diff --git a/app/src/main/java/com/example/sprout/refactor/activity/RoomListActivity.java b/app/src/main/java/com/example/sprout/refactor/activity/RoomListActivity.java
index 8871446..2284c06 100644
--- a/app/src/main/java/com/example/sprout/refactor/activity/RoomListActivity.java
+++ b/app/src/main/java/com/example/sprout/refactor/activity/RoomListActivity.java
@@ -3,11 +3,14 @@
 import android.databinding.DataBindingUtil;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
+import android.widget.Toast;
 
 import com.example.sprout.R;
 import com.example.sprout.Sprout;
 import com.example.sprout.databinding.RfActivityRoomListBinding;
 import com.example.sprout.refactor.adapter.RoomListAdapter;
+import com.example.sprout.refactor.common.ActivityEvent;
+import com.example.sprout.refactor.contract.ViewContract;
 import com.example.sprout.refactor.viewmodel.RoomListViewModel;
 
 /**
@@ -15,14 +18,34 @@
  *
  * @author matsumoto_k
  */
-public class RoomListActivity extends AppCompatActivity {
+public class RoomListActivity extends AppCompatActivity implements ViewContract {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         RfActivityRoomListBinding binding = DataBindingUtil.setContentView(this, R.layout.rf_activity_room_list);
-        RoomListViewModel roomMainViewModel = new RoomListViewModel(Sprout.get().getRoomRepository(), new RoomListAdapter(this));
+        RoomListViewModel roomMainViewModel = new RoomListViewModel(Sprout.get().getRoomRepository(), new RoomListAdapter(this), (ViewContract) this);
         binding.setViewModel(roomMainViewModel);
         getLifecycle().addObserver(roomMainViewModel);
     }
+
+    @Override
+    public void startActivity(ActivityEvent event) {
+
+    }
+
+    @Override
+    public void finishActivity() {
+
+    }
+
+    @Override
+    public void showShortToast(String message) {
+        Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
+    }
+
+    @Override
+    public void showLongToast(String message) {
+        Toast.makeText(this, message, Toast.LENGTH_LONG).show();
+    }
 }