Question

我有Calendar Widget，下面有ListView来填充相关月份的事件。列表显示在特定月份。但日历上有一个问题，即2017年6月有这些活动也会在2015,2016,2018展出...........这个问题怎么解决？

MyAdapterCalendar

public class MyAdapterCalendar extends ArrayAdapter<Event> {

    private List<Event> list;
    private LayoutInflater mInflater;

    public MyAdapterCalendar(Context context, List<Event> list) {
        super(context, R.layout.calender_student_listitems, list);
        this.mInflater = LayoutInflater.from(context);
        this.list = list;
    }

    public void clearItems(List<Event> list) {
        this.list.clear();
        //  this.list.removeAll(list);
        notifyDataSetChanged();
    }

    static class ViewHolder {
        TextView text;
        TextView student_calender_date;

    }

    public void addItems(List<Event> list) {
        this.list.clear();
        this.list.addAll(list);
        notifyDataSetChanged();

    }


    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder;

        if (convertView == null) {

            convertView = mInflater.inflate(R.layout.calender_student_listitems, parent, false);
            viewHolder = new ViewHolder();
            viewHolder.text = (TextView) convertView.findViewById(R.id.student_calender_events);
            viewHolder.student_calender_date = (TextView) convertView.findViewById(R.id.student_calender_date);

            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }

        viewHolder.text.setText(list.get(position).getEvents());


        viewHolder.student_calender_date.setText(list.get(position).getRealdate());
        return convertView;
    }
}

CalenderFragment

 private void makeJsonObjectRequest() {

        RequestQueue requestQueue = Volley.newRequestQueue(getContext());
        String URL = Navigation_URL;


        StringRequest stringRequest = new StringRequest(Request.Method.GET, URL,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        try {


                            JSONArray jArray = new JSONArray(response);
                            for (int i = 0; i < jArray.length(); i++) {
                                JSONObject jsonObject = jArray.getJSONObject(i);
                                String StartDate = jsonObject.getString("StartDate").substring(0, 10);
                                String Title = jsonObject.getString("Title");


                                try {
                                    Date date = simpleDateFormat.parse(StartDate);

                                    Log.d("Date ", "" + date);
                                    CalendarDay day1 = CalendarDay.from(date);
                                    System.out.println("DAY1" + day1);
                                    Event event = new Event(date, Title, StartDate);
                                    cal = Calendar.getInstance();
                                    cal.setTime(date);
                                    int month = cal.get(Calendar.MONTH);
                                    int year = cal.get(Calendar.YEAR);
                                    if (!map.containsKey(month)) {
                                        List<Event> events = new ArrayList<>();
                                        events.add(event);
                                        map.put(month, events);


                                    } else {
                                        List<Event> events = map.get(month);
                                        events.add(event);
                                        map.put(month, events);

                                        //Collections.reverse(events);
                                        //rever

                                    }


                                    calevents.add(day1);

                                } catch (ParseException e) {
                                    e.printStackTrace();
                                }


                            }


                            cal = Calendar.getInstance();
                            int month = cal.get(Calendar.MONTH);
                            // int year=cal.get(Calendar.YEAR);
                            List<Event> event = map.get(month);
                            if (event != null && event.size() > 0)
                                adapter.addItems(event);
                            //Collections.reverse(event);
                            listView.setAdapter(adapter);
                            EventDecorator eventDecorator = new EventDecorator(Color.RED, calevents);
                            calendarView.addDecorator(eventDecorator);

                        } catch (JSONException e) {
                            makeText(getContext(), "Fetch failed!", LENGTH_SHORT).show();
                            e.printStackTrace();
                        }

                        //
                    }

                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                makeText(getContext(), error.toString(), LENGTH_LONG).show();
            }
        }) {

            @Override
            public Map<String, String> getHeaders() throws AuthFailureError {
                Map<String, String> headers = new HashMap<String, String>();
                headers.put("Authorization", "Bearer " + access_token);
                headers.put("Content-Type", "application/x-www-form-urlencoded");
                return headers;
            }

 @Override
    public void onMonthChanged(MaterialCalendarView widget, CalendarDay date) {


        Calendar cal = Calendar.getInstance();
        cal.setTime(date.getDate());
        int month = cal.get(Calendar.MONTH);
        int year = cal.get(Calendar.YEAR);
        List<Event> event = map.get(month);


        List<Event> event1 = map.get(year);

        if (event != null && event.size() > 0) {
            adapter.addItems(event);
            // adapter.clearItems(event);
            System.out.println("Adapter" + adapter);

        } else {
            adapter.clearItems(event);
            // event.clear();
        }

      /*  if (event1 != null && event1.size() > 0)
            adapter.addItems(event1);
        else
            adapter.clearItems(event1);
         */

        widget.invalidateDecorators();

    }

获取图片

在这里，事件将在2016年6月显示

如何在日期而不是特定日期清除列表？需要帮助

Answer 1

尝试添加此内容，创建hashmap以获取年份

 private HashMap<Integer, List<Event>> map = new HashMap<>();
    private HashMap<Integer, String> map1 = new HashMap();


   try {
                                    Date date = simpleDateFormat.parse(StartDate);
                                    // Log.d("Date ", "" + date);
                                    CalendarDay day1 = CalendarDay.from(date);
                                    Event event = new Event(date, Title, StartDate);
                                    cal = Calendar.getInstance();
                                    cal.setTime(date);

                                    int month = cal.get(Calendar.MONTH);
                                    System.out.println("MOnth" + month);
                                    int year = cal.get(Calendar.YEAR);

                                    map1.put(year, "");


                                    System.out.println("map1" + map);
                                    if ((!map.containsKey(month)) && (!map.containsKey(year))) {
                                        List<Event> events = new ArrayList<>();
                                        events.add(event);
                                        map.put(month, events);
                                        map1.put(year, "");


                                        System.out.println("Year" + year);


                                    } else {
                                        List<Event> events = map.get(month);
                                        events.add(event);
                                        map.put(month, events);
                                        map1.put(year, "");
                                        System.out.println("Year" + year);

                                        //Collections.reverse(events);
                                        //rever

                                    }


                                    calevents.add(day1);


                                } catch (ParseException e) {
                                    e.printStackTrace();
                                }


    @Override
    public void onMonthChanged(MaterialCalendarView widget, CalendarDay date) {


        Calendar cal = Calendar.getInstance();
        cal.setTime(date.getDate());
        int month = cal.get(Calendar.MONTH);
        int year = cal.get(Calendar.YEAR);
        List<Event> event = map.get(month);
        String event1=map1.get(year);
        //   List<Event> event1 = map1.get(year);
        System.out.println("OUT" + (event != null && event.size() > 0));

        if ((event != null && event.size() > 0) && (event1 != null )) {
            adapter.addItems(event);
            System.out.println("Adapter" + adapter);


        } else {


            adapter.clearItems(event);
            // event.clear();
        }
        widget.invalidateDecorators();

    }

列表显示在日历中具有相同月份的年份

1 个答案: