diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index e83b75f..1de6c3b 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -70,8 +70,9 @@
             android:label="メンバー追加" />
         <activity
             android:name=".views.GroupListActivity"
-            android:label="@string/title_activity_group_list"
-            android:theme="@style/AppTheme.NoActionBar"></activity>
+            android:label="グループ一覧"
+            android:theme="@style/AppTheme.NoActionBar">
+        </activity>
     </application>
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
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..9af528b
--- /dev/null
+++ b/app/src/main/java/com/example/cosmosclient/entities/GroupListResponse.java
@@ -0,0 +1,48 @@
+package com.example.cosmosclient.entities;
+
+import com.example.cosmosclient.entities.jsons.GroupJson;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+
+import java.util.List;
+//@JsonIgnoreProperties(ignoreUnknown = true)
+
+public class GroupListResponse {
+    private List<GroupJson> groups;
+
+    public GroupListResponse() {
+
+    }
+
+    public GroupListResponse(List<GroupJson> groups) {
+        this.groups = groups;
+    }
+
+    public List<GroupJson> getGroups() {
+        return groups;
+    }
+
+    public void setGroups(List<GroupJson> groups) {
+        this.groups = groups;
+    }
+
+    public void addGroup(GroupJson g) {
+        groups.add(g);
+    }
+
+    public GroupJson getGroup(int index) {
+        return groups.get(index);
+    }
+
+    public void clearGroup() {
+        groups.clear();
+    }
+
+    public void removeGroup(int index) {
+        groups.remove(index);
+    }
+
+    public int getGroupCount() {
+        return groups.size();
+    }
+
+}
diff --git a/app/src/main/java/com/example/cosmosclient/entities/jsons/GroupJson.java b/app/src/main/java/com/example/cosmosclient/entities/jsons/GroupJson.java
new file mode 100644
index 0000000..9264728
--- /dev/null
+++ b/app/src/main/java/com/example/cosmosclient/entities/jsons/GroupJson.java
@@ -0,0 +1,35 @@
+package com.example.cosmosclient.entities.jsons;
+
+public class GroupJson {
+    private String name;
+    private String gId;
+    private String uri;
+
+    public String getgId() {
+        return gId;
+    }
+
+    public void setgId(String gId) {
+        this.gId = gId;
+    }
+
+    public String getUri() {
+        return uri;
+    }
+
+    public void setUri(String uri){
+        this.uri = uri;
+    }
+
+    public void setName(String name){
+        this.name = name;
+    }
+
+    public String getName(){
+        return name;
+    }
+
+    public String toString() {
+       return name;
+    }
+}
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 adfd574..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;
@@ -22,6 +23,9 @@
 
 
 public interface GroupsRest {
+    @GET("groups")
+    Call<GroupListResponse> getGroups(@Query("uId") String uId, @Query("token") String token);
+
     @POST("groups")
     @FormUrlEncoded
     Call<CreateGroupResponse> createGroup(@Field("name") String name, @Field("uId") String uId, @Field("token") String token);
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 608b4f8..b05522c 100644
--- a/app/src/main/java/com/example/cosmosclient/resources/UsersRest.java
+++ b/app/src/main/java/com/example/cosmosclient/resources/UsersRest.java
@@ -2,10 +2,12 @@
 
 import com.example.cosmosclient.entities.SigninResponse;
 import com.example.cosmosclient.entities.SignupResponse;
+import com.example.cosmosclient.entities.User;
 
 import retrofit2.Call;
 import retrofit2.http.Field;
 import retrofit2.http.FormUrlEncoded;
+import retrofit2.http.GET;
 import retrofit2.http.POST;
 import retrofit2.http.Path;
 import retrofit2.http.Query;
@@ -15,6 +17,9 @@
     @FormUrlEncoded
     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);
+
     @POST("users")
     @FormUrlEncoded
     Call<SignupResponse> createUser(@Field("name") String name, @Field("pw") String pw, @Field("iconImage") String icon_image);
diff --git a/app/src/main/java/com/example/cosmosclient/views/CheeseDynamicAdapter.java b/app/src/main/java/com/example/cosmosclient/views/CheeseDynamicAdapter.java
index b2e17db..f6131ad 100644
--- a/app/src/main/java/com/example/cosmosclient/views/CheeseDynamicAdapter.java
+++ b/app/src/main/java/com/example/cosmosclient/views/CheeseDynamicAdapter.java
@@ -7,6 +7,7 @@
 import android.view.ViewGroup;
 import android.widget.ArrayAdapter;
 import android.widget.ImageView;
+import android.widget.LinearLayout;
 import android.widget.ListView;
 import android.widget.TextView;
 
@@ -69,12 +70,13 @@
             itemList = (ListView) view.findViewById(R.id.listview);
             //image = (ImageView) view.findViewById(R.id.item_img);
 
+            /*
             ArrayList<String> items = new ArrayList<>();
             items.add("からし");
             items.add("わさび");
             items.add("砂糖");
- 
-            ArrayAdapter<String> adapter = new ArrayAdapter<String>(getContext(), R.layout.item_list, items);
+            */
+            //ArrayAdapter<String> adapter = new ArrayAdapter<String>(getContext(), R.layout.item_list, items);
             //itemList.setAdapter(adapter);
         }
 
diff --git a/app/src/main/java/com/example/cosmosclient/views/Cheeses.java b/app/src/main/java/com/example/cosmosclient/views/Cheeses.java
index a1386ac..d02cdc2 100644
--- a/app/src/main/java/com/example/cosmosclient/views/Cheeses.java
+++ b/app/src/main/java/com/example/cosmosclient/views/Cheeses.java
@@ -1,13 +1,16 @@
 package com.example.cosmosclient.views;
 
+import com.example.cosmosclient.resources.GroupsRest;
+import retrofit2.Call;
+
 public class Cheeses {
     public static final String[] sCheeseStrings = {
-            "ファミリー\n  紙コップ\n  延長ケーブル",
-            "会社\n  からし",
-            "Group3\n  ケーキ\n  ほげほげ",
-            "Group4\n  ほげほげ\n  ほげほげ",
-            "Group5\n  ほげほげ\n  ほげほげ\n  ほげほげ\n  ほげほげ",
-            "Group6\n  ほげほげ\n  ほげほげ\n  ほげほげ",
+            "ファミリー",
+            "会社",
+            "Group3",
+            "Group4",
+            "Group5",
+            "Group6",
             "Group7"
     };
 }
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 22b50ec..16bd164 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;
@@ -16,15 +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;
 
@@ -33,6 +48,7 @@
 
     private static final String TAG = GroupListActivity.class.getName();
     private DynamicGridView gridView;
+    GroupListResponse result;
 
 
     @Override
@@ -42,12 +58,101 @@
         Toolbar toolbar = findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
 
-        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"};
+        final String uId,token;
+        Cosmos app = (Cosmos) getApplication();
+        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/")
+                .addConverterFactory(JacksonConverterFactory.create())
+                .build();
+        //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 result2 = response.body();
+                    result = result2;
+//                    Iterator<User> it = result.member.iterator();
+//                    int i = 0;
+                    for (int i = 0; i < result.getGroupCount(); i++) {
+                        groupList.add(result.getGroup(i).getName());
+                    }
+
+                    // グループ名一覧の表示
+                    gridView.setAdapter((ListAdapter) new CheeseDynamicAdapter(GroupListActivity.this,
+                            result.getGroups(),
+                            getResources().getInteger(R.integer.column_count)));
+
+                    //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<GroupListResponse> call, Throwable t) {
+                t.printStackTrace();
+                Toast.makeText(GroupListActivity.this,
+                        "グループ情報取得失敗", Toast.LENGTH_SHORT).show();
+            }
+        });
+
+//        ArrayList<String> GroupList = new ArrayList<>();
+//        for (int i = 0; i < result.getGroupCount(); i++) {
+//            GroupList.add(result.getGroup(i).getName());
+//        }
         gridView = (DynamicGridView) findViewById(R.id.dynamic_grid);
-        gridView.setAdapter((ListAdapter) new CheeseDynamicAdapter(this,
-                new ArrayList<String>(Arrays.asList(Cheeses.sCheeseStrings)),
-                getResources().getInteger(R.integer.column_count)));
 
         gridView.setOnDragListener(new DynamicGridView.OnDragListener() {
                 @Override
@@ -81,15 +186,15 @@
         });
 
         /* とりあえずの画面遷移なので変更するかも */
-        TextView group1 = findViewById(R.id.group1);
-        group1.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                gridView.stopEditMode();
-                Intent intent=new Intent(GroupListActivity.this, com.example.cosmosclient.views.RequestListActivity.class);
-                startActivity(intent);
-            }
-        });
+//        TextView group1 = findViewById(R.id.group1);
+//        group1.setOnClickListener(new View.OnClickListener() {
+//            @Override
+//            public void onClick(View view) {
+//                gridView.stopEditMode();
+//                Intent intent=new Intent(GroupListActivity.this, com.example.cosmosclient.views.RequestListActivity.class);
+//                startActivity(intent);
+//            }
+//        });
 
 
         DrawerLayout drawer = findViewById(R.id.drawer_layout);
@@ -172,5 +277,7 @@
         DrawerLayout drawer = findViewById(R.id.drawer_layout);
         drawer.closeDrawer(GravityCompat.START);
         return true;
+
+
     }
 }
diff --git a/app/src/main/java/com/example/cosmosclient/views/ListViewAdapter.java b/app/src/main/java/com/example/cosmosclient/views/ListViewAdapter.java
index 99f0054..64113fa 100644
--- a/app/src/main/java/com/example/cosmosclient/views/ListViewAdapter.java
+++ b/app/src/main/java/com/example/cosmosclient/views/ListViewAdapter.java
@@ -42,7 +42,7 @@
             convertView = inflater.inflate(itemLayoutId, parent, false);
             // ViewHolder を生成
             holder = new 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);
         }
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);
         }
diff --git a/app/src/main/res/layout/item_grid.xml b/app/src/main/res/layout/item_grid.xml
index 829341c..4fc0f67 100644
--- a/app/src/main/res/layout/item_grid.xml
+++ b/app/src/main/res/layout/item_grid.xml
@@ -2,6 +2,7 @@
 
 <LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/wrapper"
     android:layout_height="wrap_content"
     android:layout_width="wrap_content"
     android:gravity="center"
@@ -27,7 +28,7 @@
     <ListView
         android:id="@id/listview"
         android:layout_width="match_parent"
-        android:layout_height="wrap_content"
+        android:layout_height="match_parent"
         />
  
 </LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/item_list.xml b/app/src/main/res/layout/item_list.xml
index 21d5116..5037c41 100644
--- a/app/src/main/res/layout/item_list.xml
+++ b/app/src/main/res/layout/item_list.xml
@@ -2,11 +2,10 @@
 <TextView xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:minHeight="30dp"
+    android:minHeight="3sp"
     android:paddingStart="20dp"
     android:paddingEnd="5dp"
     android:paddingLeft="40dp"
     android:paddingRight="5dp"
     >
- 
 </TextView>
\ No newline at end of file
diff --git a/app/src/main/res/layout/list.xml b/app/src/main/res/layout/list.xml
index f7142e2..5bb4578 100644
--- a/app/src/main/res/layout/list.xml
+++ b/app/src/main/res/layout/list.xml
@@ -15,7 +15,7 @@
         android:contentDescription="picture"/>
 
     <TextView
-        android:id="@+id/textView"
+        android:id="@+id/userID"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
diff --git a/app/src/main/res/layout/nav_header_group_list.xml b/app/src/main/res/layout/nav_header_group_list.xml
index 4c3439a..649c531 100644
--- a/app/src/main/res/layout/nav_header_group_list.xml
+++ b/app/src/main/res/layout/nav_header_group_list.xml
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/nav_view"
     android:layout_width="match_parent"
     android:layout_height="@dimen/nav_header_height"
     android:background="@drawable/side_nav_bar"
@@ -21,6 +22,7 @@
         app:srcCompat="@mipmap/ic_launcher_round" />
 
     <TextView
+        android:id="@+id/userName"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingTop="@dimen/nav_header_vertical_spacing"
@@ -28,7 +30,7 @@
         android:textAppearance="@style/TextAppearance.AppCompat.Body1" />
 
     <TextView
-        android:id="@+id/textView"
+        android:id="@+id/userID"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="@string/nav_header_subtitle" />