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 00c00eb..1b901eb 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
@@ -1,16 +1,11 @@
 package com.example.sprout.refactor.activity;
 
-import android.content.Intent;
 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.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;
 
 /**
@@ -18,44 +13,29 @@
  *
  * @author matsumoto_k
  */
-public class RoomListActivity extends AppCompatActivity implements ViewContract {
+public class RoomListActivity extends BaseActivity {
+
+    private RoomListViewModel roomMainViewModel = null;
+    private RfActivityRoomListBinding binding = null;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        RfActivityRoomListBinding binding = DataBindingUtil.setContentView(this, R.layout.rf_activity_room_list);
-        RoomListViewModel roomMainViewModel = new RoomListViewModel(new RoomListAdapter(this), (ViewContract) this);
+        binding = DataBindingUtil.setContentView(this, R.layout.rf_activity_room_list);
+        roomMainViewModel = new RoomListViewModel(new RoomListAdapter(this));
         binding.setViewModel(roomMainViewModel);
         getLifecycle().addObserver(roomMainViewModel);
     }
 
     @Override
-    public void startActivity(ActivityEvent event) {
-        switch (event) {
-            case CREATE_ROOM:
-                startActivity(new Intent(RoomListActivity.this, RoomCreateActivity.class));
-                break;
-            case ROOM_MAIN:
-                startActivity(new Intent(RoomListActivity.this, RoomMainActivity.class));
-                break;
-            case INPUT_KEY:
-                startActivity(new Intent(RoomListActivity.this, RoomInputKeyActivity.class));
-                break;
-        }
+    protected void onResume() {
+        super.onResume();
+        addUiObserver(roomMainViewModel);
     }
 
     @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();
+    protected void onPause() {
+        super.onPause();
+        removeUiObserver(roomMainViewModel);
     }
 }