添加多张图片上传解决办法

netrain_flutter_app/lib/douwen/custom/http/base/IService.dart

@@ -39,6 +39,7 @@ mixin IService {
         _analysisApiException(iEntity);
       }else{
         iEntity = new IEntity(code: HttpCode.NORMAL_ERROR,msg:e.toString());
+
       }
     }
     return iEntity;

netrain_flutter_app/lib/zhangfeng/LoginApi.dart

 import 'Network/HttpManager.dart';
-import 'Network/BaseHttpModel.dart';
 import 'UserModel.dart';
 
 /// 所有接口类
@@ -17,8 +16,8 @@ class LoginApi {
   }
 
   ///上传头像
-  static uploadAvatarRequest(String avatarPath, OnResult onResult) {
-    return HttpManager.getInstance().request('file/upload', parameters: null,method: "POST", imagePath: avatarPath,onResult: (data,errorMsg){
+  static uploadAvatarRequest(List images, OnResult onResult) {
+    return HttpManager.getInstance().request('file/upload', parameters: null,method: "POST", images: images,onResult: (data,errorMsg){
       if(onResult != null){
         onResult(data, errorMsg);
       }

netrain_flutter_app/lib/zhangfeng/LoginPage.dart

@@ -20,7 +20,8 @@ class _LoginState extends State<LoginRequestPage> {
   // This widget is the root of your application.
   final phoneTextField = TextEditingController();
   final pwdTextField = TextEditingController();
-  PickedFile _image;
+  PickedFile _image1;
+  PickedFile _image2;
 
   @override
   void dispose() {
@@ -56,19 +57,29 @@ class _LoginState extends State<LoginRequestPage> {
     Fluttertoast.showToast(msg:'退出成功');
   }
 
-  Future getImage() async {
+  void _getImage(int type) async {
     if(UserModel.getModel() == null){
       Fluttertoast.showToast(msg:'请登录');
       return;
     }
     var image = await ImagePicker.platform.pickImage(source: ImageSource.gallery);
-    _upLoadImage(image);//上传图片
     setState(() {
-      _image = image;
+      if(type == 0){
+        _image1 = image;
+      }else {
+        _image2 = image;
+      }
     });
   }
-  _upLoadImage(PickedFile image) async {
-    LoginApi.uploadAvatarRequest(image.path, (httpModel, error){
+  _upLoadImage() {
+    List images = new List();
+    if(_image1 != null){
+      images.add(_image1.path);
+    }
+    if(_image2 != null){
+      images.add(_image2.path);
+    }
+    LoginApi.uploadAvatarRequest(images, (httpModel, error){
       if(error != null){
         Fluttertoast.showToast(msg: error);
       }else{
@@ -76,9 +87,10 @@ class _LoginState extends State<LoginRequestPage> {
       }
     });
   }
+
   void _requestListData() {
-     if(UserModel.getModel() == null){
-       Fluttertoast.showToast(msg:'请登录');
+    if (UserModel.getModel() == null) {
+      Fluttertoast.showToast(msg: '请登录');
       return;
     }
     Map<String, String> map = new Map<String, String>();
@@ -87,16 +99,18 @@ class _LoginState extends State<LoginRequestPage> {
       if (error != null) {
         Fluttertoast.showToast(msg: error);
       } else {
-        List examList = httpModel.data["content"].map((m) => new ExamListModel.fromJson(m)).toList();
-        if(examList.length > 0){
+        List examList = httpModel.data["content"]
+            .map((m) => new ExamListModel.fromJson(m))
+            .toList();
+        if (examList.length > 0) {
           ExamListModel model = examList[0];
-          Fluttertoast.showToast(msg: model.toJson().toString(),timeInSecForIos:5);
+          Fluttertoast.showToast(
+              msg: model.toJson().toString(), timeInSecForIos: 5);
         }
       }
     });
   }
 
-
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -159,22 +173,38 @@ class _LoginState extends State<LoginRequestPage> {
             ),
             Container(
               margin: EdgeInsets.only(top: 50),
-              width: 100,
+              width: 300,
               height: 100,
-              child: ElevatedButton(
-                child: Text("上传头像"),
-                onPressed: getImage,
+              child: Row(
+                mainAxisAlignment: MainAxisAlignment.start,
+                children: [
+                  GestureDetector(
+                    child: Image.asset(_image1 != null ? _image1.path : Images.lake),
+                    onTap: (){
+                      _getImage(0);
+                    },
+                  ),
+                  GestureDetector(
+                    child: Image.asset(_image2 != null ? _image2.path : Images.lake),
+                    onTap: (){
+                      _getImage(1);
+                    },
                   ),
+                ],
+              )
             ),
             Container(
               margin: EdgeInsets.only(top: 0),
-              width: 100,
-              height: 100,
-              child: Image.asset(_image != null ? _image.path : Images.lake),
+              width: 150,
+              height: 50,
+              child: ElevatedButton(
+                child: Text("上传多张图"),
+                onPressed: _upLoadImage,
+              ),
             ),
             Container(
               margin: EdgeInsets.only(top: 10),
-              width: 100,
+              width: 150,
               height: 50,
               child: ElevatedButton(
                 child: Text("请求列表数据"),

netrain_flutter_app/lib/zhangfeng/Network/HttpManager.dart

 import 'dart:convert';
 import 'dart:ffi';
+import 'dart:io';
 import 'package:dio/dio.dart';
 import 'package:netrain_flutter_app/zhangfeng/Network/BaseHttpModel.dart';
 import 'package:netrain_flutter_app/zhangfeng/UserModel.dart';
@@ -78,30 +79,38 @@ class HttpManager {
   request(String url,
       {parameters,
         method = 'GET',
-        OnResult onResult,String imagePath}) async {
+        OnResult onResult,List images}) async {
     parameters = parameters ?? {};
     if(onResult==null){
       return;
     }
     try {
       FormData formdata;
-      if(imagePath != null){
+      if(images != null){
+        List<MultipartFile> imageList = new List<MultipartFile>();
+        for (String imagePath in images) {
           var name = imagePath.substring(imagePath.lastIndexOf("/") + 1, imagePath.length);
           var suffix = name.substring(name.lastIndexOf(".") + 1, name.length);
-        formdata = FormData.fromMap({
-          "file": await MultipartFile.fromFile(
-            imagePath,                                //图片路径
+          MultipartFile multipartFile = await MultipartFile.fromFile(
+            imagePath,
+            //这个字段要有，否则后端接收为null
             filename: name,
-          )
+          );
+          imageList.add(multipartFile);
+        }
+
+        formdata = new FormData.fromMap({
+          //后端要用multipartFiles接收参数，否则为null
+          "multipartFiles" : imageList
         });
       }
       parameters = new Map<String, dynamic>.from(parameters);
-      Map<String,String> map = new Map<String,String>();
+      Map<String,String> headers = new Map<String,String>();
       if(UserModel.getModel() != null) {
-        map[UserModel.getModel().header] = UserModel.getModel().tokenHead + UserModel.getModel().token;
+        headers[UserModel.getModel().header] = UserModel.getModel().tokenHead + UserModel.getModel().token;
       }
       Response response = await _dio.request(url,
-          queryParameters: parameters, data: formdata, options: new Options(method: method,headers: map,responseType: ResponseType.plain));
+          queryParameters: parameters, data: formdata, options: new Options(method: method,headers: headers,responseType: ResponseType.plain));
       Map<String, dynamic> result = json.decode(response.toString());
       BaseHttpModel httpModel = BaseHttpModel.fromJson(result);
       if (httpModel.isSuccess()) {