The UI is not thread safe and calling related methods from a background thread like that run by java.util.Timer can cause trouble. There's a good blog post on ways to schedule work on the UI thread or communicate back to it here: http://android-developers.blogspot.com/2009/05/painless-threading.html
There's also an example of communicating back to the UI thread called "Example ProgressDialog with a second thread" on this page: http://developer.android.com/intl/fr/guide/topics/ui/dialogs.html On Oct 31, 4:42 pm, Anton Pirker <[email protected]> wrote: > Hi android guys and girls! > > I have a really strange problem. I have an activity which displays a map > and a marker with the users current location on that maps. > > Right now my code is something like this: (in onCreate of the activity) > > 1) display a progress dialog with the text "detecting your location, > please wait..." > > 2) request location updates. (activity implements LocationListener) > locationManager.requestLocationUpdates(provider, > (long)Constants.MIN_TIME, (float)Constants.MIN_DISTANCE, this); > > 3) right after the line above i have following: > timer.schedule(new GetLastLocation(this), 5000); > which means: wait 5 sec and then call GetLastLocation().run() > > GetLastLocation looks like this: > > class GetLastLocation extends TimerTask { > private SetupActivity parent; > public GetLastLocation(SetupActivity act) { > parent = act; > } > public void run() { > removeDialog(DIALOG_GET_POSITION); > parent.showMessage(); > } > } > > So if 5 seconds pass by, i dismiss(remove) the dialog i displayed in 1) > > 4) now i want to show an AlertDialog with the message "could not find > your location, taking the last known" > parent.showMessage() looks like this: > public void showMessage() { > Log.e("###", "showMessage 1/2"); > showDialog(DIALOG_GET_POSITION); > Log.e("###", "showMessage 2/2"); > } > > and here the first log message "showMessage 1/2" is printed to the log, > but not the second one "showMessage 2/2". > And there is no exception and nothing that tells me what is wrong... > > Could someone please help me? > Maybe there is a better way to get he location and if no location is > delivered show a message! > > Thankful for every hint, > Anton > > -- > DI(FH) Anton Pirker > > ------------------------------ > cross platform mobile software > burggasse 123/53 > a-1070 wien > tel: +43 699 1234 0 456 > skype: antonpirker > > http://anton-pirker.at -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
