title: Custom expandable list view with child search filter
body: <p>I've already implemented a list view with search filter but right now, I have to changed it to expandable list view with child search filter. There would be an edit text as a search bar and filters all the child of all groups. This is the scenario,</p>
  
  <p>*Person - object consist of name, address, phone number and photo.</p>
  
  <p>Group 1 - Friends (Child 1 - Person, Child 2 - Person, Child 3 - Person)</p>
  
  <p>Group 2 - Family (Child 1 - Person, Child 2 - Person)</p>
  
  <p>Group 3 - Officemates (Child 1 - Person, Child 2 - Person, Child 3 - Person, Child 4 - Person)</p>
  
  <p>As of now, I have to port from array adapter to base expandable list adapter and filterable. Can someone help me with this? Thanks.</p>