xamarin android bundle put parcelable 数组

Question

我需要在包中保存对象数组，这是我所做的:

创建 class 实现 IParcable 接口的内容：

 public class SimpleSelectorItem : Java.Lang.Object, Android.OS.IParcelable
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public bool Selected { get; set; }

        IntPtr IJavaObject.Handle { get { return IntPtr.Zero; } }

        public int DescribeContents()
        {
            return 0;
        }

        public SimpleSelectorItem()
        {

        }

        public SimpleSelectorItem(int id, string name)
        {
            Id = id;
            Name = name;
        }

        public SimpleSelectorItem(Parcel parcel)
        {
            Id = parcel.ReadInt();
            Name = parcel.ReadString();
        }

        public void WriteToParcel(Parcel dest, [GeneratedEnum] ParcelableWriteFlags flags)
        {
            dest.WriteInt(Id);
            dest.WriteString(Name);
        }

        static readonly GenericParcelableCreator<SimpleSelectorItem> _creator
       = new GenericParcelableCreator<SimpleSelectorItem>((parcel) => new SimpleSelectorItem(parcel));

        [ExportField("CREATOR")]
        public static GenericParcelableCreator<SimpleSelectorItem> GetCreator()
        {
            return _creator;
        }
    }

当我创建片段的实例时，尝试在包中设置 SimpleSelectorItem 数组：

     var items = _viewModel.GetEmployees().Select(l => new SimpleSelectorItem(l.Id, l.LegalName)).ToArray();
      ....
     args.PutParcelableArray(ITEMS, items);

但是当我取回这个数组时，它是空数组..

 var items = Arguments.GetParcelableArray(ITEMS);

这是演示应用程序，它在我尝试投射项目时抛出异常： https://github.com/Nininea/XamarinAndroidPutParcelableArray

Answer 1

But when I'm getting back this array, it is array of nulls..

我测试过 project.The 数据正确传递，但转换失败。

要解决此问题，您需要以不同方式转换数组：

在SetData方法中：

private void SetData(View rootView)
    {
       ...
       //use the following line to retrieve and cast the items to SimpleSelectorItem[]
        var items = Arguments.GetParcelableArray(ITEMS).Cast<SimpleSelectorItem>().ToList();

        _lvSelector = (ListView)rootView.FindViewById(Resource.Id.lvSelector);
        //pass the items to your adapter.
        SimpleSelectorListAdapter adapter = new SimpleSelectorListAdapter(Activity, items);
        _lvSelector.Adapter = adapter;
    }

xamarin android bundle put parcelable 数组

xamarin android bundle put parcelable array

android

bundle

parcelable

xamarin.android