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Author Archives: Doumer

Xamarin Android Download Manager Advanced Guide

Jul 25, 2021DoumerXamarin, Xamarin.AndroidDownloadManager, Xamarin.Android

Hello Friends, A few weeks ago we talk about downloading files bytes by bytes in Xamarin iOS. That post explained how to use NSUrl to download large files, monitor the download’s progress, and a few more interesting things. Today, we will switch from iOS to Android, and see how to properly download files of all […]

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How to Resolve ImageLoaderSourceHandler: Could Not Retrieve Image or Image Data Was Invalid Uri

Jun 30, 2021Doumer.Net, Xamarin, Xamarin Forms Tips and Tricks, Xamarin.Forms

Hey friends, today we will take a quick look at a little, but annoying problem we still face in Xamarin Forms. I guess you might have come across this error message “[0:] ImageLoaderSourceHandler: Could not retrieve image or image data was invalid: Uri:“. This error is quite simple to identify. Here is how it manifests […]

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An introduction to .Net Interactive

Jun 26, 2021DoumerActivities

A few friends and I hosted another event across several communities in Africa. You can find the event here. We had hundreds of attendees (Across the various meetup groups) and a prestigious guest, the one and only Maria Naggaga, introduced us to .NET Interactive, and how it leverages the power of the .Net framework and […]

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VLC Media Player in Xamarin Forms

Using VLC Media Player in Xamarin Forms Projects

May 16, 2021DoumerActivities

I covered in detail how you can use the VLC media player in your Xamarin Forms application. VLC is a very powerful player, and it permits you to do a lot of awesome stuff and read more file formats than the simple native player of any platform. It is cross-platform and open source. You can […]

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VLC Media Player in Xamarin Forms

VLC Media Player in Xamarin Forms (an Alternative to AvPlayer and Android Media Player)

May 16, 2021DoumerUncategorized

Hi friends welcome back for another post. Today we will talk about playing media in our Xamarin Forms apps. We won’t be using Xamarin Community Toolkit’s media element. Instead, we will use a VLC media player in Xamarin Forms. Why? because VLC media player can be an awesome alternative to the native media players available […]

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Download Data Streams to a File in the Background with Xamarin iOS

Download Files in Xamarin iOS in the Background

Apr 21, 2021Doumer.Net, Xamarin, Xamarin.iOS

Hello Friends, have you ever wanted to download a file from an API to your user’s phone in the background? You might have faced a situation where you want to let your users download very large files from your server. And you want to download these sorts of files in the background. You might have […]

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Firebase push notifications for dotnet

Firebase push notifications for dotnet. Advanced guide

4 Comments
Jan 25, 2021Doumer.Net, .Net Core, Asp.net core, Xamarin, Xamarin Forms Tips and Tricks, Xamarin.Forms

Hello friends, what will a good mobile app be like without push notifications nowadays? No matter if your app is a chat app, a ride-sharing app, or a simple news app, you surely want to keep your users engaged, and let them come back to your app very often. Push notifications have become indispensable if […]

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JWT Social auth with ASP.net core and Xamarin Essentials

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Nov 8, 2020DoumerUncategorized

Hello friends, here is my second post about social auth with Xamarin Forms and ASP.net core. The previous method, though functional is kind of old and less recommended than this new approach. A few months ago, a new feature was added to Xamarin Essentials, permitting us to easily implement authentication with a back-end API (not […]

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JWT Social Auth with ASP.net core and Xamarin Essentials

Nov 7, 2020DoumerActivities

My first video tutorial ever. I decided to try out Youtube as a means of sharing my knowledge. The first topic I cover is JWT social authentication with ASP.net core and Xamarin Essentials. Basically, it shows you how to implement Facebook and Google authentication in the easiest of ways. This video has a blog post […]

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Dotnet Meetup with Scott Hunter as Guest, introducing us to .NET 5

Oct 31, 2020DoumerActivities

A few friends and I hosted an event across several communities in Africa. This event was online and had hundreds of attendees. We had a prestigious guest, the one and only Scott Hunter. He introduced us to the new version of .NET that is “.NET 5”. You can find this event on youtube. We host […]

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