diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 98cbd3d..9919eb8 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -80,6 +80,8 @@
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.CAMERA" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+
 
     <uses-permission android:name="android.permission.INTERNET" />
 
diff --git a/app/src/main/java/com/example/cosmosclient/services/CosomosBackgroundService.java b/app/src/main/java/com/example/cosmosclient/services/CosomosBackgroundService.java
index 5240bad..4ce93a6 100644
--- a/app/src/main/java/com/example/cosmosclient/services/CosomosBackgroundService.java
+++ b/app/src/main/java/com/example/cosmosclient/services/CosomosBackgroundService.java
@@ -1,15 +1,30 @@
 package com.example.cosmosclient.services;
 
+import android.Manifest;
 import android.app.IntentService;
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
 import android.content.Intent;
 import android.content.Context;
+import android.content.pm.PackageManager;
+import android.graphics.Color;
 import android.location.Location;
 import android.location.LocationListener;
+import android.location.LocationManager;
+import android.os.Build;
 import android.os.Bundle;
+import android.support.annotation.RequiresApi;
+import android.support.v4.app.ActivityCompat;
 import android.util.Log;
 
+import com.example.cosmosclient.R;
+
 
 public class CosomosBackgroundService extends IntentService implements LocationListener {
+    private Context context;
+    private LocationManager locationManager;
 
     public CosomosBackgroundService() {
         super("CosomosBackgroundService");
@@ -19,8 +34,12 @@
     public void onCreate() {
         super.onCreate();
         Log.d("debug", "onCreate");
+        context = getApplicationContext();
+        // LocationManager インスタンス生成
+        locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
     }
 
+    @RequiresApi(api = Build.VERSION_CODES.O)
     @Override
     public int onStartCommand(Intent intent, int flags, int startId) {
 
@@ -43,7 +62,44 @@
 //            }
 //        };
 //        thread.start();
+        int requestCode = 0;
+        String channelId = "default";
+        String title = context.getString(R.string.app_name);
+        PendingIntent pendingIntent =
+                PendingIntent.getActivity(context, requestCode,
+                        intent, PendingIntent.FLAG_UPDATE_CURRENT);
+        // ForegroundにするためNotificationが必要、Contextを設定
+        NotificationManager notificationManager =
+                (NotificationManager)context.
+                        getSystemService(Context.NOTIFICATION_SERVICE);
+        // Notification　Channel 設定
+        NotificationChannel channel = new NotificationChannel(
+                channelId, title , NotificationManager.IMPORTANCE_DEFAULT);
+        channel.setDescription("Silent Notification");
+        // 通知音を消さないと毎回通知音が出てしまう
+        // この辺りの設定はcleanにしてから変更
+        channel.setSound(null,null);
+        // 通知ランプを消す
+        channel.enableLights(false);
+        channel.setLightColor(Color.BLUE);
+        // 通知バイブレーション無し
+        channel.enableVibration(false);
+        if(notificationManager != null) {
+            notificationManager.createNotificationChannel(channel);
+            Notification notification = new Notification.Builder(context, channelId)
+                    .setContentTitle(title)
+                    // 本来なら衛星のアイコンですがandroid標準アイコンを設定
+                    .setSmallIcon(android.R.drawable.btn_star)
+                    .setContentText("GPS")
+                    .setAutoCancel(true)
+                    .setContentIntent(pendingIntent)
+                    .setWhen(System.currentTimeMillis())
+                    .build();
 
+            // startForeground
+            startForeground(1, notification);
+        }
+//        startGPS();
 
         return super.onStartCommand(intent,flags,startId);
     }
@@ -64,9 +120,35 @@
         } catch (InterruptedException e) {
             Thread.currentThread().interrupt();
         }
-
     }
-
+//    protected void startGPS() {
+//        StringBuilder strBuf = new StringBuilder();
+//        strBuf.append("startGPS\n");
+//
+//        final boolean gpsEnabled
+//                = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
+//        if (!gpsEnabled) {
+//            // GPSを設定するように促す
+//            enableLocationSettings();
+//        }
+//
+//        if (locationManager != null) {
+//            try {
+//                if (ActivityCompat.checkSelfPermission(this,
+//                        Manifest.permission.ACCESS_FINE_LOCATION)!=
+//                        PackageManager.PERMISSION_GRANTED) {
+//                    return;
+//                }
+//
+//                locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
+//                        MinTime, MinDistance, this);
+//            } catch (Exception e) {
+//                e.printStackTrace();
+//            }
+//        } else {
+//            strBuf.append("locationManager=null\n");
+//        }
+//    }
     @Override
     public void onDestroy() {
         Log.d("debug", "onDestroy");
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 29ef5a5..aca8b2d 100644
--- a/app/src/main/java/com/example/cosmosclient/views/SigninActivity.java
+++ b/app/src/main/java/com/example/cosmosclient/views/SigninActivity.java
@@ -35,7 +35,6 @@
     private Intent intentservice;
 
 
-    @RequiresApi(api = Build.VERSION_CODES.O)
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -58,14 +57,15 @@
 //            }
 //        });
 
-//        Thread thread = new Thread() {
-//            @RequiresApi(api = Build.VERSION_CODES.O)
-//            public void run() {
+        Thread thread = new Thread() {
+            @RequiresApi(api = Build.VERSION_CODES.O)
+            public void run() {
                 intentservice = new Intent(SigninActivity.this, CosomosBackgroundService.class);
                 startForegroundService(intentservice);
-//            }
-//        };
-//        thread.start();
+
+            }
+        };
+        thread.start();
         //各種IDを取得
         SigninButton = findViewById(R.id.SigninButton);
         Button SignupButton = findViewById(R.id.SignupButton);