AsyncTask is Genius programming but in the docs appears to have
incomplete information. There's not enough to understand how it
works.

--

"onPreExecute(), invoked on the UI thread immediately after the task
is executed."
(I think this should be Before the task is executed.)


"Not all types are always used by am asynchronous task. To mark a type
as unused, simply use the type Void:"

(then it has this as an example - which has nothing to do with Void.)
"private class MyTask extends AsyncTask"

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


+ Juan
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