Mój RecyclerViewnie wywołuje onCreateViewHolder, onBindViewHoldernawet MenuViewHolderkonstruktora, dlatego nic nie pojawia się w RecyclerView. Umieszczam dzienniki do debugowania i żaden dziennik nie jest wyświetlany. Co może być problemem?
Mój adapter:
public class MenuAdapter extends RecyclerView.Adapter<MenuAdapter.MenuViewHolder> {
private LayoutInflater inflater;
List<Menu> data = Collections.emptyList();
public MenuAdapter(Context context, List<Menu> data) {
Log.i("DEBUG", "Constructor");
inflater = LayoutInflater.from(context);
Log.i("DEBUG MENU - CONSTRUCTOR", inflater.toString());
this.data = data;
for(Menu menu: this.data){
Log.i("DEBUG MENU - CONSTRUCTOR", menu.menu);
}
}
@Override
public MenuViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.row_menu, parent, false);
MenuViewHolder holder = new MenuViewHolder(view);
return holder;
}
@Override
public void onBindViewHolder(MenuViewHolder holder, int position) {
Log.i("DEBUG MENU", "onBindViewHolder");
Menu current = data.get(position);
holder.title.setText(current.menu);
}
@Override
public int getItemCount() {
return 0;
}
class MenuViewHolder extends RecyclerView.ViewHolder {
TextView title;
ImageView icon;
public MenuViewHolder(View itemView) {
super(itemView);
title = (TextView) itemView.findViewById(R.id.menuText);
}
}Mój niestandardowy wiersz XML:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/menuText"
android:text="Dummy Text"
android:layout_gravity="center_vertical"
android:textColor="#222"/>i mój fragment:
public NavigationFragment() {
// Required empty public constructor
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mUserLearnedDrawer = Boolean.valueOf(readFromPreferences(getActivity(), KEY_USER_LEARNED_DRAWER, "false"));
if (savedInstanceState != null) {
mFromSavedInstaceState = true;
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_navigation, container, false);
RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.drawer_list);
MenuAdapter adapter = new MenuAdapter(getActivity(), getData());
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.setAdapter(adapter);
return view;
}
dlaczego u ustawić recyklerView.setAdapter (adapter); 2 razy?
—
Panayiotis Irakleous,
Inną przyczyną tego problemu jest błędne dopasowanie układu elementu do wysokości elementu nadrzędnego, więc w danym momencie wyświetlany jest tylko jeden element.
—
Joe Lapp
W moim przypadku pomóż w tym: invoicesRecyclerView.setHasFixedSize (true) fakturyRecyclerView.setLayoutManager (GridLayoutManager (this, 1))
—
a_subscriber