问题
import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.databinding.DataBindingUtil
import androidx.drawerlayout.widget.DrawerLayout
import com.example.tender.R
import com.example.tender.databinding.FragmentAvailableTenderBinding
import com.example.tender.databinding.FragmentLoginBinding
import androidx.navigation.fragment.findNavController
import androidx.navigation.ui.NavigationUI
/**
* A simple [Fragment] subclass.
*/
class AvailableTenderFragment : Fragment() {
private lateinit var drawerLayout: DrawerLayout
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
val binding = FragmentAvailableTenderBinding.inflate(inflater)
drawerLayout = binding.drawerLayout
**val navController = this.findNavController(R.id.nav_host_fragment)**
**NavigationUI.setupActionBarWithNavController(this, navController, drawerLayout)**
NavigationUI.setupWithNavController(binding.navView, navController)
binding.root
}
}
"To many arguments for public fun Fragment.findNavController():NAvcontroller defined in androidx.navigation.fragment" is showing when i hover on findnavcontroller.I am unable to resolve the error on the above bold lines.In this case what should I do?
回答1:
As per the Navigate to a destination documentation, the androidx.navigation.fragment.findNavController you've imported takes no parameters (it finds the parent NavHostFragment of the current Fragment and doesn't need the ID of the NavHostFragment).
The lines you've written, namely findNavController(R.id.nav_host_fragment) and setupActionBarWithNavController() are methods you'd call in an Activity, not in a Fragment.
来源：https://stackoverflow.com/questions/59728421/to-many-arguments-for-public-fun-fragment-findnavcontroller