Android Camera App with Random Overlay

I have created the graphics for an Android Camera App that I am trying to create. This app is to include my animated intro/splash screen, my camera button, my save and discard buttons, and three random overlay graphics. After the intro and when the camera preview loads up, when the user takes a picture, a preview of their picture is to be shown with 1 of my 3 custom overlays centered at the bottom of the picture (no matter if the picture is taken in landscape of portrait mode). At this point, the user is to have the option of saving the picture, or discarding the picture. The Details: I would need to be able to change the package name, and be shown how to do so. I would need to be able to change the app icon. I would need to know how everything works within the app, and how to replace the graphics and input the intro. With that said, I am able to give you my camera button, as well as the save and discard button. For the overlays, I would simply give you a blank (numbered) overlay. This isn't the real overlay, it would just be an image placeholder so that you can get it lined up correctly. I will provide three of them, numbered appropriately, so that we know if it is working. The intro is 58 frames long, at 3.13 seconds. I created it in Adobe After Effects and can save it/export it as whatever file extension we need. The overlays need to be randomized. Meaning, when a user takes a picture, any one of the three overlays could pop up, in a completely random manner. Also, when the picture is saved, it needs to be saved with the overlay. Both the camera button, and the save and discard buttons change color when pressed. I will be providing you with both versions of the button. In regards to the overlays, I would want them centered at the bottom of the preview screen (once the picture is taken), with about a 10px space at the bottom), in both landscape and portrait. So in portrait orientation, if the user has the phone turned so that the "save" and "discard" buttons are on the bottom, the overlay would have to reside about 10px above that. When in landscape orientation, the camera button (which is on a bar) and the save and discard button (also on a bar), are to be situated on the right side (obviously the save and discard button will only be there when previewing a picture that was just captured). The general background for the app would have to be black (#000000). The intro is just 470px X 470px, so it would have to be centered, and all the empty space around it would have to be black. Just like the user's screen should be black if it takes a moment for their camera preview to load. I have read online some issues app creators have been having with updating their apps, so I am not sure if there is some sort of code that needs to be put in the apps so that when it comes time to update it, if I upload a new version, the app knows to update itself, or prompt the user to update it. I will completely own all rights to the app upon completion and upon me paying you. Thank you very much and I look forward to your bids!