On Android it's common that during rotations we need to release

any resources we have, and allow our activity to be rebuilt by the system.

This means we need to unsubscribe to all these subscriptions that we've set up.

So here we have our combined latest subscription, and

we also had our clicks for adding new items both of those subscriptions.

We need to unsubscribe to those during on destroy, and

there's a common pattern for doing this, and it's called composite subscription.

So let's go ahead and go up to the top here, and what we're going

to do is we're going to add in a new type called composite subscription.

We're gonna call it subscriptions and create a new composite subscription.

So what this is gonna do is this is going to allow us to merge together or

handle and keep track of all our subscriptions in a single place.

So it's just delegates to all subscriptions we add to it.

So we're gonna do now is add to our current subscriptions to this

composite subscription.

So let's go down here, and where we did our combine latest.

Let's go ahead and do, subscriptions.add,

and add in this entire subscription.

And let's go ahead and

go back up to our clicks, and

go ahead and add this one as well.

Okay, so what we can see is that we added our subscriptions for

our observables to this composite subscription, here and here.

And then what we're gonna do is down and on destroy,

we'll be able to actually unsubscribe to these all together at the same time.

So it's really easy.

We just go down here, and we say subscriptions.unsubscribe.

And that's it.