上传base64格式的图像和压缩后的图像,然后再将其发送到服务器?

我已经上传图像与改装,我从教程在互联网上遵循。

学术客户。班

@Multipart
    @POST("/")
    Call<ResponseBody> postImage(@Part MultipartBody.Part image, @Part("name")RequestBody name);

File file = new File(filePath);
RequestBody reqFile = RequestBody.create(MediaType.parse("image/*"),file);
        MultipartBody.Part body = MultipartBody.Part.createFormData("upload",file.getName(),reqFile);
        RequestBody name = RequestBody.create(MediaType.parse("text/plain"),"upload_test");

        Log.d("xxxxxxx",body + " ---- "+ name);

        AcademicClient client = ServiceGenerator.createService(AcademicClient.class);
        Call<ResponseBody> call = client.postImage(body,name);
        call.enqueue(new Callback<ResponseBody>() {
            @Override
            public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {

            }

            @Override
            public void onFailure(Call<ResponseBody> call, Throwable t) {

            }
        });

如何将其转换为Base64并首先压缩图像,然后再将其发送到改造中的服务器?