gistfile1.java

class A extends Activity implement Observer {
	
	onCreate() {


		B b = new B(new Handler() {

			handleMessage(Msg msg) {

				// update model

			}

		});

		new Thread(b).start();


	}

}


class B implements Runnable {

	Handler h;

	public B (Handler h) {

		this.h = h;

	}

	public run() {

		// Do stuff

		h.sendMessage(message); 


	}

}