MainActivity.java

SRL = (SwipeRefreshLayout) findViewById(R.id.swiperefresh);
        SRL.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener(){
            @Override
            public void onRefresh() {
                Log.i(TAG, "onRefresh called from SwipeRefreshLayout");

                // This method performs the actual data-refresh operation.
                // The method calls setRefreshing(false) when it's finished.
                myUpdateOperation();
            }
        });