How to make the application window maximized by default - xamarin.forms

Question

How I can make my Xamarin.Forms UWP application have its main window maximized upon its launch?

Answer 1

You should use this answer: Maximize UWP app window on launch as #Dishant says but you should add this code to method OnLaunched into App class into App.xaml.cs file of your project UWP and add correct namespaces like this:
using Windows.Graphics.Display;
using Windows.UI.ViewManagement;
sealed partial class App : Application
{
/// <summary>
/// Initializes the singleton application object. This is the first line of authored code
/// executed, and as such is the logical equivalent of main() or WinMain().
/// </summary>
public App()
{
this.InitializeComponent();
this.Suspending += OnSuspending;
}
/// <summary>
/// Invoked when the application is launched normally by the end user. Other entry points
/// will be used such as when the application is launched to open a specific file.
/// </summary>
/// <param name="e">Details about the launch request and process.</param>
protected override void OnLaunched(LaunchActivatedEventArgs e)
{
Frame rootFrame = Window.Current.Content as Frame;
/* ************** CALL METHOD HERE ************** */
MaximizeWindowOnLoad();
// Do not repeat app initialization when the Window already has content,
// just ensure that the window is active
if (rootFrame == null)
{
// Create a Frame to act as the navigation context and navigate to the first page
rootFrame = new Frame();
rootFrame.NavigationFailed += OnNavigationFailed;
Xamarin.Forms.Forms.Init(e);
if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
{
//TODO: Load state from previously suspended application
}
// Place the frame in the current Window
Window.Current.Content = rootFrame;
}
if (rootFrame.Content == null)
{
// When the navigation stack isn't restored navigate to the first page,
// configuring the new page by passing required information as a navigation
// parameter
rootFrame.Navigate(typeof(MainPage), e.Arguments);
}
// Ensure the current window is active
Window.Current.Activate();
}
/* ************** SEE HERE ************** */
private void MaximizeWindowOnLoad()
{
var view = DisplayInformation.GetForCurrentView();
// Get the screen resolution (APIs available from 14393 onward).
var resolution = new Size(view.ScreenWidthInRawPixels, view.ScreenHeightInRawPixels);
// Calculate the screen size in effective pixels.
// Note the height of the Windows Taskbar is ignored here since the app will only be given the maxium available size.
var scale = view.ResolutionScale == ResolutionScale.Invalid ? 1 : view.RawPixelsPerViewPixel;
var bounds = new Size(resolution.Width / scale, resolution.Height / scale);
ApplicationView.PreferredLaunchViewSize = new Size(bounds.Width, bounds.Height);
ApplicationView.PreferredLaunchWindowingMode = ApplicationViewWindowingMode.PreferredLaunchViewSize;
}
/// <summary>
/// Invoked when Navigation to a certain page fails
/// </summary>
/// <param name="sender">The Frame which failed navigation</param>
/// <param name="e">Details about the navigation failure</param>
private void OnNavigationFailed(object sender, NavigationFailedEventArgs e)
{
throw new Exception("Failed to load Page " + e.SourcePageType.FullName);
}
/// <summary>
/// Invoked when application execution is being suspended. Application state is saved
/// without knowing whether the application will be terminated or resumed with the contents
/// of memory still intact.
/// </summary>
/// <param name="sender">The source of the suspend request.</param>
/// <param name="e">Details about the suspend request.</param>
private void OnSuspending(object sender, SuspendingEventArgs e)
{
var deferral = e.SuspendingOperation.GetDeferral();
//TODO: Save application state and stop any background activity
deferral.Complete();
}
}