我有ToDoList应用程序，当我按下回收项目的底部sheetfragment（ModifyFragment）显示我选择的任务做修改工作。但更新过程没有完成，因为我离开主页片段和重新创建。但如果我离开应用程序，并再次回来（当oncreate再次工作），我可以看到我的变化。我分享我的代码：

My TaskViewModel ( which is sharedviewmodel for both my home fragment and my bottom sheet fragment : 
@HiltViewModel
class TaskViewModel @Inject constructor(private var tRepo: TaskRepository) : ViewModel() {
    val notesList = MutableLiveData<List<Task>>()
    init {
        loadAllTask()
    }
     fun loadAllTask() {
        CoroutineScope(Dispatchers.Main).launch {
            notesList.postValue(tRepo.getAllTask())
        }
    }
    fun delete(task: Task) = CoroutineScope(Dispatchers.Main).launch {
        tRepo.delete(task)
        loadAllTask()
    }
    fun update(task: Task) = CoroutineScope(Dispatchers.Main).launch{
        tRepo.update(task)
    }
     fun search(searchText : String)   = CoroutineScope(Dispatchers.Main).launch {
         notesList.value = tRepo.search(searchText)
     }
}

字符串
我的底表片段：

class ModifyFragment(val task: Task) : BottomSheetDialogFragment() {
    private lateinit var binding: FragmentModifyBinding
    private val viewModel: TaskViewModel by activityViewModels()
    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        binding = FragmentModifyBinding.inflate(inflater, container, false)
        val date = task.date
        val priority = task.priority
        val taskCurrent = task.task
        binding.date.text = date
        binding.task.setText(taskCurrent)
        binding.add.setOnClickListener {
            val task = Task(task.id,priority,binding.task.text.toString(),task.date,task.isDone)
            viewModel.update(task)
            dismiss()
        }
        return binding.root
    }
}

型
家园碎片：

@AndroidEntryPoint
class HomeFragment : Fragment() {
    private lateinit var binding: FragmentHomeBinding
    private lateinit var viewmodel: TaskViewModel
  
 
    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        binding = FragmentHomeBinding.inflate(inflater, container, false)
        val snapHelper = LinearSnapHelper()
        snapHelper.attachToRecyclerView(binding.recyclerDays)
        binding.fab.setOnClickListener {
            Navigation.findNavController(it).navigate(R.id.toSave)
        }
        
        binding.search.setOnQueryTextListener(object : OnQueryTextListener {
            override fun onQueryTextSubmit(query: String?): Boolean {
                query?.let { viewmodel.search(it) }
                return true
            }
            override fun onQueryTextChange(newText: String?): Boolean {
                newText?.let { viewmodel.search(it) }
                return true
            }
        })
        val adapter = TaskAdapter(requireContext(), emptyList(), viewmodel, this)
        binding.recyclerTask.adapter = adapter
        viewmodel.notesList.observe(viewLifecycleOwner) {
            Log.e("tag","observer")
            adapter.updateList(it)
        }
        return binding.root
    }

型
另外，我想分享我的适配器，我已经使用了updateList方法（也许问题是），因为在其他方式视图模型没有观察我的变化，当我想创建新的任务.适配器：

class TaskAdapter(private val mContext : Context, private var list : List<Task>, private val viewModel: TaskViewModel, private val fragment : Fragment) : RecyclerView.Adapter<TaskAdapter.TaskDesignHolder>(){
    inner class TaskDesignHolder( val binding : TaskItemBinding) : RecyclerView.ViewHolder(binding.root)
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): TaskDesignHolder {
        val inflater = LayoutInflater.from(parent.context)
        val binding = TaskItemBinding.inflate(inflater,parent,false)
        return TaskDesignHolder(binding)
    }
    override fun getItemCount(): Int {
        return list.size
    }
    override fun onBindViewHolder(holder: TaskDesignHolder, position: Int) {
        val b = holder.binding
        val itemlist = list[position]
        b.task.text = itemlist.task
        b.time.text = itemlist.date
        if (itemlist.isDone){
            b.task.paintFlags = Paint.STRIKE_THRU_TEXT_FLAG
            b.time.paintFlags = Paint.STRIKE_THRU_TEXT_FLAG
            b.checkbox.isChecked = true
        }
        b.root.setOnClickListener{
            if (!itemlist.isDone) {
                val bottomSheetFragment = ModifyFragment(itemlist)
                bottomSheetFragment.show(fragment.childFragmentManager, bottomSheetFragment.tag)
            }
            else{
                Toast.makeText(mContext,"You can't modify finished tasks.",Toast.LENGTH_SHORT).show()
            }
        }
        b.priority.backgroundTintList = when(itemlist.priority){
            "Low" -> ContextCompat.getColorStateList(mContext, R.color.green)
            "Medium" -> ContextCompat.getColorStateList(mContext, R.color.yellow)
            "High" -> ContextCompat.getColorStateList(mContext, R.color.red)
            else -> ContextCompat.getColorStateList(mContext, R.color.green)
        }
        b.delete.setOnClickListener {
            viewModel.delete(itemlist)
        }
        b.checkbox.setOnCheckedChangeListener { _, isChecked ->
            if (isChecked){
                b.task.paintFlags = Paint.STRIKE_THRU_TEXT_FLAG
                b.time.paintFlags = Paint.STRIKE_THRU_TEXT_FLAG
                val task = Task(itemlist.id,itemlist.priority,itemlist.task,itemlist.date,true)
                viewModel.update(task)
            }
            else{
                b.task.paintFlags = 0
                b.time.paintFlags = 0
                val task = Task(itemlist.id,itemlist.priority,itemlist.task,itemlist.date,false)
                viewModel.update(task)
            }
        }
    }
    fun updateList(list : List<Task>){
        this.list = list
        notifyDataSetChanged()
    }
}

型
我试着用OnResume获取我的数据，也在我的更新函数中调用loadAllTask来再次检索。不起作用。