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So, we have walked through both Android
and iOS, but we have not shared any code.

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00:00:07,440 --> 00:00:12,180
We wrote the same code in both platforms
to calculate the number of pizzas.

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00:00:12,180 --> 00:00:16,200
So let's start by creating
a service to do the calculations.

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00:00:16,200 --> 00:00:20,014
In the shared project,
create a pizza calculation service, and

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add a Calculate method.

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00:00:41,737 --> 00:00:48,080
The Calculate method uses a string
as a parameter and returns a string.

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00:00:48,080 --> 00:00:53,300
So we can move the int parsing calculation
and response into this method.

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00:00:53,300 --> 00:00:56,787
We could also modify it to return
a more informative response.

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00:01:43,686 --> 00:01:45,446
Now we'll go back to the Android project.

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00:01:48,166 --> 00:01:52,314
In the main activity,
new up a pizzaCalculatorService, and

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00:01:52,314 --> 00:01:55,518
add the calculate to
the click event delegate.

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00:02:58,467 --> 00:03:02,714
In the iOS project, the ViewController
has a similar event handler for

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TouchUpInside, which can also be changed
to use the pizzaCalculatorService.