Every Smartphone has some features which are defined by OS manufacturer. OS manufacturer provide these features for programmer’s ease, so you can use it externally in your App. From different point you can assume that, OS manufacturer restricts programmer to alter their predefined service/code.
Every Smartphone OS has these features with their different names. Though, we are focusing on Windows phone.
And, in Windows phone we call it Launcher and Chooser.
One of the basic differences between two is,
Launcher will launch Windows Phone Service instantly and without returning any value. Whereas, Chooser will launch Windows phone Services and it will return some value back to the code.
SMS Compose Service is a type of Launcher where you can send SMS to the specified number. It’s not the responsibility of code to get back the returned data from the Launcher. So, SMS Sending has completed or not is handled by itself Launcher.
Where, Chooser will detect the returned data and can be handled latter. For instance, you are choosing a contact from Contact Chooser, and the chooser will return the selected contact back to the code.
In short, Choosers are those services from which we are getting something in return but in launcher we will launch the Service only without any expectation to get any value in return.
For now, it is enough but we will elaborate different kinds of Launcher and Chooser latter in this article.
First, we go for Launchers:
Before adding any Launcher Task, you make sure that you have a Microsoft.Phone.Tasks namespace in your project.
There is a common way to handle all the Launcher in Windows phone.
Just follow these simple steps,
Step 1: Create the Object of desired Launcher.
Step 2: Assign the value to predefined Object’s field or call the methods. (Use Intelisense always ;))
Step 3: Call the Show() method to launch the Launcher.
Following are the Launchers used in Windows Phone :
EmailComposeTask : Launch the Compose-Email Task.
So, we have a Button where we implement the EmailComposeLauncher,
private void button1_Click(object sender, RoutedEventArgs e)
{
EmailComposeTask compose = new EmailComposeTask(); // Creation of Object
compose.To = "[email protected]"; // Assigning the Value for 'TO' field
compose.Subject = "C# Corner Windows Phone Tutorial"; //Assiginig 'SUBJECT' Value
compose.Body = "Hello I 'm testing my New Launcher App Tutorial"; //Assigning 'BODY' value
compose.Show(); //At last, we call the Show() method to Launch
}
WebBrowserTask : Launch the Default Web Browser to open the specified URL.
private void button2_Click(object sender, RoutedEventArgs e)
{WebBrowserTask web = new WebBrowserTask(); // Creation of WebBrowser's Object
web.Uri = new Uri("http://google.com", UriKind.RelativeOrAbsolute); // uri fields accepts URI type only
web.Show(); // ultimately, we call the Show() method
}
SmsComposeTask : Launch the SMS Composer of your Windows phone.
private void button3_Click(object sender, RoutedEventArgs e)
{SmsComposeTask sms = new SmsComposeTask(); // Creation of Object
sms.To = "9933495533"; // Assign the 'To' and 'Body' field
sms.Body = "Hello C# Corner";
sms.Show(); //Call the Show() method to Launch
}
PhoneCallTask : Launch the Phone Dialer. Or, You can call someone using code.
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