团队开发冲刺日（十一）

　　初次尝试OKHttp，图片传输遇到问题。

　　Android Studio导入OKHttp:

首先点击File---->Project Structure...

　　

如下图所示，选择Dependencies-------->All Dependencies下的+号，选择第一个Library Dependency

 

搜索okhttp，选择com.squareup.okhttp3，点击OK即可，之后等待导入完成。

 

 说明错误代码处：

 handin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //正文信息
                final String note_str = note.getText().toString();
                //标题信息
                final String title_str = title.getText().toString();
                final String[] see_judge={""};

                //根据开关决定笔记是否公开，0为公开，1为不公开
                see.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                    @Override
                    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                        if(isChecked){
                            see_judge[0] = "公开";
                        }
                        else{
                            see_judge[0] = "私有";
                        }
                    }
                });
                //OKHttp
                OkHttpClient client = new OkHttpClient();
                MultipartBody.Builder builder = new MultipartBody.Builder();
                builder.setType(MultipartBody.FORM);
                builder.addFormDataPart("title",title_str);
                builder.addFormDataPart("note",note_str);
                builder.addFormDataPart("see",see_judge[0]);

                int pic_i=0;
                String URL="http://..../Servlet";
                for(HashMap<String,Object>pic:imageItem){
                    Set<String> set=pic.keySet();
                    for(String key:set){
                        if(pic_i==0){
                            pic_i++;
                            continue;
                        }else{
                            File file = new File(pic.get(key));
                            builder.addFormDataPart("picture",file.getName(), RequestBody.create(PNG,file));
                        }
                    }
                }
                RequestBody requestBody = builder.build();
                Request.Builder RequestBuilder = new Request.Builder();
                RequestBuilder.url(URL);
                RequestBuilder.post(requestBody);
                Request request=RequestBuilder.build();
                client.newCall(request).enqueue(new Callback() {
                    @Override
                    public void onFailure(@NotNull Call call, @NotNull IOException e) {
                        call.cancel();
                    }

                    @Override
                    public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
                        call.cancel();
                    }
                });
            }
        });

这是我尝试的OKHttp传输图片+文本参数的方法，图片以文件形式上传，问题在于行39，我存多个图片时使用的是HashMap保存，value值是Object类型的，直接转换成file会出现问题，正在尝试解决问题。