@ zl25drexel
Here is my code, I tried your tutorial, it doesn't work...? I'm
guessing I have something wrong. Where should I call this? Which
function do I call? Sorry, I'm a beginner at this.
// Need handler for callbacks to the UI thread
final Handler mHandler = new Handler();
// Create runnable for posting
final Runnable mUpdateResults = new Runnable() {
public void run() {
chatscreen.append((CharSequence) mHandler);
}
};
protected void chatUpdater() {
// Fire off a thread to do some work that we shouldn't do
directly in the UI thread
Thread t = new Thread() {
public void run() {
// get chat updates
HttpClient updateclient = new
DefaultHttpClient();
HttpPost updatepost = new
HttpPost("https://www.net/chatpost.php?
action=updatechat");
ResponseHandler<String> responseHandler = new
BasicResponseHandler();
String responseBody;
try {
// send message
responseBody =
updateclient.execute(updatepost,
responseHandler);
mHandler.post(mUpdateResults);
} catch (ClientProtocolException e) {
// error sending message
mHandler.post(mUpdateResults);
} catch (IOException e) {
// error sending message
mHandler.post(mUpdateResults);
}
}
};
t.start();
}
On Nov 7, 9:38 am, zl25drexel <[EMAIL PROTECTED]> wrote:
> see my post
> athttp://bend-ing.blogspot.com/2008/11/properly-handle-progress-dialog-...
>
> On Nov 7, 9:30 am, David Given <[EMAIL PROTECTED]> wrote:
>
> > Bobbie wrote:
> > > Hey all, thanks for all your help so far! I have the following
> > > function running on a timer every 20 seconds or so. However, every
> > > time it runs, my user interface for this program (an EditText box and
> > > a submit Button) freezes until the HttpPost is finished. Is there a
> > > way for me to run this function "in the background" or something so it
> > > doesn't freeze the interface? Is there a more efficient way to do
> > > what I'm trying to do here? The "chatscreen" variable is a TextView.
>
> > Yes, run it in another thread --- look up java.lang.Thread. Be aware
> > that methods in another thread can't call anything in the UI directly,
> > though; look up Handler.
>
> > void doSomethingInBackground()
> > {
> > /* Here we're in the UI thread. */
> > final Handler handler = new Handler();
> > Thread thread = new Thread()
> > {
> > public void run()
> > {
> > /* Here we're in the background thread. */
> > /* perform blocking operation here */
> > handler.post(
> > new Runnable()
> > {
> > public void run()
> > {
> > /* Back in the UI thread again. Tell the user we're
> > * finished. */
> > }
> > }
> > );
> > }
> > };
>
> > /* Start background thread, don't wait (will return immediately). */
> > thread.start();
>
> > }
>
> > If you think the syntax is nasty, you're not the only one. Bear in mind
> > that your activity may have finished by the time the thread completes.
> > Also, if you're going to do this a lot, you'll want to reuse the Handler
> > and Thread objects.
>
> > --
> > David Given
> > [EMAIL PROTECTED]
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