I want to determine the transfer speed possible when connecting before downloading, for example, an image. How can I do this in Android? Any suggestions?
Not speed, as far as I know
Rather, the type of connection:
https://groups.google.com/forum/#!topic/android-developers/ius4garTtGA
http://developer.android.com/reference/android/net/wifi/WifiInfo.html
Also, see How to get the Wii standard that was just published should help!