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 c794096..8d4d1fa 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
@@ -4,6 +4,7 @@
 
 import android.content.Intent;
 import android.os.Bundle;
+import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;
 
@@ -32,53 +33,41 @@
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         init();
-
-        onClickSignUp();
-        onClickAlreadyLoggedIn();
     }
 
     //-----------------------------------------------------------------
     //-----------------------------------------------------------------
     // サインアップ時押下時
-    private void onClickSignUp() {
+    public void onClickSignUp(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);
 
-        Button signUpButton = (Button) binding.buttonSignUpRegister;
+        // 各フォーム取得
+        String name = binding.editTextTextSignUpPersonName.getText().toString();
+        String emailAddress = binding.editTextTextSignUpEmailAddress.getText().toString();
+        String password = binding.editTextTextSignUpPassword.getText().toString();
 
-        //
-        signUpButton.setOnClickListener(v -> {
-            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>() {
+            @Override
+            public void onResponse(Call<AccountUidJson> call, Response<AccountUidJson> response) {
+                if (response.isSuccessful()) transitionLoginActivity();
+                else clearForm();
+            }
 
-            Call<AccountUidJson> call = accountsRest.createAccount(name, emailAddress, password);
-            call.enqueue(new Callback<AccountUidJson>() {
-                @Override
-                public void onResponse(Call<AccountUidJson> call, Response<AccountUidJson> response) {
-                    if (response.isSuccessful()) transitionLoginActivity();
-                    else clearForm();
-                }
-
-                @Override
-                public void onFailure(Call<AccountUidJson> call, Throwable t) {
-                }
-            });
+            @Override
+            public void onFailure(Call<AccountUidJson> call, Throwable t) {
+            }
         });
     }
 
     //-----------------------------------------------------------------
     // アカウント所持ボタン押下処理
-    private void onClickAlreadyLoggedIn() {
-        Button alreadyLoggedInButton = (Button) binding.buttonAlreadyLoggedIn;
-
-        // ログイン画面に遷移
-        alreadyLoggedInButton.setOnClickListener(v -> {
-            transitionLoginActivity();
-        });
+    public void onClickAlreadyLoggedIn(View view) {
+        transitionLoginActivity();
     }
 
     //-----------------------------------------------------------------
diff --git a/app/src/main/res/layout/activity_sign_up.xml b/app/src/main/res/layout/activity_sign_up.xml
index 2859182..f2ac124 100644
--- a/app/src/main/res/layout/activity_sign_up.xml
+++ b/app/src/main/res/layout/activity_sign_up.xml
@@ -89,6 +89,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginBottom="60dp"
+        android:onClick="onClickSignUp"
         android:text="新規登録"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
@@ -114,6 +115,7 @@
         android:id="@+id/buttonAlreadyLoggedIn"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
+        android:onClick="onClickAlreadyLoggedIn"
         android:text="既にアカウントをお持ちの方"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"