Cannot call inline fun SearchView.OnQueryTextListener from onCreateOptionsMenu

Question

In this app I tried to implement SearchView.OnQueryTextListener in separate kotlin file like this

import androidx.appcompat.widget.SearchView

inline fun SearchView.OnQueryTextListener(crossinline listener: (String) -> Unit) {
    this.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
        override fun onQueryTextSubmit(query: String?): Boolean {
            return true
        }

        override fun onQueryTextChange(newText: String?): Boolean {
            listener(newText.orEmpty())
            return true
        }

    })

}

but when I tried to use it in fragment I can't see it in other methods, I see this error Interface OnQueryTextListener does not have constructors

the full code of fragment

AndroidEntryPoint
class TasksFragment : Fragment(R.layout.fragment_tasks) {

    private val tasksViewModel: TasksViewModel by viewModels()
    private var binding: FragmentTasksBinding?=null

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {

        binding = FragmentTasksBinding.inflate(inflater, container, false)

        val tasksAdapter:TasksAdapter = TasksAdapter()

        binding?.apply {
            recyclerViewTasks.apply {
                adapter = tasksAdapter
                layoutManager = LinearLayoutManager(requireContext())
                setHasFixedSize(true)

            }
        }

        tasksViewModel.task.observe(viewLifecycleOwner, {
            tasksAdapter.submitList(it)
        })

        return binding!!.root
    }

    override fun onDestroyView() {
        super.onDestroyView()
        binding = null
    }

    override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
        inflater.inflate(R.menu.menu_fragment_tasks,menu)

        val searchItem = menu.findItem(R.id.action_search)
        val searchView = searchItem.actionView as SearchView

        searchView.OnQueryTextListener{ //

        }


    }


}

Answer 1

Name of your function OnQueryTextListener seems to be conflicting with interface name SearchView.OnQueryTextListener, so just use another name.

It is anyway recommended to start function names in lowercase, so changing the fun to eg. inline fun SearchView.onQueryTextListener(...) should fix it.