I have a terrible bug in my widget. The widget is waken up using an
AlarmManager (the update interval is chosen by users, ranging from 30
mins to 2 hours) to grab some data from the Internet and display it on
the widget. I do not hold a wakelock since if the phone sleeps, just
let it sleeps. There's no way to update the information since nobody
will see it.
If I put the phone in the basement (has no wi-fi or cell signal) for
about an hour. the phone will definitely not update anything.
However, when I get it back from the basement, the cell network could
never be recovered again no matter how long I have waited (it just get
an X on the cell signal icon on the notification bar) that I must
restart the phone. May I know if a partial wake lock must be held on
checking network availability?
Your help is highly appreciated. Please find the code skeleton as
below:
public void onReceive(Context context, Intent intent) {
......
Intent intent = new Intent(context, UpdateAppWidget.class);
context.startService(intent);
......
}
public static class UpdateAppWidget extends Service {
@Override
public void onStart(Intent intent, int startId) {
......
ConnectivityManager cm = (ConnectivityManager)
context.getSystemService(Context.CONNECTIVITY_SERVICE);
if
(cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).isAvailable() ||
cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isAvailable()) {
......Grab something in the net.......
}
......
// Make another alarm for next update
Intent widgetUpdate = new Intent();
widgetUpdate.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
widgetUpdate.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new
int[]{widgetId});
widgetUpdate.setData(Uri.withAppendedPath(Uri.parse(URI_HEADER),
String.valueOf(widgetId)));
PendingIntent newPending =
PendingIntent.getBroadcast(this, 0,
widgetUpdate, pendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarm = (AlarmManager)
this.getSystemService(Context.ALARM_SERVICE);
alarm.set(AlarmManager.RTC,
System.currentTimeMillis() + 1000 *
currentValue, newPending);
// Refresh the widget
manager.updateAppWidget(widgetId, views);
// Kill the service after done
this.stopSelf();
}
}
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