Basic Android Images Slideshow

I need to create a slideshow for android devices [tablet] which shows the images just like the default slideshow option on android but have the following features: 1. Unlike the default slideshow of android, I want to display new 'incoming' images which are created on the device while the slideshow is running. that means, when the slider first runs it sorts the images by date in a descending order [new > old] and when it detects there is a new image on the device, it restarts the slideshow and plays again from new to old (hence the new image will be first). 2. I need a settings screen to control the amount of seconds for each slide [small button, the app shouldn't have an action bar] 3. App should run in full screen mode and stop screen from going to `sleep` mode.