如何在customView的中心添加imageView？

public class CustomView extends View {
    private ImageView imageView;

    public CustomView(Context context) {
        super(context);
        init();
    }

    public CustomView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    private void init() {
        imageView = new ImageView(getContext());
        imageView.setImageResource(R.drawable.image); // 设置ImageView的图片资源
        addView(imageView);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        int width = MeasureSpec.getSize(widthMeasureSpec);
        int height = MeasureSpec.getSize(heightMeasureSpec);
        imageView.measure(MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY),
                MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY));
    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        int centerX = (right - left) / 2;
        int centerY = (bottom - top) / 2;
        int imageWidth = imageView.getMeasuredWidth();
        int imageHeight = imageView.getMeasuredHeight();
        int imageLeft = centerX - imageWidth / 2;
        int imageTop = centerY - imageHeight / 2;
        imageView.layout(imageLeft, imageTop, imageLeft + imageWidth, imageTop + imageHeight);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        imageView.draw(canvas);
    }
}