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
index 6154b1d..a13a392 100644
--- 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
@@ -4,11 +4,13 @@
 
 import android.content.Intent;
 import android.os.Bundle;
+import android.view.View;
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.TextView;
 
 import org.ntlab.acanthus_client.R;
+import org.ntlab.acanthus_client.databinding.ActivityLoginScreenBinding;
 import org.ntlab.acanthus_client.entities.AccountTokenJson;
 import org.ntlab.acanthus_client.resources.accounts.AccountsRest;
 import org.ntlab.acanthus_client.views.MainActivity;
@@ -28,92 +30,55 @@
 public class LoginScreenActivity extends AppCompatActivity {
 
     //-----------------------------------------------------------------
-    // 各Viewの列挙型
-    public enum EditTexts {
-        emailForm(0), passwordForm(1), loginButton(2), redoSignUpButton(3);
-
-        private int textId;
-
-        //-----------------------------------------------------------------
-        private EditTexts(int textId) {
-            this.textId = textId;
-        }
-
-        //-----------------------------------------------------------------
-        // getter
-        public int getTextId() {
-            return this.textId;
-        }
-    }
-
-    //-----------------------------------------------------------------
-    private ArrayList<TextView> views = new ArrayList<>();
+    ActivityLoginScreenBinding binding;
 
     //-----------------------------------------------------------------
     //
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_login_screen);
-        initView();
+        init();
+    }
 
+    //-----------------------------------------------------------------
+    // ログインボタン押下時の処理
+    public void onClickLogin(View view) {
         Retrofit retrofit = new Retrofit.Builder()
                 .baseUrl("http://nitta-lab-www.is.konan-u.ac.jp/acanthus/")
                 .addConverterFactory(JacksonConverterFactory.create())
                 .build();
         final AccountsRest accountsRest = retrofit.create(AccountsRest.class);
 
-        onClickLogin(accountsRest);
-        onClickSignUp();
+        String emailAddress = binding.editTextTextLoginEmail.getText().toString();
+        String password = binding.editTextTextLoginPassword.getText().toString();
 
-    }
+        // ログイン
+        Call<AccountTokenJson> call = accountsRest.issueLoginToken(emailAddress, password);
+        call.enqueue(new Callback<AccountTokenJson>() {
+            @Override
+            public void onResponse(Call<AccountTokenJson> call, Response<AccountTokenJson> response) {
+                if (response.isSuccessful()) succeedLogin();
+            }
 
-    //-----------------------------------------------------------------
-    // ログインボタン押下時の処理
-    private void onClickLogin(AccountsRest accountsRest) {
-        Button loginButton = (Button) views.get(EditTexts.loginButton.getTextId());
-
-        loginButton.setOnClickListener(v -> {
-            String emailAddress = views.get(EditTexts.emailForm.getTextId()).getText().toString();
-            String password = views.get(EditTexts.passwordForm.getTextId()).getText().toString();
-
-            // ログイン
-            Call<AccountTokenJson> call = accountsRest.issueLoginToken(emailAddress, password);
-            call.enqueue(new Callback<AccountTokenJson>() {
-                @Override
-                public void onResponse(Call<AccountTokenJson> call, Response<AccountTokenJson> response) {
-                    if (response.isSuccessful()) succeedLogin();
-                    else loginButton.setText("Faild");
-                }
-
-                @Override
-                public void onFailure(Call<AccountTokenJson> call, Throwable t) {
-                    loginButton.setText("failure");
-                }
-            });
+            @Override
+            public void onFailure(Call<AccountTokenJson> call, Throwable t) {
+            }
         });
     }
 
     //-----------------------------------------------------------------
-    // サインアップ画面に遷移
-    private void onClickSignUp() {
-        Button signUpButton = (Button) views.get(EditTexts.redoSignUpButton.getTextId());
-
-        signUpButton.setOnClickListener(v -> {
-            transitionActivity(new SignUpActivity());
-        });
+    // サインアップを押下
+    public void onClickSignUp(View view) {
+        transitionActivity(new SignUpActivity());
     }
 
     //-----------------------------------------------------------------
     //-----------------------------------------------------------------
     //
-    private void initView() {
-        views.add(findViewById(R.id.editTextTextLoginEmail));
-        views.add(findViewById(R.id.editTextTextLoginPassword));
-        views.add(findViewById(R.id.buttonLoginLogin));
-        views.add(findViewById(R.id.buttonRedoSignUp));
+    private void init() {
+        setContentView(R.layout.activity_login_screen);
+        binding = ActivityLoginScreenBinding.inflate(getLayoutInflater());
     }
-
     //-----------------------------------------------------------------
     // ログイン成功時の処理
     private void succeedLogin() {