Hi Mark,
Thanks for the quick response. If I update the visibility of the "loading" and "main" views in the UI thread once my background thread is done, won't I have the same problem since I'll still be in onCreate() method and thus no visual impact can be observed until *after* onCreate() returns ? Emre > Date: Mon, 10 Aug 2009 12:35:57 -0400 > From: [email protected] > To: [email protected] > Subject: [android-developers] Re: Calling setContentView() more than once in > method onCreate() ? > > > Emre A. Yavuz wrote: > > > > Hi, > > > > I was wondering whether anybody has tried calling setContentView() more > > than once in method onCreate() when creating an Activity. It seems only > > the last view is displayed. Or am I missing something here ? > > > > Say we have an Activity: > > > > * public* *class* SampleActivyt *extends* Activity { > > > > @Override > > > > * public* *void* onCreate(Bundle savedInstanceState) { > > > > * super*.onCreate(savedInstanceState); > > > > setContentView(R.layout./layout1/); > > > > // DO SOMETHING HERE .... and when it is done change the view > > > > setContentView(R.layout./layout2/); > > > > } > > } > > setContentView() does not have visual impact until *after* onCreate() > returns. If you call it twice, the net is that the user will only see > the second. > > Moreover, if "DO SOMETHING HERE" is long enough to warrant a loading > screen, you *do not* want to be doing that work in onCreate(), anyway. > Use AsyncTask or something else to put it in a background thread. > > > You can think of it as you have a "loading" screen while a > > computation is being done and once it's finished the view needs to be > > changed. > > Use a FrameLayout to put your loading screen and the main view in one > layout. Set the main view to be android:visibility="gone" in the layout > file. Once your background thread is done doing its work, in the UI > thread (e.g., onPostExecute() in AsyncTask), make the loading screen be > View.GONE and your main view to be View.VISIBLE. > > -- > Mark Murphy (a Commons Guy) > http://commonsware.com | http://twitter.com/commonsguy > > Looking for Android opportunities? http://wiki.andmob.org/hado > > > _________________________________________________________________ Send and receive email from all of your webmail accounts. http://go.microsoft.com/?linkid=9671356 --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
