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Answer 1

+3 A:

You need to create a wifi lock. Here is how you do it:

WifiManager wifimanager = (WifiManager)context.getSystemService(Context.WIFI_SERVICE);
WifiLock lock = wifimanager.createWifiLock("my_lock");

lock.acquire();

// your code here

lock.release();

Note you should only create a wifi lock when you're actively using wifi (i.e. downloading a large file), otherwise you will needlessly impact battery life.

irlennard 2010-06-10 14:13:11

hhmm should I be checking if a wifi connection is available/set-up beforehand or can I just place a lock and if there is no wifi-connection the API will take care of that ?

TiGer 2010-06-11 08:36:36

Good question. The docs don't mention it, but I imagine the lock has no effect when there is no wifi connection.

irlennard 2010-06-14 07:56:53

Answer 2

A:

I get a SecurityException when I call WifiLock.acquire(). Am I missing a uses-permission in my manifest or is there something I need to check beforehand in code? I'm assuming it has to do with the advanced settings in the wifi settings page set to NEVER.

Josh P 2010-10-18 05:32:03

ur gonna need :<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/><uses-permission android:name="android.permission.WAKE_LOCK"/>

TiGer 2010-10-18 07:45:17

Thanks I'll give that a try tonight and let everyone know how it goes. That sounds like what I was looking for anyway.

Josh P 2010-10-25 18:55:05

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Wifi just goes into IDLE

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