diff --git a/app/src/main/java/com/example/tampopo_client/views/MainActivity.java b/app/src/main/java/com/example/tampopo_client/views/MainActivity.java
index 5fb81c2..14bf304 100644
--- a/app/src/main/java/com/example/tampopo_client/views/MainActivity.java
+++ b/app/src/main/java/com/example/tampopo_client/views/MainActivity.java
@@ -10,6 +10,7 @@
 import android.widget.GridView;
 import android.widget.ImageButton;
 import android.widget.LinearLayout;
+import android.widget.TextView;
 
 import androidx.activity.EdgeToEdge;
 import androidx.appcompat.app.AlertDialog;
@@ -17,19 +18,26 @@
 import androidx.core.graphics.Insets;
 import androidx.core.view.ViewCompat;
 import androidx.core.view.WindowInsetsCompat;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.Observer;
 import androidx.lifecycle.ViewModelProvider;
 
 import com.example.tampopo_client.R;
 import com.example.tampopo_client.Tampopo;
+import com.example.tampopo_client.models.Activity;
 import com.example.tampopo_client.viewmodels.ActivityViewModel;
 import com.example.tampopo_client.viewmodels.UserViewModel;
 
+import java.util.List;
+import java.util.Map;
+
 public class MainActivity extends AppCompatActivity {
 
     private EditText editMessage;
     private ImageButton sendButton;
     private GridView wordGroup;
     private LinearLayout messageList;
+    //private List<String> friendIds = List.of();
     //アクティビティの選択肢
     private String[] words = {"ひまnow", "あそぼ！", "そろそろ会いたない〜？", "勉強なう", "電話しよ～", "お風呂入ってくる～", "今暇だよー！", "いそがしい～!!"};
     private Button openDialogButton;
@@ -64,6 +72,25 @@
         tampopo = (Tampopo) getApplication();
 
 
+//        MutableLiveData<List<String>>friendUserIdsLiveDate = activityViewModel.getFriendUserIdsLiveData();
+//        friendUserIdsLiveDate.observe(this, new Observer<List<String>>() {
+//            @Override
+//            public void onChanged(List<String> friendLive) {
+//                if(friendLive != null){
+//                    friendIds = friendLive;
+//                    updateActivityView(activityViewModel.getActivitiesLiveData().getValue());
+//                }
+//            }
+//        });
+
+        MutableLiveData<Map<String,Activity>> activitiesLiveData = activityViewModel.getActivitiesLiveData();
+        activitiesLiveData.observe(this, new Observer<Map<String,Activity>>() {
+            @Override
+            public void onChanged(Map<String,Activity> activities) {
+                updateActivityView(activities);
+            }
+        });
+
         //メイン画面から通知一覧画面への遷移
 //        ImageButton notificationButton = (ImageButton)findViewById(R.id.notification);
 //        notificationButton.setOnClickListener(new View.OnClickListener() {
@@ -87,7 +114,6 @@
         // ボタンを押すとダイアログ表示（トリガー用）
         openDialogButton = findViewById(R.id.openDialogButton);
         openDialogButton.setOnClickListener(v -> showInputDialog());
-
     }
 
     private void showInputDialog() {
@@ -145,4 +171,27 @@
         dialog.show();
     }
 
+    private void updateActivityView(Map<String, Activity> activities) {
+        TextView comment = this.findViewById(R.id.friend01_comment);
+        for (Activity ac: activities.values()) {
+            comment.setText(ac.getText());
+        }
+
+//        if (activities == null || friendIds == null) return;
+//
+//        messageList.removeAllViews(); // 表示をリセット
+//
+//        for (String userId : friendIds) {
+//            Activity activity = activities.get(userId);
+//            if (activity != null) {
+//                TextView textView = new TextView(this);
+//                textView.setText(activity.getText());
+//                textView.setTextSize(16);
+//                textView.setPadding(16, 16, 16, 16);
+//                // 必要に応じてユーザー名なども表示できる
+//                messageList.addView(textView);
+//            }
+//        }
+    }
+
 }
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