You just fundamentally shouldn't be taking a long time in onCreate() etc. If you are taking long enough in there to desire a progress dialog, you are taking too long.
On Sun, Mar 29, 2009 at 8:40 AM, [email protected] < [email protected]> wrote: > > Hi all, > > I have a main activity that launches a sub activity when the user > clicks a button as follows: > > private OnClickListener buttonDirectoryListener = new OnClickListener > () { > public void onClick(View v) { > Intent intent = new Intent(); > intent.setClass(Main.this, Sub.class); > startActivity(intent); > } > } > > Unfortunatly, the onCreate method of the sub activity can take a long > time (server request, xml parsing, custom layout creation, ...). So I > want to display an indeterminate ProgressDialog while the sub activity > is being created and then dismiss it when main activity is no longer > visible. I found a few threads claiming that a separate thread > is needed to run the progress dialog. So I updated my code as follows: > > ProgressDialog pd; > > private OnClickListener buttonDirectoryListener = new OnClickListener > () { > public void onClick(View v) { > pd = new ProgressDialog(this); > pd.setIndeterminate(true); > pd.show(); > new Thread() { > public void run() { > Intent intent = new Intent(); > intent.setClass(Main.this, Sub.class); > startActivity(intent); > } > }.start(); > } > } > > @Override > public void onStop() { > super.onStop(); > pd.dismiss(); > } > > It seems to work sometime. But most of the time, the ProgressDialog is > not showing (or disappareing fastly), I only get a black sreen until > the sub activity is shown. Poor effect. I guess it might lead to an > ANR dialog in real situation. I guess the main activity receives > onStop event before the sub activity is shown. I would like to > indicate loading through the ProgressDialog until the sub activity > gets ready to be displayed. > > I'm convinced other developers are facing such a problem and I'm > probably doing something wrong. Any help is welcome. Thanks. > > > -- Dianne Hackborn Android framework engineer [email protected] Note: please don't send private questions to me, as I don't have time to provide private support. All such questions should be posted on public forums, where I and others can see and answer them. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
