diff --git a/app/src/main/java/com/example/cosmosclient/entities/GroupListResponse.java b/app/src/main/java/com/example/cosmosclient/entities/GroupListResponse.java
new file mode 100644
index 0000000..8d0e0cc
--- /dev/null
+++ b/app/src/main/java/com/example/cosmosclient/entities/GroupListResponse.java
@@ -0,0 +1,45 @@
+package com.example.cosmosclient.entities;
+
+import java.util.List;
+
+public class GroupListResponse {
+
+    private List<Group> group;
+
+    public GroupListResponse() {
+
+    }
+
+    public GroupListResponse(List<Group> group) {
+        this.group = group;
+    }
+
+    public List<Group> getGroup() {
+        return group;
+    }
+
+    public void setGroup(List<Group> group) {
+        this.group = group;
+    }
+
+    public void addGroup(Group g) {
+        group.add(g);
+    }
+
+    public Group getGroup(int index) {
+        return group.get(index);
+    }
+
+    public void clearGroup() {
+        group.clear();
+    }
+
+    public void removeGroup(int index) {
+        group.remove(index);
+    }
+
+    public int getGroupCount() {
+        return group.size();
+    }
+
+}
diff --git a/app/src/main/java/com/example/cosmosclient/resources/GroupsRest.java b/app/src/main/java/com/example/cosmosclient/resources/GroupsRest.java
index 47e300f..1e62250 100644
--- a/app/src/main/java/com/example/cosmosclient/resources/GroupsRest.java
+++ b/app/src/main/java/com/example/cosmosclient/resources/GroupsRest.java
@@ -3,6 +3,7 @@
 import com.example.cosmosclient.entities.AddRequestsResponse;
 import com.example.cosmosclient.entities.CreateGroupResponse;
 import com.example.cosmosclient.entities.Group;
+import com.example.cosmosclient.entities.GroupListResponse;
 import com.example.cosmosclient.entities.MemberListResponse;
 import com.example.cosmosclient.entities.Request;
 import com.example.cosmosclient.entities.Requests;
@@ -23,7 +24,7 @@
 
 public interface GroupsRest {
     @GET("groups")
-    Call<Group> getGroups(@Field("uId") String uId, @Field("token") String token);
+    Call<GroupListResponse> getGroups(@Query("uId") String uId, @Query("token") String token);
 
     @POST("groups")
     @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 d604bfd..2e1d065 100644
--- a/app/src/main/java/com/example/cosmosclient/views/GroupListActivity.java
+++ b/app/src/main/java/com/example/cosmosclient/views/GroupListActivity.java
@@ -1,8 +1,11 @@
 package com.example.cosmosclient.views;
 
 import android.content.Intent;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
 import android.nfc.Tag;
 import android.os.Bundle;
+import android.util.Base64;
 import android.util.Log;
 import android.view.View;
 import android.support.v4.view.GravityCompat;
@@ -16,20 +19,27 @@
 import android.view.Menu;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
+import android.widget.BaseAdapter;
 import android.widget.GridView;
 import android.widget.ListAdapter;
 import android.widget.TextView;
 import android.widget.Toast;
 
 import com.example.cosmosclient.app.Cosmos;
+import com.example.cosmosclient.entities.Group;
+import com.example.cosmosclient.entities.GroupListResponse;
+import com.example.cosmosclient.entities.MemberListResponse;
 import com.example.cosmosclient.views.DynamicGridView;
 import com.example.cosmosclient.resources.GroupsRest;
 import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
 import retrofit2.Retrofit;
 import retrofit2.converter.jackson.JacksonConverterFactory;
 
 import com.example.cosmosclient.R;
 
+import java.io.ByteArrayOutputStream;
 import java.util.ArrayList;
 import java.util.Arrays;
 
@@ -55,7 +65,6 @@
         //ユーザ名とユーザIDを表示したい
         final String uName;
         uName = "hogehoge";
-        //Call
         NavigationView navView = (NavigationView) findViewById(R.id.nav_view);
         View headerView = navView.getHeaderView(0);
         TextView userNameTextView = navView.getHeaderView(0).findViewById(R.id.userName);
@@ -72,9 +81,68 @@
         //interfaceから実装を取得
         final GroupsRest getGroupsService = retrofit.create(GroupsRest.class);
 
+        //API呼び出しのための値入力
+        final Call<GroupListResponse> call = getGroupsService.getGroups(uId,token);
+
+        //サーバからデータ受け取り
+        call.enqueue(new Callback<GroupListResponse>() {
+            //成功時
+            @Override
+            public void onResponse(Call<GroupListResponse> call, Response<GroupListResponse> response) {
+                if (response.isSuccessful()) {
+                    GroupListResponse result = response.body();
+//                    Iterator<User> it = result.member.iterator();
+//                    int i = 0;
+
+                    //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);
+
+
+
+                    //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_SHORT).show();
+                }
+            }
+
+            //失敗時
+            @Override
+            public void onFailure(Call<GroupListResponse> call, Throwable t) {
+                t.printStackTrace();
+                Toast.makeText(GroupListActivity.this,
+                        "グループ情報取得失敗", Toast.LENGTH_SHORT).show();
+            }
+        });
+
         //String[] list = {"ファミリー\n  紙コップ\n  延長ケーブル", "Group2\n  からし", "Group3\n  ケーキ\n  something"};
 
         gridView = (DynamicGridView) findViewById(R.id.dynamic_grid);
+
+        // グループ名一覧の表示
         gridView.setAdapter((ListAdapter) new CheeseDynamicAdapter(this,
                 new ArrayList<String>(Arrays.asList(Cheeses.sCheeseStrings)),
                 getResources().getInteger(R.integer.column_count)));
diff --git a/app/src/main/java/com/example/cosmosclient/views/MemberListAdapter.java b/app/src/main/java/com/example/cosmosclient/views/MemberListAdapter.java
index c532a6c..42e1f48 100644
--- a/app/src/main/java/com/example/cosmosclient/views/MemberListAdapter.java
+++ b/app/src/main/java/com/example/cosmosclient/views/MemberListAdapter.java
@@ -66,7 +66,7 @@
             convertView = inflater.inflate(itemLayoutId, parent, false);
             // ViewHolder を生成
             holder = new MemberListAdapter.ViewHolder();
-            holder.textView = convertView.findViewById(R.id.textView);
+            holder.textView = convertView.findViewById(R.id.userID);
             holder.imageView = convertView.findViewById(R.id.imageView);
             convertView.setTag(holder);
         }