retrofit2 interceptor that logs the raw JSON response from API. After that it clones it and returns a sane copy that other classes can consume.

LogJsonInterceptor.java

import android.util.Log;

import com.appandweb.prjtestdrivendev.BuildConfig;
import com.squareup.okhttp.Interceptor;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;
import com.squareup.okhttp.ResponseBody;

import java.io.IOException;

public class LogJsonInterceptor implements Interceptor {
    @Override
    public Response intercept(Interceptor.Chain chain) throws IOException {
        Request request = chain.request();

        Response response = chain.proceed(request);
        String rawJson = response.body().string();

        Log.d(BuildConfig.APPLICATION_ID, String.format("raw JSON response is: %s", rawJson));

        // Re-create the response before returning it because body can be read only once
        return response.newBuilder()
                .body(ResponseBody.create(response.body().contentType(), rawJson)).build();
    }
}