android - Recyclerview notifyDataSetChanged 再次进入同一 Activity 时未调用

Question

在我的要求中有向导步骤。所以如果我在第二步。然后按后退。现在我在第一个向导中。然后按下一步以重新创建 Activity 。这就是我将其放入 OnCreate 的原因。

当我第一次参加该 Activity 时，我的适配器 notifydatasetchange 正常工作，但当我返回并再次参加同一 Activity 时Notifydatasetchange() 不工作意味着没有调用 onbindviewholder。

即使我尝试再次设置适配器，但仍未调用它。这是我的代码。我缺少什么？感谢您的帮助!

    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
        SetContentView(Resource.Layout.ProposalInviteOwnersView);
       _lstviewNearByPeople = FindViewById<RecyclerView>(Resource.Id.lstviewNearByPeople);
        _layoutmanager = new LinearLayoutManager(this, LinearLayoutManager.Horizontal, false);
        _lstviewNearByPeople.HasFixedSize = true;
        _lstviewNearByPeople.SetLayoutManager(_layoutmanager);
        BindtoNearByAdapter();
    }

    public void BindtoNearByAdapter()
    {
        try
        {
            if (GlobalConst.LstNearByPeople.Count > 0)
            {
                _lstNearByPeople = new List<Owners>();
                _lstNearByPeople.AddRange(GlobalConst.LstNearByPeople);

                if(_nearByCollaboratorAdapter==null)
                {
                    _lstviewNearByPeople.Visibility = ViewStates.Visible;

                    _nearByCollaboratorAdapter = new NearByCollaboratorAdapter(this, _lstNearByPeople, this, mlastPosition);
                    _lstviewNearByPeople.SetAdapter(_nearByCollaboratorAdapter);

                }
                else
                {
                    _nearByCollaboratorAdapter.updateItems(_lstNearByPeople);

                }

            }
            else
            {
                _noNearByDevicelayout.Visibility = ViewStates.Visible;
                _lstviewNearByPeople.Visibility = ViewStates.Gone;
            }


        }
        catch (System.Exception ex)
        {
            Core.Helpers.GlobalLogic.createCrashReport(ex);
            Toast.MakeText(this, ex.Message.ToString(), ToastLength.Short).Show();
        }
    }

    public class NearByCollaboratorAdapter : RecyclerView.Adapter
{
    public List<Owners> _lstNearByPeople;
    readonly ISelectCollaborator _listner;
    readonly Activity _context;
    protected int mLastPosition;


    public NearByCollaboratorAdapter(Activity context, List<Owners> lstNearByPeople, ISelectCollaborator listner, int _mLastPosition)
    {
        _lstNearByPeople = lstNearByPeople;
        _context = context;
        _listner = listner;
        mLastPosition = _mLastPosition;

    }
    public override int ItemCount => _lstNearByPeople.Count;

    public void updateItems(List<Owners> lstNearByPeople)
    {
        _lstNearByPeople.Clear();
        _lstNearByPeople.AddRange(lstNearByPeople);
        this.NotifyDataSetChanged();
    }






}

Answer 1

实现一个 onResume 方法...

@Override
public void OnResume (){
  super.onResume();
  BindtoNearByAdapter()
}