How would I programmically refresh my home screen widget (say in a service, or if I want it to refresh when the user clicks a button within an activity to refresh the widget instead of deleting and adding the widget again)?
What I want to do is: I want to create an alarm that will update the widget however often the user sets within their preferences. Oh yeah, I also dont know how to create an alarm if anyone would be kind enough to show me that code too. 
I just need example code for:
1. Refresh widget programmically
2. alarm service
Any help in those would be greatly appreciated. I have searched and I cant seem to find something that is not out of date.