Android Retrofit2 Post请求添加Json类型参数笔记
一.添加Header
1.添加单独Header
对于某个API所需要添加Header时，可以直接在Service接口上添加@Headers注解：
@Headers({"Content-Type: application/json;charset=UTF-8","User-Agent: Retrofit-your-App"})@GET(ConstantsApi.douban_in_theaters)Observable<MovieTheatersModel> requestTheatersMovies(@Query("city")String city,@Query("count")Integer count,@Query("start")Integer start);
2.添加共同Header
如上，我们可以发现，大部分API「”Content-Type: application/json;charset=UTF-8”」都是Header中必须的，那么我们可以直接添加在拦截器中：
new Retrofit.Builder().addConverterFactory(GsonConverterFactory.create()).client(new OkHttpClient.Builder().addInterceptor(new Interceptor() {@Overridepublic Response intercept(Chain chain) throws IOException {Request request = chain.request().newBuilder().addHeader("Content-Type", "application/json;charset=UTF-8").addHeader("header2", "123456").addHeader("header3", "123456").addHeader("header4", "123456").build();return chain.proceed(request);}}).build();
然后你说直接这样每次都add一个匿名的intercept,令人头大的缩进，也太不软件工程了，那就直接封装一个：
public class MyInterceptor implements Interceptor {@Overridepublic Response intercept(Chain chain) throws IOException {Request request = chain.request().newBuilder().addHeader("Content-Type", "application/json;charset=UTF-8").addHeader("header2", "123456").addHeader("header3", "123456").addHeader("header4", "123456").build();return chain.proceed(request);}}
每次请求需要这些header的时候只需要：
HttpLoggingInterceptor httpLoggingInterceptor = new HttpLoggingInterceptor();httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);MyInterceptor myInterceptor = new MyInterceptor();OkHttpClient client = new OkHttpClient().newBuilder().addInterceptor(httpLoggingInterceptor).addInterceptor(myInterceptor).build();//添加自定义InterceptormovieService = new Retrofit.Builder() //配合Retrofit.baseUrl(ConstantsApi.BASE_DOUBAN).addConverterFactory(GsonConverterFactory.create()).addCallAdapterFactory(RxJavaCallAdapterFactory.create()).client(client).build().create(DoubanMovieService.class);
二.添加Json类型Body
假定需求Json格式如下：
{"param1": "111","param2": "222","data": {"param3": "string","param4": "string2"}}
1.创建JsonObject对象
JSONObject root = new JSONObject();JSONObject requestData = new JSONObject();try {requestData.put("param3", "string");requestData.put("param4", "string2");root.put("param1", "111");root.put("param2", "222");root.put("data", requestData);} catch (JSONException e) {e.printStackTrace();}
2.API 接口设置
@POST("api/data?")Observable<PromotionModel> getResult(@Body RequestBody requestBody);
3.联网请求（包含上述1中代码）
JSONObject root = new JSONObject();JSONObject requestData = new JSONObject();try {requestData.put("param3", "string");requestData.put("param4", "string2");root.put("param1", "111");root.put("param2", "222");root.put("data", requestData);} catch (JSONException e) {e.printStackTrace();}RequestBody requestBody = RequestBody.create(MediaType.parse("application/json"),root.toString());OkHttpClient client = new OkHttpClient.Builder().addInterceptor(new Interceptor()).addInterceptor(logging).build();service = new Retrofit.Builder().client(client).baseUrl(Constants.BASE_URL).addConverterFactory(GsonConverterFactory.create()).addCallAdapterFactory(RxJavaCallAdapterFactory.create()).build().create(Service.class);return service.getResult(requestBody);
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