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 632820b..edef7b9 100644
--- a/app/src/main/java/com/example/cosmosclient/app/Cosmos.java
+++ b/app/src/main/java/com/example/cosmosclient/app/Cosmos.java
@@ -4,9 +4,12 @@
 
 import com.example.cosmosclient.entities.Group;
 
+import java.util.HashMap;
+
 public class Cosmos extends Application {
     private String token=null;
     private Group curGroup=null;
+    private HashMap<String, Group> groups = new HashMap<>();
     private String uId=null;
 
     //token処理
@@ -18,6 +21,7 @@
     }
 
     //Group処理
+    //再考
     public void setCurrentGroup(Group g){
         curGroup = g;
     }
@@ -25,6 +29,16 @@
         return curGroup;
     }
 
+    public void setGroup(Group g) {
+        if(groups.get(g.getgId()) == null) {
+            String newGid = g.getgId();
+            groups.put(newGid, g);
+        }
+    }
+    public Group getGroup(String gId) {
+        return groups.get(gId);
+    }
+
     //uId処理
     public void setuId(String uId){
         this.uId = uId;