android - 将参数从第二个对话 fragment 传递到第一个对话 fragment

Question

我有两个对话 fragment 。

我在第一个 dialog fragment 中有一个 TextView，当用户点击它时，将带您到第二个 dialog fragment，其中用户在 EditText 中添加评论。当用户完成输入评论后，单击done 按钮返回到第一个dialog fragment。到目前为止一切顺利。

我的问题是如何将参数(用户评论)传递给第一个dialog fragment textView？

第一个 DialogFragment

namespace MyApp
{
    public class Report:DialogFragment
    {
        String comment;
        public Report ()
        {
        }
        public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
        {
            base.OnCreateView (inflater, container, savedInstanceState);

            var view = inflater.Inflate(Resource.Layout.Report, container, false);
            var textView = view.FindViewById<TextView> (Resource.Id.comment);

            textView.Click += TextView_Click;
            return view;
        }

        void TextView_Click (object sender, EventArgs e)
        {
            ShowDialog ();
        }

        public void ShowDialog()
        {
            var transaction = FragmentManager.BeginTransaction();
            var dialogFragment = new Comment();
            dialogFragment.Show(transaction, "dialog_fragment");
        }
    }
}

第二个 DialogFragment

namespace MyApp
{
    public class Comment:DialogFragment
    {   

        EditText comment;

        public Comment ()
        {
        }
        public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
        {
            base.OnCreateView (inflater, container, savedInstanceState);

            var view = inflater.Inflate(Resource.Layout.Comment, container, false);

            comment = view.FindViewById<EditText> (Resource.Id.myText);

            Button doneBtn = view.FindViewById<Button> (Resource.Id.doneBtn);
            doneBtn.Click += DoneBtn_Click;
            return view;
        }

        void DoneBtn_Click (object sender, EventArgs e)
        {
            String str = comment.Text;
            Console.WriteLine (str);
            this.Dismiss ();
        }
    }
}

Answer 1

我得到了答案:

我在第二个对话框 fragment 中添加了以下代码:

void DoneBtn_Click (object sender, EventArgs e)
{
   String str = comment.Text;
   // the following lines are added
   Bundle args = new Bundle ();
   args.PutString ("comment", str);
   var transaction = FragmentManager.BeginTransaction();
   var dialogFragment = new Report();
   dialogFragment.Arguments= args;
   dialogFragment.Show(transaction, "dialog_fragment");
   this.Dismiss ();
}

我在第一个对话框 fragment 中添加了以下代码:

public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
   // the following lines are added
    Bundle args = Arguments;
    if (args != null) {
      String returnString = args.GetString ("comment");
    }
}

void TextView_Click (object sender, EventArgs e)
{
    ShowDialog ();
 // dismiss the first dialogFragment
    this.Dismiss ();
}