如何自定义DialogFragment？

<!-- res/layout/custom_dialog.xml -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="16dp">

    <TextView
        android:id="@+id/dialog_title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Custom Dialog"
        android:textSize="18sp"
        android:textStyle="bold"/>

    <EditText
        android:id="@+id/dialog_input"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter something"/>

    <Button
        android:id="@+id/dialog_button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Submit"/>
</LinearLayout>

import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AlertDialog;
import androidx.fragment.app.DialogFragment;

public class CustomDialogFragment extends DialogFragment {

    @NonNull
    @Override
    public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setView(R.layout.custom_dialog)
               .setTitle("Custom Dialog")
               .setPositiveButton("Submit", new DialogInterface.OnClickListener() {
                   public void onClick(DialogInterface dialog, int id) {
                       // Handle the submit action
                   }
               });
        return builder.create();
    }
}

CustomDialogFragment newFragment = new CustomDialogFragment();
newFragment.show(getSupportFragmentManager(), "custom_dialog");

@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setRetainInstance(true);
}

<!-- res/values/styles.xml -->
<style name="CustomDialogTheme" parent="Theme.AppCompat.Light.Dialog.Alert">
    <item name="android:windowBackground">@color/custom_background</item>
    <item name="android:textColorPrimary">@color/custom_text_color</item>
</style>

@Override
public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity(), R.style.CustomDialogTheme);
    // 其他设置...
    return builder.create();
}