在片段之间传递字符串[]。怎么做？

Question

片段 1:

lst.ItemClick += delegate(object sender, AdapterView.ItemClickEventArgs e) {

    var intent = new Intent (this, typeof(TracksByGenres));
    intent.PutStringArrayListExtra ("keys", items);
    StartActivity (intent);
   };

TracksByGenres 是 fragment2

Error:The best overloaded method match for `Android.Content.Intent.Intent(Android.Content.Context, System.Type)' has some invalid arguments atnew Intent (this, typeof(TracksByGenres));

片段 2：

public async override void OnActivityCreated(Bundle savedInstancesState)
  {
   base.OnActivityCreated (savedInstancesState);
   paramKey = Intent.Extras.GetStringArray ("keys").ToString();

   lst = View.FindViewById<ListView> (Resource.Id.lstHome);

哪里不对？

Answer 1

var intent = new Intent (this, typeof(TracksByGenres));
            intent.PutStringArrayListExtra ("keys", items);
            StartActivity (intent);

以上代码段是创建新 Activity 的实例并启动它。第二个参数，typeof(TracksByGenres) 实际上应该是 typeof(A class inheriting from Actiivty (not fragment)) 这是导致异常的原因。

为了切换片段，您需要使用 FragmentTransaction 。这是关于 how to manage fragments.

的教程

编辑：将数据传递给 Fragment 的示例，在评论中询问

public class TracksByGenres :Fragment
{
  string mData;
  public void AddData(string data)
  {
     mData=data;
  }
  public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
      // inflate layout and store in variable
       //you can use data here
       // myTextView.Text=mData;
   }
}

然后在Activity,

创建第一个片段，在 FrameLayout 中添加数据和加载

FragmentTransaction fragmentTx = this.FragmentManager.BeginTransaction();
TracksByGenres fragment = new TracksByGenres();

fragment.AddData("Xamarin is awesome");
// The fragment will have the ID of Resource.Id.fragment_container.
fragmentTx.Add(Resource.Id.fragment_container, fragment);

// Commit the transaction.
fragmentTx.Commit();

正在用新片段替换片段，添加数据。在此示例中，我使用相同的片段以方便使用。

TracksByGenres aDifferentDetailsFrag = new TracksByGenres();

aDifferentDetailsFrag.AddData("Xamarin is awesome");

// Replace the fragment that is in the View fragment_container (if applicable).
fragmentTx.Replace(Resource.Id.fragment_container, aDifferentDetailsFrag);

// Add the transaction to the back stack.
fragmentTx.AddToBackStack(null);

// 提交事务。 fragmentTx.Commit();

在片段之间传递字符串[]。怎么做？

Passing string[] between fragment. How to do that?

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