Java 膨胀DialogFragment时出错：指定的子级已具有父级。必须对子对象&x27；调用removeView（）；她先是父母

在尝试膨胀包含RecyclerView的FragmentDialog时，我遇到了这样一个错误：“指定的子项已具有父项。您必须首先对子项的父项调用removeView（）。”

以下是我的DialogFragment中的代码：

public class MyDialogFragment extends AppCompatDialogFragment {

    private static final String DATA = "data";

    private MyDialogFragment.MyDialogFragmentListener listener;

    private ArrayList<MyArrayList> mArrayListData;

    public static MyDialogFragment newInstance(ArrayList<MyArrayList> ArrayListData) {

        Bundle args = new Bundle();

        MyDialogFragment fragment = new MyDialogFragment();

        args.putParcelableArrayList(DATA, ArrayListData);
        fragment.setArguments(args);

        return fragment;
    }

    @NonNull
    @Override
    public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {

        if (getArguments() != null) {

            mArrayListData = getArguments().getParcelableArrayList(DATA);

        }

        AlertDialog.Builder builder = new AlertDialog.Builder(requireActivity());
        builder.setView(createRecyclerView(mArrayListData))
                .setTitle(requireContext().getString(R.string.title))
                .setPositiveButton(requireContext().getString(R.string.ok_button), null);

        Dialog dialog = builder.create();

        /* Option set cause  key board doesn't appear */
        dialog.show();
        Objects.requireNonNull(dialog.getWindow()).clearFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);
        dialog.setCanceledOnTouchOutside(false);

        return dialog;
    }

    @Override
    public void onResume() {
        super.onResume();

        final AlertDialog MyAlertDialog = (AlertDialog) getDialog();
        if (MyAlertDialog != null) {
            Button positiveButton = MyAlertDialog.getButton(Dialog.BUTTON_POSITIVE);
            positiveButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {

                    ...
                    dismiss();
                    
                }
            });
        }
    }

    @Override
    public void onAttach(@NonNull Context context) {
        super.onAttach(context);

        try {
            listener = (MyDialogFragment.MyDialogFragmentListener) context;
        } catch (ClassCastException e) {
            throw new ClassCastException(context.toString() +
                    "must implement ExampleDialogListener");
        }
    }

    public interface MyDialogFragmentListener {
        void MyDialogFragmentListenerReturn(ArrayList<MyArrayList> ArrayListData);
    }

    private RecyclerView createRecyclerView(final ArrayList<MyArrayList> ArrayListData){

        LayoutInflater inflater = requireActivity().getLayoutInflater();

        View view = inflater.inflate(R.layout.fragmentLayout, null, false);

        RecyclerView MyRecyclerView = view.findViewById(R.id.recyclerViewId);
        MyRecyclerAdapter myAdapter = new MyRecyclerAdapter (getActivity(), ArrayListData);
        MyRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
        MyRecyclerView.setAdapter(myAdapter);

        myAdapter.setOnItemClickListener(new MyRecyclerAdapter.OnItemClickListener() {

            @Override
            public void onReturnValue(int position, int value) {

                mArrayListData.get(position).setValue(value);
            }

        });

        return MyRecyclerView;
    }
}

---

它将问题指向我的DialogFragment的“dialog.show（）；”。我得承认，我完全迷路了。我有另一个DialogFragment，它以同样的方式工作，没有问题。

我解决了我的问题，我最初认为它来自我的java代码，但它是一个xml布局问题

我的DialogFrament布局如下：

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:backgroundTint="#FF8200"
    android:orientation="vertical"
    android:padding="16dp"
    tools:context=".MyDialogFragment ">

    <TextView
        android:id="@+id/textViewId"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:textSize="16sp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerViewId"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textViewId" />

</androidx.constraintlayout.widget.ConstraintLayout>

我只需要使用RecyclerView作为布局的唯一元素：

<androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/recyclerViewId"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:backgroundTint="#FF8200"
    android:nestedScrollingEnabled="false"
    android:padding="16dp"
    tools:context=".MyDialogFragment "
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

---

我解决了我的问题，我最初认为它来自我的java代码，但这是一个xml布局问题

我的DialogFrament布局如下：

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:backgroundTint="#FF8200"
    android:orientation="vertical"
    android:padding="16dp"
    tools:context=".MyDialogFragment ">

    <TextView
        android:id="@+id/textViewId"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:textSize="16sp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerViewId"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textViewId" />

</androidx.constraintlayout.widget.ConstraintLayout>

我只需要使用RecyclerView作为布局的唯一元素：

<androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/recyclerViewId"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:backgroundTint="#FF8200"
    android:nestedScrollingEnabled="false"
    android:padding="16dp"
    tools:context=".MyDialogFragment "
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

我在对话框fragment的createRecyclerView函数中尝试了这一点：

查看视图=充气机.inflate（R.layout.fragmentLayout，null，false）；if（view！=null）{ViewGroup parent=（ViewGroup）view.getParent（）；if（parent！=null）{parent.removeView（view）；}}

不起作用我在对话框fragment的createRecyclerView函数中尝试过：

view view=inflater.inflate（R.layout.fragmentLayout，null，false）；if（view！=null）{ViewGroup parent=（ViewGroup）view.getParent（）；if（parent！=null）{parent.removeView（view）；}}

它不工作