Как создать ListView с настраиваемыми строками в виджетах Xamarin

Question

Мне нужна помощь в обновлении списка виджетов xamarin с пользовательскими строками. Я нашел несколько примеров, но до сих пор не работает. Это мой код.

[BroadcastReceiver(Label = "@string/widget_name")]  
[IntentFilter(new string[] { "android.appwidget.action.APPWIDGET_UPDATE" })] 
[MetaData("android.appwidget.provider", Resource = "@xml/widget_word")] 

public class WordWidget : AppWidgetProvider 
{ 
    public override void OnUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds)  
    { 
     int N = appWidgetIds.Length; 
     for (int i = 0; i < N; ++i) 
     { 
      RemoteViews remoteViews = updateWidgetListView(context, appWidgetIds[i]); 

      appWidgetManager.UpdateAppWidget(appWidgetIds[i], remoteViews); 
     } 
      base.OnUpdate(context, appWidgetManager, appWidgetIds); 
    } 
    private RemoteViews updateWidgetListView(Context context, int appWidgetId) 
    { 
      RemoteViews remoteViews = new RemoteViews(context.PackageName, Resource.Layout.widget_word); 

      Intent svcIntent = new Intent(context, typeof(WidgetService)); 

      svcIntent.PutExtra(AppWidgetManager.ExtraAppwidgetId, appWidgetId); 
      svcIntent.SetData(Android.Net.Uri.Parse(svcIntent.ToUri(IntentUriType.Scheme)));   
      remoteViews.SetRemoteAdapter(appWidgetId, Resource.Id.listViewWidget, svcIntent); 
      remoteViews.SetEmptyView(Resource.Id.listViewWidget, Resource.Id.empty_view); 

      return remoteViews; 
     } 
    } 

base.OnUpdate (контекст, appWidgetManager, appWidgetIds); -> в этой строке моего приложения виджет врежется

моей службы UpdateWidget:

[Service(Permission = "android.permission.BIND_REMOTEVIEWS", Exported = false)] 
public class WidgetService : RemoteViewsService 
{ 
    public override IRemoteViewsFactory OnGetViewFactory(Intent intent) 
    {    
     int appWidgetId = intent.GetIntExtra(AppWidgetManager.ExtraAppwidgetId, 
     AppWidgetManager.InvalidAppwidgetId); 

     return (new ListWidgetProvider(this.ApplicationContext, intent)); 
    } 

} 

public class ListWidgetProvider : RemoteViewsService.IRemoteViewsFactory 
{ 
    private Intent intent; 

    List<MarketDataParams> DataList = new List<MarketDataParams>(); 
    private Context context = null; 
    private int appWidgetId; 

    public ListWidgetProvider(Context context, Intent intent) 
    { 
     this.context = context; 
     this.intent = intent; 
     appWidgetId = intent.GetIntExtra(AppWidgetManager.ExtraAppwidgetId, AppWidgetManager.InvalidAppwidgetId); 
    } 


    public bool HasStableIds 
    { 
     get 
     { 
      throw new NotImplementedException(); 
     } 
    } 

    public RemoteViews LoadingView 
    { 
     get 
     { 
      throw new NotImplementedException(); 
     } 
    } 

    public int ViewTypeCount 
    { 
     get 
     { 
      throw new NotImplementedException(); 
     } 
    } 

    public IntPtr Handle 
    { 
     get 
     { 
      throw new NotImplementedException(); 
     } 
    } 

    public int Count 
    { 
     get 
     { 
      return DataList.Count(); 
     } 
    } 

    private void populateListItem() 
    {      

    } 


    public long GetItemId(int position) 
    { 
     return position; 
    } 

    public RemoteViews GetViewAt(int position) 
    { 
     WidgetData wd = new WidgetData(); 
     string w_data = wd.GetSecurities(); 
     string f_data = wd.GetUserFivoritList(); 
     ArrayList listItemList = new ArrayList(); 

     MarketData secData = JsonConvert.DeserializeObject<MarketData>(w_data); 
     MarketData fivData = JsonConvert.DeserializeObject<MarketData>(f_data); 
     var updateViews = new RemoteViews(context.PackageName, Resource.Layout.widget_word); 

    if (secData.data.Count > 0) 
     { 
      foreach (var item in secData.data) 
      { 
       MarketDataParams DataParams = new MarketDataParams(); 
       DataParams.Name = item.Name; 
       DataParams.Fields.LastDealRate = item.Fields.LastDealRate; 
       DataParams.Fields.DailyNISRevenue = item.Fields.DailyNISRevenue; 
       DataParams.Fields.BaseRateChangePercentage = item.Fields.BaseRateChangePercentage; 
       DataParams.Id = item.Id; 
       DataList.Add(DataParams); 
      } 

     } 

     updateViews.SetTextViewText(Resource.Id.blog_title,DataList[0].Name); 
     updateViews.SetTextViewText(Resource.Id.creator, DataList[0].Fields.BaseRate); 

     return updateViews; 
    } 

    public void OnCreate() 
    { 
     throw new NotImplementedException(); 
    } 

    public void OnDataSetChanged() 
    { 
     throw new NotImplementedException(); 
    } 

    public void OnDestroy() 
    { 
     throw new NotImplementedException(); 
    } 

    public void Dispose() 
    { 
     throw new NotImplementedException(); 
    } 
} 

Answer 1

https://github.com/Nailik/AppWidgetListView - хороший пример для реализации ListView