如何将布局从xml添加到Extended FrameLayout Android？

<?xml version="1.0" encoding="utf-8"?>
<com.example.myapplication.ExtendedFrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!-- 在这里添加子视图 -->

</com.example.myapplication.ExtendedFrameLayout>

package com.example.myapplication;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.FrameLayout;

public class ExtendedFrameLayout extends FrameLayout {

    public ExtendedFrameLayout(Context context) {
        super(context);
    }

    public ExtendedFrameLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ExtendedFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    // 在这里添加您的自定义功能
}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

   <include layout="@layout/my_extended_frame_layout" />

</LinearLayout>