Category

Xamarin

Simple data validation in Xamarin Forms

In this post I would like to share how I’ve implemented user input data validation in Xamarin Forms. Over the years I’ve tried a few approaches, some with success, others without. This one is an implementation I’ve used in my… Continue Reading →

Get Geo Location in background with Xamarin.Essentials on iOS

Getting the Geo Location by using Xamarin.Essentials doesn’t work when the app is in the background. Let’s see how we can ‘fix’ this (on iOS)! Xamarin.Essentials Xamarin.Essentials is a fantastic library containing many cross-platform APIs for mobile applications. Things like… Continue Reading →

Multi targeting, am I falling in love?

♥Februari is the month of love and friendship. That’s why the Xamarin community is sharing some Xamarin Love every day of this month: Xamarin Month of love and friendship! ♥ A lot has been told the past years about code… Continue Reading →

Fixing AppCenter Android Build Error: /usr/bin/jarsigner failed with return code: 1

Error: /usr/bin/jarsigner failed with return code: 1 This issue bugged me for an entire day. The real sad thing about it is, is that I faced this same issue some months ago… So after I set up my AppCenter Android… Continue Reading →

Using Android Linkify to add inline links to a Xamarin Forms Label

A loooong time ago (at least, this is what it feels like…), I created this custom Xamarin Forms control HyperlinkLabel (Blog post, GitHub repo) that can show one or multiple hyperlinks inline with other text. The links can be defined… Continue Reading →

Image classification with Azure Custom Vision Service and CoreML

In my previous blogpost I created a small PoC to show you how to work with the Azure Custom Vision Service and WinML. In this blogpost we are going to take the same model that I have trained back then,… Continue Reading →

Creating a HyperlinkLabel in Xamarin Forms

I needed a simple control that could show a hyperlink inline with other text and I’d like the link to be defined in markdown. In short, something like this: HyperlinkLabel In Xamarin.Forms, I created a HyperlinkLabel class which isn’t anything more… Continue Reading →

Demos talk “Realm, the cool new kid in Xamarin town”

Last week I gave a talk about Realm at the Xamarin Expert Day in Cologne, Germany. Some people asked me if I could put the code of the demos, that I used in this talk, on a public GitHub Repo. Sharing is caring, of… Continue Reading →

Sharing a Realm via a QR code using ZXing

Realm offers a nice technique to share Realms with other users using the PermissionOffer and the PermissionOfferResponse objects. The idea is that you can provide a token that an other user can use to connect to your data store. In this blogpost we will use this… Continue Reading →

Bind to Xamarin Picker but only update value after hitting Done on iOS

Sometimes you stumble upon these gems that you didn’t know they existed. Like I did today… The ‘problem’ with the Picker You might have noticed that when you are binding to the SelectedItem of a Picker in Xamarin Forms, that on iOS… Continue Reading →

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