文件上传（retrofit+rxjava、okhttp）

框架代码就不粘了
1.Retrofit+Rxjava
Utils类关键代码
 
File f1 = new File("/storage/emulated/0/Pictures/c.png");

RequestBody requestFile = RequestBody.create(MediaType.parse("multipart/form-data"), f1);
// MultipartBody.Part 和后端约定好Key，这里的partName是用image
 MultipartBody.Part body = MultipartBody.Part.createFormData("image", f1.getName(), requestFile);
 RequestBody uidBody = RequestBody.create(MediaType.parse("text/plain"), uid);


Api关键代码

@POST(UPLOAD_PATH)
@Multipart
Flowable<Bean> upLoad(@Part("uid") RequestBody uid, @Part MultipartBody.Part file);

2.okhttp

FormBody paramsBody=new FormBody.Builder()
        .add("id","id（参数）").build();

MediaType type=MediaType.parse("application/octet-stream");//"text/xml;charset=utf-8" File file=new File("文件路径");
RequestBody fileBody=RequestBody.create(type,file);

RequestBody multipartBody = new MultipartBody.Builder() .setType(MultipartBody. ALTERNATIVE)

	//一样的效果
        .addPart(Headers.of(
            "Content-Disposition",
            "form-data; name=\"params\"")
                ,paramsBody)
        .addPart(Headers.of(
            "Content-Disposition",
            "form-data; name=\"file\"; filename=\"plans.xml\"")
             ,fileBody)

 Request request= new Request.Builder().url （url) .addHeader( "User-Agent", "android") .header( "Content-Type", "text/html; charset=utf-8;") .post(multipartBody)//传参数、文件或者混合，改一下就行请求体就行 .build();