post your error messages
On Nov 7, 11:16 am, Bobbie <[EMAIL PROTECTED]> wrote:
> @ 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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