Supercharging your Xamarin app! 3 must use libraries

3 must use libraries

Supercharging your Xamarin app!

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Chris Briggs

@ChrisBriggsy

Senior Software Developer

Blog at

blog.chrisbriggsy.com

Head up IoT at SSW

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Thanking our sponsors

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Make handling transient exception child's play

Save pull your hair when debugging asynchronous errors

Simplify persisting data cross platformAgenda

Stage 0 – Just An idea

• Focus on Features

• Trying to solve a problem

• Anything is possible

• Scope creep

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Stage 1 – Proof of concept

• Build a proof of concept

• Core functionality working

• Probably buggy

• Flesh the app out

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Stage 2 – Beta testing

• Start gathering data

• Start listening to user

feedback

• Realise application is fragile

• Improve the app

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Stage 3 – Set it loose

• Release in to the app store

• Continue gathering data

• Continue listening to user

feedback

• Continue to Improve the app

• Sink or Swim

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Stage 4 – Improving the app by metrics

• The app has been out for a while

• Focus on visibility into the application

• Errors logged + reports

• End user usage

• Performance Metrics

• Store rating trends

• Feature X is not the key feature of the

app but used by 75% of users

• Therefore: We should spend additional time to

polish feature x

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What stage are you at?

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internet connections are unreliable on mobile apps

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What is Polly?

• Express transient exception handling policies in a

fluent manner.

• Retry, Retry Forever, Wait and Retry or

Circuit Breaker

• Works across .NET 3.5 / 4.0 / 4.5 / PCL

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No internet connection

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What is Akavache

• Asynchronous Persistent key-value storage

• Its a way to write data to disk without locking up the

UI of an application.

• Awesome framework for caching data.

• Very useful for storing important data

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Fody. AsyncErrorHandler

• Fody - Extensible tool for weaving .net assemblies

• AsyncErrorHandler - integrate error handling into

async code

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Recommended Fody Add-ins

PropertyChanged - Injects INotifyPropertyChanged

code into properties.

CryptStr - Encrypt literal strings in your .NET

assemblies.

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Make handling transient exception child's play

Save pull your hair when debugging asynchronous errors

Simplify persisting data cross platformSummary

Text “SUPERCHARGE-XAMARIN” to 0437 333 075

Want these slides?

Standard cost of SMS within Australia will apply

The Weather app challenge

Step 1 : Go to http://xamarinhackdayweather.azurewebsites.net

/swagger

Step 2 : Create a Xamarin weather app

Need inspiration?

Step 3 : Present!