我最终在构造函数中设置了上下文,并从覆盖的运行函数中传递了它。
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
Timer timer = new Timer();
timer.scheduleAtFixedRate(new FetchData(context, appWidgetManager), 1, 30000);
}
private class FetchData extends TimerTask {
RemoteViews remoteViews;
AppWidgetManager appWidgetManager;
ComponentName thisWidget;
Context thisContext = null;
public FetchData(Context context, AppWidgetManager appWidgetManager)
{
thisContext = context;
this.appWidgetManager = appWidgetManager;
remoteViews = new RemoteViews(context.getPackageName(), R.layout.main);
thisWidget = new ComponentName(context, HelloWidget.class);
}
@Override
public void run()
{
String restUrl = TrainFromSki;
remoteViews.setTextViewText(R.id.widget_textview, GetTextData(thisContext, restUrl));
appWidgetManager.updateAppWidget(thisWidget, remoteViews);
}
}
在 GetTextData 中,我执行以下操作以根据设备设置格式化日期:
String jsonDate = "/ Date(1379488920000+0200) /";
String timestamp = jsonDate.split("\\(")[1].split("\\+")[0];
String departure = DateFormat.getTimeFormat(context)
.format(new Date(Long.parseLong(timestamp)));