Kotlin:
- Add a button's action in Fragment (config in XML does not work)
- start a new activity from a Fragment

	class MainFragment : Fragment() {
	//...
	override fun onCreateView(
	inflater: LayoutInflater, container: ViewGroup?,
	savedInstanceState: Bundle?
	): View {
	val view: View = inflater.inflate(R.layout.main_fragment, container, false)
	// add button click action by code
	// setup action in XML does not work
	val btn : Button = view.findViewById(R.id.button1)
	btn.setOnClickListener { view: View ->
	// start up a new activity
	val intent = Intent(requireContext(), Gu1Activity::class.java)
	requireContext().startActivity(intent)
	}
	return view
	}
	// ...
	}

view raw MainFragment.kt hosted with ❤ by GitHub