Targeting and building from API Level 4 and above.
Right now, I'm dealing with an issue in which I'm trying to maintain
bindings to my local service across multiple activities, and stop the
service when the last connection is unbound.
In a nutshell, my service just calls a system service in a HandlerThread
that returns quickly to a BroadcastReceiver, then does that same call again
after waiting a pre-determined amount of time (at least 15 seconds).
Suppose I have my base activity create the first bond to my service in
onCreate() in this fashion:
Intent service = new Intent(ActivityA.this, MyLocalService.class);
getApplicationContext().bindService(service, mConnection,
BIND_AUTO_CREATE);
Suppose also that due to the fact that I maintain my binding across screen
rotations by carrying over the binder and connection, I do not unbind from
the service until the activity is finished:
//onRetainNonConfigurationInstance carries over my binder and connection
since i bound from the app context, so they are fair game.
public void onDestroy(){
super.onDestroy();
//using binder, remove callback to service from current activity
if(isFinishing(){
getApplicationContext().unbindService(mConnection);
}
}
I pretty much do this setup for any other Activity that wants to listen in
on the service.
My problem is that eventually, some activities don't unbind instantly, hence
the service will still hang around as per the behavior of the bind/unbind
pattern if the service is auto created. I had to go as far as stopping my
thread before unbinding on the last activity, which prevented any system
services being called in the BG. Is there a better way to manage binding and
unbinding services, or am I doing my best with my current setup? Also, since
my service (via the binder) is weakly referenced, would this reduce my risk
of leaking memory?
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