Binding Service - Activity

ObverserPtnActivity.java

Messenger mService = null;  
boolean bindService = false;

class IncomingHandler extends Handler {
    @Override  
    public void handleMessage(Message msg) {

    }  
}  

final Messenger mMessenger = new Messenger(new IncomingHandler());

private ServiceConnection mConnection = new ServiceConnection() {
    public void onServiceConnected(ComponentName className, IBinder service) {

        mService = new Messenger(service);  

        try {  
            Message msg = Message.obtain(null, MessengerService.MSG_REGISTER_CLIENT);
            msg.replyTo = mMessenger;  
            mService.send(msg);  

        } catch (RemoteException e) {  
          
        }  
    }  

    public void onServiceDisconnected(ComponentName className) {

        mService = null;  
    }  
};  

void doBindService() {  
    // Establish a connection with the service. We use an explicit
    // class name because there is no reason to be able to let other
    // applications replace our component.  
    bindService = getApplicationContext().bindService(new Intent(mActivity.this, MessengerService.class), mConnection, Context.BIND_AUTO_CREATE);  

}  

void doUnbindService() {  
    if (bindService) {  
        // If we have received the service, and hence registered with it, then now is the time to unregister. 
        if (mService != null) {
            try {  
                Message msg = Message.obtain(null, MessengerService.MSG_UNREGISTER_CLIENT);
                msg.replyTo = mMessenger;  
                mService.send(msg);  
            } catch (RemoteException e) {  
                // There is nothing special we need to do if the service has crashed. 
            }  
        }  

        // Detach our existing connection.  
        getApplicationContext().unbindService(mConnection);  
        bindService = false;  
    }  
}