ApiUtil

public class ApiUtil {

    public final static String BASE_URL = "";
    
    private static Retrofit retrofit = null;
    public static OkHttpClient getOkHttpClient() {
        HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
        return new OkHttpClient.Builder()
                .addInterceptor(interceptor)
                .connectTimeout(100, TimeUnit.SECONDS)
                .readTimeout(100, TimeUnit.SECONDS)
                .writeTimeout(100, TimeUnit.SECONDS)
                .build();
    }

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





//Add these to you app build.gradle
implementation 'com.squareup.retrofit2:retrofit:2.5.0'
implementation 'com.squareup.okhttp3:logging-interceptor:3.9.0'
implementation 'org.apache.httpcomponents:httpclient-android:4.3.5'
implementation 'com.squareup.retrofit2:converter-gson:2.2.0'