Question

I’m trying to implement some functions like file downloading which the download kickoff buttons lie in some list view. To make it more clear, here to illustrate it with graph.

First, I enter Book1_Activity with some list view there:
[book_chapter_name_1 [download_1]]
[book_chapter_name_2 [download_2]]
I clicked download_1 button, and the downloading is kicked off and there is a progress bar which shows the degree of the progress. The downloading is achieved by an AsyncTask.

After that, I’d like to switch to some other activity, let’s say book_read_activity, so that I could download some books while keep reading still.

My problem is after I read the book, when I’d like to check the progress of the downloaded books, so I reentry the Book1_Activity, since Book1_Activity is destroyed and recreated， how could I get the download progress and update it？

Answer 1

Considered using a service instead? Then you could have it running even if closed?
But if you want to go on with your approach I’d have the asynctask write progress to a global access point and then read progress from there.