diff --git a/app/build.gradle b/app/build.gradle
index e778a2b..67b8078 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -38,7 +38,7 @@ dependencies {
     testCompile 'junit:junit:4.12'
 
     // for data binding
-    kapt 'com.android.databinding:compiler:3.0.0'
+    kapt 'com.android.databinding:compiler:3.0.1'
 
     // for dagger2
     compile "com.google.dagger:dagger:2.12"
@@ -49,6 +49,14 @@ dependencies {
     compile "com.github.gfx.android.orma:orma:4.2.5"
     kapt "com.github.gfx.android.orma:orma-processor:4.2.5"
 
+    // for Retrofit2
+    compile 'com.squareup.retrofit2:retrofit:2.3.0'
+    compile 'com.squareup.retrofit2:converter-gson:2.3.0'
+    compile 'com.squareup.okhttp3:logging-interceptor:3.8.1'
+
+    // RxJava/RxAndroid
+    compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
+    compile 'io.reactivex.rxjava2:rxjava:2.1.6'
 
 }
 
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 2e5cb72..e0af0f7 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -2,6 +2,9 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="jp.chau2chaun2.kotlindatabindingsample">
 
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
+    
     <application
         android:name=".CustomApplication"
         android:allowBackup="true"
@@ -10,6 +13,7 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
+
         <activity android:name=".view.MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
@@ -17,13 +21,19 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+
         <activity
             android:name=".view.BMICalculateActivity"
             android:windowSoftInputMode="adjustResize"/>
+
         <activity
             android:name=".view.BMIRealtimeCalculateActivity"
             android:windowSoftInputMode="adjustResize"/>
+
         <activity android:name=".view.BMIListActivity" />
+
+        <activity android:name=".view.RandomUserListActivity" />
+
     </application>
 
-</manifest>
\ No newline at end of file
+</manifest>
diff --git a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/dao/NameDao.kt b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/dao/NameDao.kt
new file mode 100644
index 0000000..ec137d4
--- /dev/null
+++ b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/dao/NameDao.kt
@@ -0,0 +1,25 @@
+package jp.chau2chaun2.kotlindatabindingsample.dao
+
+import com.github.gfx.android.orma.SingleAssociation
+import jp.chau2chaun2.kotlindatabindingsample.model.orma.Name_Relation
+import jp.chau2chaun2.kotlindatabindingsample.model.orma.OrmaDatabase
+import jp.chau2chaun2.kotlindatabindingsample.model.orma.RandomUser
+import javax.inject.Inject
+
+class NameDao @Inject constructor(private val ormaDatabase: OrmaDatabase) {
+
+    val relation: Name_Relation = ormaDatabase.relationOfName()
+
+    fun insert(randomUser: RandomUser) {
+        randomUser.results.forEach { result ->
+            result.serializedName?.let { name ->
+                relation.inserter().execute(name).also {
+                    name.id = it
+                    result.name = SingleAssociation.just(it)
+                }
+            }
+        }
+    }
+
+    fun deleteAll(): Int = relation.deleter().execute()
+}
diff --git a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/dao/ResultDao.kt b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/dao/ResultDao.kt
new file mode 100644
index 0000000..0ae5aa9
--- /dev/null
+++ b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/dao/ResultDao.kt
@@ -0,0 +1,20 @@
+package jp.chau2chaun2.kotlindatabindingsample.dao
+
+import jp.chau2chaun2.kotlindatabindingsample.model.orma.OrmaDatabase
+import jp.chau2chaun2.kotlindatabindingsample.model.orma.RandomUser
+import jp.chau2chaun2.kotlindatabindingsample.model.orma.Result_Relation
+import javax.inject.Inject
+
+/**
+ * Equals User Dao actually.
+ */
+class ResultDao @Inject constructor(private val ormaDatabase: OrmaDatabase) {
+
+    val relation: Result_Relation = ormaDatabase.relationOfResult()
+
+    fun insert(randomUser: RandomUser) {
+        randomUser.results.forEach { result ->
+            relation.inserter().execute(result).also { result.id = it }
+        }
+    }
+}
diff --git a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/di/ActivityComponent.kt b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/di/ActivityComponent.kt
index 83a49c5..6838ac9 100644
--- a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/di/ActivityComponent.kt
+++ b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/di/ActivityComponent.kt
@@ -4,6 +4,7 @@ import dagger.Subcomponent
 import jp.chau2chaun2.kotlindatabindingsample.view.BMICalculateActivity
 import jp.chau2chaun2.kotlindatabindingsample.view.BMIListActivity
 import jp.chau2chaun2.kotlindatabindingsample.view.BMIRealtimeCalculateActivity
+import jp.chau2chaun2.kotlindatabindingsample.view.RandomUserListActivity
 
 @ActivityScope
 @Subcomponent(modules = arrayOf(ActivityModule::class))
@@ -14,4 +15,6 @@ interface ActivityComponent {
     fun inject(activity: BMICalculateActivity)
 
     fun inject(activity: BMIListActivity)
+
+    fun inject(activity: RandomUserListActivity)
 }
diff --git a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/di/AppModule.kt b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/di/AppModule.kt
index 802485f..531c59d 100644
--- a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/di/AppModule.kt
+++ b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/di/AppModule.kt
@@ -7,9 +7,11 @@ import com.github.gfx.android.orma.AccessThreadConstraint
 import dagger.Module
 import dagger.Provides
 import jp.chau2chaun2.kotlindatabindingsample.model.orma.OrmaDatabase
+import jp.chau2chaun2.kotlindatabindingsample.net.ApiService
+import jp.chau2chaun2.kotlindatabindingsample.net.IApiService
 import javax.inject.Singleton
 
-@Module
+@Module(includes = arrayOf(ClientModule::class))
 class AppModule(private val mContext: Context) {
 
     @Provides
@@ -36,4 +38,10 @@ class AppModule(private val mContext: Context) {
                 .readOnMainThread(AccessThreadConstraint.NONE)
                 .build()
     }
+
+    @Singleton
+    @Provides
+    internal fun providesApiService(): IApiService {
+        return ApiService().service
+    }
 }
diff --git a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/di/ClientModule.kt b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/di/ClientModule.kt
new file mode 100644
index 0000000..93d81db
--- /dev/null
+++ b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/di/ClientModule.kt
@@ -0,0 +1,11 @@
+package jp.chau2chaun2.kotlindatabindingsample.di
+
+import dagger.Binds
+import dagger.Module
+import jp.chau2chaun2.kotlindatabindingsample.net.client.ApiRandomUserClient
+import jp.chau2chaun2.kotlindatabindingsample.net.client.IApiRandomUser
+
+@Module
+interface ClientModule {
+    @Binds fun bindApiService(client: ApiRandomUserClient): IApiRandomUser
+}
diff --git a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/model/orma/RandomUser.kt b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/model/orma/RandomUser.kt
new file mode 100644
index 0000000..70df6b4
--- /dev/null
+++ b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/model/orma/RandomUser.kt
@@ -0,0 +1,58 @@
+package jp.chau2chaun2.kotlindatabindingsample.model.orma
+
+import com.github.gfx.android.orma.SingleAssociation
+import com.github.gfx.android.orma.annotation.Column
+import com.github.gfx.android.orma.annotation.PrimaryKey
+import com.github.gfx.android.orma.annotation.Table
+import com.google.gson.annotations.SerializedName
+
+data class RandomUser(val info: Info,
+                      val results: List<Result>)
+
+data class Info(val seed: String,
+                val results: Int,
+                val page: Int,
+                val version: String)
+
+@Table("user")
+class Result {
+
+    @PrimaryKey
+    @Transient
+    var id: Long = 0
+
+    @Column lateinit var gender: String
+
+    @Column lateinit var email: String
+
+    @Column lateinit var registered: String
+
+    @Column lateinit var dob: String
+
+    @Column lateinit var phone: String
+
+    @Column lateinit var cell: String
+
+    @Column lateinit var nat: String
+
+    @SerializedName("name")
+    var serializedName: Name? = null
+
+    @Column
+    @Transient
+    var name: SingleAssociation<Name> = SingleAssociation.just(0)
+}
+
+@Table("name")
+class Name {
+
+    @PrimaryKey
+    @Transient
+    var id: Long = 0
+
+    @Column lateinit var first: String
+
+    @Column lateinit var last: String
+
+    @Column lateinit var title: String
+}
diff --git a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/net/ApiService.kt b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/net/ApiService.kt
new file mode 100644
index 0000000..6bea720
--- /dev/null
+++ b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/net/ApiService.kt
@@ -0,0 +1,66 @@
+package jp.chau2chaun2.kotlindatabindingsample.net
+
+import com.google.gson.GsonBuilder
+import jp.chau2chaun2.kotlindatabindingsample.model.orma.RandomUser
+import okhttp3.Interceptor
+import okhttp3.OkHttpClient
+import okhttp3.logging.HttpLoggingInterceptor
+import retrofit2.Call
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+import retrofit2.http.GET
+import java.util.concurrent.TimeUnit
+
+
+
+class ApiService {
+
+    // core for controller
+    val service: IApiService = create(IApiService::class.java)
+
+    lateinit var retrofit: Retrofit
+
+    fun <S> create(serviceClass: Class<S>): S {
+        val gson = GsonBuilder()
+                .serializeNulls()
+                .create()
+
+        // create retrofit
+        retrofit = Retrofit.Builder()
+                .addConverterFactory(GsonConverterFactory.create(gson))
+                .baseUrl("http://randomuser.me/")
+                .client(httpBuilder.build())
+                .build()
+
+        return retrofit.create(serviceClass)
+    }
+
+    val httpBuilder: OkHttpClient.Builder get() {
+        // create http client
+        val httpClient = OkHttpClient.Builder()
+                .addInterceptor(Interceptor { chain ->
+                    val original = chain.request()
+
+                    //header
+                    val request = original.newBuilder()
+                            .header("Accept", "application/json")
+                            .method(original.method(), original.body())
+                            .build()
+
+                    return@Interceptor chain.proceed(request)
+                })
+                .readTimeout(30, TimeUnit.SECONDS)
+
+        // log interceptor
+        val loggingInterceptor = HttpLoggingInterceptor()
+        loggingInterceptor.level = HttpLoggingInterceptor.Level.BODY
+        httpClient.addInterceptor(loggingInterceptor)
+
+        return httpClient
+    }
+}
+
+interface IApiService {
+    @GET("api")
+    fun apiDemo(): Call<RandomUser>
+}
diff --git a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/net/client/ApiRandomUserClient.kt b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/net/client/ApiRandomUserClient.kt
new file mode 100644
index 0000000..bb8af8d
--- /dev/null
+++ b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/net/client/ApiRandomUserClient.kt
@@ -0,0 +1,56 @@
+package jp.chau2chaun2.kotlindatabindingsample.net.client
+
+import android.accounts.NetworkErrorException
+import io.reactivex.Observable
+import io.reactivex.Single
+import jp.chau2chaun2.kotlindatabindingsample.model.orma.RandomUser
+import jp.chau2chaun2.kotlindatabindingsample.net.IApiService
+import javax.inject.Inject
+
+interface IApiRandomUser {
+    fun getRandomUser(): Single<RandomUser>
+    fun getRandomUser(numberOfUsers: Int): Observable<RandomUser>
+}
+
+class ApiRandomUserClient @Inject constructor(private val apiService: IApiService) : IApiRandomUser {
+
+    override fun getRandomUser(): Single<RandomUser> {
+        return Single.create { subscriber ->
+            try {
+                val responce = apiService.apiDemo().execute()
+
+                responce.body()?.takeIf { responce.isSuccessful }?.let {
+                    subscriber.onSuccess(it)
+                } ?: run {
+                    subscriber.onError(NetworkErrorException("Error occurred somehow."))
+                }
+
+            } catch (e: NetworkErrorException) {
+                subscriber.onError(e)
+            }
+        }
+    }
+
+    override fun getRandomUser(numberOfUsers: Int): Observable<RandomUser> {
+        return Observable.create { subscriber ->
+            try {
+                for (i in 0 until numberOfUsers) {
+                    val responce = apiService.apiDemo().execute()
+
+                    responce.body()?.takeIf { responce.isSuccessful }?.let {
+                        subscriber.onNext(it)
+
+                    } ?: run {
+                        subscriber.onError(NetworkErrorException("Error occurred somehow."))
+                        return@create
+                    }
+                }
+
+                subscriber.onComplete()
+
+            } catch (e: NetworkErrorException) {
+                subscriber.onError(e)
+            }
+        }
+    }
+}
diff --git a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/presenter/RandomUserPresenter.kt b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/presenter/RandomUserPresenter.kt
new file mode 100644
index 0000000..91988e3
--- /dev/null
+++ b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/presenter/RandomUserPresenter.kt
@@ -0,0 +1,60 @@
+package jp.chau2chaun2.kotlindatabindingsample.presenter
+
+import android.content.Context
+import android.widget.Toast
+import io.reactivex.android.schedulers.AndroidSchedulers
+import io.reactivex.schedulers.Schedulers
+import jp.chau2chaun2.kotlindatabindingsample.dao.NameDao
+import jp.chau2chaun2.kotlindatabindingsample.dao.ResultDao
+import jp.chau2chaun2.kotlindatabindingsample.model.orma.RandomUser
+import jp.chau2chaun2.kotlindatabindingsample.model.orma.Result
+import jp.chau2chaun2.kotlindatabindingsample.net.client.IApiRandomUser
+import javax.inject.Inject
+
+class RandomUserPresenter @Inject constructor(private val context: Context,
+                                              private val apiRandomUser: IApiRandomUser,
+                                              private val resultDao: ResultDao,
+                                              private val nameDao: NameDao) {
+
+    fun getCurrentUsers(): List<Result> = resultDao.relation.toList()
+
+    fun getNewRandomUser(callback: () -> Unit) {
+        apiRandomUser.getRandomUser()
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe({ newRandomUser ->
+                    // Successful
+                    registeredRandomUser(newRandomUser)
+                    callback()
+
+                }, {
+                    // Failed
+                    Toast.makeText(context, "Sth Error occurred.", Toast.LENGTH_SHORT).show()
+                })
+    }
+
+    fun getNewRandomUsers(numberOfUsers: Int, callback: () -> Unit) {
+        apiRandomUser.getRandomUser(numberOfUsers)
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe({ newRandomUser ->
+                    // onNext
+                    registeredRandomUser(newRandomUser)
+                    callback()
+
+                }, { e ->
+                    // onError
+                    Toast.makeText(context, "Sth Error occurred. ${e.message}", Toast.LENGTH_SHORT).show()
+                }, {
+                    // onComplete
+                    // Nothing to do.
+                })
+    }
+
+    fun deleteAll(): Int = nameDao.deleteAll()
+
+    private fun registeredRandomUser(randomUser: RandomUser) {
+        nameDao.insert(randomUser)
+        resultDao.insert(randomUser)
+    }
+}
diff --git a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/task/RandomUserGetterTask.kt b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/task/RandomUserGetterTask.kt
new file mode 100644
index 0000000..4488310
--- /dev/null
+++ b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/task/RandomUserGetterTask.kt
@@ -0,0 +1,17 @@
+package jp.chau2chaun2.kotlindatabindingsample.task
+
+import android.databinding.ObservableBoolean
+import android.util.Log
+import jp.chau2chaun2.kotlindatabindingsample.net.client.IApiRandomUser
+
+
+class RandomUserGetterTask(private val apiRandomUser: IApiRandomUser) {
+
+    val loading = ObservableBoolean(false)
+
+    fun execute() {
+        Thread(Runnable {
+            Log.e("test", apiRandomUser.getRandomUser().toString())
+        }).start()
+    }
+}
diff --git a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/view/MainActivity.kt b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/view/MainActivity.kt
index 0956d25..b646b5a 100644
--- a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/view/MainActivity.kt
+++ b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/view/MainActivity.kt
@@ -19,4 +19,6 @@ class MainActivity : AppCompatActivity() {
     fun onClickBMIRealtimeCalculate(view: View) = startActivity(BMIRealtimeCalculateActivity.getIntent(this))
 
     fun onClickBMIList(view: View) = startActivity(BMIListActivity.getIntent(this))
+
+    fun onClickRandomUserList(view: View) = startActivity(RandomUserListActivity.getIntent(this))
 }
diff --git a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/view/RandomUserListActivity.kt b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/view/RandomUserListActivity.kt
new file mode 100644
index 0000000..b096f05
--- /dev/null
+++ b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/view/RandomUserListActivity.kt
@@ -0,0 +1,63 @@
+package jp.chau2chaun2.kotlindatabindingsample.view
+
+import android.content.Context
+import android.content.Intent
+import android.databinding.DataBindingUtil
+import android.os.Bundle
+import android.view.Menu
+import android.view.MenuItem
+import jp.chau2chaun2.kotlindatabindingsample.R
+import jp.chau2chaun2.kotlindatabindingsample.databinding.ActivityUserListBinding
+import jp.chau2chaun2.kotlindatabindingsample.view.adapter.RandomUserListAdapter
+import jp.chau2chaun2.kotlindatabindingsample.viewmodel.RandomUserListActivityViewModel
+import javax.inject.Inject
+
+class RandomUserListActivity : BaseActivity() {
+
+    @Inject lateinit var adapter: RandomUserListAdapter
+
+    @Inject lateinit var viewModel: RandomUserListActivityViewModel
+
+    private val binding: ActivityUserListBinding by lazy {
+        DataBindingUtil.setContentView<ActivityUserListBinding>(this, R.layout.activity_user_list)
+    }
+
+    override fun onActivityInject() {
+        mComponent.inject(this)
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        binding.list.adapter = this.adapter
+    }
+
+    override fun onCreateOptionsMenu(menu: Menu): Boolean {
+        menuInflater.inflate(R.menu.add_menu, menu)
+        return super.onCreateOptionsMenu(menu)
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        when (item.itemId) {
+            R.id.add_single -> {
+                viewModel.addSingle { adapter.notifyDataSetChanged() }
+            }
+
+            R.id.add_multiple -> {
+                viewModel.addMultiple { adapter.notifyDataSetChanged() }
+            }
+
+            R.id.delete_all -> {
+                viewModel.deleteAll()
+                adapter.notifyDataSetChanged()
+            }
+        }
+        return super.onOptionsItemSelected(item)
+    }
+
+    companion object {
+        fun getIntent(context: Context): Intent {
+            return Intent(context, RandomUserListActivity::class.java)
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/view/adapter/RandomUserListAdapter.kt b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/view/adapter/RandomUserListAdapter.kt
new file mode 100644
index 0000000..5490e93
--- /dev/null
+++ b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/view/adapter/RandomUserListAdapter.kt
@@ -0,0 +1,51 @@
+package jp.chau2chaun2.kotlindatabindingsample.view.adapter
+
+import android.content.Context
+import android.databinding.DataBindingUtil
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.BaseAdapter
+import jp.chau2chaun2.kotlindatabindingsample.databinding.RowUserListBinding
+import jp.chau2chaun2.kotlindatabindingsample.model.orma.Result
+import jp.chau2chaun2.kotlindatabindingsample.presenter.RandomUserPresenter
+import javax.inject.Inject
+
+class RandomUserListAdapter @Inject constructor(context: Context,
+                                                private val presenter: RandomUserPresenter) : BaseAdapter() {
+
+    private var layoutInflater: LayoutInflater = LayoutInflater.from(context)
+
+    private lateinit var users: List<Result>
+
+    init {
+        updateModel()
+    }
+
+    private fun updateModel() {
+        users = presenter.getCurrentUsers()
+    }
+
+    override fun notifyDataSetChanged() {
+        updateModel()
+        super.notifyDataSetChanged()
+    }
+
+    override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+        val binding = convertView
+                ?.let { DataBindingUtil.findBinding<RowUserListBinding>(convertView) }
+                ?: RowUserListBinding.inflate(layoutInflater)
+
+        binding.data = getItem(position)
+        binding.name = getItem(position).name.get()
+
+        return binding.root
+    }
+
+    override fun getItem(position: Int): Result = users[position]
+
+    override fun getItemId(p0: Int): Long = 0
+
+    override fun getCount(): Int = users.size
+
+}
diff --git a/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/viewmodel/RandomUserListActivityViewModel.kt b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/viewmodel/RandomUserListActivityViewModel.kt
new file mode 100644
index 0000000..8924ca0
--- /dev/null
+++ b/app/src/main/java/jp/chau2chaun2/kotlindatabindingsample/viewmodel/RandomUserListActivityViewModel.kt
@@ -0,0 +1,49 @@
+package jp.chau2chaun2.kotlindatabindingsample.viewmodel
+
+import android.content.Context
+import android.widget.Toast
+import jp.chau2chaun2.kotlindatabindingsample.presenter.RandomUserPresenter
+import javax.inject.Inject
+
+class RandomUserListActivityViewModel @Inject constructor(context: Context,
+                                                          private val presenter: RandomUserPresenter) {
+
+    val toast: Toast = Toast.makeText(context, "", Toast.LENGTH_LONG)
+
+    var loadingUserCount: Int = 0
+
+    fun addSingle(callback: () -> Unit) {
+        loadingUserCount++
+        showLoadingToast()
+        presenter.getNewRandomUser {
+            --loadingUserCount
+            showLoadingToast()
+            callback()
+        }
+    }
+
+    fun addMultiple(callback: () -> Unit) {
+        loadingUserCount += 10
+        showLoadingToast()
+        presenter.getNewRandomUsers(10) {
+            --loadingUserCount
+            showLoadingToast()
+            callback()
+        }
+    }
+
+    private fun showLoadingToast() {
+        if (loadingUserCount > 0) {
+            toast.setText("New User loading... / ${loadingUserCount} user(s).")
+        } else {
+            toast.setText("LOAD COMPLETED")
+        }
+        toast.show()
+    }
+
+    fun deleteAll() {
+        val recordCount = presenter.deleteAll()
+        toast.setText("Deleted $recordCount Users")
+        toast.show()
+    }
+}
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index e555712..abb4163 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -23,4 +23,10 @@
         android:text="@string/move_to_BMIListActivity"
         android:onClick="onClickBMIList"/>
 
+    <Button
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/move_to_RandomUserListActivity"
+        android:onClick="onClickRandomUserList"/>
+
 </LinearLayout>
diff --git a/app/src/main/res/layout/activity_user_list.xml b/app/src/main/res/layout/activity_user_list.xml
new file mode 100644
index 0000000..bd74b4b
--- /dev/null
+++ b/app/src/main/res/layout/activity_user_list.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <data>
+
+        <import type="jp.chau2chaun2.kotlindatabindingsample.model.orma.Result" />
+
+        <import type="java.util.List" />
+
+        <variable
+            name="result"
+            type="Result" />
+
+        <variable
+            name="results"
+            type="List&lt;Result&gt;" />
+    </data>
+
+    <ListView
+        android:id="@+id/list"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+</layout>
diff --git a/app/src/main/res/layout/row_user_list.xml b/app/src/main/res/layout/row_user_list.xml
new file mode 100644
index 0000000..fa1984b
--- /dev/null
+++ b/app/src/main/res/layout/row_user_list.xml
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+    <data>
+        <import type="android.view.View" />
+        <variable
+            name="data"
+            type="jp.chau2chaun2.kotlindatabindingsample.model.orma.Result" />
+        <variable
+            name="name"
+            type="jp.chau2chaun2.kotlindatabindingsample.model.orma.Name" />
+    </data>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="@dimen/half_margin"
+        android:layout_marginLeft="@dimen/general_margin"
+        android:layout_marginRight="@dimen/general_margin"
+        android:layout_marginTop="@dimen/half_margin"
+        android:orientation="vertical">
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@{@string/title_first_last(name.title, name.first, name.last)}"
+            tools:text="Mr. Hiroki Honda" />
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@{@string/gender_nation_cell(data.gender, data.nat, data.cell)}"
+            android:textSize="@dimen/small_text_size"
+            tools:text="Male / JP / +1234-567-8900" />
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@{data.email}"
+            android:textSize="@dimen/small_text_size"
+            tools:text="xxxxxx@example.com" />
+
+    </LinearLayout>
+</layout>
diff --git a/app/src/main/res/menu/add_menu.xml b/app/src/main/res/menu/add_menu.xml
new file mode 100644
index 0000000..3ba37ca
--- /dev/null
+++ b/app/src/main/res/menu/add_menu.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:id="@+id/add_single"
+        android:title="Add single item" />
+
+    <item
+        android:id="@+id/add_multiple"
+        android:title="Add multiple item" />
+
+    <item
+        android:id="@+id/delete_all"
+        android:title="Delete All" />
+
+</menu>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index c3ee1cc..61297f0 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -11,8 +11,11 @@
     <string name="bmi_plus">BMI: %.1f</string>
     <string name="cm">cm</string>
     <string name="kg">kg</string>
+    <string name="title_first_last">%1$s. %2$s %3$s</string>
+    <string name="gender_nation_cell">%1$s / %2$s / %3$s</string>
 
     <string name="move_to_BMICalculateActivity">DataBinding Basic</string>
     <string name="move_to_BMIRealtimeCalculateActivity">DataBinding Bindable</string>
     <string name="move_to_BMIListActivity">BindingAdapter Sample</string>
+    <string name="move_to_RandomUserListActivity">Retrofit Sample</string>
 </resources>
diff --git a/build.gradle b/build.gradle
index 815fcff..68fad17 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,13 +1,13 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.1.51'
+    ext.kotlin_version = '1.1.60'
     repositories {
         jcenter()
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.0'
+        classpath 'com.android.tools.build:gradle:3.0.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong