Cool Open Source Libs Nabil HACHICHA GDG DevFest 2013 Algiers 

Why Open Source? ● Better quality ○ Developed by many passionate developers ○ Innovation and enhancements over time ● Open standards & interoperability ● It’s hard to develop without it 

Use case ● Develop & test a small app (Employees list) 

Use case Architecture Request content from network 

Use case Architecture ListView Adapter, based on a simple POJO 

Use case Architecture Fragment holding our ListView 

Use case Architecture Parse HTML using Xpath 

OkHttp ● Efficient Http client, based on java.net. HttpURLConnection or Apache HttpClient ● Can also be used as as the transport layer for Volley 

OkHttp ● SPDY support, allows all requests to the same host to share a socket. ● Transparent GZIP ● Silently recover from common connection problems ● Recovers from problematic proxy servers and failed SSL handshakes ● Connection pooling reduces request latency (if SPDY isn’t available) 

OkHttp ● SPDY support, allows all requests to the same host to share a socket. ● Transparent GZIP ● Silently recover from common connection problems ● Recovers from problematic proxy servers and failed SSL handshakes ● Connection pooling reduces request latency (if SPDY isn’t available) 

OkHttp ● SPDY support, allows all requests to the same host to share a socket. ● Transparent GZIP ● Silently recover from common connection problems ● Recovers from problematic proxy servers and failed SSL handshakes ● Connection pooling reduces request latency (if SPDY isn’t available) 

OkHttp ● SPDY support, allows all requests to the same host to share a socket. ● Transparent GZIP ● Silently recover from common connection problems ● Recovers from problematic proxy servers and failed SSL handshakes ● Connection pooling reduces request latency (if SPDY isn’t available) 

OkHttp ● SPDY support, allows all requests to the same host to share a socket. ● Transparent GZIP ● Silently recover from common connection problems ● Recovers from problematic proxy servers and failed SSL handshakes ● Connection pooling reduces request latency (if SPDY isn’t available) 

Picasso ● A powerful image downloading and caching library for Android 

Picasso ● Handling ImageView recycling and download cancelation in an adapter ● Complex image transformations with minimal memory use. ● Automatic memory and disk caching. 

Code 

Testsing Robolectric Mockito FEST 

Robolectric ● Run Android tests inside JVM ● Instruct Robolectric to configure Android differently ○ use a non-standard manifest file ○ use French resources on a sideways high-res display (qualifiers) 

Mockito ● Mocking framework, with fluent API syntaxe 

FEST ● Fixtures for Easy Software Testing ● Simplify software testing by providing a fluent Assertions ● Just use assertThat ● FEST Android, extension of FEST 

FEST Example: ● Regular JUNIT assertEquals(View.GONE,view.getVisibility()) ● Regular FEST assertThat(view.getVisibility()).isEqualTo (View.GONE) ● FEST Android assertThat(view).isGone() 

Code 

TDD ● objc-TimesSquare ○ calendar view for your apps ● PonyDebugger ○ Remote network and data debugging for your native iOS app using Chrome Developer Tools ● SocketRocket ○ WebSocket client library ● objc-mocktail ○ stub out HTTP servers in your Objective-C app. ● KIF ○ Keep It Functional - An iOS Functional Testing Framework 

Thanks! Q&A Links http://square.github.io/