Value help dialog , gathering information from row selection

I am working on a "Single select" value help dialog. Where i was able to data bind with my odata service model. I would like to know if there is a way i could identify my current row selection and also the selected key of my row selection using getSelectedKey() method.

Currently i am not able to use Selection change event of sap.m.valuehelp dialog to identify if there is a selection change, nor my method to retreive the row selection from value help dialog is not working.  I need  to do an operation on 1) when a row selection change has been made and then 2) get selected key of the selected row from value help dialog

I am working on the same single select code provided in sapui5 explored page.

SAPUI5 Explored Value help single selection

• table.attachRowSelect(function(){ 
•                     for(var i = 0; i < table.getSelectedIndices(); i++){ 
•                              
•                               //table.getRows()[table.getSelectedIndices()[i]].getCells()[1],
•                              
•                               table.getRows()[table.getSelectedIndices()[i]].getCells()[1].getKey(); 
•                     } 
•           }); 

Any ideas and suggestions would be really great thank you