我已经谷歌搜索,我找到的解决方案正在使用
path_provider
,在 AndroidManifest.xml
中添加权限,是的,我已经尝试过。但我的仍然有错误。
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/${DateTime.now()}.jpg';
try {
await _cameraController.takePicture(filePath);
} catch (e) {
return null;
}
return File(filePath);
}
这是我的
AndroidManifest.xml
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
...
android:requestLegacyExternalStorage="true">
...
</application>
这充满了日志。
E/flutter (14879): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: FileSystemException: Creation failed, path = 'Directory: '' (OS Error: Read-only file system, errno = 30)
E/flutter (14879): #0 _Directory.create.<anonymous closure> (dart:io/directory_impl.dart:117:11)
E/flutter (14879): #1 _rootRunUnary (dart:async/zone.dart:1198:47)
E/flutter (14879): #2 _CustomZone.runUnary (dart:async/zone.dart:1100:19)
E/flutter (14879): #3 _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
E/flutter (14879): #4 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
E/flutter (14879): #5 Future._propagateToListeners (dart:async/future_impl.dart:725:32)
E/flutter (14879): #6 Future._completeWithValue (dart:async/future_impl.dart:529:5)
E/flutter (14879): #7 Future._asyncCompleteWithValue.<anonymous closure> (dart:async/future_impl.dart:567:7)
E/flutter (14879): #8 _rootRun (dart:async/zone.dart:1190:13)
E/flutter (14879): #9 _CustomZone.run (dart:async/zone.dart:1093:19)
E/flutter (14879): #10 _CustomZone.runGuarded (dart:async/zone.dart:997:7)
E/flutter (14879): #11 _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:1037:23)
E/flutter (14879): #12 _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
E/flutter (14879): #13 _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
需要修改目录路径。
更改代码即可
来自
String directoryPath = '$root/bozzetto_camera';
到
String directoryPath = root.path + '/bozzetto_camera';
发生异常的原因是您将目录而不是路径分配给名为“directoryPath”且标签为“root”的变量。在这种情况下,“root”代表目录,而不是路径。因此,您应该获取路径而不是目录。请参阅下面的示例以进行说明。
字符串目录路径 = '$root/bozzetto_camera';
到
String DirectoryPath='${root.path}/bossetto_camera';