Android Retrofit2.1.0直接发送Json字符串

可以用@body注解（将数据添加到requestbody中）、设置retrofit requestbody的编码格式为json

一、接口类

public interface IHttpService {    /**     *      * @param params     * @return     */    @POST("ad/getAds.do")    Call<Ads> getAds(@Body Map<String, Object>params);}
二、retrofit配置
public class RetrofitHttPRequest {    /**     * 超时时间60s     */    private static final long DEFAULT_TIMEOUT = 60;    private volatile static RetrofitHttpRequest mInstance;    public Retrofit mRetrofit;    public IHttpService mHttpService;    private RetrofitHttpRequest() {        mRetrofit = new Retrofit.Builder()                .baseUrl(UrlConfig.ROOT_URL)                .client(genericClient())                .addConverterFactory(GsonConverterFactory.create())                .build();        mHttpService = mRetrofit.create(IHttpService.class);    }    public static RetrofitHttpRequest getInstance() {        if (mInstance == null) {            synchronized (RetrofitHttpRequest.class) {                if (mInstance == null)                    mInstance = new RetrofitHttpRequest();            }        }        return mInstance;    }    /**     * 添加统一header,超时时间,http日志打印     * body采用UTF-8编码     *     * @return     */    public static OkHttpClient genericClient() {        HttpLoggingInterceptor logging = new HttpLoggingInterceptor();        logging.setLevel(HttpLoggingInterceptor.Level.BODY);        OkHttpClient httpClient = new OkHttpClient.Builder()                .addInterceptor(new Interceptor() {                    @Override                    public okhttp3.Response intercept(Chain chain) throws IOException {                        Request request = chain.request();                        Request.Builder requestBuilder = request.newBuilder();                        request = requestBuilder                                .addHeader("Content-Type", "application/json;charset=UTF-8")                                   .post(RequestBody.create(MediaType.parse("application/json;charset=UTF-8"),                                        bodyToString(request.body())))//关键部分，设置requestBody的编码格式为json                                .build();                        return chain.proceed(request);                    }                })                .addInterceptor(logging)                .connectTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)                .writeTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)                .readTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)                .build();        return httpClient;    }    /**     * 将call加入队列并实现回调     *     * @param call             调入的call     * @param retrofitCallBack 回调     * @param method           调用方法标志，回调用     * @param <T>              泛型参数     */    public static <T> void addToEnqueue(Call<T> call, final RetrofitCallBack retrofitCallBack, final int method) {        final Context context = MyApplication.getContext();        call.enqueue(new Callback<T>() {            @Override            public void onResponse(Call<T> call, Response<T> response) {                LogUtil.d("retrofit back code ====" + response.code());                if (null != response.body()) {                    if (response.code() == 200) {                        LogUtil.d("retrofit back body ====" + new Gson().toJson(response.body()));                        retrofitCallBack.onResponse(response, method);                    } else {                        LogUtil.d("toEnqueue, onResponse Fail:" + response.code());                        ToastUtil.makeShortText(context, "网络连接错误" + response.code());                        retrofitCallBack.onFailure(response, method);                    }                } else {                    LogUtil.d("toEnqueue, onResponse Fail m:" + response.message());                    ToastUtil.makeShortText(context, "网络连接错误" + response.message());                    retrofitCallBack.onFailure(response, method);                }            }            @Override            public void onFailure(Call<T> call, Throwable t) {                LogUtil.d("toEnqueue, onResponse Fail unKnown:" + t.getMessage());                t.printStackTrace();                ToastUtil.makeShortText(context, "网络连接错误" + t.getMessage());                retrofitCallBack.onFailure(null, method);            }        });    }    private static String bodyToString(final RequestBody request) {        try {            final RequestBody copy = request;            final Buffer buffer = new Buffer();            if (copy != null)                copy.writeTo(buffer);            else                return "";            return buffer.readUtf8();        } catch (final IOException e) {            return "did not work";        }    }
三、使用
private void getAds(){        showWaitDialog();        Map<String, Object> signMap = new HashMap<String, Object>();        signMap.put("channelId", "洪海亮");        signMap.put("position", 1);        signMap.put("status", "1");        Map<String, Map<String, Object>> reqMap = SignUtil.jsonmd5(signMap);        RetrofitHttpRequest.addToEnqueue(RetrofitHttpRequest.getInstance().mHttpService.getAds(reqMap.get("req")),                this, HttpStaticApi.HTTP_GETADS);    }请求json串为
D/OkHttp: --> POST http://xxx/ad/getAds.do http/1.1D/OkHttp: Content-Type: application/json;charset=UTF-8D/OkHttp: Content-Length: 106D/OkHttp: {"reqData":{"position":1,"status":"1","channelId":"洪海亮"},"token":"e75ec317dc97138af6b20caf614ecc7c"}D/OkHttp: --> END POST (106-byte body)