diff --git a/app/src/main/java/com/example/cosmosclient/views/JoinGroupByIDActivity.java b/app/src/main/java/com/example/cosmosclient/views/JoinGroupByIDActivity.java
index d62ef21..d6c8dda 100644
--- a/app/src/main/java/com/example/cosmosclient/views/JoinGroupByIDActivity.java
+++ b/app/src/main/java/com/example/cosmosclient/views/JoinGroupByIDActivity.java
@@ -67,21 +67,30 @@
                     @Override
                     public void onResponse(Call<JoinGroupResponse> call, Response<JoinGroupResponse> response) {
                         if (response.isSuccessful()) {
-//                            JoinGroupResponse result = response.body();
                             //成功時
-                            JoinGroupResponse result = response.body();
-                            Group g = new Group(result.gId,result.uri,result.name,uId);
+                            final JoinGroupResponse result = response.body();
+                            //追加ボタンに関する記述
+                            test.setText(result.name);
+                            Button AddBtn = (Button)findViewById(R.id.Addbutton);
+                            AddBtn.setVisibility(View.VISIBLE);
 
-                            //app/CosmosにgIdを保存
-                            Cosmos app = (Cosmos)getApplication();
-                            app.setCurrentGroup(g);
+                            AddBtn.setOnClickListener(new View.OnClickListener() {
+                                @Override
+                                public void onClick(View v) {
+                                    Group g = new Group(result.gId, result.uri, result.name, uId);
 
-                            Intent intent = new Intent(getApplication(), RequestListActivity.class);
-                            startActivity(intent);
-                            //ここで成功の処理を記述
-                            finish();
+                                    //app/CosmosにgIdを保存
+                                    Cosmos app = (Cosmos) getApplication();
+                                    app.setCurrentGroup(g);
 
-                        } else {
+                                    Intent intent = new Intent(getApplication(), RequestListActivity.class);
+                                    startActivity(intent);
+                                    finish();
+
+                                }
+                            });
+
+                        }else {
                             //onFailureでキャッチできないエラー用
                             //ここでエラーの処理を記述
                             test.setText("失敗");
diff --git a/app/src/main/java/com/example/cosmosclient/views/QRcodeReadingActivity.java b/app/src/main/java/com/example/cosmosclient/views/QRcodeReadingActivity.java
index 94c6750..957fee5 100644
--- a/app/src/main/java/com/example/cosmosclient/views/QRcodeReadingActivity.java
+++ b/app/src/main/java/com/example/cosmosclient/views/QRcodeReadingActivity.java
@@ -5,6 +5,7 @@
 import android.os.Bundle;
 import android.util.Log;
 import android.view.View;
+import android.widget.Button;
 import android.widget.EditText;
 import android.widget.TextView;
 import android.widget.Toast;
@@ -50,7 +51,7 @@
         final IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
         if(result != null) {
             QRcodeData = (String)result.getContents();
-            QRcodeResult.setText(QRcodeData);
+//            QRcodeResult.setText(QRcodeData);
         } else {
             super.onActivityResult(requestCode, resultCode, data);
         }
@@ -88,18 +89,25 @@
             public void onResponse(Call<JoinGroupResponse> call, Response<JoinGroupResponse> response) {
                 if (response.isSuccessful()) {
                     //成功時
-                    JoinGroupResponse result = response.body();
-                    Group g = new Group(result.gId,result.uri,result.name,uId);
+                    final JoinGroupResponse result = response.body();
+                    QRcodeResult.setText(result.name);
+                    Button AddBtn = (Button)findViewById(R.id.Addbutton);
 
-                    //app/CosmosにgIdを保存
-                    Cosmos app = (Cosmos)getApplication();
-                    app.setCurrentGroup(g);
+                    AddBtn.setOnClickListener(new View.OnClickListener() {
+                        @Override
+                        public void onClick(View v) {
+                            Group g = new Group(result.gId, result.uri, result.name, uId);
 
-                    Intent intent = new Intent(getApplication(), RequestListActivity.class);
-                    startActivity(intent);
-                    //ここで成功の処理を記述
-                    finish();
+                            //app/CosmosにgIdを保存
+                            Cosmos app = (Cosmos) getApplication();
+                            app.setCurrentGroup(g);
 
+                            Intent intent = new Intent(getApplication(), RequestListActivity.class);
+                            startActivity(intent);
+                            finish();
+
+                        }
+                    });
 
 
                 } else {
diff --git a/app/src/main/res/layout/activity_join_group_by_id.xml b/app/src/main/res/layout/activity_join_group_by_id.xml
index 4ddeff1..9f744f2 100644
--- a/app/src/main/res/layout/activity_join_group_by_id.xml
+++ b/app/src/main/res/layout/activity_join_group_by_id.xml
@@ -35,15 +35,6 @@
         app:layout_constraintTop_toTopOf="parent"
         tools:layout_editor_absoluteX="16dp" />
 
-    <Button
-        android:id="@+id/button"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginEnd="40dp"
-        android:layout_marginRight="40dp"
-        android:text="検索"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintTop_toTopOf="@+id/inputGroupID" />
 
     <TextView
         android:id="@+id/IDresult"
@@ -51,12 +42,35 @@
         android:layout_height="wrap_content"
         android:layout_marginStart="8dp"
         android:layout_marginLeft="8dp"
-        android:layout_marginTop="260dp"
+        android:layout_marginTop="192dp"
         android:layout_marginEnd="8dp"
         android:layout_marginRight="8dp"
         android:textSize="24sp"
         app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.458"
+        app:layout_constraintHorizontal_bias="0.445"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="@+id/inputGroupID" />
+
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="40dp"
+        android:layout_marginRight="40dp"
+        android:text="検索"
+        app:layout_constraintBottom_toBottomOf="@+id/inputGroupID"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="@+id/inputGroupID" />
+
+    <Button
+        android:id="@+id/Addbutton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="40dp"
+        android:layout_marginRight="40dp"
+        android:text="グループに入る"
+        android:visibility="invisible"
+        app:layout_constraintBottom_toBottomOf="@+id/IDresult"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="@+id/IDresult" />
 </android.support.constraint.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_qrcode_reading.xml b/app/src/main/res/layout/activity_qrcode_reading.xml
index 5fb778a..82e66d2 100644
--- a/app/src/main/res/layout/activity_qrcode_reading.xml
+++ b/app/src/main/res/layout/activity_qrcode_reading.xml
@@ -5,16 +5,28 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context=".views.QRcodeReadingActivity">
-
+    <TextView
+        android:id="@+id/textView7"
+        android:layout_width="match_parent"
+        android:layout_height="75dp"
+        android:background="#e6eae3"
+        android:gravity="center"
+        android:text="QRコードで入る"
+        android:textSize="24sp"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:layout_editor_absoluteX="16dp" />
     <TextView
         android:id="@+id/QRcodeResult"
-        android:layout_width="0dp"
+        android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:gravity="center"
-        android:text="aaaaaaaaaaaaaaaa"
-        app:layout_constraintBottom_toBottomOf="parent"
+        android:layout_marginStart="8dp"
+        android:layout_marginLeft="8dp"
+        android:layout_marginTop="328dp"
+        android:layout_marginEnd="8dp"
+        android:layout_marginRight="8dp"
+        android:textSize="24sp"
         app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintHorizontal_bias="0.498"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
@@ -30,4 +42,16 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/QRcodeResult" />
 
+    <Button
+        android:id="@+id/Addbutton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="16dp"
+        android:layout_marginRight="16dp"
+        android:text="グループに入る"
+        app:layout_constraintBottom_toBottomOf="@+id/QRcodeResult"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="@+id/QRcodeResult"
+        app:layout_constraintVertical_bias="0.437" />
+
 </android.support.constraint.ConstraintLayout>
\ No newline at end of file