Services Notification

gistfile1.txt

пример старта запущенной службы на переднем плане:


public class MyActivity extends Activity{
    private void commandStart() {

        if (!mServiceIsStarted) {
            moveToStartedState();
            return;
        }

        if (mExecutor == null) {
            // Start Executor task in Background Thread.
        } 
    }
}

Вот код создания постоянного уведомления в версиях


до Android O
@TargetApi(25)
    public static class PreO {

        public static void createNotification(Service context) {
            // Create Pending Intents.
            PendingIntent piLaunchMainActivity = 
                getLaunchActivityPI(context);
            PendingIntent piStopService = getStopServicePI(context);

            // Action to stop the service.
            NotificationCompat.Action stopAction =
                new NotificationCompat.Action.Builder(
                    STOP_ACTION_ICON,
                    getNotificationStopActionText(context),
                    piStopService)
                    .build();

            // Create a notification.
            Notification mNotification =
                new NotificationCompat.Builder(context)
                    .setContentTitle(getNotificationTitle(context))
                    .setContentText(getNotificationContent(context))
                    .setSmallIcon(SMALL_ICON)
                    .setContentIntent(piLaunchMainActivity)
                    .addAction(stopAction)
                    .setStyle(new NotificationCompat.BigTextStyle())
                    .build();

            context.startForeground(
                ONGOING_NOTIFICATION_ID, mNotification);
        }
    }

в Android O, через NotificationChannel
@TargetApi(26)
    public static class O {

        public static final String CHANNEL_ID = 
            String.valueOf(getRandomNumber());

        public static void createNotification(Service context) {
            String channelId = createChannel(context);
            Notification notification = 
                buildNotification(context, channelId);
            context.startForeground(
                ONGOING_NOTIFICATION_ID, notification);
        }

        private static Notification buildNotification(
            Service context, String channelId) {
            // Create Pending Intents.
            PendingIntent piLaunchMainActivity = 
                getLaunchActivityPI(context);
            PendingIntent piStopService = 
                getStopServicePI(context);

            // Action to stop the service.
            Notification.Action stopAction = 
                new Notification.Action.Builder(
                    STOP_ACTION_ICON,
                    getNotificationStopActionText(context),
                    piStopService)
                    .build();

            // Create a notification.
            return new Notification.Builder(context, channelId)
                    .setContentTitle(getNotificationTitle(context))
                    .setContentText(getNotificationContent(context))
                    .setSmallIcon(SMALL_ICON)
                    .setContentIntent(piLaunchMainActivity)
                    .setActions(stopAction)
                    .setStyle(new Notification.BigTextStyle())
                    .build();
        }

        @NonNull
        private static String createChannel(Service ctx) {
            // Create a channel.
            NotificationManager notificationManager =
                (NotificationManager) 
                ctx.getSystemService(Context.NOTIFICATION_SERVICE);
            CharSequence channelName = "Playback channel";
            int importance = NotificationManager.IMPORTANCE_DEFAULT;
            NotificationChannel notificationChannel =
                new NotificationChannel(
                    CHANNEL_ID, channelName, importance);

            notificationManager.createNotificationChannel(
                 notificationChannel);
            return CHANNEL_ID;
        }
    }