如何将OnActivityResult值分配给Listview? [英] How to assign OnActivityResult values to the Listview?

问题描述

我在各自的listItem中具有一个Listview和Click Events，需要从click事件中获取结果并填充在List中.

I have a Listview and Click Events in the respective listItems and need to get result back from the click events and populate on the List.

我的BaseAdapter类是

My BaseAdapter class is

 public class RemnantListAdapter : BaseAdapter<InventorySlabs>
 {
    private PartialInventory context;
    private List<InventorySlabs> RemnantList;

    public RemnantListAdapter(PartialInventory partialInventory, List<InventorySlabs> remnantList)
    {
        this.context = partialInventory;
        this.RemnantList = remnantList;
    }

    public override InventorySlabs this[int position]
    {
        get
        {
            return RemnantList[position];
        }
    }

    public override int Count
    {
        get
        {
            return RemnantList.Count;
        }
    }

    public override long GetItemId(int position)
    {
        return position;
    }

    public override int ViewTypeCount
    {
        get
        {
            return Count;
        }
    }

    public override int GetItemViewType(int position)
    {
        return position;
    }

    private class remnantHolder : Object
    {
        public Button EditRemnant1;

        public TextView Remnant1 = null;
        public TextView Rem_StockNMaterial1 = null;
        public TextView Rem_Dimensions1 = null;
        public TextView Rem_Status1 = null;
    }

    public override View GetView(int position, View convertView, ViewGroup parent)
    {
        remnantHolder holder = null;

        if (convertView == null)
        {
            convertView = (convertView ?? context.LayoutInflater.Inflate(Resource.Layout.remnant_list, parent, false));

            holder = new remnantHolder();                
            holder.EditRemnant1 = convertView.FindViewById<Button>(Resource.Id.editRemnant1);              

            holder.Remnant1 = convertView.FindViewById<TextView>(Resource.Id.remnant1);
            holder.Rem_StockNMaterial1 = convertView.FindViewById<TextView>(Resource.Id.remnant_mtrl1);
            holder.Rem_Dimensions1 = convertView.FindViewById<TextView>(Resource.Id.remnant_dimens1);
            holder.Rem_Status1 = convertView.FindViewById<TextView>(Resource.Id.remnant_status1);

            try
            {
                InventorySlabs remnantModel = this.RemnantList[position];
                if (remnantModel != null)
                {
                    holder.Remnant1.Text = "#" + remnantModel.ExtSlabNo;
                    holder.Rem_StockNMaterial1.Text = remnantModel.SellName + "-" + remnantModel.Depth + "-" + remnantModel.Finish;
                    double sqft = (remnantModel.Width * remnantModel.Height) / 144;
                    holder.Rem_Dimensions1.Text = "(" + remnantModel.Width.ToString() + " * " + remnantModel.Height.ToString() + ")" + sqft.ToString("N2");
                    holder.Rem_Status1.Text = remnantModel.Status;

                    holder.EditRemnant1.Click += delegate (object sender, System.EventArgs args)
                    {
                        if (remnantModel != null)
                        {
                            Intent intent = new Intent(context, typeof(EditRemnant));
                            intent.PutExtra("OpenPopType", 2);
                            intent.PutExtra("SlabNo", remnantModel.ExtSlabNo);
                            context.StartActivityForResult(intent, 1);
                        }
                    };                      
                }
            }
            catch (Exception ex)
            {
                var method = System.Reflection.MethodBase.GetCurrentMethod();
                var methodName = method.Name;
                var className = method.ReflectedType.Name;

                MainActivity.SaveLogReport(className, methodName, ex);
            }

            convertView.Tag = holder;
        }
        else
        {
            holder = (remnantHolder)convertView.Tag;
        }
        return convertView;
    }

    public void ActivityResult(int requestCode, Result resultCode, Intent data)
    {
        switch (requestCode)
        {              
            case 1:
                if (data != null)
                {
                    try
                    {
                        string remSlab = data.GetStringExtra("extSlabNo");
                        if (remSlab != null)
                        {
                            remnantData.Width = double.Parse(data.GetStringExtra("remWidth"));
                            remnantData.Height = double.Parse(data.GetStringExtra("remHeight"));
                            double sqft = (remnantData.Width * remnantData.Height) / 144;

                            Rem_Dimensions.Text = "(" + remnantData.Width.ToString() + " * " + remnantData.Height.ToString() + ")" + sqft.ToString("N2");
                        }
                    }
                    catch (Exception ex)
                    {
                        var method = System.Reflection.MethodBase.GetCurrentMethod();
                        var methodName = method.Name;
                        var className = method.ReflectedType.Name;

                        MainActivity.SaveLogReport(className, methodName, ex);
                    }
                }
                break;
        }
    }
}

在我的主要活动中

我将结果称为

protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
{
    remnantListAdapter.ActivityResult(requestCode, resultCode, data);            
}

在ListItem的编辑"视图中编辑详细信息并关闭弹出窗口之后，我不知道如何将值传递给持有人以在Listview中进行更新.

After editing the details in Edit view of the ListItem and close the Popup, I am not knowing how to Pass the Values to the Holder to Update in Listview.

推荐答案

您可以将positon传递给click事件中的新活动，然后将其传递给结果意图.

You could pass the positon to the new activity in the click event and pass it back with the result intent.

例如:

    holder.EditRemnant1.Click += delegate (object sender, System.EventArgs args)
    {
        if (remnantModel != null)
        {
            Intent intent = new Intent(context, typeof(EditRemnant));
            intent.PutExtra("OpenPopType", 2);
            intent.PutExtra("SlabNo", remnantModel.ExtSlabNo);
            intent.PutExtra("Position", position );
            context.StartActivityForResult(intent, 1);
        }
    };

在新活动中:

    protected override void OnCreate(Bundle savedInstanceState)
    {
        Intent intent = Intent;
        var position =intent.GetIntExtra("Position", -1);
        base.OnCreate(savedInstanceState);
        Intent data = new Intent();
        String text = "extSlabNo";
        data.PutExtra("extSlabNo", text);
        data.PutExtra("remWidth", 10);
        data.PutExtra("remHeight", 20);
        data.PutExtra("Position", position);
        SetResult(Result.Ok, data);
    }

然后，您可以根据正值来修改适配器中的数据:

Then you could modify the data in the adapter according to the positon value:

    public void ActivityResult(int requestCode, Result resultCode, Intent data)
    {
        switch (requestCode)
        {
            case 1:
                if (data != null)
                {
                    try
                    {
                        string remSlab = data.GetStringExtra("extSlabNo");
                        int position = data.GetIntExtra("Position", -1);
                        if (remSlab != null && position >= 0)
                        {
                            RemnantList[position].Width = data.GetIntExtra("remWidth", -1);
                            RemnantList[position].Height = data.GetIntExtra("remHeight", -1);
                            NotifyDataSetChanged();
                        }
                    }
                    catch (Exception ex)
                    {
                        var method = System.Reflection.MethodBase.GetCurrentMethod();
                        var methodName = method.Name;
                        var className = method.ReflectedType.Name;
                        MainActivity.SaveLogReport(className, methodName, ex);
                    }
                }
                break;
        }

并使用MainActivity OnActivityResult()方法重置适配器:

And reset the adapter in MainActivity OnActivityResult() method :

public class MainActivity : AppCompatActivity
{
    RemnantListAdapter remnantListAdapter;
    ListView listView;
    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
        SetContentView(Resource.Layout.activity_main);
        List<InventorySlabs> remnantList = new List<InventorySlabs>();
        for(var i = 0; i < 10; i++)
        {
            InventorySlabs inventorySlabs = new InventorySlabs();
            inventorySlabs.Depth = i.ToString();
            inventorySlabs.ExtSlabNo = i.ToString();
            inventorySlabs.Finish = "Finish" + i.ToString();
            inventorySlabs.Height = 200;
            inventorySlabs.SellName = "SellName" + i.ToString();
            inventorySlabs.Status = "Status" + i.ToString();
            inventorySlabs.Width = 400;
            remnantList.Add(inventorySlabs);
        }
        listView = FindViewById<ListView>(Resource.Id.listView1);
        remnantListAdapter = new RemnantListAdapter(this, remnantList);
        listView.Adapter = remnantListAdapter;
    }

    protected override void OnActivityResult(int requestCode, [GeneratedEnum] Result resultCode, Intent data)
    {
        remnantListAdapter.ActivityResult(requestCode, resultCode, data);
        listView.Adapter = remnantListAdapter;
    }      
}

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