Retrofit 2.0 上傳文件

1.用MultipartBody.Part的方式上傳文件（單文件上傳）（表單方式）

 @Multipart
  @POST("xxx/xxx")
  Call<ResponseBody> upload(@Part MultipartBody.Part part);

 

其中的「photos」是與服務器端預約的文件參數名

 

2.用RequestBody的方式上傳文件（表單方式，可多上傳）

 /**
     * 多張圖片上傳
     */
    private void initUpateBitmap2() {

        //獲取圖片路徑,這只是個簡單的例子，項目開發中會有不少圖片須要上傳，通常從相冊和相機裏獲取，而且保存到後臺服務器時必須本身定義名字
        // ，這樣就不會發生圖片替換（緣由名字重複）
        File file = new File(Environment.getExternalStorageDirectory() + "/" + "retrofit/" + "ceshi.jpg");
        File file2 = new File(Environment.getExternalStorageDirectory() + "/" + "retrofit/" + "ceshi2.jpg");
        File file3 = new File(Environment.getExternalStorageDirectory() + "/" + "retrofit/" + "ceshi3.jpg");
        File file4 = new File(Environment.getExternalStorageDirectory() + "/" + "retrofit/" + "ceshi4.jpg");

        RequestBody requestBody = RequestBody.create(MediaType.parse("multipart/form-data"), file);
        RequestBody requestBody2 = RequestBody.create(MediaType.parse("multipart/form-data"), file2);
        RequestBody requestBody3 = RequestBody.create(MediaType.parse("multipart/form-data"), file3);
        RequestBody requestBody4 = RequestBody.create(MediaType.parse("multipart/form-data"), file4);
        RequestBody body = RequestBody.create(MediaType.parse("multipart/form-data"), file);
        //傳一張圖片就要增長一個參數
        String name = "photo\"; filename=\"ceshi.jpg\"";
        String name2 = "photo\"; filename=\"ceshi2.jpg\"";
        String name3 = "photo\"; filename=\"ceshi3.jpg\"";
        String name4 = "photo\"; filename=\"ceshi4.jpg\"";
        HashMap<String, RequestBody> map = new HashMap<>();
        map.put(name, requestBody);
        map.put(name2, requestBody2);
        map.put(name3, requestBody3);
        map.put(name4, requestBody4);

        RetrofitHelper.getInstance().uploadFile2(map, new RetrofitHelper.OnSuccessListener() {
            @Override
            public void onSuccess(Object o) {
                Log.e("", "成功");
            }

            @Override
            public void onFaile() {
                Log.e("", "失敗");

            }
        });
    }