自定义视图菜单操作侦听器

Question

我正在制作一个响应触摸事件的简单绘图应用。实际的＆＃34;绘画＆＃34;发生在自定义视图中，内部具有所有内部逻辑。完成此操作后，我想在操作栏中添加Clear按钮，但是在确定如何将自定义视图链接到菜单时遇到了一些困难。

public class MyView extends View {

private Paint paint;
ArrayList<TouchPosition> touchedPositions = new ArrayList();

public MyView(Context context, AttributeSet attrs) {
    super(context, attrs);
    paint = new Paint();
    paint.setColor(Color.MAGENTA);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
    touchedPositions.add(new TouchPosition(event.getX(), event.getY()));    
    invalidate();
    return true;
}

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    for(Iterator<TouchPosition> touchedList = touchedPositions.iterator(); touchedList.hasNext(); ) {
        TouchPosition eachTouch = touchedList.next();
        System.out.println(eachTouch.xPosition);
        canvas.drawCircle(eachTouch.xPosition, eachTouch.yPosition, 10, paint);     
    }
}
}