android - Add section to recycle View in run time with dynamic array -

i trying add section/header in recycle view
have handle section stuff in

@override  public int getitemviewtype(int position) { // here custom logic choose view type return position == 0 ? section: item; 

}

but having arraylist have n number of data . 1st section may have 10 row 2nd may have 2 row .so how define section in case .where come know end of 1st section ? , put 2nd one

iterate on each model , remember previous section name of each model item. when ever find new section name, map index.

in adapter return items count fewer data set.

@override public int getitemcount(){    return mdata.size() + msections.size(); } 

always use position + 1, because 1 position ahead.

whenever reach position belongs mapped indexes, return section type , bind accordingly:

@override  public int getitemviewtype(int position) { // here custom logic choose view type   return ispositionsectionindex(position) ? view_type_section: view_type_item; }