Fix issue #3149290: java.lang.RuntimeException: Unable to pause activity

{com.android.settings/com.android.settings.applications.StorageUse}

AbsListView could call mAdapter.getItemId() if a save state happened
after the data changed but before a layout occurred.

Change-Id: Ica020971dc458dff79b56dd810733e217f4f7da6

Author: Dianne Hackborn

core/java/android/widget/AbsListView.java

@@ -963,7 +963,7 @@ public Parcelable onSaveInstanceState() {
 
         SavedState ss = new SavedState(superState);
 
-        boolean haveChildren = getChildCount() > 0;
+        boolean haveChildren = getChildCount() > 0 && mItemCount > 0;
         long selectedId = getSelectedItemId();
         ss.selectedId = selectedId;
         ss.height = getHeight();
@@ -978,8 +978,12 @@ public Parcelable onSaveInstanceState() {
                 // Remember the position of the first child
                 View v = getChildAt(0);
                 ss.viewTop = v.getTop();
-                ss.position = mFirstPosition;
-                ss.firstId = mAdapter.getItemId(mFirstPosition);
+                int firstPos = mFirstPosition;
+                if (firstPos >= mItemCount) {
+                    firstPos = mItemCount - 1;
+                }
+                ss.position = firstPos;
+                ss.firstId = mAdapter.getItemId(firstPos);
             } else {
                 ss.viewTop = 0;
                 ss.firstId = INVALID_POSITION;