private void init() {
    setTitle(App.ctx.getString(R.string.contact_findFriends));
    adapter = new HeaderListAdapter<>(SearchUserItemHolder.class);

    recyclerView.setLayoutManager(new LinearLayoutManager(this));
    recyclerView.setOnLoadDataListener(
        new RefreshableRecyclerView.OnLoadDataListener() {
          @Override
          public void onLoad(int skip, int limit, boolean isRefresh) {
            loadMoreFriend(skip, limit, isRefresh);
          }
        });
    recyclerView.setAdapter(adapter);
  }
 @Override
 protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.contact_add_friend_activity);
   init();
   recyclerView.refreshData();
 }
 @OnClick(R.id.searchBtn)
 public void search(View view) {
   searchName = searchNameEdit.getText().toString();
   recyclerView.refreshData();
 }