由于上下文错误导致片段出现问题

Question

我正在尝试使用Kotlin在Android Studio中创建一个可扩展列表。我想在片段中显示此列表，但是代码不起作用。我已经找到了问题，并进行了很多次搜索来解决此问题，但我将无法正常工作。 [已经将“ this”更改为getContext（）]。请给我一些小费，以便我继续。.

    expandableListView.setAdapter(MyAdapter(getContext(),expandableListView, header, body))

        return inflater.inflate(R.layout.fragment_help, container, false)    

    class MyAdapter(var context: Context, var expandableListView : ExpandableListView, var header: MutableList<String>, var body: MutableList<MutableList<String>>) : BaseExpandableListAdapter(){
    override fun getGroup(groupPosition: Int): String {
        return header[groupPosition]
    }

    override fun isChildSelectable(groupPosition: Int, childPosition: Int): Boolean {
        return true
    }

    override fun hasStableIds(): Boolean {
        return false
    }

    override fun getGroupView(groupPosition: Int, isExpanded: Boolean, convertView: View?, parent: ViewGroup?): View? {
        var convertView = convertView
        if (convertView == null){
            val inflater = context.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
            convertView = inflater.inflate(R.layout.parent_layout, null)
        }
        val title = convertView?.findViewById<TextView>(R.id.tv_title)
        title?.text = getGroup(groupPosition)
        title?.setOnClickListener {
            if (expandableListView.isGroupExpanded(groupPosition))
                expandableListView.collapseGroup(groupPosition)
            else
                expandableListView.expandGroup(groupPosition)
            Toast.makeText(context, getGroup(groupPosition), Toast.LENGTH_SHORT).show()
        }
        return convertView
    }

    override fun getChildrenCount(groupPosition: Int): Int {
        return body[groupPosition].size
    }

    override fun getChild(groupPosition: Int, childPosition: Int): String {
        return body[groupPosition][childPosition]
    }

    override fun getGroupId(groupPosition: Int): Long {
        return groupPosition.toLong()
    }

    override fun getChildView(
        groupPosition: Int,
        childPosition: Int,
        isLastChild: Boolean,
        convertView: View?,
        parent: ViewGroup?
    ): View? {
        var convertView = convertView
        if(convertView == null){
            val inflater = context.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
            convertView = inflater.inflate(R.layout.child_layout,null)
        }
        val title = convertView?.findViewById<TextView>(R.id.tv_title)
        title?.text = getChild(groupPosition,childPosition)
        title?.setOnClickListener {
            Toast.makeText(context, getChild(groupPosition,childPosition),Toast.LENGTH_SHORT).show()
        }
        return convertView    }

    override fun getChildId(groupPosition: Int, childPosition: Int): Long {
        return childPosition.toLong()
    }

    override fun getGroupCount(): Int {
        return header.size
    }


}