2024/4/8

跟着教程写todoapplication

fragment_add:

package com.example.to_do_application.fragments.add

import android.os.Bundle
import android.view.*
import android.widget.Toast
import androidx.fragment.app.Fragment
import androidx.fragment.app.viewModels
import androidx.navigation.fragment.findNavController
import com.example.to_do_application.R
import com.example.to_do_application.data.models.ToDoData
import com.example.to_do_application.data.viewmodel.ToDoViewModel
import com.example.to_do_application.databinding.FragmentAddBinding
import com.example.to_do_application.fragments.SharedViewModel

class AddFragment : Fragment() {

     private val mToDoViewModel: ToDoViewModel by viewModels()
     private val mSharedViewModel: SharedViewModel by viewModels()

     private var _binding: FragmentAddBinding? = null
     private val binding get() = _binding!!

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate the layout for this fragment
        _binding = FragmentAddBinding.inflate(layoutInflater, container, false)
        //Spinner Item Selected Listener
        binding.spinner.onItemSelectedListener = mSharedViewModel.listener

        val view = binding.root
        //Set Menu
        setHasOptionsMenu(true)

        return view
    }

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

     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         if(item.itemId == R.id.menu_add){
             insertDataToDB()
         }
         return super.onContextItemSelected(item)
     }

     private fun insertDataToDB() {
         val mTitle = binding.textView.text.toString()
         val mPriority = binding.spinner.selectedItem.toString()
         val mDescription = binding.editTextTextMultiLine.text.toString()

         System.out.println(mPriority + "add")

         val validation = mSharedViewModel.verifyDataFromUser(mTitle,mDescription)
         if(validation){
             //Insert Data to Database
             val newData = ToDoData(
                 0,
                 mTitle,
                 mSharedViewModel.parsePriority(mPriority),
                 mDescription
             )
             mToDoViewModel.insertData(newData)
             Toast.makeText(requireContext(),"Successfully added!",Toast.LENGTH_SHORT).show()
             //Navigation Back
             findNavController().navigate(R.id.action_addFragment_to_listFragment)
         }else{
             Toast.makeText(requireContext(),"Please fill out all fields.",Toast.LENGTH_SHORT).show()
         }
     }


 }