If you aren't using the android:configChanges tag on your activity in the AndroidManifest.xml then you application is getting killed and restarted on rotation or keyboard changes like when someone slides out a hardware keyboard. When this happens, you need to save off the position in your AsyncTask and restart it back when the activity gets restarted.
Or you can simple add something like android:configChanges="orientation|keyboardHidden" to your activity in the AndroidManifest.xml and then your activity won't be killed and restarted. You can then override the onConfigurationChanged method to see when these things happen if you want to know. Check this for more info: http://developer.android.com/guide/topics/manifest/activity-element.html#config If you are using properly flowing layouts, most of the time you won't even have to do anything at all. If you need specific layouts for portrait and landscape, the android:configChanges may make things more complicated than just saving off the status of your AsyncTask and restarting it from that point. Steven Studio LFP http://www.studio-lfp.com On Monday, October 3, 2011 12:25:58 PM UTC-5, Bluemercury wrote: > > Hi! im using an Async-Task and currently im using runOnUiThread in the > doInBackground method to refresh activities UI, this seems to be working but > on rotation it loses the data and im usng the > getLastNonConfigurationInstance and the onRetainNonConfigurationInstance > methods, here's the parent class method that calls the async task: > > > /** > * do asynctask for background work > */ > public void doAsyncTask(){ > //get task back in case of rotation > task= (QuadrosMobileActivityTask)getLastNonConfigurationInstance(); > > if(task==null){ > task= new QuadrosMobileActivityTask(this); > task.execute(); > //add to the set of tasks > QuadrosMobileApplicationContext appliContext= > (QuadrosMobileApplicationContext)getApplicationContext(); > appliContext.getAsyncTasks().add(task); > }else{ > task.attach(this); > } > } > > Here's the async task as normal class(non inner class) main methods; > > @Override > protected void onPreExecute() { > Logger.write("QuadrosMobileActivityTask ", " AsyncTask pre execution "+ > "Current Activity: "+activity.getClass().getName(), Logger.INFO); > > if(QuadrosMobileActivity.themeId!=R.style.CustomThemeNoHeader){ > > activity.findViewById(R.id.progressView).setVisibility(ProgressBar.VISIBLE); > } > QuadrosMobileActivity.progressBarstate=ProgressBar.VISIBLE; > } > > @Override > protected String doInBackground(Void... params) { > Logger.write("QuadrosMobileActivityTask ", "initialized", Logger.INFO); > return activity.*updateResultsInUi()*; > } > > @Override > protected void onPostExecute(String result) { > Logger.write("QuadrosMobileActivityTask ", " AsyncTask post execution > "+"Current Activity: "+activity.getClass().getName(), Logger.INFO); > > if(activity!=null) > Toast.makeText(activity, result, Toast.LENGTH_LONG).show(); > //remove this task from collection > QuadrosMobileApplicationContext appliContext= > QuadrosMobileApplicationContext.getInstance(); > appliContext.getAsyncTasks().remove(this); > > //check if there's more tasks in the collection > if(appliContext.getAsyncTasks().isEmpty()){ > if(QuadrosMobileActivity.themeId!=R.style.CustomThemeNoHeader){ > activity.findViewById(R.id.progressView).setVisibility(ProgressBar.GONE); > } > QuadrosMobileActivity.progressBarstate=ProgressBar.GONE; > } > } > > And the sub activities *updateResultsInUi() *method: > > runOnUiThread( > new Runnable() { > > @Override > public void run() { > ((TextView)findViewById(R.id.nome_value)).setText(quadro.getNome()); > > //((TextView)findViewById(R.id.nif_value)).setText(quadro.getDadosPessoais().getNumeroContribuinte()); > > ((TextView)findViewById(R.id.datanasc_value)).setText(DateTimeZoneUtils.getInstance().sqlLiteDateTimeFormat(quadro.getDadosPessoais().getDataNascimento())); > > ((TextView)findViewById(R.id.provincia_value)).setText(quadro.getResidencia().getProvincia()); > > ((TextView)findViewById(R.id.municipio_value)).setText(quadro.getResidencia().getMunicipio()); > > ((TextView)findViewById(R.id.comuna_value)).setText(quadro.getResidencia().getComuna()); > > ((TextView)findViewById(R.id.bairro_value)).setText(quadro.getResidencia().getBairro()); > > ((TextView)findViewById(R.id.rua_value)).setText(quadro.getResidencia().getRua()); > } > } > ); > > Can i use the runOnUIThread method inside the doInBackground method of > AsyncTask?? > regards, > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
