As {@link android.support.v4.widget.SwipeRefreshLayout} only supports one direct child by * default, we need to manually iterate through our swipeable children to see if any are in a * state to trigger the gesture. If so we return false to start the gesture. */ @Override public boolean canChildScrollUp() { if (mSwipeableChildren != null && mSwipeableChildren.length > 0) { // Iterate through the scrollable children and check if any of them can not scroll up for (View view : mSwipeableChildren) { if (view != null && view.isShown() && !canViewScrollUp(view)) { // If the view is shown, and can not scroll upwards, return false and start the // gesture. return false; } } } return true; } // END_INCLUDE(can_child_scroll_up) // BEGIN_INCLUDE(can_view_scroll_up) /** * Utility method to check whether a {@link View} can scroll up from it's current position. * Handles platform version differences, providing backwards compatible functionality where * needed. */ private static boolean canViewScrollUp(View view) { if (android.os.Build.VERSION.SDK_INT >= 14) { // For ICS and above we can call canScrollVertically() to determine this return ViewCompat.canScrollVertically(view, -1); } else { if (view instanceof AbsListView) { // Pre-ICS we need to manually check the first visible item and the child view's top // value final AbsListView listView = (AbsListView) view; return listView.getChildCount() > 0 && (listView.getFirstVisiblePosition() > 0 || listView.getChildAt(0).getTop() < listView.getPaddingTop()); } else { // For all other view types we just check the getScrollY() value return view.getScrollY() > 0; } } } // END_INCLUDE(can_view_scroll_up) }