Networking on android and customization with Volley

1. Google Volley
Android Networking
tai.dangvan@2359media.com.vn

2. Android networking libraries
Volley https://android.googlesource.com/platform/frameworks/volley
Retrofit https://github.com/loopj/android-async-http
Android Async Http https://github.com/loopj/android-async-http
Ion https://github.com/koush/ion
….

3. Volley - Overview

4. Volley - Quick Start

5. Key classes
RequestQueue
- Volley.newRequestQueue(Context ctx)
- CancelAll(String tag)
JsonObjectRequest
JsonArrayRequest
StringRequest

6. Default
Http stack:
- AndroidHttpClient (sdk version < 9)
- HurlStack (base on java.net.HttpURLConnection)
Retry count: 1
Cache size: 5MB
Time-to-live: server
...

7. Volley - Customize

8. RequestQueue
- OkHttp
- User agent
Request<T>
- Gson support
● extend Request<T>
- Header params
- Post body
- Retry policy
● SocketTimeoutException
● ConnectTimeoutException
● IOException
Cache
- Time to live
- Cache size
Cancellation
- Filter by Tag

9. References
Volley tutorial
http://developer.android.com/training/volley/index.html
https://www.youtube.com/watch?v=yhv8l9F44qo
Volley vs Retrofit
http://instructure.github.io/blog/2013/12/09/volley-vs-retrofit/
Use OkHttp with Volley
https://gist.github.com/JakeWharton/5616899
https://github.com/square/okhttp/issues/942