Unsupported operation: Android, Retrofit, OkHttp. Adding interceptor in OkHttpClient

This issue occurs when you change Retrofit 2.0-beta2 to Retrofit 2.0-beta3. You have to use builder if you want to create OkHttpClient object.

Change :

 OkHttpClient okClient = new OkHttpClient(); okClient.interceptors().add(new Interceptor() {       @Override       public Response intercept(Interceptor.Chain chain) throws IOException {            Request original = chain.request();            // Request customization: add request headers            Request.Builder requestBuilder = original.newBuilder()                    .header("Authorization", token)                    .method(original.method(), original.body());            Request request = requestBuilder.build();            return chain.proceed(request);        } });

to :

 OkHttpClient okClient = new OkHttpClient.Builder()           .addInterceptor(               new Interceptor() {                 @Override                 public Response intercept(Interceptor.Chain chain) throws IOException {                       Request original = chain.request();                       // Request customization: add request headers                       Request.Builder requestBuilder = original.newBuilder()                               .header("Authorization", token)                               .method(original.method(), original.body());                       Request request = requestBuilder.build();                       return chain.proceed(request);                   }               })           .build();

It should resolve your problem.

Try this if the other answer doesn't work:

OkHttpClient okHttpClient = new OkHttpClient.Builder()    .addInterceptor(new MyInterceptor())    .build();retrofit = new Retrofit.Builder()    .baseUrl("http://google.com")    .addConverterFactory(GsonConverterFactory.create())    .client(okHttpClient)    .build();

You Can Add In this way also.

HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).build(); Retrofit retrofit = new Retrofit.Builder()            .baseUrl("ENDPOINT_URL")            .addConverterFactory(GsonConverterFactory.create()).client(client)            .build();