android - Anko CardView 半径不起作用

Question

我想用 anko 创建 cardView 并为其设置 cornerRadius 参数。但是当我尝试做时 - 没有这样的不同。在主课我这样做:

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

如您所见 - 角始终为矩形。我想要的——和红 bean 一起转弯

小P.S. - 当我从 getView 返回时，使用相同的 cardview 膨胀 xml 布局 - 它有圆角。

Answer 1

所以，问题出在

backgroundColor = Color.WHITE

默认背景 DRAWABLE 参数设置为 ColorDrawable 而不是内部 RoundRectDrawable。所以，当我将此行更改为:

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

全部开始工作，边角变圆