Question

@Override 
protected InputStream doInBackground(String... url){                
    try {
        InputStream stream = downloadXml(url[0]);
        new ParseXml(stream); //for testing porpuses: outputs ok to logcat
        return stream;
    } catch (IOException e) {
        Log.d("dbg","exception");   
        e.printStackTrace();
        return null;
    }   
}

@Override 
protected void onPostExecute(InputStream result) {
    if (result != null) {    
       new ParseXml(result); //crashes the app                  
    }
    Log.d("dbg","postexecute triggered ok");        
}

Code is pretty self explanatory i think, i tried changing the passing type to just Object and type casted it where needed but it didn’t worked either.

Is there anything undocumented in sdk that i should know of ?

Answer 1

obviously, Crash.. You are doing lengthy (also may be network related) operation in MainUI Thread. as onPostExecute() of AsyncTask runs on In MainUI Thread only. So always keep it in doInBackground().

This code line new ParseXml(result); should be in doInBackground() of AsyncTask.

Update:

So complete the Parsing of XML in doInBackground() and only pass the result in onPostExecute() if only you want to reflect the updation on Application UI.