diff --git a/app/src/main/java/org/ntlab/radishforandroidstudio/cactusClient/Cactus.java b/app/src/main/java/org/ntlab/radishforandroidstudio/cactusClient/Cactus.java
index 751da75..6fd5f59 100644
--- a/app/src/main/java/org/ntlab/radishforandroidstudio/cactusClient/Cactus.java
+++ b/app/src/main/java/org/ntlab/radishforandroidstudio/cactusClient/Cactus.java
@@ -1,11 +1,14 @@
 package org.ntlab.radishforandroidstudio.cactusClient;
 
 import android.app.Activity;
+import android.app.ActivityManager;
 import android.app.Application;
 import android.os.Bundle;
 
 import org.ntlab.radishforandroidstudio.cactusClient.models.Account;
 
+import java.util.List;
+
 public class Cactus extends Application {
 
     private Account myAccount = null;
@@ -15,12 +18,20 @@
         registerActivityLifecycleCallbacks(new ActivityLifecycleCallbacks() {
             @Override
             public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
+                ActivityManager activityManager = ((ActivityManager) getSystemService(ACTIVITY_SERVICE));
+                List<ActivityManager.RunningTaskInfo> taskInfo = activityManager.getRunningTasks(5);
+                int activity_num = taskInfo.get(0).numRunning;
+                if (activity_num <= 1) {
+                    // loadの処理
+
+                }
 
             }
 
             @Override
             public void onActivityStarted(Activity activity) {
 
+
             }
 
             @Override
@@ -35,6 +46,13 @@
 
             @Override
             public void onActivityStopped(Activity activity) {
+                ActivityManager activityManager = ((ActivityManager) getSystemService(ACTIVITY_SERVICE));
+                List<ActivityManager.RunningTaskInfo> taskInfo = activityManager.getRunningTasks(5);
+                int activity_num = taskInfo.get(0).numRunning;
+                if (activity_num <= 1) {
+                    // saveの処理
+
+                }
 
             }
 
@@ -54,14 +72,13 @@
 
     public Account getMyAccount(){
 
-        return null;
+        return myAccount;
     }
 
-    public Account setMyAccount(Account ac){
-
-        return ac;
+    public void setMyAccount(Account ac){
+        myAccount = ac;
     }
-    
+
 }