diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index b0b93df..b5ad990 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -5,17 +5,18 @@
     <!-- ここからバーコードリーダーのアクセス許可 -->
     <application
         android:name=".app.Cosmos"
+        android:networkSecurityConfig="@xml/network_security_config"
         android:allowBackup="true"
         android:hardwareAccelerated="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
-        android:networkSecurityConfig="@xml/network_security_config"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
         <activity
             android:name=".views.DisplayGroupIDActivity"
             android:label="グループIDを表示する" />
+        <activity android:name=".views.MemberListActivity"></activity>
         <activity
             android:name=".views.CreateGroupActivity"
             android:label="グループ作成" />
diff --git a/app/src/main/java/com/example/cosmosclient/entities/MemberListResponse.java b/app/src/main/java/com/example/cosmosclient/entities/MemberListResponse.java
new file mode 100644
index 0000000..6606c3b
--- /dev/null
+++ b/app/src/main/java/com/example/cosmosclient/entities/MemberListResponse.java
@@ -0,0 +1,10 @@
+package com.example.cosmosclient.entities;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.Set;
+
+public class MemberListResponse {
+    public ArrayList<User> member = new ArrayList<>();
+
+}
diff --git a/app/src/main/java/com/example/cosmosclient/entities/SigninResponse.java b/app/src/main/java/com/example/cosmosclient/entities/SigninResponse.java
index 8600404..53700f8 100644
--- a/app/src/main/java/com/example/cosmosclient/entities/SigninResponse.java
+++ b/app/src/main/java/com/example/cosmosclient/entities/SigninResponse.java
@@ -2,5 +2,5 @@
 
 public class SigninResponse {
     public String token;
-    public String uId;
+//    public String uId;
 }
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 70b976e..adfd574 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.MemberListResponse;
 import com.example.cosmosclient.entities.Request;
 import com.example.cosmosclient.entities.Requests;
 import com.example.cosmosclient.entities.User;
@@ -39,4 +40,7 @@
 //    @GET("{gId}/requests/{rId}")
 //    Call<Request> getRequestsDetailByGidAndRid(@Path("gid") String gid, @Path("rid") String rid, @Query("token") String token);
 
+    @GET("groups/{gId}/members")
+    Call<MemberListResponse> getMemberListByGid(@Path("gId") String gId, @Query("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 205b4a2..608b4f8 100644
--- a/app/src/main/java/com/example/cosmosclient/resources/UsersRest.java
+++ b/app/src/main/java/com/example/cosmosclient/resources/UsersRest.java
@@ -17,5 +17,5 @@
 
     @POST("users")
     @FormUrlEncoded
-    Call<SignupResponse> createUser(@Field("name") String name, @Field("pw") String pw, @Field("icon-image") String icon_image);
+    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/ListViewAdapter.java b/app/src/main/java/com/example/cosmosclient/views/ListViewAdapter.java
index 31b2691..99f0054 100644
--- a/app/src/main/java/com/example/cosmosclient/views/ListViewAdapter.java
+++ b/app/src/main/java/com/example/cosmosclient/views/ListViewAdapter.java
@@ -10,6 +10,8 @@
 
 import com.example.cosmosclient.R;
 
+import java.util.ArrayList;
+
 public class ListViewAdapter extends BaseAdapter {
     static class ViewHolder {
         TextView textView;
@@ -73,3 +75,5 @@
         return 0;
     }
 }
+
+
diff --git a/app/src/main/java/com/example/cosmosclient/views/MemberListActivity.java b/app/src/main/java/com/example/cosmosclient/views/MemberListActivity.java
new file mode 100644
index 0000000..d2ab01a
--- /dev/null
+++ b/app/src/main/java/com/example/cosmosclient/views/MemberListActivity.java
@@ -0,0 +1,141 @@
+package com.example.cosmosclient.views;
+
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.net.Uri;
+import android.support.design.widget.FloatingActionButton;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.util.Base64;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.BaseAdapter;
+import android.widget.Button;
+import android.widget.ListView;
+import android.widget.Toast;
+
+import com.example.cosmosclient.R;
+import com.example.cosmosclient.app.Cosmos;
+import com.example.cosmosclient.entities.Group;
+import com.example.cosmosclient.entities.MemberListResponse;
+import com.example.cosmosclient.entities.User;
+import com.example.cosmosclient.resources.GroupsRest;
+
+import java.io.ByteArrayOutputStream;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.Set;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+import retrofit2.Retrofit;
+import retrofit2.converter.jackson.JacksonConverterFactory;
+
+public class MemberListActivity extends AppCompatActivity {
+    private int count;
+    private ArrayList<String> userName = new ArrayList<>();
+    private ArrayList<String> userIcon = new ArrayList<>();
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_member_list);
+
+        //メンバー追加ボタン処理
+        FloatingActionButton fab = findViewById(R.id.addrequest_button);
+        fab.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                startActivity(new Intent(MemberListActivity.this,
+                        AddMemberActivity.class));
+                finish();
+            }
+        });
+
+        //app/CosmosにGETメソッドに必要なデータを取得
+        Cosmos app = (Cosmos) getApplication();
+        final String token = app.getToken();
+        final String gId = app.getCurentGroup().getgId();
+
+        // ListViewのインスタンスを生成
+        final ListView listView = findViewById(R.id.list_view);
+
+        //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 MemberListService = retrofit.create(GroupsRest.class);
+
+        //API呼び出しのための値入力
+        final Call<MemberListResponse> call = MemberListService.getMemberListByGid(gId,token);
+
+        //サーバからデータ受け取り
+        call.enqueue(new Callback<MemberListResponse>() {
+            //成功時
+            @Override
+            public void onResponse(Call<MemberListResponse> call, Response<MemberListResponse> response) {
+                if (response.isSuccessful()) {
+                    MemberListResponse 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);
+
+
+//                    while(it.hasNext()){
+//                        userName.add(it.next().name);
+//                        if(it.next().iconUri != null) {
+//                            userIcon.add(it.next().iconUri);
+//                        }else{
+//                            userIcon.add(String.valueOf(icon));
+//                        }
+//                        i++;
+//                    }
+
+                    //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(MemberListActivity.this,
+                            "通信エラー", Toast.LENGTH_SHORT).show();
+                }
+            }
+
+            //失敗時
+            @Override
+            public void onFailure(Call<MemberListResponse> call, Throwable t) {
+                t.printStackTrace();
+                Toast.makeText(MemberListActivity.this,
+                        "メンバー情報取得失敗", Toast.LENGTH_SHORT).show();
+            }
+        });
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/example/cosmosclient/views/MemberListAdapter.java b/app/src/main/java/com/example/cosmosclient/views/MemberListAdapter.java
new file mode 100644
index 0000000..c532a6c
--- /dev/null
+++ b/app/src/main/java/com/example/cosmosclient/views/MemberListAdapter.java
@@ -0,0 +1,102 @@
+package com.example.cosmosclient.views;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.util.Base64;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.BaseAdapter;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import com.example.cosmosclient.R;
+
+import java.util.ArrayList;
+
+public class MemberListAdapter extends BaseAdapter {
+    static class ViewHolder {
+        TextView textView;
+        ImageView imageView;
+    }
+    private LayoutInflater inflater;
+    private int itemLayoutId;
+
+    private ArrayList<String> memberName = new ArrayList<>();
+    private ArrayList<Bitmap> memberIcon = new ArrayList<>();
+
+    MemberListAdapter(Context context, int itemLayoutId,
+                    ArrayList<String> scenes, ArrayList<String> photos) {
+        super();
+        ArrayList<byte[]> b = new ArrayList<>();
+        Bitmap bitmap;
+        this.inflater = (LayoutInflater)
+                context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        this.itemLayoutId = itemLayoutId;
+
+        for(int i = 0; i<scenes.size(); i++) {
+            this.memberName.add(scenes.get(i));
+
+            //Base64をBitmapにデコード
+            b.add(Base64.decode(photos.get(i),Base64.DEFAULT));
+            bitmap = BitmapFactory.decodeByteArray(b.get(i), 0, b.get(i).length);
+            this.memberIcon.add(bitmap);
+        }
+
+    }
+
+//    MemberListAdapter(Context context, int itemLayoutId,
+//                      ArrayList<String> scenes) {
+//        //アイコン無し動作用
+//        super();
+//        this.inflater = (LayoutInflater)
+//                context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+//        this.itemLayoutId = itemLayoutId;
+//        this.memberName = scenes;
+//    }
+
+
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
+        MemberListAdapter.ViewHolder holder;
+        // 最初だけ View を inflate して、それを再利用する
+        if (convertView == null) {
+            // activity_main.xml に list.xml を inflate して convertView とする
+            convertView = inflater.inflate(itemLayoutId, parent, false);
+            // ViewHolder を生成
+            holder = new MemberListAdapter.ViewHolder();
+            holder.textView = convertView.findViewById(R.id.textView);
+            holder.imageView = convertView.findViewById(R.id.imageView);
+            convertView.setTag(holder);
+        }
+        // holder を使って再利用
+        else {
+            holder = (MemberListAdapter.ViewHolder) convertView.getTag();
+        }
+
+        // holder の imageView にセット
+        holder.imageView.setImageBitmap(memberIcon.get(position));
+        // 現在の position にあるファイル名リストを holder の textView にセット
+        holder.textView.setText(memberName.get(position));
+
+        return convertView;
+    }
+
+    @Override
+    public int getCount() {
+        // texts 配列の要素数
+        return memberName.size();
+    }
+
+    @Override
+    public Object getItem(int position) {
+        return null;
+    }
+
+    @Override
+    public long getItemId(int position) {
+        return 0;
+    }
+
+}
diff --git a/app/src/main/java/com/example/cosmosclient/views/SigninActivity.java b/app/src/main/java/com/example/cosmosclient/views/SigninActivity.java
index dbfd08e..2a70436 100644
--- a/app/src/main/java/com/example/cosmosclient/views/SigninActivity.java
+++ b/app/src/main/java/com/example/cosmosclient/views/SigninActivity.java
@@ -94,7 +94,7 @@
                             //app/Cosmosに情報保存
                             Cosmos app = (Cosmos)getApplication();
                             app.setToken(result.token);
-                            app.setuId(result.uId);
+                            app.setuId(UserIdText.getText().toString());
 
                             //画面遷移
                             Intent intent = new Intent(getApplication(), GroupListActivity.class);
diff --git a/app/src/main/java/com/example/cosmosclient/views/SignupActivity.java b/app/src/main/java/com/example/cosmosclient/views/SignupActivity.java
index 8e5f0b5..5770dcc 100644
--- a/app/src/main/java/com/example/cosmosclient/views/SignupActivity.java
+++ b/app/src/main/java/com/example/cosmosclient/views/SignupActivity.java
@@ -3,8 +3,10 @@
 
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.graphics.Bitmap;
 import android.net.Uri;
 import android.os.Handler;
+import android.provider.MediaStore;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.text.Editable;
@@ -23,6 +25,9 @@
 import com.theartofdev.edmodo.cropper.CropImage;
 import com.theartofdev.edmodo.cropper.CropImageView;
 
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
@@ -35,6 +40,7 @@
     private boolean cpwEnable;
     private Button MakeAccountButton;
     private ImageView iconChoice;
+    private String iconImageBase64;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -91,7 +97,7 @@
 
                 //API呼び出しのための値入力
                 Call<SignupResponse> call = signupService.createUser(NameText.getText().toString(),
-                        PasswordText.getText().toString(), "https://yumenavi.info/live/2018/photo/k/s015980019.jpg");
+                        PasswordText.getText().toString(), iconImageBase64);
 
                 //サーバからデータ受け取り
                 call.enqueue(new Callback<SignupResponse>() {
@@ -169,10 +175,36 @@
             CropImage.ActivityResult result = CropImage.getActivityResult(data);
             if (resultCode == RESULT_OK) {
                 Uri resultUri = result.getUri();
-                iconChoice.setImageURI(resultUri);
+                //画面にトリミングした画像をセット
+                //iconChoice.setImageURI(resultUri);
+
+                try {
+                    //UriからBitmapの取得
+                    Bitmap image = MediaStore.Images.Media.getBitmap(getContentResolver(),resultUri);
+
+                    //画像をBase64に変換
+                    ByteArrayOutputStream baos = new ByteArrayOutputStream();
+                    Bitmap afterResizeBitmap = Bitmap.createScaledBitmap(image,50,50,true);
+                    afterResizeBitmap.compress(Bitmap.CompressFormat.JPEG,70, baos);
+
+                    byte[] b = baos.toByteArray();
+                    String imageEncoded = Base64.encodeToString(b, Base64.DEFAULT);
+
+                    if(imageEncoded.length() <= 2000){
+                        iconChoice.setImageBitmap(image);
+                        iconImageBase64 = imageEncoded;
+                    }else{
+                        Toast.makeText(SignupActivity.this,
+                                "この画像は使用できません。\n別の画像を選択してください。",Toast.LENGTH_LONG).show();
+                    }
+                }catch(IOException e){
+                    e.printStackTrace();
+                }
             } else if (resultCode == CropImage.CROP_IMAGE_ACTIVITY_RESULT_ERROR_CODE) {
                 Exception error = result.getError();
+                error.printStackTrace();
             }
+
         }
     }
 
diff --git a/app/src/main/res/drawable/default_icon_image.png b/app/src/main/res/drawable/default_icon_image.png
new file mode 100644
index 0000000..95c82e7
--- /dev/null
+++ b/app/src/main/res/drawable/default_icon_image.png
Binary files differ
diff --git a/app/src/main/res/layout/activity_member_list.xml b/app/src/main/res/layout/activity_member_list.xml
new file mode 100644
index 0000000..591d3be
--- /dev/null
+++ b/app/src/main/res/layout/activity_member_list.xml
@@ -0,0 +1,116 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".views.AddMemberActivity">
+
+    <android.support.design.widget.FloatingActionButton
+        android:id="@+id/addrequest_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|end"
+        android:layout_margin="@dimen/fab_margin"
+        android:layout_marginStart="350dp"
+        android:layout_marginLeft="350dp"
+        android:layout_marginTop="550dp"
+        android:layout_marginEnd="10dp"
+        android:layout_marginRight="10dp"
+        android:layout_marginBottom="5dp"
+        app:backgroundTint="@android:color/background_light"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="1.0"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="1.0"
+        app:maxImageSize="70dp"
+        app:srcCompat="@android:drawable/ic_input_add" />
+
+    <TextView
+        android:id="@+id/groupName"
+        android:layout_width="match_parent"
+        android:layout_height="75dp"
+        android:background="#e6eae3"
+        android:gravity="center"
+        android:text="家族用　グループ"
+        android:textSize="24sp"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:layout_editor_absoluteX="0dp" />
+
+    <LinearLayout
+        android:layout_width="416dp"
+        android:layout_height="500dp"
+        android:layout_marginTop="8dp"
+        android:layout_marginBottom="8dp"
+        android:orientation="vertical"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/groupName">
+
+        <ListView
+            android:id="@+id/list_view"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent" />
+    </LinearLayout>
+    <!--<Button-->
+    <!--android:id="@+id/addQR"-->
+    <!--android:layout_width="match_parent"-->
+    <!--android:layout_height="144dp"-->
+    <!--android:background="@drawable/white"-->
+    <!--android:gravity="center"-->
+    <!--android:text="QRコードで追加"-->
+    <!--android:textSize="24sp"-->
+    <!--android:drawableLeft="@drawable/camera_image"-->
+    <!--app:layout_constraintTop_toBottomOf="@+id/groupName"-->
+    <!--tools:layout_editor_absoluteX="0dp" />-->
+
+    <!--<Button-->
+    <!--android:id="@+id/addID"-->
+    <!--android:layout_width="match_parent"-->
+    <!--android:layout_height="144dp"-->
+    <!--android:background="@drawable/white"-->
+    <!--android:gravity="center"-->
+    <!--android:text="IDで追加"-->
+    <!--android:textSize="24sp"-->
+    <!--android:drawableLeft="@drawable/search_image"-->
+    <!--app:layout_constraintTop_toBottomOf="@+id/addQR"-->
+    <!--tools:layout_editor_absoluteX="0dp" />-->
+
+    <!--<Button-->
+    <!--android:id="@+id/addMail"-->
+    <!--android:layout_width="match_parent"-->
+    <!--android:layout_height="144dp"-->
+    <!--android:background="@drawable/white"-->
+    <!--android:drawableLeft="@drawable/mail_image"-->
+    <!--android:gravity="center"-->
+    <!--android:text="メールで招待"-->
+    <!--android:textSize="24sp"-->
+    <!--app:layout_constraintTop_toBottomOf="@+id/addID"-->
+    <!--tools:layout_editor_absoluteX="0dp" />-->
+
+    <!--<ListView-->
+    <!--android:id="@android:id/list"-->
+    <!--android:layout_width="match_parent"-->
+    <!--android:layout_height="wrap_content" />-->
+
+</android.support.constraint.ConstraintLayout>
+
+    <!--<LinearLayout-->
+    <!--xmlns:android="http://schemas.android.com/apk/res/android"-->
+    <!--xmlns:tools="http://schemas.android.com/tools"-->
+    <!--android:padding="5dp"-->
+    <!--android:orientation="vertical"-->
+    <!--android:background=""-->
+    <!--android:layout_width="match_parent"-->
+    <!--android:layout_height="match_parent"-->
+    <!--tools:context=".views.AddMemberActivity">-->
+
+    <!--<ListView-->
+    <!--android:id="@android:id/list"-->
+    <!--android:layout_width="match_parent"-->
+    <!--android:layout_height="wrap_content" />-->
+
+    <!--</LinearLayout>-->