Question

我需要在RemoteViewsFactory类中格式化日期和时间。我知道如何使用DateFormat / SimpleDate格式。我正在执行以下操作，但是按下物理设备上的小部件时，应用程序会继续停止：remoteViews.setTextViewText（R.id.tvTaskDay，DateFormat.getDateInstance（）。format（task.getDay（））） ;

Android - ListView items inside app widget not selectable

我也在父活动中进行格式化，并且可以正常工作。是否可以从那里引用SimpleDateFormat代码？预先谢谢你。

P.S。错误信息。我的RemoteViewsFactory类：

public class ScheduleWidgetViewFactory implements RemoteViewsService.RemoteViewsFactory
{
    private ArrayList<Schedule> mScheduleList;
    private Context mContext;

    public ScheduleWidgetViewFactory(Context context)
    {
        mContext = context;
    }

    @Override
    public void onCreate()
    {
    }

    @Override
    public void onDataSetChanged()
    {
      SharedPreferences sharedPreferences = 
      PreferenceManager.getDefaultSharedPreferences(mContext);

        Gson gson = new Gson();
        Type type = new TypeToken<List<Schedule>>() {}.getType();
        String gsonString = sharedPreferences.getString("ScheduleList_Widget", "");
        mScheduleList = gson.fromJson(gsonString, type);
    }

    @Override
    public int getCount()
    {
        return mScheduleList.size();
    }

    @Override
    public RemoteViews getViewAt(int position)
    {
        Schedule schedule = mScheduleList.get(position);

        RemoteViews itemView = new RemoteViews(mContext.getPackageName(), R.layout.schedule_widget_list_item);

        itemView.setTextViewText(R.id.schedule_widget_station_name, schedule.getStationScheduleName());
        itemView.setTextViewText(R.id.schedule_widget_arrival, DateFormat.getDateInstance().format(schedule.getExpectedArrival()));
        itemView.setTextViewText(R.id.schedule_widget_towards, schedule.getDirectionTowards());

        Intent intent = new Intent();
        intent.putExtra(ScheduleWidgetProvider.EXTRA_ITEM, schedule);
        itemView.setOnClickFillInIntent(R.id.schedule_widget_list, intent);

        return itemView;
    }

    @Override
    public int getViewTypeCount()
    {
        return 1;
    }

父母活动：

 @Override
    public void returnScheduleData(ArrayList<Schedule> simpleJsonScheduleData)
    {
        if (simpleJsonScheduleData.size() > 0)
        {
            scheduleAdapter = new ScheduleAdapter(simpleJsonScheduleData, StationScheduleActivity.this);
            scheduleArrayList = simpleJsonScheduleData;
            mScheduleRecyclerView.setAdapter(scheduleAdapter);
            scheduleAdapter.setScheduleList(scheduleArrayList);

            stationArrival = scheduleArrayList.get(0);

            stationShareStationName = stationArrival.getStationScheduleName();
            stationShareArrivalTime = stationArrival.getExpectedArrival();
            stationShareDirection = stationArrival.getDirectionTowards();

            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
            Date date = null;

            try {
                date = simpleDateFormat.parse(stationArrival.getExpectedArrival());
                date.toString();
            } catch (ParseException e) {
                e.printStackTrace();
            }
            SimpleDateFormat newDateFormat = new SimpleDateFormat("MMM dd, yyyy HH:mm:ss");
            String finalDate = newDateFormat.format(date);

            stationShareArrivalTime = finalDate;

            //Store Schedule Info in SharedPreferences
            SharedPreferences appSharedPrefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
            SharedPreferences.Editor prefsEditor = appSharedPrefs.edit();

            Gson gson = new Gson();
            String json = gson.toJson(scheduleArrayList);
            prefsEditor.putString("ScheduleList_Widget", json);
            prefsEditor.apply();
        }
        else
        {
            emptySchedule.setVisibility(View.VISIBLE);
        }

Answer 1

万一其他人陷入困境。正如Mike M.在评论中指出的那样，RemoteViewsFactory中的DateFormat代码结构与其他地方相同。

 private String stationWidgetArrivalTime;

 @Override
    public RemoteViews getViewAt(int position)
    {
        Schedule schedule = mScheduleList.get(position);

        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
        Date date = null;

        try {
            date = simpleDateFormat.parse(schedule.getExpectedArrival());
            date.toString();
        } catch (ParseException e) {
            e.printStackTrace();
        }
        SimpleDateFormat newDateFormat = new SimpleDateFormat("MMM dd, yyyy HH:mm:ss");
        String finalDate = newDateFormat.format(date);

        stationWidgetArrivalTime = finalDate;

        RemoteViews itemView = new RemoteViews(mContext.getPackageName(), R.layout.schedule_widget_list_item);

        itemView.setTextViewText(R.id.schedule_widget_station_name, schedule.getStationScheduleName());
        itemView.setTextViewText(R.id.schedule_widget_arrival, stationWidgetArrivalTime);
        itemView.setTextViewText(R.id.schedule_widget_towards, schedule.getDirectionTowards());

        Intent intent = new Intent();
        intent.putExtra(ScheduleWidgetProvider.EXTRA_ITEM, schedule);
        itemView.setOnClickFillInIntent(R.id.schedule_widget_list, intent);

        return itemView;
    }

如何在Widget RemoteViewsFactory类中使用SimpleDateFormat？

1 个答案: