okHttp+protobuf实现okhttp post二进制流至服务器

//上次上传的有些错误，这次亲测是正确的，本人目前也在学习protobuf，有什么问题可以评论 互相讨论

public void okHttpPost(String url) throws IOException {
        Integer head = 0XFF;
        long playerId = 0;
        long sessionId=0;
        int commandId = CommandMessage.CommandEnum.CMD_GET_DICT_INFOS.getNumber() ;
        //我测了一个不需要传参数的对象
        ModuleMessage.Empty_Req  player = ModuleMessage.Empty_Req.newBuilder().build();
          
//        AoneProtoMessage.Test_Req.Builder aoneProtoMsg = AoneProtoMessage.Test_Req.newBuilder();
//        aoneProtoMsg.setParam1("").setParam2(commandId);
//        AoneProtoMessage.Test_Req  player= aoneProtoMsg.build();
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        DataOutputStream dos = new DataOutputStream(outputStream);
        //服务器要求需要拼接的字节位
        int size  = 4+player.toByteArray().length;
        dos.writeInt(head);
        dos.writeLong(playerId);
        dos.writeLong(sessionId);
        dos.writeInt(size);
        dos.writeInt(commandId);
        //dos.write(player.toByteArray());
        player.writeTo(dos);
        text.setText(Arrays.toString(outputStream.toByteArray()));
        OkHttpClient client = new OkHttpClient();
        client.newBuilder().connectTimeout(5, TimeUnit.SECONDS);
        client.newBuilder().readTimeout(5, TimeUnit.SECONDS);
        client.newBuilder().writeTimeout(5, TimeUnit.SECONDS);
        final RequestBody requestBody = RequestBody.create(MediaType.parse("application/octet-stream"),outputStream.toByteArray());

        final Request request = new Request.Builder().url(url).post(requestBody).build();
        client.newCall(request).enqueue(new Callback() {
            @Override
                public void onFailure(Call call, IOException e) {

                Log.e(">>>>>>>>>>","onFailure"+e.toString());
            }
            @Override
            public void onResponse(Call call, Response response) throws IOException {
                byte a[] = response.body().bytes();
                byte b[] = new byte[a.length-12];
                //这里也是服务器返回前面字节数组所占的用于验证的字符 我们服务器是要截去前12位 保留12位以后为有效data
                System.arraycopy(a,12,b,0,a.length-12);
                Log.e(">>>>>>>>>>","onResponse"+Arrays.toString(a));
             
//                //AoneProtoMessage.Test_Req  req= AoneProtoMessage.Test_Req.parseFrom(dis);
                try{
                    //反序列化（亲测有效）
                    AoneProtoMessage.GetDictInfo_Rsp rsp = AoneProtoMessage.GetDictInfo_Rsp.parseFrom(b);

                    Map map = rsp.getCategoryDict();

                    Log.e(">>>","Count:"+rsp.getCategoryDictCount()+"/r/n" +
                            "AllMap"+ map.toString());
                }catch (InvalidProtocolBufferException e){
                    e.printStackTrace();
                }

            }
        });

    }