Flutter 拍照和File上传

定义全局文件变量

  List fileList = new List<File>();

创建拍照按钮

@override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('拍照上传'),
        actions: _appBarActions(),
      ),
      body: Text('拍照上传测试')
      ),
      floatingActionButton: FloatingActionButton(
        tooltip: 'Pick Image',
        onPressed: _getImage,
        child: Icon(Icons.add_a_photo),
        heroTag: "image",
      ),
    );
  }

打开相机

//打开相机
  Future _getImage() async {
    var image = await ImagePicker.pickImage(
    	//调用摄像头，设置像素
        source: ImageSource.camera, maxWidth: 800, maxHeight: 600);
    if (image != null) {
      	fileList.add(image);
    }
  }

上传到服务器使用dio包

  _upload(File image) async {
      String path = image.path;
      var name = path.substring(path.lastIndexOf("/") + 1, path.length);
      var suffix = name.substring(name.lastIndexOf(".") + 1, name.length);

      FormData formData = new FormData.from({
        "file": new UploadFileInfo(image, name,
            contentType: ContentType.parse("image/$suffix"))
      });

	  response = await dio.post("UPLOAD_IMAGE", data: formData);
 		if (response ['success']) {
          FileInformation fileInformation =
          FileInformation.fromJson(response ['object']);
          setState(() {
            fileList.add(fileInformation);
          });
        } else {
          failureTip(context, "错误", response ['message']);
        }
  }