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Enabling Phone Calls
6:01In this video, we'll enable our app to make phone calls to our favorite pizza joint.
Our pizza calculator service now
doesn't have the correct signature.
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So we need to create a phone
dialer to pass into it.
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The context, like I said,
is also our activity.
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So we can just pass in this.
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Let's run the Android app and
see how it looks.
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First, we must set as our
StartUp Project the Android project.
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It's already selected our
preferred device to debug.
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Now that our Android emulator is up and
running, we can enter a value, calculate.
0:45
You see our new message with 11 pizzas,
and we can call.
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You notice the call button
didn't do anything.
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That's because we didn't
add an event to it.
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Back in the main activity,
let's add an event to the call button.
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We'll use our pizzaCalculatorService.
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And call our pizza parlor.
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Now if we run it again.
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We enter the number of people.
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We get our message.
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And when we call,
we get the call dialogue.
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Now let's do the same thing for iOS.
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In the phone dialer for iOS, we'll need to
have a handle on the UI View Controller so
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that we can interact with the interface.
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So let's pass it into the constructor.
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Now that we have a handle
on the UI View Controller,
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we can implement the Call method.
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We will also need to create a URI here.
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Using the iOS framework.
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And with iOS, we first wanna test to
see if we can actually open this URI.
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So if we can open the URI,
it will just open.
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But because we put a not sign here,
if it doesn't open,
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we can handle it in a different way.
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We'll use an alert controller.
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To create a message.
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I've given this alert controller
a title and a message.
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Now we need to indicate the style.
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If we wanna close this dialogue,
we'll have to handle the OK button, but
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in this case we're just
going to close the dialogue.
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