diff --git a/app/src/main/java/com/example/sprout/refactor/activity/RoomInputKeyActivity.java b/app/src/main/java/com/example/sprout/refactor/activity/RoomInputKeyActivity.java
index 115f5a1..58dfaa8 100644
--- a/app/src/main/java/com/example/sprout/refactor/activity/RoomInputKeyActivity.java
+++ b/app/src/main/java/com/example/sprout/refactor/activity/RoomInputKeyActivity.java
@@ -1,14 +1,10 @@
 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.RfActivityRoomInputKeyBinding;
-import com.example.sprout.refactor.common.ActivityEvent;
 import com.example.sprout.refactor.contract.ViewContract;
 import com.example.sprout.refactor.viewmodel.RoomInputKeyViewModel;
 
@@ -17,7 +13,7 @@
  *
  * @author matsumoto_k
  */
-public class RoomInputKeyActivity extends AppCompatActivity implements ViewContract {
+public class RoomInputKeyActivity extends BaseActivity {
 
     private RfActivityRoomInputKeyBinding binding = null;
     private RoomInputKeyViewModel roomInputKeyViewModel = null;
@@ -26,32 +22,20 @@
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         binding = DataBindingUtil.setContentView(this, R.layout.rf_activity_room_input_key);
-        roomInputKeyViewModel = new RoomInputKeyViewModel((ViewContract) this);
+        roomInputKeyViewModel = new RoomInputKeyViewModel();
         binding.setViewModel(roomInputKeyViewModel);
         getLifecycle().addObserver(roomInputKeyViewModel);
     }
 
     @Override
-    public void startActivity(ActivityEvent event) {
-        switch (event) {
-            case ROOM_MAIN:
-                startActivity(new Intent(RoomInputKeyActivity.this, RoomMainActivity.class));
-                break;
-        }
+    protected void onResume() {
+        super.onResume();
+        addUiObserver(roomInputKeyViewModel);
     }
 
     @Override
-    public void finishActivity() {
-        finish();
-    }
-
-    @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(roomInputKeyViewModel);
     }
 }