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If you need to check to see if the Android device is connected to the internet, an alternative (and simple but limited) way to using the ConnectivityManager class can be calling the isReachable method. Here is a sample function:
Written by Mustafa Basgun
October 11, 2010 at 11:23 AM
Posted in Android, Mobile Development, Mobile Experiences
Tagged with android development, connectivitymanager, isreachable
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The problem with that is those nasty WiFi networks that redirect all your web access to a login web page. This code will resolve http://www.google.com to the IP of their login server (like 220.127.116.11) and will falsely claim that you are connected. It is much safer to double-check by downloading the http://www.google.com page and checking if it contains some static string (that does not change with locale or their daily upgrades).
January 20, 2011 at 12:09 PM
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