@EActivity(R.layout.login)
public class LoginActivity extends Activity {
    @ViewById
    protected EditText username;

    @ViewById
    protected EditText password;

    @ViewById
    protected Button loginButton;

    @Click({ R.id.loginButton })
    public void sendLogin() {
        Credentials credentials = new Credentials(
            username.getText().toString(), 
            password.getText().toString()
        );
        new LoginTask().run(credentials);
    }

    @Override
    public void onResume() {
        super.onResume();
        BusProvider.getInstance().register(this);
    }

    @Override
    public void onPause() {
        super.onPause();
        BusProvider.getInstance().unregister(this);
    }

    // @Trace - won't work here (doesn't preserve @Subscribe?)
    @Subscribe
    public void onLoginFailure(LoginFailureEvent event) {
        Log.w(LoginActivity.class.getName(),"Login Failure");
    }

    // @Trace - won't work here (doesn't preserve @Subscribe?)
    @Subscribe
    public void onLoginSuccess(LoginSuccessEvent event) {
        Log.w(LoginActivity.class.getName(),"Login Success");
    }

}

@EBean
public class LoginTask {    
    @Background
    public void run(Credentials credentials) {
        // perform login here
        post(true);
    }

    @UiThread
    public void post(boolean success) {
        if (success)
            BusProvider.getInstance().post(new LoginSuccessEvent());        
        else
            BusProvider.getInstance().post(new LoginFailureEvent());        
    }
}