AsyncTask cancelling issue

I have a AsyncTask and the doInBackground method is implementing something which takes more time in general. So I am doing two Async Tasks and when the second one starts, I want to stop the first one.

Thus, if I have

@Override
protected Bitmap doInBackground(Integer... params) {
  books.download(13);
}

And the heavy part happens in the download(int) method actually.

Now, when I do cancel(true) on this task, i want the download开发者_如何学编程ing to stop. Thus I want the books.download(13) method to get interrupted.

Any way to do that?

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Android does not interrupt your method, you have to do that. cancel(bool) invokes the method onCancelled(bool). If you don't implement this method, nothing happens.