Here is my onCreate(), that works:
===========================
// Called at the start of the full lifetime.
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.light_control);
// Initialize activity.
// Obtain the Unit ID from the intent
Bundle extras = getIntent().getExtras();
unitId = extras.getInt("com.scs.haus.UNIT_ID", 0);
// Bind to the Connection Service
Intent bindIntent = new Intent(LightController.this,
ConnectionService.class);
bindService(bindIntent, mConnection,
Context.BIND_AUTO_CREATE);
viewUnitProperties = new Runnable(){
@Override
public void run() {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
Log.e("SLEEP","I CANT SLEEP");
}
getUnitProperties();
}
};
Thread thread = new Thread(null, viewUnitProperties,
"ViewUnitPropertiesThread");
thread.start();
}
===========================
standard binder stuff
===========================
// Handles the connection between the service and activity
private ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder
service) {
// Called when the connection is made
serviceBinder =
((ConnectionService.MyBinder)service).getService();
Log.i("LightController","Service Connected");
}
public void onServiceDisconnected(ComponentName className) {
// Received when the service unexpectedly disconnects
serviceBinder = null;
Log.i("LightController","Service Disconnected");
}
};
===========================
If I try to run the getUnitProperties() method outside of the Thread, I get
a NullExceptionPointer AND the Log.i for onServiceConnected() shows up in
the log after the exception.
Thanks,
J
On Mon, Apr 5, 2010 at 8:08 PM, Bob Kerns <[email protected]> wrote:
> It looks like you are trying to access the connection before the
> onBind() method is called?
>
> You should NOT be sleeping the thread. You should be returning, and
> then picking up your work once onBind() is called.
>
> You're actually blocking the service from running until you do return,
> since it needs to run in that same thread.
>
> On Apr 5, 2:53 pm, Jason LeBlanc <[email protected]> wrote:
> > Thanks for the response. I haven't meant to spam the group, I wasn't sure
> if
> > my post were posting.
> >
> > Problem Activity: LightController
> > Service: ConnectionService
> > Object within Service: Connection
> >
> > Basically all I am attempting to do is start the Service (from a Splash
> > Screen Activity) which will provide a Connection to a hardware
> controller. I
> > hope to use this Connection to send and receive messages with the
> hardware
> > controller.
> >
> > I have been able to bind to the Service and send/receive commands with
> the
> > controller in the Activity that loads after the Splash Screen. The
> problem
> > arose when I tried to create another Activity (LightController) and
> connect
> > to the same Service. Since, I'm just learning I assumed I was doing
> > something wrong with the Service (e.g. binding, unbinding, object
> sharing,
> > etc.)
> >
> > I finally realized in my LogCat that it was reporting that the Service
> was
> > connected after the bit of code I had written to test my connection. I'm
> > still not sure why this happens. Perhaps something to do with the way
> these
> > commands are queued?
> >
> > _ begin code snippet from onCreate()_
> >
> > // Bind to the Connection Service
> > Intent bindIntent = new Intent(LightController.this,
> > ConnectionService.class);
> > bindService(bindIntent, mConnection, Context.BIND_AUTO_CREATE);
> >
> > // Request data from the controller
> > if (unit = serviceBinder.c.connected() ) {
> > Log.i(Connection Service is connected);} else {
> >
> > Log.i(Connection Service is not connected);
> >
> > }
> >
> > _ end code snippet from onCreate()_
> >
> > Anyhow, the above if/then would result in a NullPointerException. I
> > eventually moved it to a try/catch which resulted in a WARN instead of an
> > ERROR (see LogCat posted above).
> >
> > So finally, I have moved the if/then statement to a Thread and all is
> well.
> > I sleep for 1000 ms in the Thread prior to attempting to access the
> > Connection. I am assuming this small time delay is what was needed in
> order
> > to establish the binding to the service. Is it that, or are all of the
> > commands queued until the end of the onCreate() and then executed in some
> > order determined by Android? (can this be clarified?).
> >
> > Additionally, I should probably check to see if the binding has been
> > completed instead of sleeping the thread for an arbitrary time period.
> Then
> > if the service is not bound, sleep for shorter time periods, and then
> check
> > again. This may improve the responsiveness of the app. I'm assuming a
> > _while_ or _for_ loop would be a good method to perform this check.
> >
> > Thanks,
> > J
> >
> > On Apr 5, 2010 1:42 PM, "jotobjects" <[email protected]> wrote:
> >
> > Certainly not obvious what you are doing or why it doesn't work. Can
> > you boil this down to a short example that causes the problem so we
> > can see the code rather than just a long logcat?
> >
> > On Apr 5, 8:30 am, Jason LeBlanc <[email protected]> wrote:
> >
> > > Is there an obvious reason why ...
> > > On Apr 4, 2010 9:01 AM, "Tunneling" <[email protected]> wrote:
> >
> > > I have a Connection objec...
> > > [email protected]<android-developers%[email protected]><android-developers%2Bunsubs
> [email protected]>
> >
> > <android-developers%[email protected]<android-developers%[email protected]><android-developers%252Bu
> [email protected]>
> >
> > > For more options, visit this group athttp://
> >
> > groups.google.com/group/android-developers?hl=en
> >
> >
> >
> > > To unsubscribe, reply using "remove me" as the subject.
> >
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