Flutter image_picker 不适用于 PlatformException答案

【问题标题】：Flutter image_picker is not working with PlatformExceptionFlutter image_picker 不适用于 PlatformException
【发布时间】：2019-08-15 15:29:33
【问题描述】：

我正在使用 image_picker: ^0.6.1+2 并且在单击按钮时我正在调用 getImage() 函数：

File _image;

Future getImage() async {
var image = await ImagePicker.pickImage(source: ImageSource.camera);

setState(() {
  _image = image;
});
}

当我单击按钮时，我总是收到此错误。

E/flutter (17542): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: PlatformException(error, Attempt to invoke virtual method 'android.content.res.XmlResourceParser android.content.pm.ProviderInfo.loadXmlMetaData(android.content.pm.PackageManager, java.lang.String)' on a null object reference, null)
E/flutter (17542): #0      StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:564:7)
E/flutter (17542): #1      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:316:33)
E/flutter (17542): <asynchronous suspension>
E/flutter (17542): #2      ImagePicker.pickImage (package:image_picker/image_picker.dart:59:40)
E/flutter (17542): <asynchronous suspension>
E/flutter (17542): #3      _GetLocationPageState.getImage (package:baladity/formulaire_reclamation.dart:102:35)
E/flutter (17542): <asynchronous suspension>
E/flutter (17542): #4      _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:635:14)
E/flutter (17542): #5      _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:711:32)
E/flutter (17542): #6      GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24)
E/flutter (17542): #7      TapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:365:11)
E/flutter (17542): #8      TapGestureRecognizer.acceptGesture (package:flutter/src/gestures/tap.dart:312:7)
E/flutter (17542): #9      GestureArenaManager.sweep (package:flutter/src/gestures/arena.dart:156:27)
E/flutter (17542): #10     _WidgetsFlutterBinding&BindingBase&GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:222:20)
E/flutter (17542): #11     _WidgetsFlutterBinding&BindingBase&GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:198:22)
E/flutter (17542): #12     _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:156:7)
E/flutter (17542): #13     _WidgetsFlutterBinding&BindingBase&GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:102:7)
E/flutter (17542): #14     _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7)
E/flutter (17542): #15     _rootRunUnary (dart:async/zone.dart:1136:13)
E/flutter (17542): #16     _CustomZone.runUnary (dart:async/zone.dart:1029:19)
E/flutter (17542): #17     _CustomZone.runUnaryGuarded (dart:async/zone.dart:931:7)
E/flutter (17542): #18     _invoke1 (dart:ui/hooks.dart:250:10)
E/flutter (17542): #19     _dispatchPointerDataPacket (dart:ui/hooks.dart:159:5)

谢谢，

【问题讨论】：

你必须清理你的应用缓存然后重新安装它或用 try catch 块包装代码并调试它
上周我也遇到了同样的问题，无效缓存和重新启动在 Android Studio 上对我不起作用，所以我只是使用 flutter create project_name 创建了新项目，然后复制了 pubspec.yaml和 lib 目录到新目录，然后运行 flutter pub get，它已通过问题修复，现在我正在使用 image_picker 小部件获取相机和图库。
对于使用ImageSource.camera或ImageSource.gallery，您必须在android或iOS中允许Storage Permission。

标签： android image flutter dart

【解决方案1】：

更新 image_picker 插件 flutter clean 为 Flutter 项目生成新的构建文件。这些步骤通常可以解决带有 PlatformException 的 image_picker 上的问题，如 issue thread 中所述。

【讨论】：