How to make a delay after executing requests?

Question

Java

Good afternoon.
I do two asynchronous requests (Retrofit).
The code is placed in the button click handler.
You need to wait for the two enqueue() to complete, make a delay (while the progress bar is displayed) and finally execute the method that takes the parameters changed when the two enqueue() requests are executed.
How to make a delay?

Answer 1

In Java, starting from the eighth version, there is such a thing as Future and their execution queues.
If the version of android you are running supports them, then this is your most obvious decision.
In a more general case, such a queue can be organized independently.
We launched streams, each of them has an empty array (list, circular buffer, whatever) as a parameter, where they write their result.
In the loop, check your filling conditions and as soon as they satisfy you, then exit the loop.

Answer 2

Use RxJava and CombineLatests