Kostya,
Part of my problem is that I do not know enough to understand the
documentation. In this specific documentation I got lost when it said:
publishProgress(...
setProgressPercent(....
showDialog(.....
I do not know what those lines mean. I type them in my code, they are
not recognized and produce errors in my editor. (eclipse)
(I am studying. I have ordered new books. etc)
Thanks, John Brown
On Mar 28, 11:26 am, Kostya Vasilyev <[email protected]> wrote:
> John,
>
> You can use this method:
>
> http://developer.android.com/reference/android/os/AsyncTask.html#publ......)
>
> > This method can be invoked from |doInBackground(Params...)| to publish
> > updates on the UI thread while the background computation is still
> > running. Each call to this method will trigger the execution of
> > |onProgressUpdate(Progress...)| on the UI thread.
> > |onProgressUpdate(Progress...)| will note be called if the task has
> > been canceled.
>
> ... and its twin brother, onProgressUpdate:
>
> > Runs on the UI thread after |publishProgress(Progress...)| is invoked.
> > The specified values are the values passed to
> > |publishProgress(Progress...)|.
>
> -- Kostya
>
> 28.03.2011 21:21, john brown ?????:
>
>
>
>
>
>
>
>
>
> > I have a process, getNextBook, that takes maybe 5 or 20 seconds,
> > depending on the size of the next book. It works OK but I need to
> > inform the user that "I'm working, just wait" so they will not tell
> > the App to do something else before the getNextBook process finishes.
> > (the code for "something else" is not included for the sake of
> > simplicity). I have included the display of a ProgressDialog so the
> > user can see when it is working and when it finishes. I have
> > experimented until I got it to work but there is something I do not
> > understand. The code is abbreviated for the sake of simplicity and it
> > does work even if I have created some error when I abbreviated.)
>
> > I utilize AsyncTask to make another thread so I will not block the
> > main thread. I want to call the ProgressDialog directly from the
> > AsyncTask getNextBook_T, but I cannot get it to work. Is there a way
> > to implement the ProgressDialog directly from getNextBook_T? Or is it
> > OK (or necessary) to do it indirectly like the code shows?
>
> > Thanks for your help
>
> > <code>
> > package very.long.name.App01;
>
> > import android.app.Activity;
> > import android.app.ProgressDialog;
>
> > public class App01 extends Activity {
> > private ProgressDialog pd;
>
> > /** Called when the activity is first created. */
> > @Override
> > public void onCreate(Bundle savedInstanceState) {
> > super.onCreate(savedInstanceState);
> > setContentView(R.layout.main);
> > }
>
> > public boolean onOptionsItemSelected(MenuItem item) {
> > String strTemp;
> > switch (item.getItemId()) {
> > case R.id.mnuCkSrv:
> > // bla, bla, bla....
> > return true;
> > case R.id.mnuNextBook:
> > pd = ProgressDialog.show(this, "", "Downloading next
> > book...",
> > true);
> > new getNextBook_T().execute();
> > return true;
> > default:
> > return super.onOptionsItemSelected(item);
> > }
> > }
>
> > private class getNextBook_T extends AsyncTask<Void, Void, Integer> {
> > protected Integer doInBackground(Void... arg0 ) {
> > return getNextBook();
> > }
> > protected void onPostExecute(Integer result) {
> > pdDismisser();
> > setDisplay("");
> > }
> > }
>
> > public Integer getNextBook(){
> > // bla, bla, bla....
> > }
>
> > public void pdDismisser(){
> > pd.dismiss();
> > }
>
> > }
>
> > </code>
>
> --
> Kostya Vasilyev --http://kmansoft.wordpress.com
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