错误：无法使用 viewpager2 中 FragmentStateAdapter 中提供的参数调用以下函数

Question

查看我的代码

我在片段中使用 viewpager 2 来保存子片段。可以有“n”个子片段。它在适配器中显示 lint 错误。

//查看我的片段代码

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        val docs = mutableListOf(1,2,3,4,5,6,7,8,9)

        view_pager.adapter = DocAdapter(childFragmentManager,lifecycle,docs)

    }

//我的适配器代码

    import androidx.fragment.app.Fragment
    import androidx.fragment.app.FragmentManager
    import androidx.lifecycle.Lifecycle
    import androidx.viewpager2.adapter.FragmentStateAdapter
    
    class DocAdapter(fa: FragmentManager, lifecycle: Lifecycle, private val docs : MutableList<Int>) :
FragmentStateAdapter(fa) {
    
        override fun getItemCount(): Int = docs.size
    
        override fun createFragment(position: Int): Fragment = DocUploadFragment().newInstance(docs[position])
    }

lint 错误在适配器类的以下行中

class DocAdapter(fa: FragmentManager, lifecycle: Lifecycle, private val docs : MutableList<Int>) :
FragmentStateAdapter(fa) {

Answer 1

FragmentStateAdapter 在其构造函数中需要 FragmentManager 和 Lifecycle。将您的 DocAdapter 更改为：

class DocAdapter(fa: FragmentManager, lifecycle: Lifecycle, private val docs : MutableList<Int>) :
    FragmentStateAdapter(fa, lifecycle) {
    ...
}