BadoongStopper

I wrote this app for my own personal use, but it might be useful to others so here it is. It works on a Huawei P9; your mileage may vary with other devices. When your phone connects to a charger, this app puts the phone in silent mode, waits a second, and takes the phone out of silent mode. The goal is to prevent the annoying noise that plays when you plug the phone in. I have no idea how well this app works (works for me™); no guarantees.

Important notes:
- You have to start the app at least once before it will work. You don't have to run it again after restarting your phone; you just have to run it at least once ever.
- Make sure BadoongStopper has battery optimisations disabled. On my phone this is Settings > Apps > Advanced > Ignore optimisations, change "Allowed" to "All apps", scroll down to BadoongStopper and set it to "Allow".
- Make sure your phone doesn't have any additional stupid app-killing mechanisms enabled. On my phone this is Settings > Advanced settings > Battery manager > Protected apps, make sure BadoongStopper is protected.