Question

我有多个EditTexts的ListView，EditTexts由用户填写。当我填充EditTexts并关闭键盘时，不会保存新的EditTexts值并显示旧值。所有属性都是默认属性。我正在真实设备SGS3上调试应用程序。

我的ListView适配器：

public class OrderListViewAdapter :  BaseAdapter<Product>
{
    private readonly Activity _context;
    public string _uLogin;
    public string _uPass;
    public string _routeId;
    public string _groupId;

    List<Product> Products = new List<Product> ();

    public OrderListViewAdapter (Activity context,UserInfo uInfo,string routeId,string groupId)
    {
        _context = context;
        _routeId = routeId;
        _groupId = groupId;


        foreach (TradepointInfo tInfo in uInfo.Tradepoint) {

            if ( Int32.Parse(tInfo.Id).ToString() == routeId  ) {
                foreach (Product p in tInfo.Products) {
                    if (p.Group == groupId) {
                        Products.Add (new Product {
                            ID = p.ID,
                            Name = p.Name,
                            Route = p.Route,
                            Quantity = p.Quantity,
                            Price = p.Price,
                            Group = p.Group
                        });
                    }
                }


            }

        }
    }


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

    public override long  GetItemId(int position)
    {
        return  Int64.Parse( Products[position].ID);
    }

    public override   Product this[int position]
    {
        get{return  Products[position];}
    }

    public override View GetView(int position, View convertView, ViewGroup parent)
    {
        View view = convertView;
        if (view == null)
            view = _context.LayoutInflater.Inflate(Resource.Layout.OrderListItem, null);



        view.FindViewById<TextView> (Resource.Id.productNameTextView).Text = Products [position].Name;
        view.FindViewById<EditText> (Resource.Id.quantityEditText).Text = Products[position].Quantity;

        return view;
    }

}

OrderList.axml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/productSearchEditText"
        android:textSize="18sp"
        android:visibility="gone" />
    <TextView
        android:text="Route Name"
        android:layout_width="match_parent"
        android:layout_height="42.7dp"
        android:id="@+id/ordRouteNameTextView"
        android:textSize="18sp"
        android:layout_marginLeft="5dp" />
    <ListView
        android:minWidth="25px"
        android:minHeight="25px"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/orderListView" />
</LinearLayout>

OrderListItem.axml：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:p1="http://schemas.android.com/apk/res/android"
    p1:minWidth="25px"
    p1:minHeight="25px"
    p1:layout_width="match_parent"
    p1:layout_height="wrap_content"
    p1:id="@+id/orderRelativeLayout">
    <TextView
        p1:text="Product Name"
        p1:layout_width="227.9dp"
        p1:layout_height="63.0dp"
        p1:id="@+id/productNameTextView"
        p1:layout_marginLeft="5dp"
        p1:textSize="18sp"
        p1:layout_marginBottom="14.6dp"
        p1:layout_marginRight="23.6dp" />
    <EditText
        p1:layout_width="50.9dp"
        p1:layout_height="wrap_content"
        p1:layout_toRightOf="@id/productNameTextView"
        p1:id="@+id/quantityEditText"
        p1:layout_marginRight="0.0dp"
        p1:layout_marginLeft="6.7dp" />
</RelativeLayout>

OrderActivity：

 public class OrderActivity : Activity {
 string projectDir = Path.Combine(Android.OS.Environment.ExternalStorageDirectory.Path,"StarSoftMobile");

        protected override void OnCreate (Bundle bundle)
        {
            base.OnCreate (bundle);
            SetContentView (Resource.Layout.OrderList);

            string routeId = Intent.GetStringExtra ("RouteId") ?? "Empty";
            string routeName = Intent.GetStringExtra ("RouteName") ?? "Empty";
            string groupId = Intent.GetStringExtra ("GroupId") ?? "Empty"; 
            string groupName = Intent.GetStringExtra ("GroupName") ?? "Empty"; 


            ListView _orderListView = FindViewById<ListView> (Resource.Id.orderListView);
            TextView _ordRouteNameTextView = FindViewById<TextView> (Resource.Id.ordRouteNameTextView);
            _ordRouteNameTextView.Text = routeName;

            string uInfoFromDevice = File.ReadAllText (projectDir + "/" + "Routes.json");

            UserInfo uInfo = JsonConvert.DeserializeObject<UserInfo> (uInfoFromDevice);

            OrderListViewAdapter _adapter = new OrderListViewAdapter (this,uInfo,routeId,groupId);
            _adapter.NotifyDataSetChanged ();
            _orderListView.Adapter = _adapter; 

        }
    }

Answer 1

您的编辑文字是列表视图项目中的视图编辑时需要将其保存到模型中（适配器的数据）因此，您需要在适配器的getView()方法中保存和更新编辑文本，如下所示：

            //find your edit text
            EditText edit = (EditText) rowView.findViewById(R.id.mytext);
            //[A]display your text from yourArrayText base on position as usual
            edit.setText(yourArrayText.get(position).getText());
            //save the position for this edit text
            edit.setTag(position);

            edit.setOnFocusChangeListener(new OnFocusChangeListener() {
                public void onFocusChange(View v, boolean hasFocus) {
                    if (!hasFocus){
                        //get position from EditText which is been editing
                        int c_position = (Integer) v.getTag();
                        //update the text at the position, text will update at [A]
                        EditText input = (EditText)v;
                        yourArrayText.get(c_position).setText(input.getText().toString());
                    }
                }
            });

为什么不保存当前的EditText值？

1 个答案: