Question

我有两个三星平板电脑（三星SM-T580 Android 7.0和SM-T280 Android 5.1）。我有一个带有自定义适配器的列表视图。它在SM-T580上运行良好，但在方法的第一次迭代时崩溃了：

public override View GetView(int position, View convertView, ViewGroup parent)

在SM-T280平板电脑上。我不明白它如何在SM-T580上完美运行并且在SM-T280上崩溃。崩溃时的错误消息是：

应用程序处于中断模式。

您的应用已进入中断状态，但没有要显示的代码，因为所有线程都在执行外部代码（通常是系统或框架代码。）

我将编译器设置为：

Compile using Android version: (Target Framework)
Android 5.1 (Lollipop)

我正在使用Visual Studio 2017和Xamarin。

以下是我的代码。

布局代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TableLayout
        android:minWidth="25px"
        android:minHeight="25px"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:stretchColumns="2"
        android:id="@+id/tableLayout1">
        <TableRow
            android:id="@+id/tableRow1"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:layout_weight="1">
            <TextView
                android:id="@+id/CompanyNameLabel"
                android:text=""
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:layout_column="1"
                android:layout_gravity="left"
                android:textStyle="bold"
                android:textSize="16sp"
                android:padding="8dip" />
            <TextView
                android:id="@+id/CompanySalesLabel"
                android:text=""
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:layout_column="2"
                android:layout_gravity="right"
                android:padding="8dip" />
        </TableRow>
    </TableLayout>
    <TextView
        android:id="@+id/CompanyAddressLabel"
        android:text=""
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingLeft="20dip" />
    <TextView
        android:id="@+id/CompanyCityStateZipLabel"
        android:text=""
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingLeft="20dip" />
</LinearLayout>

视图持有人代码：

public class MyMainCompanyRowHolder : Java.Lang.Object
{
    public TextView CompanyName { get; set; }
    public TextView CompanyAddress { get; set; }
    public TextView CompanySales { get; set; }
    public TextView CompanyCityStateZipLabel { get; set; }
    public static T Cast<T>(Java.Lang.Object obj) where T : MyMainCompanyRowHolder
    {
        var propInfo = obj.GetType().GetProperty("Instance");
        return propInfo == null ? null : propInfo.GetValue(obj, null) as T;
    }
}

自定义适配器：

public class ListAdapter : BaseAdapter<Company>
{
    List<Company> company;
    Activity context;

    public ListAdapter(Activity currentContext, List<Company> companyList) : base()
    {
        this.company = companyList;
        this.context = currentContext;

    }

    public override Company this[int position]
    {
        get { return company.ToArray()[position]; }
    }

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

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

    public override View GetView(int position, View convertView, ViewGroup parent)
    {
        Models.ViewHolder.MyMainCompanyRowHolder myViewHolder = null;

        View view = convertView;

        if (view != null)
            myViewHolder = Models.ViewHolder.MyMainCompanyRowHolder.Cast<Models.ViewHolder.MyMainCompanyRowHolder>(view.Tag);

        if (myViewHolder == null)
        {
            myViewHolder = new Models.ViewHolder.MyMainCompanyRowHolder();
            //view = context.LayoutInflater.Inflate(Android.Resource.Layout.SimpleListItem1, null);
            view = context.LayoutInflater.Inflate(Resource.Layout.MainCompanyListRow, null);

            myViewHolder.CompanyName = view.FindViewById<TextView>(Resource.Id.CompanyNameLabel);
            myViewHolder.CompanyAddress = view.FindViewById<TextView>(Resource.Id.CompanyAddressLabel);
            myViewHolder.CompanySales = view.FindViewById<TextView>(Resource.Id.CompanySalesLabel);
            myViewHolder.CompanyCityStateZipLabel = view.FindViewById<TextView>(Resource.Id.CompanyCityStateZipLabel);

            view.Tag = myViewHolder;

        }
        myViewHolder.CompanyName.Text = company.ToArray()[position].CompanyName;
        myViewHolder.CompanyAddress.Text = company.ToArray()[position].Address;
        myViewHolder.CompanySales.Text = company.ToArray()[position].ActualSales.ToString("C0");
        myViewHolder.CompanyCityStateZipLabel.Text = company.ToArray()[position].City + ", " + company.ToArray()[position].State + " " + company.ToArray()[position].Zip;  
        return view;
    }
}

活动模块中的调用：

myCompany = myDBF.getCompany("");
var listView = FindViewById<ListView>(Resource.Id.OrderMethodListView);
listView.Adapter = new Models.Adapters.ListAdapter(this, myCompany);

Answer 1

谢谢！我想到了。 Android 5.1不喜欢：

android:layout_weight="1" 
android:layout_column="1" 
android:layout_gravity="left"

一旦我从布局代码中删除了这些行，该应用就可以正常工作。

在SM-T280平板电脑上使用自定义适配器崩溃的Android ListView

1 个答案: