James Montemagno (Page 20) - James Montemagno

Xamarin.Forms: Java.Lang.IllegalStateException

Since this one keeps coming up time and time again I figured I would write a quick blog about it. The dreaded: Java.Lang.IllegalStateException: Can not perform this action after onSaveInstanceState. that keeps crashing your application. What is it, why is it happening, and how do you fix it. This actually can happen in non-Xamarin.Forms Android applications, but it seems to keep coming up in the Forums and in GitHub due to the heavy use of async/await, plugins, and developers attempting to nav…

James Montemagno

Visual Studio - Unable to launch Google Android Emulators

When developing with Xamarin in Visual Studio you have a lot of options for Android Emulators. You can go with the VS Emulators for Android powered by Hyper-V, Genymotion, or the out of the box x86 HAXM powered Android Emulators from Google (a few are installed for you already). It looks though that with some of the latest updates to Windows and VS when you go to launch them you get an error message that they can’t be launched. If you look at the logs you will see something like this: Error me…

James Montemagno

Getting Started With & Learning C#

In 2006, after years of writing C++ and Java code, while attending UAT an instructor named Phil Miller introduced me to this amazing language called C# and changed my life. It was love at first “Hello World” and I have never looked back. C# is an extremely powerful, mature, and extremely cross-platform programming language that I have been using for decades. The beauty of C# of course is that you get this amazing cross-platform framework called .NET, which gives developers ability to perform RES…

James Montemagno

Cross Platform Photos with Media Plugin

After months of work, contributions, code reviews, testing, new operating system releases, and tons of awesome new features the brand new Media Plugin for Xamarin and Windows [http://github.com/jamesmontemagno/mediaplugin] is ready for mass consumption. Not matter how your developing your applications with Xamarin or Xamarin.Forms you can easily have your users take or pick photos and videos from shared code! Here is the easiest example of taking a photo and displaying it in a Xamarin.Forms i…

James Montemagno

Motz's Thoughts: Nintendo Switch

Last week something extremely interesting happened, when Nintendo was able to keep the announcement for their new console completely secret. They launched a short 3 minute 36 second trailer for their new console, the Nintendo Switch, and no one had any idea. No one knew the shape of the console, but the concept, joysticks, price, specs, games, name, or just about anything else besides the single rumor that it may be a “hybrid” that could bridge portable and home console. To me and to other this…

James Montemagno

Updating Azure Mobile SQLiteStore to 3.0

If you are using Azure Mobile Apps [https://github.com/Azure/azure-mobile-apps-net-client] as a backend for your Xamarin and Windows apps you may have seen a very fancy new 3.0 release pop up in NuGet. This is a super important update for the NuGet that brings in the amazing SQLite.raw [https://github.com/ericsink/SQLitePCL.raw] to ensure compatibility with changes in Android N [https://blog.xamarin.com/preparing-for-native-library-linking-changes-in-android-n/] . So what is new? Well accordin…

James Montemagno

Preparing Machines for Xamarin Cycle 8/iOS10/AndroidN

Today is the day for Android N, iOS 10, and new awesome release for both Xamarin Studio and Visual Studio with the latest release of Xamarin. All of this great support is now available in the stable channel and you may have already been prompted to update, but wait just one minute! This release has huge updates for iOS and Android that will require you to update Xcode, JDK, Android Tools, and a bunch more. The team at Xamarin has done an amazing job of documenting all of the requirement that you…

James Montemagno

Fix for Unsupported major.minor version 52.0

So, you just downloaded and installed Xamarin and ready to build your first Android application in C#. You select file -> new Android project and then build and get ready to run it on a simulator and BOOM it has either just deployed a beautiful “hello world” app… or you have some cryptic error message about an appt.exe error or more likely a unsupported version 52.0? WHAT? 99.9% of developers probably had this work just fine, but perhaps you already had Android Studio installed or you acci…

James Montemagno

Tags

Xamarin.Forms: Java.Lang.IllegalStateException

Visual Studio - Unable to launch Google Android Emulators

Getting Started With & Learning C#

Cross Platform Photos with Media Plugin

Motz's Thoughts: Nintendo Switch

Updating Azure Mobile SQLiteStore to 3.0

Preparing Machines for Xamarin Cycle 8/iOS10/AndroidN

Fix for Unsupported major.minor version 52.0

James Montemagno

Tags