I have a listView that i need to show a bottom menu when it scrolls up and hide it when scroll down , i have
var mLastFirstVisibleItem = 0
listView.setOnScrollListener(object : AbsListView.OnScrollListener {
override fun onScroll(
view: AbsListView?,
firstVisibleItem: Int,
visibleItemCount: Int,
totalItemCount: Int
) {
// TODO Auto-generated method stub
}
override fun onScrollStateChanged(view: AbsListView, scrollState: Int) {
// TODO Auto-generated method stub
val currentFirstVisibleItem = view.firstVisiblePosition
if (currentFirstVisibleItem > mLastFirstVisibleItem) {
this.menuView.visibility = View.INVISIBLE
Log.i("a", "scrolling down...")
} else if (currentFirstVisibleItem < mLastFirstVisibleItem) {
this.menuView.visibility = View.VISIBLE
Log.i("a", "scrolling up...")
}
mLastFirstVisibleItem = currentFirstVisibleItem
}
})
the problem is the listView has one item with a a textView that has long text , so there is no first and last items it only one item , hence above code always shows the menu as
if (currentFirstVisibleItem > mLastFirstVisibleItem) {
will be
if (0 > 0) {
Which is false , Any way to handle this case ?
