diff --git a/app/build.gradle b/app/build.gradle
index 8a5b3fa..f34f8ff 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -4,7 +4,7 @@
     compileSdkVersion 28
     defaultConfig {
         applicationId "com.example.cosmosclient"
-        minSdkVersion 15
+        minSdkVersion 26
         targetSdkVersion 28
         versionCode 1
         versionName "1.0"
diff --git a/app/src/main/java/com/example/cosmosclient/services/CosmosBackgroundService.java b/app/src/main/java/com/example/cosmosclient/services/CosmosBackgroundService.java
index d6d0834..74be9d2 100644
--- a/app/src/main/java/com/example/cosmosclient/services/CosmosBackgroundService.java
+++ b/app/src/main/java/com/example/cosmosclient/services/CosmosBackgroundService.java
@@ -63,6 +63,7 @@
     private CosmosLocation LOC = new CosmosLocation();
     private double leftLat,leftLon,rightLat,rightLon; //ここに計算予定
     private int count = 0;
+    private NotificationManager notificationManager;
 
     public CosmosBackgroundService() {
         super("CosmosBackgroundService");
@@ -82,6 +83,10 @@
         context = getApplicationContext();
         // LocationManager インスタンス生成
         locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
+        notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
+        int importance = NotificationManager.IMPORTANCE_HIGH;
+        NotificationChannel mChannel = new NotificationChannel("cosmos", "cosmosChannel", importance);
+        notificationManager.createNotificationChannel(mChannel);
     }
 
     @Override
@@ -249,6 +254,28 @@
 
         updateAreaInformation(location);
         this.notifications=searchNotifications(cosmos,location);
+        sendNotifications(this, notifications);
+
+
+    }
+
+    private void sendNotifications(CosmosBackgroundService cosmosBackgroundService, List<Notification> notifications) {
+        int notificationId = 1;
+//      MainActivity→broadcastreseiver(?)に変更
+//        Intent intent = new Intent(cosmosBackgroundService, MainActivity.class);
+//        以下二行はボタンについてだよ
+//        PendingIntent pendingIntent = PendingIntent.getActivity(cosmosBackgroundService, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
+//        android.app.Notification.Action action = new android.app.Notification.Action(R.drawable.notification_icon, "ボタンだよ", pendingIntent);
+
+        android.app.Notification notification = new android.app.Notification.Builder(cosmosBackgroundService)
+                .setContentTitle("通知タイトル")
+                .setContentText("通知ないよう")
+                .setSmallIcon(R.drawable.icon_no)
+                .setChannelId("cosmos")
+//                .setGroup("")
+//                .addAction(action)
+                .build();
+        notificationManager.notify(notificationId, notification);
     }
 
     @Override
diff --git a/app/src/main/res/drawable/icon_no.png b/app/src/main/res/drawable/icon_no.png
new file mode 100644
index 0000000..807f3e4
--- /dev/null
+++ b/app/src/main/res/drawable/icon_no.png
Binary files differ