The problem is that your 'backgroundWork()" method is not actually running in the background, but in the main UI thread. You'll need to do the work in a separate thread.
On Tue, Mar 24, 2009 at 8:02 PM, [email protected] <[email protected]> wrote: > > I want to show a ProgressBar while doing some background operation, > but my code seems not to work. I hope someone can help me to solve > this problem. Thank you in advance!Here is my code and explanation : > > public boolean onMenuItemSelected(int featureId, MenuItem item) { > switch(item.getItemId()) { > case CASEONE_ID: > ProgressBar progress = (ProgressBar)findViewById > (R.id.ProgressBar); > progress.setVisibility(View.VISIBLE); > progress.bringToFront(); > progress.invalidate(); > > backgroundWork(); > > progress.setVisibility(View.GONE); > progress.invalidate(); > return true; > } > return super.onMenuItemSelected(featureId, item); > }/*In fact I never see the progressbar by this code, instead the > program will keep frozen until backgroundWork() finish. But what I > want is the progressbar can appear in the screen while backgroungWork > () is being processed. > > private void backgroundWork(){ > for(int i=0;i<1E8;i++); > }/*This is not the exact work I did in my own program. I change it to > this form is just to tell you my operation will occupy the processor > for long time.*/ > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
