Hi folks,
I have a service with a coarse-grained LocationListener which needs to
do network access in onLocationChanged(). This is done in a separate
thread (to avoid blocking the UI thread) with a wakelock (to ensure
that the device doesn't sleep when onLocationChanged() is finished).
This generally works fine. But in a small fraction of cases, when the
device hasn't been used for a while, the network call fails with an
IOException (specifically, an UnknownHostException). The failure
continues even when the call is retried several times, spanning
several minutes or even hours. I am positive that a stable internet
connection is available, both via WIFI and 3G. I imagine that the WIFI
may have switched off to preserve battery, but the 3G connection
should still be available -- right?
Here is an outline of the code from the LocationListener:
@Override
public void onLocationChanged(Location loc) {
PowerManager pm = (PowerManager)
getSystemService(POWER_SERVICE);
Wakelock wakelock =
pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
MyService.class.getName());
wakelock.acquire();
new Thread(new Runnable() {
@Override
public void run() {
someBlockingInternetIO();
mWakeLockPostCheckins.release();
}
}).start();
}
Any idea why this does not work consistently? Any pointers would be
greatly appreciated, as this issue is affecting a published app.
Thanks and best regards,
Michael.
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