retrofit_snippet_3

package com.example.retrofitsimple;

import android.annotation.SuppressLint;

import java.util.concurrent.TimeUnit;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import okhttp3.OkHttpClient;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;

public class APIClient {

    public static final String BASE_URL = "https://jsonplaceholder.typicode.com/";
    private static Retrofit retrofit = null;


    public static Retrofit getClient() {
        if (retrofit == null) {
            retrofit = new Retrofit.Builder()
                    .baseUrl(BASE_URL)
                    .client(getUnsafeOkHttpClient())
                    .addConverterFactory(GsonConverterFactory.create())
                    .build();
        }
        return retrofit;
    }


    private static OkHttpClient getUnsafeOkHttpClient() {
        try {
            // Create a trust manager that does not validate certificate chains
            final TrustManager[] trustAllCerts = new TrustManager[]{
                    new X509TrustManager() {
                        @SuppressLint("TrustAllX509TrustManager")
                        @Override
                        public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) {
                        }

                        @SuppressLint("TrustAllX509TrustManager")
                        @Override
                        public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) {
                        }

                        @Override
                        public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                            return new java.security.cert.X509Certificate[]{};
                        }
                    }
            };


            final SSLContext sslContext = SSLContext.getInstance("SSL");
            sslContext.init(null, trustAllCerts, new java.security.SecureRandom());


            final SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();

            OkHttpClient.Builder builder = new OkHttpClient.Builder();
            builder.sslSocketFactory(sslSocketFactory);
            builder.connectTimeout(10, TimeUnit.SECONDS);
            builder.readTimeout(10, TimeUnit.SECONDS);
            builder.writeTimeout(10, TimeUnit.SECONDS);
            HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
            interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
            builder.addInterceptor(interceptor);
            builder.hostnameVerifier(new HostnameVerifier() {
                @Override
                public boolean verify(String hostname, SSLSession session) {
                    return true;
                }
            });
            return builder.build();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}