Widget: Catch null point exception in AbsListViewAutoScroller

The first view of AbsListView is null, so there is a NullPointerException
happen.

Add a judgement for the first view of AbsListView.

CRs-Fixed: 776294

Change-Id: I7e25d1430b1bab0cff313492163a419fbf5960b5

parent 1fff63c2

core/java/com/android/internal/widget/AutoScrollHelper.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -912,7 +912,7 @@ public abstract class AutoScrollHelper implements View.OnTouchListener {
		// Are we already showing the entire first item?
		if (firstPosition <= 0) {
		final View firstView = target.getChildAt(0);
		if (firstView.getTop() >= 0) {
		if (firstView == null \|\| firstView.getTop() >= 0) {
		return false;
		}
		}