@Override
            public void onRefresh() {
                Log.i(LOG_TAG, "onRefresh called from SwipeRefreshLayout");

                initiateRefresh();
            }
Implement {@link SwipeRefreshLayout.OnRefreshListener}. When users do the "swipe to
refresh" gesture, SwipeRefreshLayout invokes
{@link SwipeRefreshLayout.OnRefreshListener#onRefresh onRefresh()}. In
{@link SwipeRefreshLayout.OnRefreshListener#onRefresh onRefresh()}, call a method that
refreshes the content. Call the same method in response to the Refresh action from the
action bar.
SwipeRefreshMultipleViews/Application/src/main/java/com/example/android/swiperefreshmultipleviews/SwipeRefreshMultipleViewsFragment.java