diff --git a/app/src/main/java/com/example/cosmosclient/views/GroupList.java b/app/src/main/java/com/example/cosmosclient/views/GroupList.java
index b512f02..30f6f2a 100644
--- a/app/src/main/java/com/example/cosmosclient/views/GroupList.java
+++ b/app/src/main/java/com/example/cosmosclient/views/GroupList.java
@@ -28,7 +28,7 @@
         Toolbar toolbar = findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
 
-        /*とりあえずの画面遷移なので変更するかも*/
+        /* とりあえずの画面遷移なので変更するかも */
         TextView group1 = findViewById(R.id.group1);
         group1.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -38,6 +38,7 @@
             }
         });
 
+
         DrawerLayout drawer = findViewById(R.id.drawer_layout);
         NavigationView navigationView = findViewById(R.id.nav_view);
         ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
@@ -82,10 +83,18 @@
     @SuppressWarnings("StatementWithEmptyBody")
     @Override
     public boolean onNavigationItemSelected(MenuItem item) {
+
+
         // Handle navigation view item clicks here.
         int id = item.getItemId();
         if ( id == R.id.createNewGroupButton){
 
+        } else if (id == R.id.joinGroupButton){
+            //Intent intent=new Intent(GroupList.this, com.example.cosmosclient.views.QRcodeReadingActivity.class);
+            //startActivity(intent);
+        } else if (id == R.id.signOutButton){
+            Intent intent=new Intent(GroupList.this, com.example.cosmosclient.views.SigninActivity.class);
+            startActivity(intent);
         }
 /*
         if (id == R.id.nav_home) {