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Android Build a Blog Reader Android App Adapting Data for Display in a List Finishing Our AsyncTask

Posted by Thang Pham Quoc
Thang Pham Quoc
73 Points

How does "onPostExecute" know which JSONObject to work with ?

I don't see any method invocation like : onPostExecute(doInBackground(Object...params)); so how does onPostExecute know which JSONObject to work with ?

1 Answer

haunguyen
haunguyen
14,985 Points

I had similar question while looking up a progressbar method. I think you are referring to an AsyncTask procedure, right?

http://developer.android.com/reference/android/os/AsyncTask.html

If so, onPostExecute method requires 1 parameter (as declared in the method constructor protected void onPostExecute(Long result) )

That parameter is the returned value passed in from the doInBackground method.

Since each async task has 1 doinbackground method (that returns 1 type of value) and 1 onPostExecute method, they are being tracked together.

Thang Pham Quoc
Thang Pham Quoc
73 Points

Thanks a lot. I understand now :)

haunguyen
haunguyen
14,985 Points

no problem, I had the same problem trying to understand these black box codes.