Download E-books Xamarin Cross-platform Application Development - Second Edition PDF

By Jonathan Peppers

Develop production-ready purposes for iOS and Android utilizing Xamarin

About This Book

  • Write local iOS and Android functions with Xamarin.iOS and Xamarin.Android respectively
  • Learn options that let you percentage code among iOS and Android
  • Design person interfaces that may be shared throughout Android, iOS, and home windows mobilephone utilizing Xamarin.Forms

Who This booklet Is For

If you're a developer with adventure in C# and are only moving into cellular improvement, this can be the e-book for you. in case you have adventure with computing device functions or the net, this publication offers you a head commence on cross-platform development.

What you are going to Learn

  • Learn Apple's MVC layout pattern
  • Understand the Android task lifecycle
  • Share C# code throughout systems and speak to local Objective-C or Java libraries from C#
  • Get to grips with unit checking out for cellular applications
  • Implement an internet provider with Azure cellular Services
  • Deploy and debug your program on cellular devices
  • Submit your app to the Apple App shop and Google Play

In Detail

Developing a cellular software for only one platform is turning into something of the previous. businesses count on their apps to be supported on either iOS and Android, whereas leveraging the simplest local positive aspects on either. Xamarin's instruments aid ease this challenge by means of giving builders a unmarried toolset to focus on either platforms.

This publication is a step by step advisor to construction real-world functions for iOS and Android. The ebook walks you thru construction a talk program, whole with a backend internet provider and local positive factors corresponding to GPS situation, digital camera, and push notifications. also, you are going to tips on how to use exterior libraries with Xamarin and Xamarin.Forms to create shared person interfaces and make app-store-ready functions. This moment variation has been up to date with new screenshots and exact steps to supply you with a holistic evaluate of the hot good points included in Xamarin three. via the tip of the booklet, you have won services to construct at the techniques realized and successfully enhance a market-ready cross-platform application.

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IntentService" extends-generic-aware="android. app. IntentService" final="false" name="CampaignTrackingService" static="false" visibility="public"> find out how to repair the problem here's to alter the bottom category to the Xamarin. Android definition for IntentService. upload the subsequent code to Metadata. xml: mono. android. app. IntentService This alterations the extends characteristic to take advantage of the IntentService present in Mono. Android. dll. I situated the Java identify for this type by means of commencing Mono. Android. dll in Xamarin Studio's meeting Browser. let us take a look at the sign in characteristic, as proven within the following screenshot: to examine the *. dll documents in Xamarin Studio, you purely need to open them. you can even double-click on any meeting within the References folder on your venture. for those who construct the binding venture now, we are left with one final blunders, that's as follows: GoogleAnalytics. monitoring. CampaignTrackingService. cs(24,24): mistakes CS0507: 'CampaignTrackingService. OnHandleIntent(Intent)': can't switch entry modifiers while overriding 'protected' inherited member 'IntentService. OnHandleIntent(Android. content material. Intent)' (CS0507) (GoogleAnalytics. Droid) in the event you navigate to the api. xml dossier, you'll discover the definition for OnHandleIntent as follows: we will be able to see the following that the Java procedure for this type is public, however the base category is safe. So, find out how to repair this can be to alter the C# model to safe to boot. Writing an XPath expression to compare it is a bit extra advanced, yet fortunately Xamarin has an ideal way to retrieve it. if you happen to double-click at the blunders message within the mistakes pad of Xamarin Studio, you will see the subsequent remark within the generated C# code: // Metadata. xml XPath strategy reference: path="/api/package[@name='com. google. analytics . monitoring. android']/class[@name='CampaignTrackingService'] /method[@name='onHandleIntent' and count(parameter)=1 and parameter[1][@type='android. content material. Intent']]" replica this worth to direction and upload the next to Metadata. xml: protected Now, we will be able to construct the undertaking and get 0 mistakes and 0 warnings. The library is now prepared to be used inside your Xamarin. Android tasks. although, should you begin operating with the library, become aware of how the parameter names for the tools are p0, p1, p2, etc. listed here are a number of strategy definitions of the EasyTracker classification: public static EasyTracker GetInstance(Context p0); public static void SetResourcePackageName(string p0); public digital void ActivityStart(Activity p0); public digital void ActivityStop(Activity p0); you could think how tricky it'd be to devour a Java library with no figuring out the correct parameter names.

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