Notification

notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.O){
        NotificationChannel channel = new NotificationChannel("leo", "测试通知", NotificationManager.IMPORTANCE_HIGH);
        notificationManager.createNotificationChannel(channel);
    }
    Intent intent = new Intent(this, NotificationActivity.class);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);
    leo = new NotificationCompat.Builder(this, "leo")
            .setContentTitle("官方通知")
            .setContentText("世界这么大，想去走走吗")
            .setSmallIcon(R.drawable.baseline_person_24)
             .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ceshi))
             .setColor(Color.parseColor("#ff0000"))
             .setContentIntent(pendingIntent)
            .setAutoCancel(true)
             .build();

}