Question

我正在编写“时间表应用”，它必须在今天的课程中显示为应用小部件中的listView。

所有数据（所有工作日）都存储在一个名为Data的文件中。应用程序小部件获取Data onCreate，然后填充它们以获取当天的数据。

但是当我向数据文件添加新课程时该怎么办？有没有办法重新创建app小部件，以获取更新的数据？

抱歉我的英语不好。谢谢你的回答

我的RemoteViewsFactory的代码如下：

public class ViewsFactory implements RemoteViewsService.RemoteViewsFactory {
    List data;
    int day;
    private Context ctxt;
    private int appWidgetId;

    public ViewsFactory(Context ctxt, Intent intent) {
        this.ctxt=ctxt;
        appWidgetId=intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
                AppWidgetManager.INVALID_APPWIDGET_ID);
    }

    @Override
    public void onCreate() {
        File file = new File(ctxt.getFilesDir(),"default.txt");

            if(file.exists()){

                ReadFile readFile = new ReadFile(file);
                data = readFile.read();

                Collections.sort(data, new AlphanumComparator());

            }
        }



    @Override
    public void onDestroy() {
        // no-op
    }

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

    @Override
    public RemoteViews getViewAt(int i) {
        RemoteViews row=new RemoteViews(ctxt.getPackageName(), R.layout.row2);
        SharedPreferences settings = ctxt.getSharedPreferences("UserPref", 0);
        if(i==0) { //get week day only once
            Calendar calendar = Calendar.getInstance();
            day = calendar.get(calendar.DAY_OF_WEEK);
            if (day == 1) day = 7;
            else day -= 1;

            SharedPreferences.Editor editor = settings.edit();
            editor.putInt("currentDay", (day - 1)); //save current day for heading
            editor.commit();
        }
        if(settings.getString("Days","").contains(Integer.toString(day-1))&&
           data.get(i).toString().startsWith(Integer.toString(day))&&
           (data.get(i).toString().endsWith(settings.getString("OddEven",""))||data.get(i).toString().endsWith(",X1X2"))) { //filtering


            String[] dataLine = data.get(i).toString().split(",");
            row.setTextViewText(R.id.text1, dataLine[1]); //set texsts
            row.setTextViewText(R.id.text3, dataLine[2]);
            row.setTextViewText(R.id.text4, dataLine[4]);
            row.setTextViewText(R.id.text5, dataLine[6]);


        }
        return(row);
    }

    @Override
    public RemoteViews getLoadingView() {
        return(null);
    }

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

    @Override
    public long getItemId(int position) {
        return(position);
    }

    @Override
    public boolean hasStableIds() {
        return(true);
    }

    @Override
    public void onDataSetChanged() {
        // no-op
    }
}

Answer 1

        AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
        int appWidgetIds[] = appWidgetManager.getAppWidgetIds(
                                   new ComponentName(context, YourWidgetProviderClass.class));
        appWidgetManager.notifyAppWidgetViewDataChanged(appWidgetIds, R.id.<YourListView>);

添加新记录时添加这些行

如何在android中重新创建app小部件

1 个答案: