Anko radius不工作

Question

我想用anko创建cardView并将cornerRadius参数设置为它。但是当我尝试这样做的时候--没有这样的不同。在main类中，我这样做：

override fun onCreateView(inflater: LayoutInflater, container: ViewGroup): View {
    with(applicationContext!!) {
        listView = listView {
            layoutParams = ViewGroup.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.WRAP_CONTENT)
            dividerHeight = 20
        }
    }
    listView?.adapter = CustomAdapter(forms)

    return listView!!
}

在CustomAdapter中，我像这样返回cardView：

override fun getView(position: Int, convertView: View?, parent: ViewGroup?): View {
    val currentForm = getItem(position)
    return convertView ?: createCardView(parent!!.context, currentForm)
}

private fun createCardView(context: Context, form: FormField): View =
        with(context) {
            frameLayout {
                cardView {
                    layoutParams = FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.WRAP_CONTENT).apply {
                        leftMargin = dip(10)
                        rightMargin = dip(10)
                        topMargin = dip(5)
                        bottomMargin = dip(5)

                    }
                    backgroundColor = Color.WHITE
                    radius = dip(8).toFloat()

                    verticalLayout {
                        // title
                        textView {
                            text = form.title
                            textColor = ContextCompat.getColor(context, R.color.colorPrimary)
                            textSize = 20f
                        }.lparams(width = matchParent) {
                            leftMargin = dip(15)
                            topMargin = dip(10)
                            bottomMargin = dip(10)
                        }
                        // subtitle
                        textView {
                            if (form.subTitle != null) {
                                text = form.subTitle
                                textColor = ContextCompat.getColor(context, R.color.colorPrimary)
                                textSize = 12f
                                visibility = View.VISIBLE
                            } else {
                                visibility = View.GONE
                            }
                        }.lparams(width = matchParent) {
                            leftMargin = dip(15)
                            topMargin = dip(10)
                            bottomMargin = dip(10)
                        }

                    }.lparams(width = matchParent, height = matchParent)
                }
            }
        }

我尝试以不同的方式和值调用'radius‘setter，但结果总是这样

​

正如你所看到的--角总是长方形的。我想要的是-和Anko在角落里转转

​

小附言-当我用同样的cardview从getView返回时，它有圆角。

Answer 1

所以，问题出在

backgroundColor = Color.WHITE

将默认的背景可绘制参数设置为ColorDrawable，而不是内部RoundRectDrawable。因此，当我将此行更改为：

background.setColorFilter(Color.WHITE, PorterDuff.Mode.SRC_ATOP)

所有人都开始工作，圆角变得圆润起来

Answer 2

之前的答案对我没有帮助。这对我来说很有效：

cardView {    
    background = GradientDrawable().apply {
        shape = GradientDrawable.RECTANGLE
        cornerRadius = 8f
        setStroke(2, grey)
        ....
    }
}