ComposeView with view binding

user_631959 0
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I added a ComposeView in my XML layout file. I use view binding to inflate this file in my Activity. When I try to call binding.myComposeView.setContent { ... } then I get the following compilation error: Unresolved reference: setContent. When I take a look at the generated binding file, the type of myComposeView is View and not ComposeView. When I use findViewById<ComposeView>(R.id.myComposeView).setContent { ... } then everything works fine. Why is the binding not generated correctly? What can I do to use view binding with a ComposeView?

android-viewbinding android-jetpack-compose
2 Answers

It turns out that I had two versions of the same layout: portrait and horizontal. I converted the portrait one to Compose by replacing a LinearLayout with a ComposeView. However, in the horizontal layout myComposeView was still a LinearLayout. That's why the view binding class that got created had a field myComposeView of type View instead of ComposeView. The view with the same id had different types in two layout versions.

user_6319590

Maybe there is a problem with the way the binding is set up in onCreate of your activity. Are you using something along the lines of the following code? :

override fun onCreate(savedInstanceState: Bundle?) {
  super.onCreate(savedInstanceState)
  binding = ActivityMainBinding.inflate(layoutInflater)
  val view = binding.root
  setContentView(view)

  binding.composeView.setContent {
    MaterialTheme {
      Text(text = "Hello World")
    }
  }
}
user_132582700
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