Android Retrofit本地文件上传

参考Retrofit基础上传 
第一MainActivity类
Retrofit retrofitUpload;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ButterKnife.bind(this);


     retrofitUpload = new Retrofit.Builder()
            .baseUrl("http://192.168.1.8:8080/UploadFile/")
            .addConverterFactory(GsonConverterFactory.create())
            .build();


}

@OnClick(R.id.buton_bu)
public void onViewClicked() {
    file_img();
}
//文件上传
//单文件上传携带参数(使用注解@Multipart和@Part)，需要在手机SD卡目录下的Pictures文件夹下添加img.png图片
private void file_img(){
    APIWrapper service = retrofitUpload.create(APIWrapper.class);
    File file = new File(Environment.getExternalStorageDirectory() + "/Pictures", "img.png");
    //设置Content-Type:application/octet-stream
    RequestBody photoRequestBody = RequestBody.create(MediaType.parse("application/octet-stream"), file);
    //设置Content-Disposition:form-data; name="photo"; filename="xuezhiqian.png"
    MultipartBody.Part photo = MultipartBody.Part.createFormData("photo", file.getName(), photoRequestBody);
    //添加参数用户名和密码，并且是文本类型
    RequestBody userName = RequestBody.create(MediaType.parse("text/plain"), "nba");
    RequestBody passWord = RequestBody.create(MediaType.parse("text/plain"), "666");
    Call<User> loadCall = service.postImgApi(photo, userName, passWord);
    loadCall.enqueue(new Callback<User>() {
        @Override
        public void onResponse(Call<User> call, Response<User> response) {
            Log.e("APP", response.body().getImgUri());
        }

        @Override
        public void onFailure(Call<User> call, Throwable t) {
            t.printStackTrace();
        }
    });
}

第二  APIWrapper类

public interface APIWrapper {
    @Multipart
    @POST("/file/img")
    //文件上传使用MultipartBody.Part对象
    Call<User> postImgApi(@Part MultipartBody.Part photo, @Part("username") RequestBody username, @Part("password") RequestBody password);
}

第三User

public class User {

    private String ImgUri;
    private String TextFile;

    public User() {

    }
    public String getTextFile() {
        return TextFile;
    }

    public void setTextFile(String textFile) {
        TextFile = textFile;
    }

    public String getImgUri() {
        return ImgUri;
    }

    public void setImgUri(String ImgUriUri) {
        this.ImgUri = ImgUriUri;
    }


}