Developing mobile applications for Android, iOS, and Universal Windows Platform (UWP) can be a complex task. However, with the right tools and expertise, you can create seamless experiences across multiple platforms. In this article, we'll explore how to manage screen lock status in Xamarin Forms applications using Xamarin Essentials.
The ScreenLock class is a powerful tool available at the Xamarin.Essentials API. This feature allows developers to request keeping the screen from falling asleep when the application is running. By leveraging this feature, you can create customized experiences that cater to your users' needs.
To get started with developing a Xamarin Forms app, you'll need the following tools:
- Windows 10 (recommended)
- Visual Studio 2017
- Android API 19 or higher and UWP 10.0.16299.0 or higher
Once you have these tools in place, follow these steps to develop your app:
Step-by-Step App Development
Step 1: Create a New Project
Open Visual Studio 2017 and start by creating a new project. Select Cross-Platform under Visual C# > Mobile App (Xamarin.Forms) and give your app a suitable name (e.g., XamFormScreenLock). Click OK to create the project.
Step 2: Add Platforms and Code Sharing Strategy
Select the Cross-Platform template as a Blank APP, set the platform to Android and UWP, and choose .NET standard as your code sharing strategy. Visual Studio will create three projects (Portable, Android, and UWP).
Step 3: Add Xamarin.Essentials Reference
Right-click on your solution (XamFormDialer) and select Manage NuGet Packages. Search for Xamarin.Essentials, select the package, and install it in all three projects (portable, Android, and UWP).
Step 4: Design Your User Interface
Add Label and Button controls to your MainPage.Xaml file to display a title, lock status, and change status button.
`xml
`
Step 5: Add Code to Your MainActivity.cs
In your XamFormScreenLock.Android project, add the following code in the onCreate() method:
`csharp
Xamarin.Essentials.Platform.Init(this, savedInstanceState);
`
Also, add the OnRequestPermissionsResult() method:
`csharp
public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults) {
Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);
base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
}
`
Step 6: Add Code to Your Mainpage.Xaml.cs
Add the following namespace and code:
`csharp
using Xamarin.Essentials;
protected override void OnAppearing() {
base.OnAppearing();
}
void btnChangeLock_Click(object sender, System.EventArgs e) {
ToggleScreenLock();
}
public void ToggleScreenLock() {
try {
if (!ScreenLock.IsActive) {
ScreenLock.RequestActive();
lblScrStat.Text = "Screen Lock Status is " + (ScreenLock.IsActive).ToString() + " and Request active is working ";
} elseif(ScreenLock.IsActive) {
ScreenLock.RequestRelease();
lblScrStat.Text = "Screen Lock Status is " + (ScreenLock.IsActive).ToString() + " and Request Release is working";
}
} catch (Exception ex) {
lblScrStat.Text = "NOt working";
// Other error has occurred.
}
}
`
Step 7: Deploy Your App
Deploy your app in UWP and Android. The output of the XamFormScreenLock App will be:
- With Screen Lock Request Release in Android
- With Screen Lock Request Active, after clicking the CHANGE LOCK STATUS button in Android
- With Screen Lock Request Release in Android
By following these steps, you've successfully tested screen lock status changes in Xamarin Forms application using Xamarin Essentials for Android and Universal Windows Platform using Visual C# and Xamarin.
In this article, we explored how to manage screen lock status in Xamarin Forms applications using Xamarin Essentials. This feature allows developers to create customized experiences that cater to their users' needs. By leveraging this feature and following the steps outlined above, you can unlock swift app development for Android, iOS, and UWP platforms.