Android okHttp上传单张或多张照片

private static final MediaType MEDIA_TYPE_PNG = MediaType.parse("image/png");

private final OkHttpClient client = new OkHttpClient();

private void uploadImg() {

        // mImgUrls为存放图片的url集合
        MultipartBody.Builder builder = new MultipartBody.Builder().setType(MultipartBody.FORM);
        for (int i = 0; i <mImgUrls.size() ; i++) {
            File f=new File(mImgUrls.get(i));
            if (f!=null) {
                builder.addFormDataPart("img", f.getName(), RequestBody.create(MEDIA_TYPE_PNG, f));
            }
        }

           //添加其它信息
//        builder.addFormDataPart("time",takePicTime);
//        builder.addFormDataPart("mapX", SharedInfoUtils.getLongitude());
//        builder.addFormDataPart("mapY",SharedInfoUtils.getLatitude());
//        builder.addFormDataPart("name",SharedInfoUtils.getUserName());


        MultipartBody requestBody = builder.build();
        //构建请求
        Request request = new Request.Builder()
                .url(Constant.BASE_URL)//地址
                .post(requestBody)//添加请求体
                .build();

        client.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                
                System.out.println("上传失败:e.getLocalizedMessage() = " + e.getLocalizedMessage());
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                
                System.out.println("上传照片成功：response = " + response.body().string());
                ToastCustom.makeText(PictureListActivity.this, "上传成功", Toast.LENGTH_LONG).show();
              

            }
        });

    }