To see the latest version including Azure Mobile Services Online/Offline Sync see: https://github.com/jamesmontemagno/MyExpenses-Sync

Videos are available on Channel 9:

Part 1: Cross Platform Mobile Development with Xamarin

Part 2: Using Portable Class Libraries with Xamarin

Part 3: Cross Platform Mobile Apps with Xamarin and Azure Mobile Services

Expense taking cross platform application for Windows Phone, Android, and iOS built with Xamarin inside of Visual Studio 2013. Expenses are stored locally in a Sqlite-net database. You can add new expenses and edit or delete existing. All business logic is shared in one portable class library.

Written in C# with (Xamarin) Created in Visual Studio 2013

Open Source Project by (@JamesMontemagno)

For Windows Phone you must install SQLite for Windows Phone Extension: http://visualstudiogallery.msdn.microsoft.com/cd120b42-30f4-446e-8287-45387a4f40b7

** For Azure Mobile Services Integration please read the setup at the bottom of this page! **

I have included an "Analysis Project", which will count the shared lines of code. Up to 80% of code is shared across platforms. All of the Models, Services, View Models, and tons of helper classes are all found in one single PCL library.

Everything is written in C# with Xamarin with a base PCL library. This project couldn't have been done without the following:

https://components.xamarin.com/view/json.net - I use both the NuGet in the PCL and component for iOS for facade linking. One of the most wonderful Json libraries that I simply love. It is used to deserialize all information coming from the meetup.com APIs. PCL is also used for this and I reference the portable-net40 folder to ensure iOS works correctly.

https://www.nuget.org/packages/WindowsAzure.MobileServices/ and https://components.xamarin.com/view/azure-mobile-services Used optionally to store data up into Azure and sync between devices! I use the NuGet in Windows Phone and PCL and then the components for each iOS and Android. See below for more information.

https://www.nuget.org/packages/Microsoft.Net.Http - Brings HTTP Client functionality to Windows Phone in PCL.

http://phone.codeplex.com/ - Everyone's favorite WP toolkit!

https://components.xamarin.com/view/AndHUD - Brings in a nice spinner for Xamarin.Android

https://components.xamarin.com/view/btprogresshud - Great spinner for iOS

http://docs.xamarin.com/guides/ios/user_interface/monotouch.dialog/ - A wonderful library for Xamarin.iOS to create user interfaces quick with not a lot of code.

https://github.com/praeclarum/sqlite-net - A wonderful library for cross platform sqlite databases. Now in PCL form with: https://github.com/oysteinkrog/Sqlite.net-pcl

• Create a new Azure Mobile Services Table Called "Expense"

• Follow this guide to setup the Table for Authentication: http://www.windowsazure.com/en-us/develop/mobile/tutorials/get-started-with-users-dotnet/

• Setup Azure Scripts for Insert, Read, Update: http://www.windowsazure.com/en-us/develop/mobile/tutorials/authorize-users-in-scripts-dotnet/

• Setup Twitter App for Authentication: http://www.dotnetcurry.com/ShowArticle.aspx?ID=860

• Optionally you can setup Facebook, Microsoft, or Google, however the sample is setup for Twitter

• Open "AzureService.cs" a shared file in MyEpenses.Android (or iOS or WindowsPhone) and

• Comment Back In & Edit: MobileClient = new MobileServiceClient(

"https://"+"PUT-SITE-HERE" +".azure-mobile.net/",

"PUT-YOUR-API-KEY-HERE");

• This information can be found on Azure

Copyright 2014 Xamarin Inc.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.