You're doing the AsyncTask wrong. Replace your call to
doInBackGround() with execute():
new downloadData().execute();
doInBackground is a callback. You shouldn't be calling it yourself.
Also, you probably want to use a ProgressIndicator to let the user
know you are working. You would do that in the AsyncTask method
onPreExecute() and remove it in onPostExecute.
Best regards,
Brian Cooley
On Jul 21, 9:32 am, Gaelin <[email protected]> wrote:
> My application for the most part prefers to be online, I have of
> course added an offline mode so that it works perfectly well when not
> attached and then re-syncs when connected again. I do, however, have
> an issue with the initial start of the main activity "black screening"
> on me while (i assume) it is waiting on a TCP timeout. It would be
> nice to query and skip the download step if the network is super slow.
>
> Here is pseudo code for what I am doing:
>
> public void OnCreate(...) {
> if( !loggedin )
> showLoginActivity()
> else {
> new downloadData().doInBackground();
> showDataList(m_datalist ); //keep in mind that m_datalist is
> displayable
> }
>
> }
>
> public class downloadData extends AsyncTask<String, Integer, Integer>
> {
> protected Integer doInBackground(Integer... params) {
> //http get of JSON data
> m_datalist = getJSONDataFromServer();
> }
>
> }
>
> The showDataList function creates rows in my list and populates the
> list from the content in m_datalist which has the last valid dataset
> in it at all times. The issue is that it just black screens while
> downloading data even though I have it getting this data in an
> AsyncTask.
>
> The preferred experience would be for the application to draw the list
> and be usable while the download thread retrieves any new
> information. This then gets to my question, if I could detect a slow
> or unresponsive internet connection I could possibly skip the HTTP
> calls until a time where the internet was more healthy.
>
> Ideas?
>
> --G
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