getScanResults（）
水平
 

http://developer.android.com/reference/android/net/wifi/WifiManager.html http://developer.android.com/reference/android/net/wifi/ScanResult.html

Possible Duplicate:
Android: How to monitor WiFi signal strength

Is there a way to know the signal strength of a wifi network using code?

getScanResults()
level

http://developer.android.com/reference/android/net/wifi/WifiManager.html http://developer.android.com/reference/android/net/wifi/ScanResult.html