Implementing scrolling in a mobile application on your own?

Question

Java

I have an Android application that renders several buttons through OpenGL. Only one button is placed on the screen, the rest are on the right. An analogue is the choice of the world in Angry Birds. It is necessary, actually, to implement scrolling. I implemented it, but the algorithm, frankly, is a crutch. More precisely, he calculates the speed when the finger is lifted off (to continue the animation, since one of the buttons must always be in the center of the screen). Could you please give me some tutorials on this topic to do things like people do?

Answer 1

developer.android.com/reference/android/view/VelocityTracker.html
developer.android.com/reference/android/view/GestureDetector.html
developer.android.com/reference/android/view/GestureDetector.SimpleOnGestureListener.html#onFling( android.view.MotionEvent, android.view.MotionEvent, float, float)

Answer 2

In addition, I can advise you to look into the source code, for example, ScrollView 'a.