CODEWITHSUNDEEP
androidsdk
Shoham
Shoham

Reputation: 1109

Why are AsyncTask threads running one after the other?

I am offloading many background operations (like web access, and DB operations) to AsyncTasks in order to make my application run faster. It partially works, because the UI does not hang. But it still takes the app a long time to settle (i.e. finish the background tasks).

When looking at the logcat I noticed that all the background tasks (AsyncTask) run one after the other. No concurrency. How can one write a truly multi-threaded application?

Upvotes: 1

Views: 610

Answers (1)

Shoham
Shoham

Reputation: 1109

Reading the AsyncTask's documentation you can see that indeed Android runs all non-main-thread tasks in a single thread. See "order of execution" in http://developer.android.com/reference/android/os/AsyncTask.html

But there you also have the solution: use executeOnExecutor(java.util.concurrent.Executor, Object[]) with THREAD_POOL_EXECUTOR.

Upvotes: 3

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