Horizontal scrollview button focus

Question

I am working on an android application where i am implementing horizontal scroll view. I have come across two issues and cant really figure out how to fix them. They are:

1. when the horizontal scroll view reaches its left most or right most end, the left/right image button should become inactive.
2. When i click on a button(which appears half) in horizontal scroll view, the button should appear at the center with full visibility.

The below is the screen shot:

Answer 1

我认为这个链接可能有用，高级别我发现同样的问题链接你也看到那个线程水平滚动图像左右箭头