Waiting For A Function To Finish Execution And Using The Results

Here's the scenario I have an activity(A) which has a button and textview. I have another class(B) with methods for performing various functions. After creating an instance of clas

Solution 1:

When you create an instance of class B make sure it takes Context as an argument in its constructor. Then you can try using AsyncTask (Assuming you know it). Then put the time consuming function in doInBackground() and the function which waits for its values in onPostExecute()

Solution 2:

Android development is event driven, you should normally not block threads waiting for a result (at least not the main/ui thread since your application then might be considered as not responding).

It's better to create a callback interface, and let the metod that takes a long time to execute, invoke a method on that inteface when the computation has been completed.

Btw, your post indicates that the computation already is asynchronous? You would otherwise have the result when the method has completed.