diff --git a/app/src/main/java/com/example/cosmosclient/entities/UserResponse.java b/app/src/main/java/com/example/cosmosclient/entities/UserResponse.java
new file mode 100644
index 0000000..28cb151
--- /dev/null
+++ b/app/src/main/java/com/example/cosmosclient/entities/UserResponse.java
@@ -0,0 +1,6 @@
+package com.example.cosmosclient.entities;
+
+public class UserResponse {
+    public String name;
+    public String iconUri;
+}
diff --git a/app/src/main/java/com/example/cosmosclient/resources/UsersRest.java b/app/src/main/java/com/example/cosmosclient/resources/UsersRest.java
index b05522c..55e6651 100644
--- a/app/src/main/java/com/example/cosmosclient/resources/UsersRest.java
+++ b/app/src/main/java/com/example/cosmosclient/resources/UsersRest.java
@@ -2,7 +2,7 @@
 
 import com.example.cosmosclient.entities.SigninResponse;
 import com.example.cosmosclient.entities.SignupResponse;
-import com.example.cosmosclient.entities.User;
+import com.example.cosmosclient.entities.UserResponse;
 
 import retrofit2.Call;
 import retrofit2.http.Field;
@@ -18,7 +18,7 @@
     Call<SigninResponse> login(@Path("uId") String uId,@Field("pw") String pw);
 
     @GET("users/{uId}")
-    Call<User> getName(@Path("uId") String uId, @Field("token") String token);
+    Call<UserResponse> getName(@Path("uId") String uId, @Query("token") String token);
 
     @POST("users")
     @FormUrlEncoded
diff --git a/app/src/main/java/com/example/cosmosclient/views/GroupListActivity.java b/app/src/main/java/com/example/cosmosclient/views/GroupListActivity.java
index 0efdd18..8f225e6 100644
--- a/app/src/main/java/com/example/cosmosclient/views/GroupListActivity.java
+++ b/app/src/main/java/com/example/cosmosclient/views/GroupListActivity.java
@@ -30,7 +30,10 @@
 import com.example.cosmosclient.entities.Group;
 import com.example.cosmosclient.entities.GroupListResponse;
 import com.example.cosmosclient.entities.MemberListResponse;
+import com.example.cosmosclient.entities.User;
+import com.example.cosmosclient.entities.UserResponse;
 import com.example.cosmosclient.entities.jsons.GroupJson;
+import com.example.cosmosclient.resources.UsersRest;
 import com.example.cosmosclient.views.DynamicGridView;
 import com.example.cosmosclient.resources.GroupsRest;
 import retrofit2.Call;
@@ -59,10 +62,85 @@
         setContentView(R.layout.activity_group_list);
         Toolbar toolbar = findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
+        final String uId,token;
+        final Cosmos app = (Cosmos) getApplication();
+        uId = app.getuId();
+        token = app.getToken();
 
 
 
 
+        //retrofitの処理
+        final Retrofit retrofit = new Retrofit.Builder()
+                .baseUrl("http://nitta-lab-www.is.konan-u.ac.jp/cosmos/")
+                .addConverterFactory(JacksonConverterFactory.create())
+                .build();
+
+        final UsersRest getUsersService = retrofit.create(UsersRest.class);
+        //APIに値を送信
+        Call<UserResponse> call = getUsersService.getName(uId,token);
+        //サーバからデータ受け取り
+        call.enqueue(new Callback<UserResponse>() {
+            //成功時
+            @Override
+            public void onResponse(Call<UserResponse> call, Response<UserResponse> response) {
+                if (response.isSuccessful()) {
+                    UserResponse result = response.body();
+
+                    //ユーザ名とユーザIDを表示したい
+                    NavigationView navView = (NavigationView) findViewById(R.id.nav_view);
+                    View headerView = navView.getHeaderView(0);
+                    TextView userNameTextView = navView.getHeaderView(0).findViewById(R.id.userName);
+                    TextView userIDTextView = navView.getHeaderView(0).findViewById(R.id.userID);
+                    userIDTextView.setText("ユーザID："+uId);
+                    final String uName;
+                    uName = result.name;
+                    userNameTextView.setText("ユーザ名："+uName);
+
+
+                    //画像をBase64に変換
+                    Bitmap icon = BitmapFactory.decodeResource(getResources(),R.drawable.default_icon_image);
+                    ByteArrayOutputStream baos = new ByteArrayOutputStream();
+                    icon.compress(Bitmap.CompressFormat.JPEG,100, baos);
+                    byte[] b = baos.toByteArray();
+                    String imageEncoded = Base64.encodeToString(b, Base64.DEFAULT);
+//                    Toast.makeText(GroupListActivity.this,"接続できたよ",Toast.LENGTH_LONG).show();
+
+
+                    //アイコンが未設定ならデフォルト画像を設定
+//                    for(int i = 0; i<result.member.size(); i++){
+//                        userName.add(result.member.get(i).name);
+//                        if(result.member.get(i).iconUri != null) {
+//                            userIcon.add(result.member.get(i).iconUri);
+//                        }else{
+//                            userIcon.add(String.valueOf(imageEncoded));
+//                        }
+//                    }
+
+                    // BaseAdapter を継承したadapterのインスタンスを生成
+                    // レイアウトファイル list.xml を activity_main.xml に
+                    //inflate するためにadapterに引数として渡す
+//                    BaseAdapter adapter = new MemberListAdapter(MemberListActivity.this,
+//                            R.layout.list,userName,userIcon);
+//
+//                    // ListViewにadapterをセット
+//                    listView.setAdapter(adapter);
+
+                } else {
+                    //onFailureでキャッチできないエラー用
+                    Toast.makeText(GroupListActivity.this,
+                            "通信エラー", Toast.LENGTH_LONG).show();
+                }
+            }
+
+            //失敗時
+            @Override
+            public void onFailure(Call<UserResponse> call, Throwable t) {
+                t.printStackTrace();
+                Toast.makeText(GroupListActivity.this,
+                        "ユーザー情報取得失敗", Toast.LENGTH_SHORT).show();
+            }
+        });
 
 //        ArrayList<String> GroupList = new ArrayList<>();
 //        for (int i = 0; i < result.getGroupCount(); i++) {
@@ -134,16 +212,6 @@
         uId = app.getuId();
         token = app.getToken();
 
-        //ユーザ名とユーザIDを表示したい
-        final String uName;
-        uName = "hogehoge";
-        NavigationView navView = (NavigationView) findViewById(R.id.nav_view);
-        View headerView = navView.getHeaderView(0);
-        TextView userNameTextView = navView.getHeaderView(0).findViewById(R.id.userName);
-        TextView userIDTextView = navView.getHeaderView(0).findViewById(R.id.userID);
-        userNameTextView.setText("ユーザ名："+uName);
-        userIDTextView.setText("ユーザID："+uId);
-        final ArrayList<String> groupList = new ArrayList<>();
         //retrofitの処理
         final Retrofit retrofit = new Retrofit.Builder()
                 .baseUrl("http://nitta-lab-www.is.konan-u.ac.jp/cosmos/")