flutter 上传照片，已及上传阿里云；

调用相机；

void _getImage() async {try {var image = await ImagePicker.pickImage(source: ImageSource.gallery, maxWidth: 800);print(image);  uploadImage(image.path, '0', onSuccess: (data) {if (data != null) {setState(() {_info = data??'';});}});} catch (e) {Toast.show("没有权限，无法打开相册", duration: 1000);}}

上传阿里云前端直传；

///上传图片Future uploadImage(String imagePath, String vin,{Function(String reslut) onSuccess}) async {String name = DateTime.now().millisecondsSinceEpoch.toString() +imagePath.substring(imagePath.lastIndexOf("."));await DioUtil.instance.requestEntityNetwork(Method.get, "${HttpApi.OSS_CAR_SIGNATURE}/$vin",onSuccess: (data) async { //这个是去拿上传参数，包括地址签名等FormData formData = FormData.from({'key': data['dir'] + name,'policy': data['policy'],'OSSAccessKeyId': data['accessid'],'success_action_status': 200,'Signature': data['signature'],'Filename': name,'file': UploadFileInfo(File(imagePath), name)});Dio dio = Dio();dio.options.responseType = ResponseType.plain;try {Response response = await dio.post(data['host'], data: formData);String imageUrl = data['host'] + '/' + data['dir'] + name;if (response.statusCode == 200) {if (onSuccess != null) {onSuccess(imageUrl);}}} on DioError catch (e) {Toast.show(e.message);}}, onError: (data) {Toast.show("获取签名信息失败");});