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-----Original Message-----
From: CG <[EMAIL PROTECTED]>
Date: Mon, 8 Sep 2008 10:02:58
To: Android Developers<android-developers@googlegroups.com>
Subject: [android-developers] Re: Alert Dialog never displayed in when call in
the run() method of a separate process.
Thank you very much Huebi and hackbod, for first the solution and
taking the time to explain.
I succeded in doing what I want with Handler.
On Sep 8, 6:28 pm, Huebi <[EMAIL PROTECTED]> wrote:
> Hi,
>
> you can only display UI stuff from the main thread. You can use the
> Handler classes post() method to put the Dialog display in the event
> queue. Just have a look at the API docs.
>
> On 8 Sep., 18:16, CG <[EMAIL PROTECTED]> wrote:
>
> > Hello,
>
> > I am facing a strange issue. I suppose it is due to my bad
> > understanding of processes and compatibilities with processes.
>
> > So here is the behavior I'd like to have :
> > When I open my map, actions are done in background.
> > So I use a progress dialog. For that I need an separate thread.
> > But if an error occurs, I'd like to display a warning pop up. This
> > popup show request is done inside the run method of the separated
> > thread.
>
> > And the warning dialog is never displayed ! I don't understand why.
> > Can anyone explain me what is wrong ?
> > I join my code snippet to give a picture of what i try to do.
>
> > I also check the API demo and try to override the method
> > OnCreateDialog method but with the same result :-(
>
> > I suppose the issue is "when" I call the show().
>
> > ----------------- Code snippet
> > public class StationNearActivity extends MapActivity implements
> > OnClickListener, Runnable {
>
> > /** Called when the activity is first created. */
> > public void onCreate(Bundle icicle) {
>
> > pgd = ProgressDialog.show(this, null,
> > getString(R.string.nearest_station_progress_dialog_wait));
>
> > /*------------------------
> > I create the dialog here
> > -------------------------*/
> > AlertDialog.Builder builder = new AlertDialog.Builder(this);
>
> > builder.setMessage(R.string.nearest_station_gm__popup_no_address_found_label);
> > dlg = builder.create();
>
> > /*------------------------------
> > if I display it there then it works ! But it is not the correct
> > behaviour
> > dlg.show()
> > -----------------------------*/
>
> > super.onCreate(icicle);
> > thisInstance = this;
>
> > mapViewFromXML.setClickable(true);
> > mapViewFromXML.setEnabled(true);
>
> > }
>
> > Thread threadOfMap = new Thread(this);
> > threadOfMap.start();
> > }
>
> > public void run() {
> > Looper.prepare();
>
> > try {
> > Thread.sleep(200);
> > } catch (InterruptedException e) {
> > // TODO Auto-generated catch block
> > e.printStackTrace();
> > }
>
> > // --- Fill the map
> > try {
> > setMapCenter();
> > if (mapCenter == null || (mapCenter.getLatitudeE6() == 0
> > && mapCenter.getLongitudeE6() == 0)) {
>
> > /*------------------------------
> > The "progress dialog dismiss" works but the "dialog show" not !
> > -----------------------------*/
>
> > pgd.dismiss();
> > dlg.show();
> > }
>
> > Log.d("MAP", "add overlay");
> > //....
> > mapViewFromXML.postInvalidate();
>
> > } catch (Exception e) {
> > Log.e(Constant.LOG_NS2_MAP, e.toString(), e);
> > } finally {
> > pgd.dismiss();
> > }
> > }
>
> > }
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