Flutter 颤振：未处理的异常：FileSystemException:创建失败，路径='；目录：''；（操作系统错误：只读文件系统，errno=30）

我已经在谷歌上搜索了，找到的解决方案正在使用

path\u provider

，在

AndroidManifest.xml

中添加权限，是的，我已经尝试过了。但我还是有错误

这是我的职责

  Future<File> _takePicture() async {
    Directory root = await getTemporaryDirectory(); // this is using path_provider
    String directoryPath = '$root/bozzetto_camera';
    await Directory(directoryPath).create(recursive: true); // the error because of this line
    String filePath = '$directoryPath/${DateTime.now()}.jpg';
    try {
      await _cameraController.takePicture(filePath);
    } catch (e) {
      return null;
    }
    return File(filePath);
  }

这里面全是日志

E/flutter (14879): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: FileSystemException: Creation failed, path = 'Directory: '' (OS Error: Read-only file system, errno = 30)
E/flutter (14879): #0      _Directory.create.<anonymous closure> (dart:io/directory_impl.dart:117:11)
E/flutter (14879): #1      _rootRunUnary (dart:async/zone.dart:1198:47)
E/flutter (14879): #2      _CustomZone.runUnary (dart:async/zone.dart:1100:19)
E/flutter (14879): #3      _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
E/flutter (14879): #4      Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
E/flutter (14879): #5      Future._propagateToListeners (dart:async/future_impl.dart:725:32)
E/flutter (14879): #6      Future._completeWithValue (dart:async/future_impl.dart:529:5)
E/flutter (14879): #7      Future._asyncCompleteWithValue.<anonymous closure> (dart:async/future_impl.dart:567:7)
E/flutter (14879): #8      _rootRun (dart:async/zone.dart:1190:13)
E/flutter (14879): #9      _CustomZone.run (dart:async/zone.dart:1093:19)
E/flutter (14879): #10     _CustomZone.runGuarded (dart:async/zone.dart:997:7)
E/flutter (14879): #11     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:1037:23)
E/flutter (14879): #12     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
E/flutter (14879): #13     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)

E/flatter（14879）：[错误：flatter/lib/ui/ui\u dart\u state.cc（177）]未处理的异常：FileSystemException:创建失败，路径='目录：“”（操作系统错误：只读文件系统，错误号=30）
E/flatter（14879）：#0 _Directory.create。（dart:io/目录执行dart:117:11）
E/flatter（14879）：#1 rootrunary（dart:async/zone.dart:1198:47）
E/flatter（14879）：#2 _CustomZone.runUnary（dart:async/zone.dart:1100:19）
E/flatter（14879）：#3 FutureListener.handleValue（dart:async/future_impl.dart:143:18）
E/flatter（14879）：#4 Future._-propagateToListeners.handleValueCallback（dart:async/Future_-impl.dart:696:45）
E/flatter（14879）：#5未来。"传播给监听器（dart:async/Future\u impl.dart:725:32）
E/flatter（14879）：#6 Future._completewith value（dart:async/Future_impl.dart:529:5）
E/颤振（14879）：#7未来。"用价值完成。（dart:async/future\u impl.dart:567:7）
E/flatter（14879）：#8 rootRun（dart:async/zone.dart:1190:13）
E/flatter（14879）：#9_CustomZone.run（dart:async/zone.dart:1093:19）
E/颤振（14879）：#10 _CustomZone.runguard（dart:async/zone.dart:997:7）
E/颤振（14879）：#11_CustomZone.bindCallbackguared。（dart:async/zone.dart:1037:23）
E/flatter（14879）：#12 microtaskLoop（dart:async/schedule_microtask.dart:41:21）
E/flatter（14879）：#13 startMicrotaskLoop（dart:async/schedule_microtask.dart:50:5）

您需要修改目录路径

只需更改代码

从

String directoryPath='$root/bozzetto_camera'；

到

String directoryPath=root.path+'/bozzetto_-camera'；

E/flutter (14879): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: FileSystemException: Creation failed, path = 'Directory: '' (OS Error: Read-only file system, errno = 30)
E/flutter (14879): #0      _Directory.create.<anonymous closure> (dart:io/directory_impl.dart:117:11)
E/flutter (14879): #1      _rootRunUnary (dart:async/zone.dart:1198:47)
E/flutter (14879): #2      _CustomZone.runUnary (dart:async/zone.dart:1100:19)
E/flutter (14879): #3      _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
E/flutter (14879): #4      Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
E/flutter (14879): #5      Future._propagateToListeners (dart:async/future_impl.dart:725:32)
E/flutter (14879): #6      Future._completeWithValue (dart:async/future_impl.dart:529:5)
E/flutter (14879): #7      Future._asyncCompleteWithValue.<anonymous closure> (dart:async/future_impl.dart:567:7)
E/flutter (14879): #8      _rootRun (dart:async/zone.dart:1190:13)
E/flutter (14879): #9      _CustomZone.run (dart:async/zone.dart:1093:19)
E/flutter (14879): #10     _CustomZone.runGuarded (dart:async/zone.dart:997:7)
E/flutter (14879): #11     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:1037:23)
E/flutter (14879): #12     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
E/flutter (14879): #13     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)