У меня есть экземпляры signalr в моем приложении для Android, которые позволяют мне обновлять расширяемый список (просто добавляйте или удаляйте дочерние элементы).
Когда я запускаю свое приложение на двух разных мобильных устройствах в начале, оно работает нормально (добавляя или удаляя элементы с обеих сторон), как я действительно хочу, но когда я начинаю перемещаться по разным действиям и повторяю тот же процесс, что и в начале signalr работает (имеет новый/обновленный список), но мой расширяемый список не обновляется.
Вот мой код:
Мой адаптер:
public class rtDateAdapter extends AnimatedExpandableListView.AnimatedExpandableListAdapter {
private LayoutInflater inflater;
private List<rtDay> items = new ArrayList<rtDay>();
public rtDateAdapter(Context context, List<rtDay> days) {
inflater = LayoutInflater.from(context);
this.items = days;
}
@Override
public rtDates getChild(int DayPosition, int datePosition) {
return items.get(DayPosition).getDates().get(datePosition);
}
public void refresh(List<rtDay> items)
{
this.items = null;
this.items = items;
**this.notifyDataSetChanged();**
}
@Override
public long getChildId(int dayPosition, int datePosition) {
return items.get(dayPosition).getDates().get(datePosition).getId();
}
@Override
public View getRealChildView(int dayPosition, int datePosition, boolean isLastChild, View convertView, ViewGroup parent) {
rtDatesHolder holder;
rtDates item = getChild(dayPosition, datePosition);
if (convertView == null) {
holder = new rtDatesHolder();
convertView = inflater.inflate(R.layout.date_item_date_layout, parent, false);
holder.startDate = (TextView) convertView.findViewById(R.id.tvStartDate);
holder.finishDate = (TextView) convertView.findViewById(R.id.tvFinishDate);
convertView.setTag(holder);
} else {
holder = (rtDatesHolder) convertView.getTag();
}
holder.startDate.setText(item.getTimeStart());
holder.finishDate.setText(item.getTimeFinish());
return convertView;
}
@Override
public int getRealChildrenCount(int groupPosition) {
return items.get(groupPosition).getDates().size();
}
@Override
public rtDay getGroup(int groupPosition) {
return items.get(groupPosition);
}
@Override
public int getGroupCount() {
return items.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
rtDayHolder holder;
rtDay item = getGroup(groupPosition);
if (convertView == null) {
holder = new rtDayHolder();
convertView = inflater.inflate(R.layout.date_header_fragment_layout, parent, false);
holder.Name = (TextView) convertView.findViewById(R.id.tvHeaderDay);
convertView.setTag(holder);
} else {
holder = (rtDayHolder) convertView.getTag();
}
holder.Name.setText(item.getName());
return convertView;
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
public boolean isChildSelectable(int arg0, int arg1) {
return true;
}
private static class rtDatesHolder {
TextView startDate;
TextView finishDate;
}
private static class rtDayHolder {
TextView Name;
}
}
Я пытаюсь использовать внутри своего адаптера метод, чтобы заставить this.notifyDataSetChanged, но не работает.
это мой фрагмент:
public class DateFragment extends Fragment {
private View view;
private List<rtDay> Days = new ArrayList<rtDay>();
private Gson gson = new Gson();;
private rtDateAdapter dateAdapter;
private AnimatedExpandableListView listView;
private int DoctorSelectedId;
HubProxy scheduleHub;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
view = inflater.inflate(R.layout.date_fragment_layout, container, false);
DoctorSelectedId = KimchiDataCache.getInstance().pop(2);
return view;
}
public void onResume() {
scheduleHub = HubConnectionFactory.getInstance().getHub();
SubscribeUpdateDates(scheduleHub);
.....
Request request = rtRequestHttpFactory.GetRequestWithParameter(ServerURLServices.PATH_DATES, ServerURLServices.PARAM_FUNCTIONARY_ID, Integer.toString(DoctorSelectedId));
try {
String json = new rtServerRequestBackground().execute(request).get();
Days = gson.fromJson(json, new TypeToken<ArrayList<rtDay>>(){}.getType());
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
dateAdapter = new rtDateAdapter(getActivity(), Days);
listView = (AnimatedExpandableListView) view.findViewById(R.id.listDaysAndDates);
listView.setAdapter(dateAdapter);
listView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
if (listView.isGroupExpanded(groupPosition)) {
listView.collapseGroupWithAnimation(groupPosition);
} else {
listView.expandGroupWithAnimation(groupPosition);
}
return true;
}
});
listView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
......
}
});
super.onResume();
}
@SuppressWarnings("unused")
private void SubscribeUpdateDates(HubProxy scheduleHub) {
scheduleHub.on("UpdateDoctorDates", new SubscriptionHandler1<rtDay[]>() {
@Override
public void run(final rtDay[] days) {
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
Days.clear();
for (rtDay h : days) {
Days.add(h);
}
dateAdapter.refresh(Days);
dateAdapter.notifyDataSetChanged(); //ONLY WORKS AT THE BEGING WHEN I RUN MY APP
}
});
}
}, rtDay[].class);
}
}
Решение
Ну, я, наконец, исправил проблему, я изменил свой класс фрагмента на это:
public class DateFragment extends Fragment {
private View view;
private List<rtDay> Days;
private Gson gson;
private rtDateAdapter dateAdapter;
private AnimatedExpandableListView listView;
private int DoctorSelectedId;
HubProxy scheduleHub;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
view = inflater.inflate(R.layout.date_fragment_layout, container, false);
scheduleHub = HubConnectionFactory.getInstance().getChatHub();
gson = new Gson();
DoctorSelectedId = KimchiDataCache.getInstance().pop(2);
JoinGroup(scheduleHub);
SubscribeUpdateDates(scheduleHub);
Request request = rtRequestHttpFactory.GetRequestWithParameter(ServerURLServices.PATH_DATES, ServerURLServices.PARAM_FUNCTIONARY_ID, Integer.toString(DoctorSelectedId));
try {
String json = new rtServerRequestBackground().execute(request).get();
Days = gson.fromJson(json, new TypeToken<ArrayList<rtDay>>(){}.getType());
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
dateAdapter = new rtDateAdapter(getActivity(),Days);
listView = (AnimatedExpandableListView) view.findViewById(R.id.listDaysAndDates);
listView.setAdapter(dateAdapter);
// In order to show animations, we need to use a custom click handler
// for our ExpandableListView.
listView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
// We call collapseGroupWithAnimation(int) and
// expandGroupWithAnimation(int) to animate group
// expansion/collapse.
if (listView.isGroupExpanded(groupPosition)) {
listView.collapseGroupWithAnimation(groupPosition);
} else {
listView.expandGroupWithAnimation(groupPosition);
}
return true;
}
});
listView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
rtDay day = Days.get(groupPosition);
rtDates date = Days.get(groupPosition).getDates().get(childPosition);
Toast.makeText(getActivity(), "Reservando Cita: " + date.getTimeStart() + " - " + date.getTimeFinish(), Toast.LENGTH_LONG).show();
ActionDialogFragment dialog = ActionDialogFragment.newInstance(getActivity(), ActionEnum.SCHEDULEBYPACIENT, day.getName(),date.getId(),date.getTimeStart(),date.getTimeFinish());
dialog.show(getFragmentManager(), "dialog");
return false;
}
});
return view;
}
private void SubscribeUpdateDates(HubProxy scheduleHub) {
scheduleHub.on("UpdateDoctorDates", new SubscriptionHandler1<rtDay[]>() {
@Override
public void run(final rtDay[] days) {
if (getActivity() != null) {
//THE PROBLEM WA HERE, getActivity().runOnUiThread WAS NULL SOMETIMES I GOT A NULLEXCEPTION(getActivity().runOnUiThread WAS NULL) BUT THE APP WAS STILL RUNNING SMOOTHLY DESPITE THIS, SO I JUST ADD IF STATEMENT BEFORE THIS AND FIX THE PROBLEM, NOW MY LISTVIEW REFRESH WITHOUT PROBLEM.
getActivity().runOnUiThread(new Runnable() {
public void run() {
Days.clear();
for (rtDay h : days) {
Days.add(h);
}
dateAdapter.notifyDataSetChanged();
}
});
}
else{
Days.clear();
for (rtDay h : days) {
Days.add(h);
}
dateAdapter.notifyDataSetChanged();
}
}
}, rtDay[].class);
}
private void JoinGroup(HubProxy scheduleHub) {
scheduleHub.invoke("JoinFunctionaryDatesGroup", DoctorSelectedId);
}
@Override
public void onPause() {
// HubProxy Hub = HubFactory.getInstance().getScheduleHub();
scheduleHub = HubConnectionFactory.getInstance().getChatHub();
scheduleHub.invoke("LeaveFunctionaryDatesGroup", DoctorSelectedId);
super.onPause();
}
}
