So I was looking into phone app development again (as you do) and I'm working on a simple QoL app for me and my SO that will help us automate some home management and finances stuff. Naturally I delved down the rabbit hole deep and wanted to have push notifications so we don't have to check the app periodically to know when certain things happen... Oh boy... Why is mobile development so convoluted, especially if you don't want to rely on Google Services...

It seems that the most accepted way of doing this is Firebase (FCM). Well me being me, I refuse to use google services for this and I prefer self hosted solutions (for data privacy reasons) which eliminates most products out there.

It also didn't help that my framework of choice is Flutter/Dart, because fuck Android Studio and the insane buggy XML stuff and fuck Android and it's constantly changing APIs...

Well In the end I decided on a rather simple solution and self hosted an AMQP service (RabbitMQ in my case, as I have some experience with it already) and implemented a foreground service in android platform specific code on top of my flutter project to kickstart it and made my phone a queue listener... This now means I can push notifications from my server to the Messaging Queue and it will be pushed into my App automatically!

One thing I found out on this journey was that Android now kills most background services and enforces foreground services to have a visible notification in the status drawer... which I actually approve of. It's a bit annoying that you can start a reliable background service, but I'm absolutely on-board with long running processes started by my apps are constantly visible...

Long story short, I love reinventing all the wheels, especially if it's for free and private... And I also went to sleep at 2AM again because this took longer that I'd like to tune... but it works, and it's google free...

I'm thinking of trying to package this up as a flutter module later, but first I want to do testing on battery life and the general life cycle of the service. RabbitMQ says they have the client library optimized for long-lasting connections and it should be just using a tcp socket, which should pretty much be what all the push notification services are doing anyway. I'm also not completely satisfied with how the permanent notification looks.. it isn't collapsible like some of the other ones from other apps and it's about 2 lines high instead of single line... which is something quite annoying and I'm struggling to find any relevant docs on how this is done other than possible making a custom Notification Style... but I just can't believe that everyone is doing that.. there must be a built-in somewhere -_-... Ugh Android is hell...

Anyway, if any android devs here have some hints, tips and tricks on how to handle this type of background/foreground process stuff and I'm doing something wrong let me know, cause googling this shit is a nightmare too!