title: Android badge/ item counter on each product category
body: <p>I try to develop a simple Shopping list app with different ptoduct categories like "dairy", "meat" etc. For each category there is a different ListView.
  When the user choose category - the new list opens and he can add items.</p>
  
  <p>Now I would like to show to the user:</p>
  
  <ol>
  <li>simple TextView with some 'V'simbol for each category with items</li>
  <li>or (prefer) something like badge with count items for every category.</li>
  </ol>
  
  <p>I know how to add badge icons for categories in XML,
  but I'm still not fully understand what exactly (and where) I have to add  in Java MainActivity ...</p>
  
  <p>Thanks for any help!</p>