diff --git a/app/src/main/java/com/example/cosmosclient/views/JoinGroupByIDActivity.java b/app/src/main/java/com/example/cosmosclient/views/JoinGroupByIDActivity.java
index 01e1154..c26ce72 100644
--- a/app/src/main/java/com/example/cosmosclient/views/JoinGroupByIDActivity.java
+++ b/app/src/main/java/com/example/cosmosclient/views/JoinGroupByIDActivity.java
@@ -1,14 +1,24 @@
 package com.example.cosmosclient.views;
 
+import android.content.Intent;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import com.example.cosmosclient.R;
-import com.example.cosmosclient.entities.ToJoinGroupRetrofitMethods;
+import com.example.cosmosclient.app.Cosmos;
+import com.example.cosmosclient.entities.JoinGroupResponse;
+import com.example.cosmosclient.resources.JoinGroupRest;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+import retrofit2.Retrofit;
+import retrofit2.converter.jackson.JacksonConverterFactory;
 
 public class JoinGroupByIDActivity extends AppCompatActivity {
     private String GroupID=null;
@@ -27,8 +37,60 @@
                 EditText inputGroupID = (EditText)findViewById(R.id.inputGroupID);
                 GroupID = inputGroupID.getText().toString();
                 result.setText(GroupID);
-                ToJoinGroupRetrofitMethods retr= new ToJoinGroupRetrofitMethods();
-                String res=retr.runRetrofit();
+                //retrofitの処理
+                Retrofit retrofit = new Retrofit.Builder()
+                        .baseUrl("http://nitta-lab-www.is.konan-u.ac.jp/cosmos/")
+                        .addConverterFactory(JacksonConverterFactory.create())
+                        .build();
+                //interfaceから実装を取得
+                JoinGroupRest joinGroupService = retrofit.create(JoinGroupRest.class);
+
+                String gid="dnjewvhoirae";
+                String uid="dnjewvhfgoirae";
+                String token="dnjewvhoidgfrae";
+                //API呼び出しのための値入力
+                Call<JoinGroupResponse> call = joinGroupService.JoinGroup(gid, uid, token);
+
+                //サーバからデータ受け取り
+                call.enqueue(new Callback<JoinGroupResponse>() {
+                    //成功時
+                    @Override
+                    public void onResponse(Call<JoinGroupResponse> call, Response<JoinGroupResponse> response) {
+                        JoinGroupResponse result = response.body();
+                        System.out.println(result);
+
+                        if (response.isSuccessful()) {
+                       //     JoinGroupResponse result = response.body();
+
+                            Cosmos app = (Cosmos) getApplication();
+                            Intent intent = new Intent(getApplication(), GroupListActivity.class);
+
+                            //test
+//                            System.out.println(result.uId);
+//                            System.out.println(result.name);
+//                            System.out.println(result.uri);
+//                            System.out.println(result.token);
+//                            System.out.println(result.iconUri);
+//                            System.out.println(result.pw);
+
+                            //ここで成功の処理を記述
+                            finish();
+
+                        } else {
+                            //onFailureでキャッチできないエラー用
+                            //ここでエラーの処理を記述
+                        }
+                    }
+
+
+                    //失敗時
+                    @Override
+                    public void onFailure(Call<JoinGroupResponse> call, Throwable t) {
+                        t.printStackTrace();
+                        Toast.makeText(JoinGroupByIDActivity.this,
+                                "アカウント作成失敗",Toast.LENGTH_SHORT);
+                    }
+                });
             }
         });
     }