James Montemagno
James Montemagno

Live, Love, Bike, and Code.

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James Montemagno

Xamarin.Forms

Building, testing, & shipping My Cadence for iOS in less than a week

My holiday hacking came early this year when I decided to build my own DIY spin bike. Soon, after a few rides, my mind started to swirl with app ideas of how to improve my ride. Then when Apple released Apple Fitness+ without support for displaying cadence information from sensors I knew I had to build an app. That app is My Cadence, which connects to a small cadence sensor and displays the current cadence. It is actually packed full of awesome features including custom themes, in-app purchases,…

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Introducing My Cadence for iOS & Android - a Simple Cadence Sensor Display

It has been nearly 3 weeks since I put together my DIY spin bike and I have now clocked in over 25 rides! Let's just say I am really enjoying have the bike at home now that it is chilly and more rainy outside. Last week I wrote a blog on my experience and did a full Apple Fitness+ review video, in which I mentioned one of the issues I had was the lack of Cadence sensor integration into the app. Knowing your cadence is really important during a ride because it is your RPM that you are spinning th…

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5 Must Install NuGet Packages for New Xamarin Projects

Starting your first project can be a bit overwhelming. I mean heck, I wrote nearly 3,000 words breaking down every bit of what to select and what each option means. Oh, and I also have a full video series walking you through it step by step on my YouTube channel. Before I start writing code in my projects I take some time to configure my projects and then install essential NuGet packages that help me be super productive from the start. Yes, it is true that Xamarin.Forms and Xamarin.Essentials ar…

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Introducing Island Tracker for Animal Crossing New Horizons

tldr; I built a new iOS & Android app called Island Tracker that enables you to track turnip prices, get predictions, and share them with friends. It is available today. Get it on: When Animal Crossing New Horizons launched in late March I fell in love immediately. My wife adopted my Nintendo Switch Lite and we both got copies the night of release. Over on the Nintendo Dispatch podcast, we call it the perfect game at the perfect time. It truly has been for us during this time of staying…

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Animate Anything with Xamarin.Forms

I have been building apps with Xamarin.Forms for nearly 6 years now! I love how it has evolved over the years, added new controls, new features, and simplified everything with Shell. While I think I can build pretty decent apps in general, one thing that I have ¬†always struggled with is animations. The very first release of Xamarin.Forms had a built in animation system to fade, move, and scale any of the controls. These are great and there have been several videos on how to use these: One thing…

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Xamarin.Forms Custom Fonts Simplified & Everywhere

It was just about 1 year ago when I wrote about using font icons for images inside of Xamarin.Forms apps. Well time has flown by and now more than ever is the time to go all in on custom fonts and font icons because with Xamarin.Forms 4.6 everything got so much easier! Custom fonts in Xamarin.Forms ShellSo, let's start off with the basics when it comes to fonts. You usually think about fonts as just a fancy way to display text. However, with resources such as Font Awesome you can use fonts as ic…

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Setting Android Status Bar Background & Icon Colors

Over the past few months, I have been attempting to figure out the best ways to implement a light theme and dark theme in my Hanselman.Forms app. Working closely with my friend Kym Phillpotts we came up with a very nice theme changer for Xamarin.Forms, that allowed us to change all of the colors dynamically. The result is a very nice looking application that allows the users to pick their theme or use system defaults. One thing that bugged me in the original implementation for Android, was th…

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Investing Time in the Xamarin Linker for Smaller App Sizes

When developing an app, 99% of our time goes into writing the code, testing the functionality, and making small UI tweaks to please our end users. Most of this is done in debug mode which optimizes compilation and app size for speed, which makes sense. When we flip that flag to Release with the default settings, we often pay very little attention as to what is happening to our app. We get a nice APK or IPA and ship it up to the app store and we are done. However, if we just spent a little time f…

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I crush code and share it, publish NuGet packages, speak at conferences, upload videos, pretend I am good at playing video games, tweet up a storm, drink gallons of coffee, and ride my bike. Checkout my monthly newsletter that you should subscribe to!