OkHttpClient 上传文件

OkHttpClient okHttpClient=new OkHttpClient();MediaType parse = MediaType.parse("text/x-markdown;charset=utf-8");File file = new File(Environment.getExternalStorageDirectory(),"note01.md");Request builder=new Request.Builder()        .post(RequestBody.create(parse,file))        .url("https://api.github.com/markdown/raw")        .build();Call call = okHttpClient.newCall(builder);call.enqueue(new Callback() {    @Override    public void onFailure(Call call, IOException e) {    }    @Override    public void onResponse(Call call, Response response) throws IOException {        Log.d("=======1111",response.body().string());    }});