как создать экземпляр сервиса = builder.build ();Вызов API-интерфейса конечной точки Google Cloud из Android Studio Client

Question

Я слежу за этим облаком Google Обращение к API Backend из клиента Android учебное пособие.

В разделе «Создание объекта службы» он отображает фрагмент кода для включения (я скопировал его в свой файл MainActivity.java)

Tictactoe.Builder builder = new Tictactoe.Builder(
    AndroidHttp.newCompatibleTransport(), new GsonFactory(), null);
service = builder.build();

Но он не объясняет, как создать экземплярсервисный объект (3-я строка).Я потратил несколько часов, пытаясь выяснить это (кажется, связано с com.google.android.gms: play-services: 6.5+)

Кто-нибудь знает, что это за «сервисный» объект, как создать его экземпляр инеобходимые ему зависимости?

MainAcitivity:

package com.example.google_cloud_sql_test;

import android.app.Service;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import com.example.google_cloud_sql_test.echo.Echo;
import com.google.api.client.extensions.android.http.AndroidHttp;
import com.google.api.client.json.gson.GsonFactory;


    public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Echo.Builder builder = new Echo.Builder(
                AndroidHttp.newCompatibleTransport(), new GsonFactory(), null);
        service = builder.build();


    }
}

build.gradle (проект)

// Top-level build file where you can add configuration options common to all sub-projects/modules.

    buildscript {
        repositories {
            google()
            jcenter()
            mavenCentral()


        }
        dependencies {
            classpath 'com.android.tools.build:gradle:3.3.0'

            // NOTE: Do not place your application dependencies here; they belong
            // in the individual module build.gradle files
        }
    }

    allprojects {
        repositories {
            google()
            jcenter()
            mavenCentral()
            mavenLocal()
        }
    }

    task clean(type: Delete) {
        delete rootProject.buildDir
    }

build.gradle (приложение)

apply plugin: 'com.android.application'

    android {
        compileSdkVersion 28
        defaultConfig {
            applicationId "com.example.google_cloud_sql_test"
            minSdkVersion 15
            targetSdkVersion 28
            versionCode 1
            versionName "1.0"
            testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        }
        buildTypes {
            release {
                minifyEnabled false
                proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
            }
        }
    }

    dependencies {
        implementation fileTree(include: ['*.jar'], dir: 'libs')
        implementation 'com.android.support:appcompat-v7:28.0.0'
        implementation 'com.android.support.constraint:constraint-layout:1.1.3'
        testImplementation 'junit:junit:4.12'
        androidTestImplementation 'com.android.support.test:runner:1.0.2'
        androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
        implementation files('libs/appengine-api-1.0-sdk-1.9.68.jar')
        implementation files('libs/commons-codec-1.10.jar')
        implementation files('libs/commons-fileupload-1.3.3.jar')
        implementation files('libs/commons-io-2.2.jar')
        implementation files('libs/commons-lang3-3.2.1.jar')
        implementation files('libs/commons-logging-1.2.jar')
        implementation files('libs/endpoints-framework-2.2.0.jar')
        implementation files('libs/endpoints-management-control-appengine-all-1.0.11.jar')
        implementation files('libs/google-api-client-1.25.0.jar')
        implementation files('libs/google-api-client-appengine-1.25.0.jar')
        implementation files('libs/google-api-client-servlet-1.25.0.jar')
        implementation files('libs/google-http-client-1.25.0.jar')
        implementation files('libs/google-http-client-appengine-1.25.0.jar')
        implementation files('libs/google-http-client-jackson2-1.25.0.jar')
        implementation files('libs/google-http-client-jdo-1.25.0.jar')
        implementation files('libs/google-oauth-client-1.25.0.jar')
        implementation files('libs/google-oauth-client-appengine-1.25.0.jar')
        implementation files('libs/google-oauth-client-servlet-1.25.0.jar')
        implementation files('libs/guava-20.0.jar')
        implementation files('libs/httpclient-4.5.5.jar')
        implementation files('libs/httpcore-4.4.9.jar')
        implementation files('libs/j2objc-annotations-1.1.jar')
        implementation files('libs/jackson-annotations-2.9.6.jar')
        implementation files('libs/jackson-core-2.9.6.jar')
        implementation files('libs/jackson-databind-2.9.6.jar')
        implementation files('libs/jackson-dataformat-yaml-2.4.5.jar')
        implementation files('libs/jackson-datatype-joda-2.4.5.jar')
        implementation files('libs/javax.inject-1.jar')
        implementation files('libs/jdo2-api-2.3-eb.jar')
        implementation files('libs/joda-time-2.2.jar')
        implementation files('libs/jsr305-3.0.1.jar')
        implementation files('libs/servlet-api-2.5.jar')
        implementation files('libs/slf4j-api-1.6.3.jar')
        implementation files('libs/slf4j-nop-1.7.21.jar')
        implementation files('libs/snakeyaml-1.12.jar')
        implementation files('libs/swagger-annotations-1.5.9.jar')
        implementation files('libs/swagger-core-1.5.9.jar')
        implementation files('libs/swagger-models-1.5.9.jar')
        implementation files('libs/transaction-api-1.1.jar')
        implementation files('libs/validation-api-1.1.0.Final.jar')

        compile 'com.google.http-client:google-http-client-gson:1.19.0'



        // BEGIN Google APIs

        // Play Services will validate the application prior to allowing OAuth2 access.
        compile 'com.google.android.gms:play-services:6.5+'

        // The following lines implement maven imports as defined at:
        // https://code.google.com/p/google-api-java-client/wiki/Setup

        // Add the Google API client library.
        compile(group: 'com.google.api-client', name: 'google-api-client', version: '1.21.0') {
            // Exclude artifacts that the Android SDK/Runtime provides.
            exclude(group: 'xpp3', module: 'xpp3')
            exclude(group: 'org.apache.httpcomponents', module: 'httpclient')
            exclude(group: 'junit', module: 'junit')
            exclude(group: 'com.google.android', module: 'android')
        }

        // Add the Android extensions for the Google API client library.
        // This will automatically include play services as long as you have download that library
        // from the Android SDK manager.
        // Add the Android extensions for the Google API client library.
        compile(group: 'com.google.api-client', name: 'google-api-client-android',
                version: '1.21.0')
                {
                    // Exclude play services, since we're not using this yet.
                    exclude(group: 'com.google.android.gms:play-services', module: 'google-play-services')
                }

        // END Google APIs


        // The following client libraries make HTTP/JSON on Android easier.

        // Android extensions for Google HTTP Client.
        compile(group: 'com.google.http-client', name: 'google-http-client-android',
                version: '1.21.0') {
            exclude(group: 'com.google.android', module: 'android')
        }

        // This is used by the Google HTTP client library.
        compile(group: 'com.google.guava', name: 'guava', version: '20.0')



    }