Android - Implementing Startforeground For a Service

Android - implementing startForeground for a service?

I'd start by completely filling in the Notification. Here is a sample project demonstrating the use of startForeground().

Using startForeground with android service

You can use this method. Now with latest API versions you need to set channel for notifications.

private static final String NOTIFICATION_CHANNEL_ID ="notification_channel_id";
private static final String NOTIFICATION_Service_CHANNEL_ID = "service_channel";
.....
private void startInForeground() {
    int icon = R.mipmap.icon;

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP){
        icon = R.mipmap.icon_transparent;
    }

    Intent notificationIntent = new Intent(this, CurrentActivity.class);
    PendingIntent pendingIntent=PendingIntent.getActivity(this,0,notificationIntent,0);
    NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
        .setSmallIcon(icon)
        .setContentIntent(pendingIntent)
        .setContentTitle("Service")
        .setContentText("Running...");
    Notification notification=builder.build();
    if(Build.VERSION.SDK_INT>=26) {
        NotificationChannel channel = new NotificationChannel(NOTIFICATION_Service_CHANNEL_ID, "Sync Service", NotificationManager.IMPORTANCE_HIGH);
        channel.setDescription("Service Name");
        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.createNotificationChannel(channel);

        notification = new Notification.Builder(this,NOTIFICATION_Service_CHANNEL_ID)
            .setContentTitle("Service")
            .setContentText("Running...")
            .setSmallIcon(icon)
            .setContentIntent(pendingIntent)
            .build();
    }
    startForeground(121, notification);
}

how to start a foreground service in qt android?

You have to define FOREGROUND_SERVICE permission in AndroidManifest.xml

<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />

the above line should be added before <application>

You can do it with simple Foreground service of andorid.
please find the sample from here.

Android 12 - Foreground service launch restrictions

There is no one in the world that can give you an answer. The idea of all these restrictions is that we as developers need to optimize our applications. So if this is not possible for you it means most likely that you need to optimize the way you do your work. For this to happen you need to provide more info of what exactly events you are receiving, what is exactly your use case, etc.

https://developer.android.com/about/versions/12/foreground-services#cases-fgs-background-starts-allowed

As you can see there is info about exceptions for:

Your app receives a Bluetooth broadcast that requires the BLUETOOTH_CONNECT or BLUETOOTH_SCAN permissions.

But there is nothing in your question saying that your use case might relate to this.

Also, I don't understand how the app might be killed, but you keep working in the background.

Also if you want to constantly do something - why there is an event when you are in the background. Just when the user opens the app - start the service and keep it going.

You can also just "hack" it and ask the user to remove you from battery optimization.

https://developer.android.com/training/monitoring-device-state/doze-standby#support_for_other_use_cases

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