title.xml为设置在activity_main.xml中的布局

class TitleLayout(context: Context, attrs: AttributeSet) : LinearLayout(context, attrs) {

    private lateinit var titleind: TitleBinding

    init {
        LayoutInflater.from(context).inflate(R.layout.title, this)

        val root = View.inflate(context, R.layout.title, this)
        titleind = TitleBinding.bind(root)
        titleind.titleBack.setOnClickListener {
            val activity = context as Activity
            activity.finish()
        }
        titleind.titleEdit.setOnClickListener {
            Toast.makeText(context, "You clicked Edit button", Toast.LENGTH_SHORT).show()
        }
    }
}