widget has an unresolved type,and thus it was upcasted to android.view.View

使用 Kotlin 的 View Binding 来绑定 View, 对于框架提供的控件没有任何问题，但是对自定义控件会出现如下错误：

比如，有自定义控件 com.example.customText

xx.xml

xml

<com.example.customText
	adnroid:id='@+id/custom_text'
	...
/>

如果直接使用

custom_text.text = 'Hello'

会有如下错误

bash

widget has an unresolved type 'com.example.customText',and thus it was upcasted to 'android.view.View'

需要先做类型转换：

kotlin

val customtext as customText
customtext.text = 'Hello'

widget has an unresolved type,and thus it was upcasted to android.view.View ​