Changes on Android APP

Expert Android developer needed for updating existing project 1. when in single picture, the swipe ( so touch screen that move from picture 1 to picture 2 ) must move the picture only horizontal, NOT VERTICAL !!! 2. when in single picture the swipe ( so touch screen that move from picture 1 to picture 2 ) must work even by moving a little the picture... Now i have to became crazy to move the picture so to the left to swipe ! 3. when in single picture, after 3 seconds the top bar and the bottom bar must be hided automatically and show it again IF click on the screen. ( see the ipad version ) So it must go on full screen after 3 seconds of inactivity even WITHOUT the fullscreen. 4. if slideshow but using the zoom for example, only after the last zooming is starting the counter of the 4-5 second of the slideshow...