How to use View Binding on custom views
If you are trying to use View Binding with the root view, this is working for me:
class CustomView @JvmOverloads constructor(
context: Context,
attrs: AttributeSet? = null,
defStyleAttr: Int = 0
) : ConstraintLayout(context, attrs, defStyleAttr) {
private lateinit var binding: CustomViewBinding
override fun onFinishInflate() {
super.onFinishInflate()
binding = CustomViewBinding.bind(this)
}
}
Just inform the root, and whether you want to attach to it
init { // inflate binding and add as view
binding = ResultProfileBinding.inflate(LayoutInflater.from(context), this)
}
or
init { // inflate binding and add as view
binding = ResultProfileBinding.inflate(LayoutInflater.from(context), this, true)
}
which inflate method to use will depend on the root layout type in xml.
You can initialize the view binding property right away
private val binding = CustomViewBinding.inflate(LayoutInflater.from(context), this)
To use the view binding, you need to use the generated binding class not the LayoutInflater
, for example, if the layout name is result_profile.xml
then you need to use ResultProfileBinding
as:
class CustomView @kotlin.jvm.JvmOverloads constructor(
context: Context,
attrs: AttributeSet? = null,
defStyleAttr: Int = 0
) : FrameLayout(context, attrs, defStyleAttr) {
private lateinit var binding: ResultProfileBinding
init { // inflate binding and add as view
binding = ResultProfileBinding.inflate(LayoutInflater.from(context))
addView(binding.root)
}
}
- Auto generated class :
result_profile.xml
->ResultProfileBinding
(name of layout, appended withBinding
) Inflate the binding
ResultProfileBinding.inflate(LayoutInflater.from(context))
Use
addView
to add the view in the hierarchy as:addView(binding.root)
Note: If you are extending from ConstraintLayout
(is the parent class) then use constraint set