diff --git a/.idea/misc.xml b/.idea/misc.xml
index 860da66..d5d35ec 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/app/build.gradle b/app/build.gradle
index bae8461..cd305c3 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -40,6 +40,8 @@
     implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.3.1'
     implementation 'androidx.navigation:navigation-fragment:2.3.5'
     implementation 'androidx.navigation:navigation-ui:2.3.5'
+    implementation 'androidx.annotation:annotation:1.2.0'
+    implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
     testImplementation 'junit:junit:4.+'
     androidTestImplementation 'androidx.test.ext:junit:1.1.2'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 3ea96f8..d948d2b 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -1,26 +1,28 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="org.ntlab.acanthus_client">
+
     <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
 
     <application
-        android:networkSecurityConfig="@xml/network_security_config"
         android:name=".Acanthus"
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="Acanthus"
+        android:networkSecurityConfig="@xml/network_security_config"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.Acanthus">
+        <activity android:name=".views.Login.LoginScreenActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
         <activity
             android:name=".views.MainActivity"
             android:label="@string/title_activity_main">
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-
         </activity>
     </application>
 
diff --git a/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/HelloWorldRest.java b/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/HelloWorldRest.java
new file mode 100644
index 0000000..5db414a
--- /dev/null
+++ b/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/HelloWorldRest.java
@@ -0,0 +1,9 @@
+package org.ntlab.acanthus_client.resources.accounts;
+
+import retrofit2.Call;
+import retrofit2.http.GET;
+
+public interface HelloWorldRest {
+    @GET("hello_world")
+    public Call<String> getHelloWorld();
+}
diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/Login/LoginScreenActivity.java b/app/src/main/java/org/ntlab/acanthus_client/views/Login/LoginScreenActivity.java
new file mode 100644
index 0000000..b3241af
--- /dev/null
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/Login/LoginScreenActivity.java
@@ -0,0 +1,75 @@
+package org.ntlab.acanthus_client.views.Login;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.TextView;
+
+import org.ntlab.acanthus_client.R;
+import org.ntlab.acanthus_client.resources.accounts.LoginRest;
+import org.ntlab.acanthus_client.views.MainActivity;
+import org.ntlab.acanthus_client.views.Main_menu_ui.home.HomeFragment;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+import retrofit2.Retrofit;
+import retrofit2.converter.jackson.JacksonConverterFactory;
+
+//-----------------------------------------------------------------
+// ログイン画面
+public class LoginScreenActivity extends AppCompatActivity {
+    private EditText editNameTextView;
+    private EditText editPasswordTextView;
+    private Button loginButton;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        Retrofit retrofit = new Retrofit.Builder()
+                .baseUrl("http://nitta-lab-www.is.konan-u.ac.jp/acanthus/")
+                .addConverterFactory(JacksonConverterFactory.create())
+                .build();
+
+        final LoginRest loginRest = retrofit.create(LoginRest.class);
+
+        setContentView(R.layout.activity_login_screen);
+        initView();
+
+        loginButton.setOnClickListener(v -> {
+
+            Call<Boolean> call = loginRest.hasLoginToken("1", "abc0");
+            call.enqueue(new Callback<Boolean>() {
+                @Override
+                public void onResponse(Call<Boolean> call, Response<Boolean> response) {
+                    if (response.isSuccessful()) {
+                        loginButton.setText("success");
+                        Intent intent = new Intent(getApplication(), MainActivity.class);
+                        startActivity(intent);
+                        finish();
+                    } else loginButton.setText("faild");
+                }
+
+                @Override
+                public void onFailure(Call<Boolean> call, Throwable t) {
+                    loginButton.setText("failure");
+                }
+            });
+        });
+
+    }
+
+    //-----------------------------------------------------------------
+    //-----------------------------------------------------------------
+    // 各種Viewの初期化
+    private void initView() {
+        editNameTextView = findViewById(R.id.input_user_name);
+        editPasswordTextView = findViewById(R.id.input_password);
+        loginButton = (Button) findViewById(R.id.login_button);
+    }
+    //-----------------------------------------------------------------
+
+}
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_login_screen.xml b/app/src/main/res/layout/activity_login_screen.xml
new file mode 100644
index 0000000..001ad7e
--- /dev/null
+++ b/app/src/main/res/layout/activity_login_screen.xml
@@ -0,0 +1,75 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".views.Login.LoginScreenActivity">
+
+    <TextView
+        android:id="@+id/txt_name"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="60dp"
+        android:layout_marginTop="160dp"
+        android:layout_marginBottom="550dp"
+        android:text="名前"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.0" />
+
+    <Button
+        android:id="@+id/login_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="280dp"
+        android:layout_marginTop="400dp"
+        android:layout_marginEnd="160dp"
+        android:text="ログイン"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <EditText
+        android:id="@+id/input_password"
+        android:layout_width="210dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="100dp"
+        android:layout_marginEnd="60dp"
+        android:ems="10"
+        android:inputType="textPassword"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.56"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.411" />
+
+    <EditText
+        android:id="@+id/input_user_name"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="90dp"
+        android:layout_marginEnd="80dp"
+        android:ems="10"
+        android:inputType="textPersonName"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.964"
+        app:layout_constraintStart_toEndOf="@+id/txt_name"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.233" />
+
+    <TextView
+        android:id="@+id/txt_password"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="40dp"
+        android:text="パスワード"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.396" />
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 48ea4ab..47368aa 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -5,4 +5,12 @@
     <string name="title_make">Edit</string>
     <string name="title_mypage">Mypage</string>
     <string name="title_search">Search</string>
+    <string name="prompt_email">Email</string>
+    <string name="prompt_password">Password</string>
+    <string name="action_sign_in">Sign in or register</string>
+    <string name="action_sign_in_short">Sign in</string>
+    <string name="welcome">"Welcome !"</string>
+    <string name="invalid_username">Not a valid username</string>
+    <string name="invalid_password">Password must be >5 characters</string>
+    <string name="login_failed">"Login failed"</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/xml/network_security_config.xml b/app/src/main/res/xml/network_security_config.xml
index 663d16d..88ca4e8 100644
--- a/app/src/main/res/xml/network_security_config.xml
+++ b/app/src/main/res/xml/network_security_config.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <network-security-config>
     <domain-config cleartextTrafficPermitted="true">
-        <domain includeSubdomains="true">example.com</domain>
+        <domain includeSubdomains="true">http://nitta-lab-www.is.konan-u.ac.jp</domain>
     </domain-config>
 </network-security-config>
\ No newline at end of file