안드로이드의 Lock

화면 유지 : PowerManager.WakeLock

WIFI 유지 : WifiLock

WifiManager wManager = (WifiManager)mCtx.getSystemService(Context.WIFI_SERVICE);

WifiLock wLock = wManager.createWifiLock("HandsWIFILock");

wLock.acquire();

//doing something

wLock.release();