92 строки
3.6 KiB
C#
92 строки
3.6 KiB
C#
|
using System;
|
|||
|
|
using Windows.ApplicationModel;
|
|||
|
|
using Windows.ApplicationModel.Activation;
|
|||
|
|
using Windows.UI.Xaml;
|
|||
|
|
using Windows.UI.Xaml.Controls;
|
|||
|
|
using Windows.UI.Xaml.Navigation;
|
|||
|
|
|
|||
|
|
namespace XamarinTV.UWP
|
|||
|
|
{
|
|||
|
|
/// <summary>
|
|||
|
|
/// Provides application-specific behavior to supplement the default Application class.
|
|||
|
|
/// </summary>
|
|||
|
|
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;
|
|||
|
|
|
|||
|
|
// 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); // requires the `e` parameter
|
|||
|
|
|
|||
|
|
if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
|
|||
|
|
{
|
|||
|
|
//TODO: Load state from previously suspended application
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Place the frame in the current Window
|
|||
|
|
Window.Current.Content = rootFrame;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (e.PrelaunchActivated == false)
|
|||
|
|
{
|
|||
|
|
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();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <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>
|
|||
|
|
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();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|