Xamarin.Forms- Send SMS Using Xamarin Essentials

In this blog, you will learn how to Send SMS Using Xamarin.Essentials in Xamarin forms. 

Introduction

Xamarin.Forms code runs on multiple platforms - each of which has its own filesystem. This means that reading and writing files is most easily done using the native file APIs on each platform. Alternatively, embedded resources are a simpler solution to distribute data files with an app.

Xamarin.Essentials 

Xamarin.Essentials plugin provides 20+ cross-platform APIs for  mobile application development. Xamarin.Essentials API works with all Xamarin.Forms, Xamarin.Android, Xamarin.iOS, or UWP application that can be accessed from shared code. When we are developing Xamarin with Android, iOS and UWP apps but now Xamarin.Essentials overcome the problem, developers can access every native platform API using C#. This plugin provides many APIs so initially, there is no need of more plugins for Xamarin. Xamarin.Essentials plugin impacts your app's minimum size.


Platform Support

Xamarin.Essentials supports platforms and operating systems

Platform         Version

Android         4.4 (API 19) or earlier
iOS                10.0 or higher
UWP         10.0.16299.0 or earlier


Prerequisites

• Visual Studio 2017(Windows or Mac)

Setting up a Xamarin.Forms Project

Start by creating a new Xamarin.Forms project.  you’ll learn more by going through the steps yourself.
Choose the Xamarin.Forms App Project type under Cross-platform/App in the New Project dialog.

Name your app, select “Use Portable Class Library” for shared code, and target both Android and iOS.

You probably want your project and solution to use the same name as your app. Put it in your preferred folder for projects and click Create.

You now have a basic Xamarin.Forms app. Click the play button to try it out.

Setting up the User Interface

Go to MainPage.Xaml and write the following code.

MainPage.xaml

Click the play button to try it out.

Add Xamarin Essentials

In this step, add Xamarin.Essentials to your project. You can install Xamarin.Essentials via NuGet, or you can browse the source code on GitHub.

Go to Solution Explorer and select your solution. Right-click and select "Manage NuGet Packages for Solution". Search "Xamarin.Essentials" and add Package. Remember to install it for each project (PCL, Android, iO, and UWP).

Xamarin.Essentials requires platform-specific setup

Android

The following steps are necessary for Android.

1. Xamarin.Essentials supports a minimum Android version of 4.4
2. Target Android version for compiling must be 8.1, API level 27.

In the Android project's MainActivity that is launched Xamarin.Essentials must be initialized in the OnCreate method.

MainActivity.cs

Xamarin.Essentials must receive any OnRequestPermissionsResult. write the following code for runtime permission.

MainActivity.cs

iOS

No additional setup required.

UWP

No additional setup required.


Limitation

• It supports the devices only, not Simulator/Emulator

In this step, write the following code for sending SMS

MainPage.xaml.cs

using Xamarin.Forms;
using Xamarin.Essentials;
namespace XamarinEssentials
{
    public partial class MainPage : ContentPage
    {
        public MainPage()
        {
            InitializeComponent();
        }
        protected override void OnAppearing()
        {
            base.OnAppearing();
        }

        async void btnSendSms_Clicked(object sender, System.EventArgs e)
        {
            if(!string.IsNullOrEmpty(txtNumber.Text))
            {
                await SendSms(txtMessage.Text,txtNumber.Text);
            }

        }

        public async Task SendSms(string messageText, string recipient)
        {
            try
            {
                var message = new SmsMessage(messageText, recipient);
                await Sms.ComposeAsync(message);
            }
            catch (FeatureNotSupportedException ex)
            {
                await DisplayAlert("Failed", "Sms is not supported on this device.", "OK");
            }
            catch (Exception ex)
            {
                await DisplayAlert("Failed", ex.Message, "OK");
            }
        }
    }
}

Click the play button to try it out.

I hope you have understood how to Send SMS Using Xamarin Essentials in Xamarin.Forms.
Thanks for reading. Please share comments and feedback.