Expecting someone geekier

Jim Bennett

Senior Cloud Developer Advocate at Microsoft, Xamarin Certified Developer, author of Xamarin In Action, blogger, speaker, father and lover of beer, whisky and Thai food. Opinions are my own.

Reading, UK
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Contact me:
Xamarin In Action
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The Jim And Tonic Show
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Binding the Cognitive Services Android Speech SDK - Part 3 - Java 8 fun

Featured Jim Bennett 10 Sep 2018 xamarin, Technology, xamarin.android, java, binding, aar, jar, COMPILETODALVIK, invalid opcode ba, invokedynamic

In the first part of this post, I showed how to get started binding the Microsoft Cognitive Services speech API. In the second part I showed how to make the code look more C#-like. In this part, I'll show how to use it and fix up a nasty issue with the Android compiler and using jars created with the latest versions of Java. Using the SDK To use th…

Binding the Cognitive Services Android Speech SDK - Part 2, making the code more C#-like

Featured Jim Bennett 10 Sep 2018 Technology, xamarin, xamarin.android, java, binding, aar, jar

In the first part of this post, I showed how to get started binding the Microsoft Cognitive Services speech API. In this part I show how to make the code look more C#-like. In the third part I'll show how to use it and fix up a nasty issue with the Android compiler and using jars created with the latest versions of Java. Making the namespaces more…

Binding the Cognitive Services Android Speech SDK - Part 1, binding the library

Featured Jim Bennett 09 Sep 2018 Technology, xamarin, xamarin.android, java, binding, aar, jar

As part of the Microsoft Cognitive Services speech API, there is a native Java Android SDK available as an .aar file. I wanted to use this in a Xamarin app, so I created a binding project for it. The code for this is available in my GitHub. Binding an SDK is a four step process: Create the binding project with the relevant jar or aar file Make any…

Running AI models on iOS, Android and Windows using Xamarin

Featured Jim Bennett 20 Jul 2018 xamarin.forms, AI, windows, iOS, Android, onnx, nuget, technology, xamarin

I created a NuGet package a while ago to allow you to run models exported from the Azure Custom Vision service on iOS and Android in Xamarin apps from your cross-platform code. You can read about this here. Since then, the Custom Vision service has added ONNX export, meaning you can now run these models on-device on Windows as well. This meant it…

Running custom vision models on a Windows device

Featured Jim Bennett 20 Jul 2018 xamarin, technology, windows, custom vision, AI, onnx

Recently I wrote about creating AI models using the Azure Custom Vision Service. In these posts I looked at creating and training models, running them online, then finally exporting the models to run on iOS using CoreML and Android using TensorFlow. Recently Microsoft announced another way to export models - as ONNX models that can be run using Win…

Setting iOS permission descriptions in Visual Studio 2017

Featured Jim Bennett 05 Jul 2018 xamarin, xamarin.ios, technology, docs

I spend most of my developer day using Visual Studio for Mac, but occasionally I flip back to Visual Studio 2017 on Windows. Last time I flipped back I tried to build an app that uses the camera and I got stuck on one simple thing - setting the camera usage description. If you double click on the info.plist file in an iOS app project, it will open…

What the @ - fixing weirdness in return JSON from Azure functions using F#

Featured Jim Bennett 19 Jun 2018 fsharp, f#, azure, functions, technology

I've been playing a lot with F# recently, both to build Xamarin apps using Elmish.XamarinForms and for some Azure Functions. Whilst building an HTTP trigger I came across some weirdness when serializing a record type to JSON. This is the relevant parts of my code: type Output = { TotalBalance : float } let Run(req: HttpRequestMessage, boundTable: I…

Describing a photo in a mobile app using Azure Computer Vision

Featured Jim Bennett 30 May 2018 xamarin, xamarin.forms, AI, computer vision

I recently gave an introduction to Xamarin talk at Imperial College, London and wanted to build a cool app to show off what you can do on mobile using the awesome Cognitive Services available on Azure. I only had about 30-40 minutes to not only introduce Xamarin, but build an app so I decided to throw together a simple app to take a photo and descr…

Xamarin in Action is now on the bookshelves!

Featured Jim Bennett 21 May 2018 xamarin, book, xamarin in action, technology

Finally, after 2 years since I first put pen to paper (well, put keystroke to Atom), Xamarin in Action is done and available from your favorite bookseller as a printed, paper book, with a forward from my good friend, the amazing James Montemagno! You can buy this book in one of two ways - an eBook in PDF, kindle, iBook format, or a prin…

Xamarin Essentials

Featured Jim Bennett 08 May 2018 xamarin, technology, iOS, Android, nuget, Xamarin.Essentials

TL;DR - check out Xamarin Essentials in the official documentation. Like a lot of developers, I love how Xamarin allows me to share business logic between iOS and Android apps, and share UI using Forms, but still have access to the native APIs. But one thing has been missing - a consistent, out of the box way of accessing native APIs from cross-pla…

Building mobile apps in F# using Xamarin.Forms and Elmish

Featured Jim Bennett 06 May 2018 xamarin, xamarin.forms, technology, f#, fsharp, elmish

FSharp and Xamarin Xamarin is well known for allowing you to build mobile apps in C#, but you can use F# as well. F# is fully supported by the compiler and toolchains in both Visual Studio 2017 and Visual Studio for Mac. It's also pretty much supported by all the Xamarin tools including Xamarin.Forms (except for one bug that should be fixed soon).…

The Jim and Tonic show

Featured Jim Bennett 02 May 2018 technology, microsoft, jim and tonic, podcast, cda

Since starting at Microsoft as a Senior Cloud Developer Advocate I've been hugely privileged surrounded on a daily basis by some of the most awesome people across a wide range of developer communities - the rest of the Cloud Developer Advocacy team. These are engineers who constantly work to make the world amazing for developers across a wide range…

Face identification with Azure FaceAPI

Featured Jim Bennett 02 Mar 2018 xamarin, AI, azure, cognitive services, xamarin.forms, nuget, technology, api, faceapi

Recently I've been playing with a lot AI and seeing how it can be used in mobile apps to enhance the experience offered to the user. Currently I am playing with facial recognition using the Azure Cognitive Services FaceAPI. This is a stupidly powerful API that can do a LOT of different things: Detect faces in images Analyze those faces to detect ch…

Identifying my daughters toys using AI - Part 5, Plugin for on-device models

Featured Jim Bennett 26 Feb 2018 xamarin, xamarin.ios, xamarin.android, xamarin.forms, Tensorflow, AI, CoreML, nuget, custom vision, cognitive services, azure, technology

In the first part of this series I used the Azure Custom Vision service to create an image classifier to allow me to easily identify my daughters cuddly toys. Once created I tested it by uploading an image and seeing what tags the classifier found for the image. In the second part I accessed this model from a Xamarin app, so that I could use the ca…

Expecting someone geekier

Jim Bennett

Binding the Cognitive Services Android Speech SDK - Part 3 - Java 8 fun

Binding the Cognitive Services Android Speech SDK - Part 2, making the code more C#-like

Binding the Cognitive Services Android Speech SDK - Part 1, binding the library

Running AI models on iOS, Android and Windows using Xamarin

Running custom vision models on a Windows device

Setting iOS permission descriptions in Visual Studio 2017

What the @ - fixing weirdness in return JSON from Azure functions using F#

Describing a photo in a mobile app using Azure Computer Vision

Xamarin in Action is now on the bookshelves!

Xamarin Essentials

Building mobile apps in F# using Xamarin.Forms and Elmish

The Jim and Tonic show

Face identification with Azure FaceAPI

Identifying my daughters toys using AI - Part 5, Plugin for on-device models

Identifying my daughters toys using AI - Part 4, using the models offline on Android

Binding the Cognitive Services Android Speech SDK - Part 3 - Java 8 fun

Binding the Cognitive Services Android Speech SDK - Part 2, making the code more C#-like

Binding the Cognitive Services Android Speech SDK - Part 1, binding the library

Running AI models on iOS, Android and Windows using Xamarin

Running custom vision models on a Windows device

Setting iOS permission descriptions in Visual Studio 2017

What the @ - fixing weirdness in return JSON from Azure functions using F#

Describing a photo in a mobile app using Azure Computer Vision

Xamarin in Action is now on the bookshelves!

Xamarin Essentials

Building mobile apps in F# using Xamarin.Forms and Elmish

The Jim and Tonic show

Face identification with Azure FaceAPI

Identifying my daughters toys using AI - Part 5, Plugin for on-device models

Identifying my daughters toys using AI - Part 4, using the models offline on Android