_recyclerView = (RecyclerView) findViewById(R.id.groupsRecyclerView);
_recyclerView.setHasFixedSize(true);

_recycleViewLayoutManager = new LinearLayoutManager(this);
_recyclerView.setEnabled(true);
_recyclerView.addItemDecoration(new DividerItemDecoration(this, LinearLayoutManager.VERTICAL));

//adding group data
_recycleViewAdapter = new GroupAdapter(groupsItem,new OnItemClickListener(){
   @Override
   public void onItemClick(Group item) {

       selectGroup(item.getGroupID() , item.getGroupName(), String.valueOf(2));

   }
});

_recycleViewAdapter.notifyDataSetChanged();
_recyclerView.setLayoutManager(_recycleViewLayoutManager);
_recyclerView.setAdapter(_recycleViewAdapter);