diff --git a/app/src/main/java/com/example/cosmosclient/app/Cosmos.java b/app/src/main/java/com/example/cosmosclient/app/Cosmos.java
index ac5e45a..d050520 100644
--- a/app/src/main/java/com/example/cosmosclient/app/Cosmos.java
+++ b/app/src/main/java/com/example/cosmosclient/app/Cosmos.java
@@ -9,6 +9,7 @@
 import com.example.cosmosclient.entities.Group;
 import android.content.SharedPreferences;
 
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
 
@@ -18,6 +19,7 @@
     private HashMap<String, Group> groups = new HashMap<>();
     private String uId=null;
     private HashMap<Integer, AreaInformation> areaInfo = new HashMap<>();
+    private ArrayList<Integer> areaInfoKey= new ArrayList<>();
     private String TAG = Cosmos.class.getSimpleName();
 
     public Cosmos() {
@@ -153,4 +155,11 @@
         return areaInfo.get(areaId);
     }
 
+    public ArrayList<Integer> AreaInfoGetKey(){
+        for(int key : areaInfo.keySet()){
+            areaInfoKey.add(key);
+        }
+        return areaInfoKey;
+    }
+
 }