3
두 개의 탭이 포함 된 ViewLay와 TabLayout이있는 Activity가 있습니다. 이 탭은 Recyclerview를 포함하는 재사용되는 하나의 Fragment입니다. 따라서 각 조각/탭에는 일련의 항목이있는 recyclerview가 있습니다.안드로이드 TabLayout 두 개의 탭이 있고 각각의 recyclerview는 전환 할 때 맨 위로 스크롤됩니다.
이 탭 사이를 전환하면 이전 탭으로 돌아갈 때 스크롤 상태가 유지되지 않습니다.
무엇이 누락 되었습니까?
활동 :
public class EventsActivity extends AbstractTracActivity implements OnRowClickListener {
@BindView(R.id.toolbar)
Toolbar toolbar;
@BindView(R.id.tabs)
TabLayout tabLayout;
@BindView(R.id.viewpager)
ViewPager viewPager;
private final String TAG = EventsActivity.class.getSimpleName();
private static Context context;
private SearchView searchView;
private static EventListFragment eventsFragment, clubsFragment;
@Override
public void onCreate(Bundle savedInstanceState) {
setTheme(R.style.TracTracAppTheme);
super.onCreate(savedInstanceState);
setContentView(R.layout.events);
ButterKnife.bind(this);
context = this;
setSupportActionBar(toolbar);
if (getSupportActionBar() != null) {
getSupportActionBar().setLogo(R.drawable.tractrac_logo);
getSupportActionBar().setDisplayShowTitleEnabled(false);
}
eventsFragment = EventListFragment.newInstance(EventListFragment.ListType.EVENTS);
clubsFragment = EventListFragment.newInstance(EventListFragment.ListType.CLUBS);
TabLayout.Tab events = tabLayout.newTab();
TabLayout.Tab clubs = tabLayout.newTab();
tabLayout.addTab(events, 0);
tabLayout.addTab(clubs, 1);
tabLayout.setTabTextColors(ContextCompat.getColorStateList(this, R.color.accent));
tabLayout.setSelectedTabIndicatorColor(ContextCompat.getColor(this, R.color.accent));
ViewPagerAdapter adapter = new ViewPagerAdapter (getSupportFragmentManager());
viewPager.setAdapter(adapter);
tabLayout.setupWithViewPager(viewPager);
viewPager.setOffscreenPageLimit(2);
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { }
@Override
public void onPageSelected(int position) { }
@Override
public void onPageScrollStateChanged(int state) {
searchView.setQuery("", true);
searchView.clearFocus();
searchView.setIconified(true);
eventsFragment.filterList(null);
clubsFragment.filterList(null);
}
});
}
...
public static class ViewPagerAdapter extends FragmentPagerAdapter {
public ViewPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 1:
return clubsFragment;
default:
return eventsFragment;
}
}
@Override
public int getCount() {
return 2;
}
@Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 1:
return context.getResources().getString(R.string.section_clubs);
default:
return context.getResources().getString(R.string.section_events);
}
}
}
}
조각 : 당신이 스크롤 상태 인 리셋의 원인 인 새로운 EventsRecyclerAdapter 때마다 생성되는 곳 onPageScrollStateChanged에서
public class EventListFragment extends Fragment implements EventsFragmentPresenter.ViewInterface {
enum ListType { EVENTS, CLUBS }
private EventsFragmentPresenter presenter;
private ListType listType;
private List<Event> events;
private RecyclerView recyclerView;
public static EventListFragment newInstance(ListType listType) {
EventListFragment f = new EventListFragment();
Bundle args = new Bundle();
args.putSerializable("listType", listType);
f.setArguments(args);
return f;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(com.tractrac.androidlib.R.layout.base_list_fragment, container, false);
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
recyclerView = (RecyclerView) view.findViewById(com.tractrac.androidlib.R.id.recycler_view);
switch (getListType()) {
case EVENTS:
getPresenter().getEvents();
break;
case CLUBS:
getPresenter().getClubEvents();
break;
}
}
private EventsFragmentPresenter getPresenter() {
if (presenter == null) {
presenter = new EventsFragmentPresenter();
presenter.initialize(this);
}
return presenter;
}
private ListType getListType() {
if (listType == null) {
listType = (ListType) getArguments().getSerializable("listType");
}
return listType;
}
@Override
public void listReady(List<Event> events) {
EventsRecyclerAdapter adapter = new EventsRecyclerAdapter(events, (EventsActivity) getActivity());
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getContext());
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(adapter);
if (getListType() == ListType.EVENTS) {
mLayoutManager.scrollToPosition(getPresenter().getCurrentDayEventIndex(events));
}
this.events = events;
((EventsActivity) getActivity()).hideSpinner();
}
public void filterList(String filterBy) {
if (TextUtils.isEmpty(filterBy)) {
EventsRecyclerAdapter adapter = new EventsRecyclerAdapter(events, (EventsActivity) getActivity());
recyclerView.setAdapter(adapter);
return;
}
List<Event> filteredEvents = new ArrayList<>();
for (Event event : events) {
if (event.getName().toLowerCase().contains(filterBy) || event.getLocation().toLowerCase().contains(filterBy))
filteredEvents.add(event);
}
EventsRecyclerAdapter adapter = new EventsRecyclerAdapter(filteredEvents, (EventsActivity) getActivity());
recyclerView.setAdapter(adapter);
}
}