Wait for multiple AsyncTask to complete

Question

I am parallelizing my operation by splitting it in the exact number of cores available and then, by start the same number of AsyncTask, performing the same operation but on

Answer 1

You should use a CountDownLatch. Here the documentation with examples: java.util.concurrent.CountDownLatch

Basically you give a reference of CountDownLatch to your threads, and each of them will decrement it when finished:

countDownLatch.countDown();

The main thread will wait on the termination of all threads using:

countDownLatch.await();