start an image slideshow on the click of a button

I have written the code to select a folder from the SDCard and its path is returned as a Uri/string. I also check if the returned folder contains images(ending with .jpg). Now that I have the path, I want to start a new activity(using intents and passing the value of uri in intent.putextras) on the onClick of a button so that the next activity displays images one after the other like a slideshow (using timers). Just give me basic outline as to how I go abt in doing this. What steps shd I follow?