that is the class that must be constructed before using the "instance" getter., stack trace: #0      BindingBase.checkInstance.<anonymous closure> (package:flutter/src/foundation/binding.dart:281:9)
E/flutter ( 6677): #1      BindingBase.checkInstance (package:flutter/src/foundation/binding.dart:363:6)
E/flutter ( 6677): #2      ServicesBinding.instance (package:flutter/src/services/binding.dart:48:54)
E/flutter ( 6677): #3      MethodChannel.setMethodCallHandler (package:flutter/src/services/platform_channel.dart:387:51)
E/flutter ( 6677): #4      new AndroidCamera (package:camera_android/src/android_camera.dart:26:13)
E/flutter ( 6677): #5      AndroidCamera.registerWith (package:camera_android/src/android_camera.dart:32:31)
E/flutter ( 6677): #6      _PluginRegistrant.register (file:///Users/manish/Documents/REBORN/flutter/user-app/.dart_tool/flutter_build/dart_plugin_registrant.dart:47:23)
E/flutter ( 6677): 

Answer 1

为我工作

dependency_overrides:
  camera_android: 0.9.7+1
  camera_avfoundation: 0.9.7+1

Answer 2

是的，他们释放了 0.9.8+1 作为破损的构建。

https://github.com/github.com/flutter/flutter/flutter/issues/106236#issuecomment-106236#issuecomment- 1161100481

这是移动到人均平台通道的意外副作用。默认方法通道没有此问题，因为在DART中对静态类字段进行了懒惰的评估，因此，只有在使用摄像机实际使用时，默认方法频道类构造函数才能运行，而新版本的构造函数则在registerwith（）中明确触发（） 。
我们需要在这些实现中使反向频道创建懒惰，而不是在构造函数中进行设置。

建议

在修复构建之前，我建议：

httpps：//github.com/颤动/扑朔迷离/发行/106236＃issuecomment-1161149799

1. delete pubspec.lock.lock
2. 降级到 0.9.7+1 （版本 0.9.8 和 0.9.8+1 投掷错误）
   https://pub.dev/packages/packages/camera/versions
3. 运行 flutter Flutter Pub Get

不建议

其他解决方案是覆盖依赖项

dependency_overrides:
  camera_android: 0.9.7+1
  camera_avfoundation: 0.9.7+1

我不建议这种方法，因为（a）构建已损坏，这是一个可能无法解决所有问题的黑客，（（（ b）这些是其他代码行，它们会减慢您的构建并将其添加到存储库历史记录中，并且（c）您需要记住要删除这些代码行。

Flutter团队也不建议这种方法。他们将覆盖代码称为“反模式” ...
https://github.com/github.com/github.com/flutter/flutter/flutter/flutter/106236#issuecomment/106236#issuecomment/106236#issuecomment- 1162916231
https://github.com/github.com/github.com/flutter/flutter/flutter/flutter/106236#issuecomment/106236#issuecomment/106236#issuecomment- 1162941742

Answer 3

这不是答案，但是这种解决方法对我有帮助（在Pubspec.yaml中）：

dependency_overrides:
  camera: <=0.9.7

Answer 4

然后将其添加到您的pubspec.yaml文件中

 dependency_overrides:
      camera_android: 0.9.7+1
      camera_avfoundation: 0.9.7+1

，然后在您的终端运行中：

flutter clean 

flutter pub get

flutter run

请注意，您会在终端中看到一些与此替代有关的警告，但现在可以忽略它们。

您可以参考此问题，您可以在