Xamarin.Forms.Platform.WinPhone.FormsApplicationPage.OnDeactivated null...
When the application loses his focus (e.g. open the browser) following exception will be thrown: System.NullReferenceException: Object reference not set to an instance of an object. at...
View ArticleBug in Picker? Observing weird behavior (code included)
I am having some trouble updating a Picker with new content and wondering if I'm experiencing a bug? I have a xaml page with two pickers; Picker1 and Picker2. They are bound to a viewmodel using the...
View ArticleTabbedPage Tabs Height
Hi everyone, I'm developing an Android application for mobile phone. I'm using Xamarin Forms and Android 5 Lollipops (AppCompat v7). I've got a XF TabbedPage, and i'm wondering if it's possible to...
View Articlesystem.argumentexception: an item with the same key has already been added
I know this is avery general error, but I suddenly cannot debug my xamarin forms application anymore on my iOS device: system.argumentexception: an item with the same key has already been added any...
View ArticleDisplayActionSheet crashes the app, when user touches outside to cancel....
var action = await App.Current.MainPage.DisplayActionSheet(t.SiteName + "\n" + t.AddressLine1, "Cancel", null, "Continue" , "Open");
View ArticleHow to create In-App Notification Toasts in Xamarin Forms
I'm currently receiving APNS and GCM Push Notifications Out-of-App in Xamarin Forms, however have a story for In-App Notifications as well. Presently, I'm catering for ContentPages, or ContentPages in...
View ArticleWebView not showing html web page in simulator
I have the following xaml `<?xml version="1.0" encoding="utf-8" ?> <ContentPage.Content> <!--<Label x:Name="message" Text="here" VerticalOptions="Center" HorizontalOptions="Center"...
View ArticlelistView ViewCell not adjusting it's size to content on iOS
I have a custom ViewCell that i use to populate a listView. It works like a charm on android, on iOS however i'm having issues. The cell has a Horizontal stackLayout with a box and a 2nd stackLayout,...
View ArticleProgressBar IOS height
Hi all, Below is my custom renderer (in case it helps anyone) for a progress bar (IOS). Is there a way to increase its height? I can't find a way to do that, I've already changed the color. [assembly:...
View ArticleSaving application state
Is it possible to save application state when the orientation is changed or app is "minimized". Android examples do not preserve it when orientation changes and are open in the main activity instead.
View ArticleLocalize in Shared Project
I saw this tutorial http://developer.xamarin.com/guides/cross-platform/xamarin-forms/localization/ But I can't make RESX file in shared project, so I can't also localize app. How should I localize app...
View ArticleTrying to release but build errors on NSMutableDictionary
Its been about 2 months since my last release, but trying to build one now I get. path/MTOUCH: Error MT2002: Failed to resolve "System.Void...
View ArticleHow to read windows phone screen lock timeout settings
Is there a way to read the windows phone screen lock timeout settings? I want to read that for how long the user has set the screen lock timeout duration.
View ArticleHyperlink for Windows phone
I want to display EULA text on login page. The EULA text should appear as hyperlink, so that user can click and read it. I have used the Lable control var tapGestureRecognizer = new...
View ArticleXamarin.Forms.Labs.Mvvm - App OnResume how to reload the page
I have successfully implemented the OnResume on my xamarin forms app (PCL) we are building , OnResume works fine. My issue is: OnAppearing() I load data from sqlite db and show them , and once the user...
View Articleawait in iOS device
Hi, I am making an app and have an await call in my login page. Basically the async method is run when a button is clicked and in this method it awaits a login method that verifies and sets my...
View ArticlePicker Control sometimes does not render the 'Done' button
Environment: Win7 Visual Studio 2013, build for iOS 8.2 Xamarin v 1.5.1.6471 (this also happened in my previous version 1.4.4.6387) iOS 9.1 and OSX 10.9.5 I have a page with about 30 controls in a...
View ArticleXamarin.Forms GetUser using REST call with username and password (MVC 5...
I am trying to consume a REST service in a Xamarin.Forms PCL app. The REST service is a claims-based, Individual Accounts MVC 5 API. More information on that here....
View ArticleAndroid keyboard and the ContentPage view collapsing/expanding issue w/...
Hi, after I upgraded to 1.5.1 and getting material design in place, my app is working and looking great in Android. HOWEVER the view when focussing or unfoccusing the keyboard does not work as...
View ArticleDynamic ListView row height not working on iOS in v1.4?
According to the Xamarin ListView documentation, if I set HasUnevenRows, all will be well with dynamic row heights. In reality, it works fine on Android, but does not work at all on iOS. In my...
View Article