android 任意剪切view,Android 任意View切圆角

问题

做直播功能的自定义View，嵌套了很多子View，如何能给整个View 切圆角呢？

方案

摘录部分自定义View的代码如下

class LiveStageItemView(context: Context, attrs: AttributeSet? = null) :

ConstraintLayout(context, attrs) {

private var itemWidth = 147.pt

private var itemHeight = 110.pt

init {

clipCorner(itemWidth, itemHeight)

}

// 切圆角

fun clipCorner(width: Int, height: Int) {

this.outlineProvider = object : ViewOutlineProvider() {

override fun getOutline(view: View?, outline: Outline?) {

outline?.setRoundRect(0, 0, width, height, 4.pt.toFloat())

}

}

this.clipToOutline = true

}

}

亲测可用，重点代码如下：

this.outlineProvider = object : ViewOutlineProvider() {

override fun getOutline(view: View?, outline: Outline?) {

outline?.setRoundRect(0, 0, width, height, 4.pt.toFloat())

}

}

this.clipToOutline = true

谨记备忘！