Android : Can I use a service to handle multi-touch events?

I wanna write a multi-touch in a service 。How can I chance single touch to multi touch in this service？I found in this case e.getPointerCount() always == 1。any idea？thanks at first!

    public void onCreate(){
    super.onCreate();
    startForeground(1, new Notification());
    mViewService = ViewService.getInstance(this);
    mViewService.addView(ViewService.TOUCH_VIEW);
    mViewService.getView(ViewService.TOUCH_VIEW).setOnTouchListener(new TouchListener());
}

class TouchListener implements View.OnTouchListener{

    @Override
    public boolean onTouch(View v, MotionEvent e){
       int pointerCount=e.getPointerCount();
       //question: why pointerCount always == 1？I wanna >=3.
       //how can I chance to multi-touch.
    }

}