Hello,
In my Android application, I have a ListActivity. This ListActivity
uses a SimpleAdapter that I fill with items from my service. So, in my
code, I do:
MySuperCoolService.Binder serviceBinder = null;
private ServiceConnection serviceConnection = new ServiceConnection()
{
public void onServiceConnected(ComponentName className,
IBinder service) {
Log.d(TAG, "Service connection: connected!");
serviceBinder = (MySuperCoolService.Binder)service;
}
public void onServiceDisconnected(ComponentName className) {
Log.d(TAG, "Service connection: disconnected");
serviceBinder = null;
}
};
bindService(new Intent(this, MySuperCoolService.class),
serviceConnection, BIND_AUTO_CREATE);
while(serviceBinder==null) {
Thread.Sleep(1000);
}
// now retrieve from service using binder and set list adapter
This whole operation takes hardly any time (less than a second), so I
want it to run in the UI thread. See my onCreate:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
fillDataUsingCodeAbove();
}
The reason I want this to run in the UI thread is that if you have a
list item selected, or you have scrolled to a certain position in the
ListView, and you rotate the device or take out the keyboard or
something (to trigger a configuration change) when my activity is
restarted, Android will try to restore the state right after onCreate.
But, if I run it in a separate thread, it will not. Also there is a
cool fadein animation too :)
The problem I am having with running it in the UI thread is that when
I try to bind to the service, that service bind request gets put onto
the message queue. But then when I go into my loop, I stop the message
queue from looping. So my program hangs, because it's waiting for the
service to get bound, and the service won't get bound until the loop
ends (I think you call this a deadlock). I have thought of putting
Looper.loop() inside my loop, but that just hangs it at Looper.loop()
(I don't know why.)
Sorry for such a long question,
Isaac Waller
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