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/src/main/java/org/ntlab/acanthus_client/views/sign_up/SignUpActivity.java b/app/src/main/java/org/ntlab/acanthus_client/views/sign_up/SignUpActivity.java
index c87643a..c794096 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/sign_up/SignUpActivity.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/sign_up/SignUpActivity.java
@@ -8,6 +8,7 @@
 import android.widget.TextView;
 
 import org.ntlab.acanthus_client.R;
+import org.ntlab.acanthus_client.databinding.ActivitySignUpBinding;
 import org.ntlab.acanthus_client.entities.AccountUidJson;
 import org.ntlab.acanthus_client.resources.accounts.AccountsRest;
 import org.ntlab.acanthus_client.views.login.LoginScreenActivity;
@@ -23,59 +24,36 @@
 //-----------------------------------------------------------------
 //
 public class SignUpActivity extends AppCompatActivity {
-    //-----------------------------------------------------------------
-    // 各Viewの列挙型
-    public enum EditTexts {
-        nameForm(0), emailForm(1), passwordForm(2), signUpButton(3), loginButton(4);
-
-        private int textId;
-
-        //-----------------------------------------------------------------
-        private EditTexts(int textId) {
-            this.textId = textId;
-        }
-
-        //-----------------------------------------------------------------
-        // getter
-        public int getTextId() {
-            return this.textId;
-        }
-    }
-
-    //-----------------------------------------------------------------
-    private ArrayList<TextView> views = new ArrayList<>();
+    private ActivitySignUpBinding binding;
 
     //-----------------------------------------------------------------
     //
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_sign_up);
-        initView();
-        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);
+        init();
 
-        onClickSignUp(accountsRest);
+        onClickSignUp();
         onClickAlreadyLoggedIn();
     }
 
     //-----------------------------------------------------------------
     //-----------------------------------------------------------------
     // サインアップ時押下時
-    private void onClickSignUp(AccountsRest accountsRest) {
-        Button signUpButton = (Button) views.get(EditTexts.signUpButton.getTextId());
+    private void onClickSignUp() {
+        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);
+
+        Button signUpButton = (Button) binding.buttonSignUpRegister;
 
         //
         signUpButton.setOnClickListener(v -> {
-            String name = views.get(EditTexts.nameForm.getTextId()).getText().toString();
-            ;
-            String emailAddress = views.get(EditTexts.emailForm.getTextId()).getText().toString();
-            ;
-            String password = views.get(EditTexts.passwordForm.getTextId()).getText().toString();
-            ;
+            String name = binding.editTextTextSignUpPersonName.getText().toString();
+            String emailAddress = binding.editTextTextSignUpEmailAddress.getText().toString();
+            String password = binding.editTextTextSignUpPassword.getText().toString();
 
             Call<AccountUidJson> call = accountsRest.createAccount(name, emailAddress, password);
             call.enqueue(new Callback<AccountUidJson>() {
@@ -95,7 +73,7 @@
     //-----------------------------------------------------------------
     // アカウント所持ボタン押下処理
     private void onClickAlreadyLoggedIn() {
-        Button alreadyLoggedInButton = (Button) views.get(EditTexts.loginButton.getTextId());
+        Button alreadyLoggedInButton = (Button) binding.buttonAlreadyLoggedIn;
 
         // ログイン画面に遷移
         alreadyLoggedInButton.setOnClickListener(v -> {
@@ -115,20 +93,17 @@
     //-----------------------------------------------------------------
     // 登録内容のクリア
     private void clearForm() {
-        for (int i = EditTexts.nameForm.getTextId(); i <= EditTexts.passwordForm.getTextId(); i++) {
-            views.get(i).getEditableText().clear();
-        }
-
+        binding.editTextTextSignUpPersonName.getEditableText().clear();
+        binding.editTextTextSignUpEmailAddress.getEditableText().clear();
+        binding.editTextTextSignUpPassword.getEditableText().clear();
     }
 
     //-----------------------------------------------------------------
     //-----------------------------------------------------------------
-    //
-    private void initView() {
-        views.add(findViewById(R.id.editTextTextSignUpPersonName));
-        views.add(findViewById(R.id.editTextTextSignUpEmailAddress));
-        views.add(findViewById(R.id.editTextTextSignUpPassword));
-        views.add(findViewById(R.id.buttonSignUpRegister));
-        views.add(findViewById(R.id.buttonAlreadyLoggedIn));
+    // 初期化
+    private void init() {
+        setContentView(R.layout.activity_sign_up);
+        binding = ActivitySignUpBinding.inflate(getLayoutInflater());
     }
+    //-----------------------------------------------------------------
 }
\ No newline at end of file