Android 圆形按钮 判断点击的位置 显示不同的区域

公司开发项目  一个圆形的按钮 点击不同区域不同的作用，以为控件是长方形的   简单的拼接会有问题  所以通过坐标来判断点击的位置   阴影处即为点击区域 将圆均分为四块

public class CircleMenuImageView extends ImageView {

    private CircleCallback circleCallback;

    public CircleMenuImageView(Context context) {
        super(context);
    }

    public CircleMenuImageView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }

    public CircleMenuImageView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                float x = event.getX();
                float y = event.getY();
                int area = 0;
                if (x < getWidth() / 2 && y < getHeight() / 2) {
                    if (x > y) {
                        area = 1;
                    } else {
                        area = 4;
                    }
                }
                else if (x > getWidth() / 2 && y < getHeight() / 2) {
                    if (getWidth()-x > y) {
                        area = 1;
                    } else {
                        area = 2;
                    }

                } else if (x < getWidth() / 2 && y > getHeight() / 2) {
                    if (getWidth()- y > x) {
                        area = 4;
                    } else {
                        area = 3;
                    }
                } else if (x > getWidth() / 2 && y > getHeight() / 2) {
                    if (x > y) {
                        area = 2;
                    } else {
                        area = 3;
                    }
                }
                Log.d("TTT", x + "-" + y);
                circleCallback.onAreaClick(area);
                break;
            case MotionEvent.ACTION_UP:
                circleCallback.onAreaFinish();
                break;
            default:
                return false;
        }
        return true;
    }

    public void setCircleCallback(CircleCallback circleCallback) {
        this.circleCallback = circleCallback;
    }
    
}

完整代码连接：https://download.csdn.net/download/weixin_36002948/10563535