OkHttp json rpc 查询ETH余额

                        JsonObject object = new JsonObject();
                        JsonArray jsonArray = new JsonArray();
                        jsonArray.add("0x69987bfE7D7aC505ca65D312f8Ca11591E77c41d");
                        jsonArray.add("latest");
                         object.addProperty("jsonrpc","2.0");
                         object.addProperty("method","eth_getBalance");
                         object.add("params",jsonArray);
                         object.addProperty("id",1);
                    RequestBody body = RequestBody.create(JSON, object.toString());
                    HttpMethods.getInstance().getHttpService().getBlance(body)
                            .compose(RxHelper.io_main())
                            .subscribeWith(new BaseSubscriber2<>());

     @POST(MAIN_URL)
    Flowable<Object> getBlance(@Body RequestBody body);

public OkHttpClient getOkHttpClient2() {
        OkHttpClient.Builder httpClientBuilder = new OkHttpClient.Builder();
        OkHttpUtil.setHttpConfig(httpClientBuilder);
        if (BuildConfig.DEBUG) {
            //设置log拦截器
            httpClientBuilder.addInterceptor(OkHttpUtil.getInterceptor(0));
        }
        httpClientBuilder.authenticator(new Authenticator() {
            @Override
            public Request authenticate(Route route, okhttp3.Response response) throws IOException {
                if (responseCount(response) >= 3) {
                    return null;
                }
                String credential = Credentials.basic("admin", "admin");
                return response.request().newBuilder().header("Authorization", credential).build();
            }
        });
        return httpClientBuilder.build();
    }
 
  public static int responseCount(okhttp3.Response response) {
        int result = 1;
        while ((response = response.priorResponse()) != null) {
            result++;
        }
        return result;
    }