Show contentpage that called local notification when notification is clicked

问题

I'm relatively new to Xamarin and have gotten to a point in my application where I want to have notifications, I'm using local notifications to show the user that they have received a message from someone in my application. While I can get the notification to show, when it clicks it either shows nothing or it "restarts" the application (takes the user back to the login page).

How do I get the notification to show a set page, such as my contacts page when the notification is clicked on?

回答1:

How do I get the notification to show a set page, such as my contacts page when the notification is clicked on?

Xamarin.Forms only has one activity, no matter how many pages you created, they are created on MainActivity.

But still we can have a workaround to work it out:

Create your local notification with an intent to indicate which page you want to navigate to(Page1):

Notification.Builder builder = new Notification.Builder(Xamarin.Forms.Forms.Context);
Intent intent = new Intent(Xamarin.Forms.Forms.Context, typeof(MainActivity));
Bundle bundle = new Bundle();
// if we want to navigate to Page1:
bundle.PutString("pageName", "Page1");
intent.PutExtras(bundle);
PendingIntent pIntent = PendingIntent.GetActivity(Xamarin.Forms.Forms.Context, 0, intent, 0);
builder.SetContentTitle(title)
       .SetContentText(text)
       .SetSmallIcon(Resource.Drawable.icon)
       .SetContentIntent(pIntent);
var manager = (NotificationManager)Xamarin.Forms.Forms.Context.GetSystemService("notification");
    manager.Notify(1, builder.Build());

In MainActivity.cs inside OnCreate we use reflection to set the App's MainPage:

protected override void OnCreate(Bundle bundle)
{
    TabLayoutResource = Resource.Layout.Tabbar;
    ToolbarResource = Resource.Layout.Toolbar;

    base.OnCreate(bundle);

    global::Xamarin.Forms.Forms.Init(this, bundle);
    var myApp = new App();
    var mBundle = Intent.Extras;
    if (mBundle != null)
    {
        var pageName = mBundle.GetString("pageName");
        if (!string.IsNullOrEmpty(pageName))
        {
            //get the assemblyQualifiedName of page
            var pageAssemblyName = "Your_PCL_Name." + pageName+",Your_PCL_Name";
            Type type = Type.GetType(pageAssemblyName);
            if (type != null)
            {
                var currentPage = Activator.CreateInstance(type);
                //set the main page
                myApp.MainPage = (Page)currentPage;
            }

        }
    }

    //load myApp
    LoadApplication(myApp);
}

Notes: this workaround modifies the MainPage of your PCL's App, if you have usage for this property, please modify the logic properly.

来源：https://stackoverflow.com/questions/47459995/show-contentpage-that-called-local-notification-when-notification-is-clicked

标签

Xamarin

xamarin.android

portable-class-library