Thank you for your reply!
On Mar 25, 12:44 pm, Marco Nelissen <[email protected]> wrote:
> 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.*/- Hide quoted text -
>
> - Show quoted text -
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