Am o orizontală ViewPager2
. Pe cel de-al doilea diapozitiv de vedere pager, am o RecyclerView
care are infinit de defilare puse în aplicare. Am folosit EndlessRecyclerViewScrollListener să pună în aplicare scroll infinit.
Cu toate acestea, atunci când defilare în jos acest RecyclerView
nu declanșa defilare infinit. Pagina 2 din scroll infinit nu este niciodată numit, doar pagina 1.
Aici este clasa mea cu ViewPager2
:
public class BaseBottomNavigationViewActivity extends BaseActivity implements BottomNavigationView.OnNavigationItemSelectedListener {
// The number of pages in the bottom navigation view
private static final int NUM_PAGES = 5;
// The view pager
private ViewPager2 viewPager;
// The pager adapter
private FragmentStateAdapter pagerAdapter;
// The bottom navigation view
private BottomNavigationView bottomNavigationView;
private NewPostBottomSheetDialogFragment newPostModalDialog;
private RelativeLayout newPostButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
viewPager = findViewById(R.id.view_pager);
bottomNavigationView = findViewById(R.id.bottom_navigation_view);
// The number of screens to keep in memory
viewPager.setOffscreenPageLimit(5);
// Disable swiping in the view pager
viewPager.setUserInputEnabled(false);
// Set the pager adapter
pagerAdapter = new BottomNavigationViewPagerAdapter(this);
viewPager.setAdapter(pagerAdapter);
// Register the item selected listener
bottomNavigationView.setOnNavigationItemSelectedListener(this);
// Set default selection (home)
bottomNavigationView.setSelectedItemId(R.id.action_first);
}
@Override
protected int getLayoutResource() {
return R.layout.activity_base_bottom_navigation_view;
}
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.action_first:
viewPager.setCurrentItem(0, false);
break;
case R.id.action_second:
viewPager.setCurrentItem(1, false);
break;
case R.id.action_third:
return false;
case R.id.action_fourth:
viewPager.setCurrentItem(3, false);
break;
case R.id.action_fifth:
viewPager.setCurrentItem(4, false);
break;
default:
break;
}
return true;
}
private static class BottomNavigationViewPagerAdapter extends FragmentStateAdapter {
public BottomNavigationViewPagerAdapter(FragmentActivity fa) {
super(fa);
}
@Override
public Fragment createFragment(int position) {
switch (position) {
case 0:
return new FirstPageFragment();
case 1:
return new SecondPageFragment();
case 2:
return new ThirdPageFragment();
case 3:
return new FourthPageFragment();
case 4:
return new FifthPageFragment();
}
return null;
}
@Override
public int getItemCount() {
return NUM_PAGES;
}
}
}
Și aici este clasa pentru cea de-a doua pagină în ViewPager2
:
public class SecondPageFragment extends Fragment {
private MyAdapter myAdapter;
private LinearLayoutManager layoutManager;
private RecyclerView recyclerView;
private EndlessRecyclerViewScrollListener scrollListener;
private List<Object> objects = new ArrayList<>();
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_page_two, parent, false);
}
@Override
public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
recyclerView = view.findViewById(R.id.recycler_view);
layoutManager = new LinearLayoutManager(getContext());
recyclerView.setLayoutManager(layoutManager);
myAdapter = new MyAdapter(getContext(), layoutManager, objects);
recyclerView.setAdapter(myAdapter);
scrollListener = new EndlessRecyclerViewScrollListener(layoutManager) {
@Override
public void onLoadMore(int page, int totalItemsCount, RecyclerView view) {
getData(page);
}
};
recyclerView.addOnScrollListener(scrollListener);
}
private void getData(final int page) {
// Here I call the API to fetch the data and add them to the objects list
}
}
De ce nu este de asteptare pagina 2 pentru RecyclerView
atunci când defilare în această situație și ce pot face pentru a remedia problema?
Multumesc!!!