Question

我有一个ViewPager2，显示了3种具有不同内容的不同布局。一切工作正常，但我想在活动中访问这些布局的视图，而不是从适配器固定器访问。

这是我的适配器的支架：-

class ServiceRequestViewHolder( _itemView: View, _context: Context) : RecyclerView.ViewHolder(_itemView) {
    // context
    private val cxt: Context = _context

    // view
    private var v: View = _itemView
    
     /**
     * this fun is called from the onBindViewHolder of the adapter and
     * handles the switching of the layouts
     *
     * @param position
     */
    fun navigation(
        position: Int
    ): View? {

        val inflater: LayoutInflater = LayoutInflater.from(cxt)

        val parentContainer = v.findViewById<LinearLayout>(R.id.viewContainer)

        when (position) {
            0 -> {
                v =
                    inflater.inflate(R.layout.layout_one, null)
                    
                    // i don't want to do this
                    val button = v.findViewById<Button>(R.id.button_in_layout_one)
                    button.setOnClickListener {
                        // handle button click event
                    }
            }
            1 -> {
                v =
                    inflater.inflate(R.layout.layout_two, null)
            }
            2 -> {
                v =
                    inflater.inflate(R.layout.layout_three, null)
            }
        } // when loop

        parentContainer.addView(v)
        return v    
    }       
}

所以我在Activity类中尝试了类似的东西；

private var pageChangeCallback = object : ViewPager2.OnPageChangeCallback() {
    override fun onPageSelected(position: Int) {
        super.onPageSelected(position)
    }
}

// in onCreate
viewPager2.registerOnPageChangeCallback(pageChangeCallback)

是否可以访问onPageSelected的position参数并使用它来获取当前视图？任何帮助表示赞赏。谢谢

从活动访问viewpager2布局视图

0 个答案: