Android studio shows errors in the lines

REPOSITORY.insert(note){ onSuccess() }

in the "AddNewNoteFragmentViewModel" and in the lines

viewModel.insert(AppNote(name = name, text = text)){ view?.findNavController()?.navigate(R.id.action_addNewNoteFragment_to_mainFragment)}

in the file "AddNewNoteFragment"

I realized that the error is related to streams, but I do not know how to solve it

If anyone knows, please help, I could not find anything worthwhile on the Internet

AddNewNoteFragment

  package com.example.notes.fragments.add_new_note

import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.lifecycle.ViewModelProvider
import androidx.navigation.findNavController
import com.example.notes.R
import com.example.notes.databinding.FragmentAddNewNoteBinding
import com.example.notes.model.AppNote
import com.example.notes.utilits.showToast


class AddNewNoteFragment : Fragment() {

    private var _binding: FragmentAddNewNoteBinding? = null
    val binding get() = _binding!!
    private lateinit var viewModel: AddNewNoteFragmentViewModel

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        _binding = FragmentAddNewNoteBinding.inflate(inflater, container, false)
        val view = binding.root
        return view

    }


    override fun onStart() {
        super.onStart()
        initialization()
    }

    private fun initialization() {
        viewModel = ViewModelProvider(this).get(AddNewNoteFragmentViewModel::class.java)

        binding.buttonAddNote.setOnClickListener {

            val name = binding.inputNameNote.text.toString()
            val text = binding.inputTextNote.text.toString()

            if (name.isEmpty()){

                showToast("Введите имя заметки")

            } else{

                viewModel.insert(AppNote(name = name, text = text)){
                    view?.findNavController()?.navigate(R.id.action_addNewNoteFragment_to_mainFragment)
                }

            }

        }
    }

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

AddNewNoteFragmentViewModel

package com.example.notes.fragments.add_new_note

import android.app.Application
import androidx.lifecycle.AndroidViewModel
import androidx.lifecycle.viewModelScope
import com.example.notes.model.AppNote
import com.example.notes.utilits.REPOSITORY
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch

class AddNewNoteFragmentViewModel(application: Application): AndroidViewModel(application) {

    fun insert(note: AppNote,onSuccess:()-> Unit) =
        viewModelScope.launch (Dispatchers.IO){
            REPOSITORY.insert(note){
                onSuccess()
            }
        }

}

Error screen

enter image description here

CodePudding user response：

They asked me to show the code of my repository AppRoomRepository

package com.example.notes.room

import androidx.lifecycle.LiveData
import com.example.notes.database.DataBaseRepository
import com.example.notes.model.AppNote

class AppRoomRepository(private val appRoomDao: AppRoomDao):DataBaseRepository {
    override val allNotes: LiveData<List<AppNote>>
        get() = appRoomDao.getAllNotes()

    override suspend fun insert(note: AppNote, onSuccess: () -> Unit) {
       appRoomDao.insert(note)
        onSuccess()
    }

    override suspend fun dalete(note: AppNote, onSuccess: () -> Unit) {
        appRoomDao.delete(note)
        onSuccess()
    }
}

CodePudding user response：

Problem solved In AddNewNoteFragmentViewModel requires Dispatchers.IO to be changed to Dispatchers.Main