在片段和片段对话框之间通信 [英] Communicate between fragment and fragment dialog

问题描述

我对SO进行了有关片段和片段对话框之间的通信的研究，发现setTargetFragment和接口是一种方法。但是，当我尝试设置setTargetFragment时出现此错误。

I researched on SO about communicating between fragment and fragment dialog, and I found that setTargetFragment and an interface is an approach. But I get this error when I try to setTargetFragment.

Fragment类型的setTargetFragment（Fragment，int）方法不适用于参数（SettingsDetailsFragment，int）。我还没有使用过片段，而我是android的新手。
所以我有这个片段：

The method setTargetFragment(Fragment, int) in the type Fragment is not applicable for the arguments (SettingsDetailsFragment, int). I haven;t use fragments until now and I'm new on android. So i have this fragment:

   public class SettingsDetailsFragment extends Fragment implements
        NoticeDialogFragment.EmailChangedListner {

        public void emailUpdateFromDialog()
        {
         DialogFragment modifyEmailFragment = new ModifyEmailFragment();
        //here is where i get the error
        modifyEmailFragment.setTargetFragment(this, 0);`enter code here`

        modifyEmailFragment.show(getActivity().getFragmentManager(),
            "email");
  }
}

  // class where i have the interface
  public class NoticeDialogFragment extends DialogFragment {
    public interface EmailChangedListner {
    public void emailChanged(String text);
  }

}

 // the dialogFragment
 public class ModifyEmailFragment extends DialogFragment {

   @Override
   public Dialog onCreateDialog(Bundle savedInstanceState) {
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

    // Get the layout inflater
    LayoutInflater inflater = getActivity().getLayoutInflater();

    // Inflate and set the layout for the dialog
    // Pass null as the parent view because its going in the dialog layout
    final View v_iew = inflater.inflate(R.layout.email_dialog, null);

    builder.setView(v_iew)

            // Add action buttons
            .setPositiveButton(R.string.modifyBtn_settings,
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int id) {

                            EditText userEmail = (EditText) v_iew
                                    .findViewById(R.id.modifyEmail);
                            boolean validateEmail = BookMeUtils
                                    .validateEmail(userEmail.getText()
                                            .toString());

                            if (validateEmail == false) {
                                BookMeUtils.enterValidEmail(getActivity());
                            }

                            if (!(userEmail.getText().toString().length() == 0)) {

                                if (validateEmail == true) {
                                    Fragment parentFragment = getTargetFragment();
                                    ((EmailChangedListner) parentFragment)
                                            .emailChanged(userEmail
                                                    .getText().toString());
                                }
                            } else {

                            }
                        }
                    })
            .setNegativeButton(R.string.cancel_r,
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int id) {
                            ModifyEmailFragment.this.getDialog().cancel();
                        }
                    });

    return builder.create();
}

}

推荐答案

在您的 SettingsDetailsFragment 类中检查 Fragment 的导入。是导入 android.support.v4.app.Fragment 还是 android.app.Fragment 。

Check the import for Fragment in your SettingsDetailsFragment class. Is it importing android.support.v4.app.Fragment or android.app.Fragment.

可能性是您正在设置 android.support.v4.app 片段 >作为DialogFragment的目标，该目标是 android.app 。

Possibility is that you are setting Fragment of android.support.v4.app as the target of DialogFragment which is of android.app.

这篇关于在片段和片段对话框之间通信的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！