Is the AsyncTasks threading the wrong practice?

Question

I am writing an application that does the following:

• Scans a web page and extracts image URLs from it.
• Decodes them before Bitmapand shows them inImageView

I do not want them to run in the user interface thread, and obviously the second point cannot be executed without completing the first.

Can I customize AsyncTasks to achieve this? I mean the beginning of the second of the first method onPostExecute().

Is this considered bad practice? If so, how do I do this?

(this is a theoretical question, I am not asking for code)

Answer 1

, AsyncTasks, . : , .

AsyncTasks . AsyncTasks, . . AsyncTasks.

: AsyncTask. : AsyncTasks? , , . AsyncTask, , .

---

_{, AsyncTasks , . , AsyncTask, , . , , , - - AsyncTask , , , , , , , .}

Answer 2

AsyncTasks ? onPostExecute()

, AsyncTask . , . , .

, ?

. , ExecutorService, /,

Answer 3

, . , , . , : onPreExecute onPostExecute , , doInBackground - - . , AsyncTask doInBackground 1-, onPreExecute onPostExecute . .

Answer 4

, , , .

AsyncTask:

AsyncTasks ( ). , API, java.util.concurrent , , ThreadPoolExecutor FutureTask.

( Promises) - . A - ; .., .

:

Future( calculate and return x).map( consume x and return y)
                               .map ( consume y and so on)

Answer 5

, , . , , , , .