Well I searched quit a lot on the new, and I found no good answer for that, unless your phone is rooted. I am pretty sure you can do this in bash codes, but I have no idea where even to read about that.
I want to make an app with 2 buttons. 1st button will change the date of my phone 1 day forword 2nd button will change the hour of my phone 1 hour backword.
I want that the button will change the clock in the settings of phone thank you all:)