So I want to create an app where the user can adjust the colors of led, vibrate, and other notifications. I made a small app practicing working with the LED's but I don't know how to change the built in Android preferences. Any ideas of how to do this, where I should look for help? I've been reading the documentation but I have not been able to find out how Android stores these preferences.
The app I am looking to create would be similar to light flow - LED Controller app.