So, I have an app that writes and POSTs a .xml file to the web. However, my app obviously freezes up when its working so I realise I need to put all this in a dedicated thread or something. I have been reading up on the subject a bit, but I am still struggling to make it work. All I want to do is show a loading ProgressDialog (not the one with the loading bar, but just a spinning circle).

Can anyone give me some help? My code is pretty simple. When the user press the "upload" button, the app just runs the "do_update ();" routine.

Thanks

This should do the trick...

Thanks mate, much appreciated!

I now call new DoInBackground().execute(); and the progressDialog shows, however, seemingly when its supposed to dismiss, I get a force close!

Any ideas?

EDIT: Pretty sure it has something to do with the do_update() method. I tried changing it to a couple of others, most of them also resulted in a force close but a few did work. (Methods that hardly do anything). The do_update method downloads a echo output from a php script and sets it as text in a text view..

EDIT: Commented out the two lines where the method sets the text of the text view and such and then it worked.

EDIT: I placed the text in a variable and updated the text view text in protected void onPostExecute(Void v) instead. Worked like charm! Thank you so much!

Hey, Thanks for the codes but can anyone tell me how to modify it for the use of in this context , i realise the other is made for a button or something else??

Code: Select all



public class ASYNC extends ListActivity {
   public String hello = "";
   public boolean source = false;
   final Context ab = this;

   public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      Bundle extras = getIntent().getExtras();
      hello = extras.getString("selection");
      source = extras.getBoolean("Searchbox");

      DoInBackground.execute();
   

   }






   private class DoInBackground extends AsyncTask<Void, Void, Void> {

      private ProgressDialog dialog;

      protected void onPreExecute() {

         dialog = ProgressDialog.show(makan_list_results.this, "",
               "Busy...", true, true, (OnCancelListener) this);

      }

      protected Void doInBackground(Void... v) {
         do_update();
         return null;
      }

      protected void onPostExecute(Void v) {
         dialog.dismiss();
      }


   }

   public void do_update() {
      
      
         try {
            
            //my methods here
            //   GETTING XML N SETTING XML DATA IN TO LISTactivity

         } catch (Exception e) {

            // error msg

         }
      }
      

}



Currently the problem i face is that when i cannot compile as there is an error on the line ( DoInBackground.execute(); )

Cannot make a static reference to the non-static method execute(Void...) from the type AsyncTask<Void,Void,Void>

My other codes are working fine before the implementation of AsyncList.

Please advise
Teck Chai

Oh btw, Eclipse user here, 2.2 API level. Yogurt FTW

Maybe this will help you, it's a pretty good german Tutorial on threading:
http://androidprojects.wordpress.com/20 ... roid-apps/
If you don't speak german, just post here again and I'll do my best to share my knowlegde I earned through that tutorial!

you shouldnt (can not?) reference the dialog outside of the view, you need to create a message handler and show/dismiss the dialog from within the view (handler). send a message to the handler to update the progress dialog that way.

hi all, androidprojects.wordpress.com moved to http://android-project.de. visit http://android-projects.de/2010/08/13/threading-in-android-apps/ for the multithreading tutorial