onTouchListener class in SurfaceView

I am trying to implement a onTouchListener so i can call it from a different class...

public OnTouchListener nextListener = new OnTouchListener() {
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_DOWN) {
        //stuff

        }

        return true;

    }

};

And it keeps throwing me this error. "Class anonymous class derived from onTouchListener must either be abstract or implement abstract method". I know it is something small because I had it working earlier.