Wait unitl ListView's smoothScrollToPosition() finishes

Question

Scope

I need to scroll to certain position smoothly and then "jump" to another position with setSelection(anotherPosition). This is done to c

Answer 1

final ListView listView = ...;
View listItemView = ...;
listView.smoothScrollBy(listItemView.getHeight() * NUMBER_OF_VIEWS, 
    DURATION * 2);
listView.postDelayed(new Runnable() {
    public void run() {
        listView.smoothScrollBy(0, 0); // Stops the listview from overshooting.
        listView.setSelection(0);
    }
}, DURATION);

Of course, direction of the scroll etc. would need to be adjusted for your use case (go to the top of the list)

EDIT: Old solution could overshoot if the velocity of the scroll was too high, smoothScrollBy(0,0) will stop the smooth scrolling before setting the selection properly and immediately.

Answer 2

Another way is to add an OnScrollListener.

private final int scrollableItems = 20;

int firstVisiblePosition = mListView.getFirstVisiblePosition();
if (firstVisiblePosition < scrollableItems) {
    mListView.smoothScrollToPosition(0);
} else {

    mListView.setOnScrollListener(new AbsListView.OnScrollListener() {
      @Override
      public void onScrollStateChanged(AbsListView absListView, int i) {
        if (i == SCROLL_STATE_IDLE) {
          mListView.setSelection(0);
           }
      }
   })

   mListView.smoothScrollToPosition(firstVisiblePosition - scrollableItems);
}
mListView.clearFocus();