我无法从另一个带有 recyclerview.adaper 的片段中打开带有 recyclerview.adapter 的片段
Posted
技术标签:
【中文标题】我无法从另一个带有 recyclerview.adaper 的片段中打开带有 recyclerview.adapter 的片段【英文标题】：I cant open one fragmnet with recyclerview.adaper from another fragment with recyclerview.adaper 【发布时间】：2021-11-23 16:59:43 【问题描述】：MainActivity
class MainActivity : AppCompatActivity(), MovieListAdapter.ItemClickListener
override fun onCreate(savedInstanceState: Bundle?)
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
supportFragmentManager.beginTransaction().apply
add(R.id.flMain, FragmentMovieList())
commit()
override fun onItemClick()
supportFragmentManager.beginTransaction().apply
replace(R.id.flMain, FragmentMoviesDetails())
addToBackStack(null)
.commit()
第一适配器
class MovieListAdapter: RecyclerView.Adapter<MovieListAdapter.ViewHolder>()
private var list = listOf<Movie>()
private var itemclick: ItemClickListener? = null
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder
return ViewHolder(LayoutInflater.from(parent.context).inflate(R.layout.view_holder_movie,parent,false))
override fun onBindViewHolder(holder: ViewHolder, position: Int)
val movie = list[position]
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
holder.avatar?.setImageDrawable(holder.itemView.context.getDrawable(movie.avatar))
holder.years?.text = movie.years
holder.heart?.setImageDrawable(holder.itemView.context.getDrawable(movie.heart_avatar))
holder.genre?.text = movie.genre
holder.star1?.setImageDrawable(holder.itemView.context.getDrawable(movie.star1))
holder.star2?.setImageDrawable(holder.itemView.context.getDrawable(movie.star2))
holder.star3?.setImageDrawable(holder.itemView.context.getDrawable(movie.star3))
holder.star4?.setImageDrawable(holder.itemView.context.getDrawable(movie.star4))
holder.star5?.setImageDrawable(holder.itemView.context.getDrawable(movie.star5))
holder.review?.text = movie.reviews
holder.name?.text = movie.name
holder.time?.text = movie.time
holder.rvActor?.apply setOnClickListener
itemclick?.onItemClick()
fun bindActors(newMovie: List<Movie>)
list = newMovie
notifyDataSetChanged()
override fun getItemCount(): Int = list.size
class ViewHolder(view: View): RecyclerView.ViewHolder(view)
val avatar: ImageView? = itemView.findViewById(R.id.ivMain)
val years: TextView? = itemView.findViewById(R.id.tvYears)
val heart: ImageView? = itemView.findViewById(R.id.ivHeart)
val genre: TextView? = itemView.findViewById(R.id.tvGenre)
val star1: ImageView? = itemView.findViewById(R.id.ivStar1)
val star2: ImageView? = itemView.findViewById(R.id.ivStar2)
val star3: ImageView? = itemView.findViewById(R.id.ivStar3)
val star4: ImageView? = itemView.findViewById(R.id.ivStar4)
val star5: ImageView? = itemView.findViewById(R.id.ivStar5)
val review: TextView? = itemView.findViewById(R.id.tvReviews)
val name: TextView? = itemView.findViewById(R.id.tvName)
val time: TextView? = itemView.findViewById(R.id.tvTime)
val rvActor: RecyclerView? = itemView.findViewById(R.id.rvActors)
interface ItemClickListener
fun onItemClick()
第二适配器
class MovieDetailAdapter: RecyclerView.Adapter<MovieDetailAdapter.ViewHolder>()
private var listDetail = listOf<MovieDetail>()
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder
return ViewHolder(
LayoutInflater.from(parent.context).inflate(R.layout.view_holder_actor, parent, false)
)
override fun onBindViewHolder(holder: MovieDetailAdapter.ViewHolder, position: Int)
val detail = listDetail[position]
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
holder.imageDetail?.setImageDrawable(holder.itemView.context.getDrawable(detail.imageDetail))
holder.detailName?.text = detail.detailName
holder.detailAge?.text = detail.detailAge
holder.tag?.text = detail.tag
holder.detailStar1?.setImageDrawable(holder.itemView.context.getDrawable(detail.detailStar1))
holder.detailStar2?.setImageDrawable(holder.itemView.context.getDrawable(detail.detailStar2))
holder.detailStar3?.setImageDrawable(holder.itemView.context.getDrawable(detail.detailStar3))
holder.detailStar4?.setImageDrawable(holder.itemView.context.getDrawable(detail.detailStar4))
holder.detailStar5?.setImageDrawable(holder.itemView.context.getDrawable(detail.detailStar5))
holder.detailReviews?.text = detail.detailReviews
holder.detailStory?.text = detail.story.toString()
holder.actor1?.setImageDrawable(holder.itemView.context.getDrawable(detail.actor1))
holder.actor2?.setImageDrawable(holder.itemView.context.getDrawable(detail.actor2))
holder.actor3?.setImageDrawable(holder.itemView.context.getDrawable(detail.actor3))
holder.actor4?.setImageDrawable(holder.itemView.context.getDrawable(detail.actor4))
holder.nameActor1?.text = detail.nameActor1
holder.nameActor2?.text = detail.nameActor2
holder.nameActor3?.text = detail.nameActor3
holder.nameActor4?.text = detail.nameActor4
fun bindActorsDetail(newDetail: List<MovieDetail>)
listDetail = newDetail
notifyDataSetChanged()
override fun getItemCount(): Int = listDetail.size
class ViewHolder(view: View): RecyclerView.ViewHolder(view)
val imageDetail: ImageView? = itemView.findViewById(R.id.imageDetail)
val detailName: TextView? = itemView.findViewById(R.id.detailName)
val detailAge: TextView? = itemView.findViewById(R.id.yearsDetail)
val tag: TextView? = itemView.findViewById(R.id.tag)
val detailStar1: ImageView? = itemView.findViewById(R.id.detailStar1)
val detailStar2: ImageView? = itemView.findViewById(R.id.detailStar2)
val detailStar3: ImageView? = itemView.findViewById(R.id.detailStar3)
val detailStar4: ImageView? = itemView.findViewById(R.id.detailStar4)
val detailStar5: ImageView? = itemView.findViewById(R.id.detailStar5)
val detailReviews: TextView? = itemView.findViewById(R.id.detailReviews)
val detailStory: TextView? = itemView.findViewById(R.id.detailStory)
val actor1: ImageView? = itemView.findViewById(R.id.ivDetail1)
val actor2: ImageView? = itemView.findViewById(R.id.ivDetail2)
val actor3: ImageView? = itemView.findViewById(R.id.ivDetail3)
val actor4: ImageView? = itemView.findViewById(R.id.ivDetail4)
val nameActor1: TextView? = itemView.findViewById(R.id.tvDetail1)
val nameActor2: TextView? = itemView.findViewById(R.id.tvDetail2)
val nameActor3: TextView? = itemView.findViewById(R.id.tvDetail3)
val nameActor4: TextView? = itemView.findViewById(R.id.tvDetail4)
第一个片段
class FragmentMovieList : Fragment()
private var recycler: RecyclerView? = null
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View?
val view = inflater.inflate(R.layout.fragment_movie_list, container, false)
return view
override fun onViewCreated(view: View, savedInstanceState: Bundle?)
recycler = view.findViewById(R.id.rvActors)
recycler?.adapter = MovieListAdapter()
override fun onStart()
updateData()
super.onStart()
private fun updateData()
(recycler?.adapter as? MovieListAdapter)?.apply
bindActors(MovieData().getMovie())
SecondFragment
class FragmentMoviesDetails : Fragment()
private var recyclerDetail: RecyclerView? = null
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View?
return inflater.inflate(R.layout.fragment_movies_details, container, false)
override fun onViewCreated(view: View, savedInstanceState: Bundle?)
recyclerDetail = view.findViewById(R.id.rvDetail)
recyclerDetail?.adapter = MovieDetailAdapter()
override fun onStart()
updateData()
super.onStart()
private fun updateData()
(recyclerDetail?.adapter as? MovieDetailAdapter)?.apply
bindActorsDetail(DetailData().getDetail())
我对第一个适配器和第二个适配器使用带有一些数据的列表。
我做了一些操作，以便当我单击第一个片段中的图标时，我会转到第二个片段，但什么都不会出现。
没有recyclerview.adapter 片段之间的转换发生
【问题讨论】：
【参考方案1】：我也实现了同样的事情，即使用导航组件从带有回收器视图的片段中打开另一个片段。我可以分享我的代码，以便您获得一些参考。所以这是我的代码...
适配器
class TheoryAdapter(private var mlistner : onItemClickListener): RecyclerView.Adapter<TheoryAdapter.ViewHolder>()
interface onItemClickListener
fun onItemClick(position: Int)
//my code (create & bind view holder)
inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView),View.OnClickListener
//my code
init
itemView.setOnClickListener(this)
override fun onClick(v: View?)
val position = bindingAdapterPosition
if (position!=RecyclerView.NO_POSITION)
if (v != null)
mlistner.onItemClick(position)
片段
class TheoryFragment : Fragment(R.layout.fragment_theory),TheoryAdapter.onItemClickListener
//my code (onCreateView)
override fun onItemClick(position: Int)
val pos = position
val action = TheoryFragmentDirections.actionTheoryFragmentToTextDisplayFragment(pos)
findNavController().navigate(action)
导航图
<?xml version="1.0" encoding="utf-8"?>
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/nav_graph.xml"
app:startDestination="@id/mainFragment">
<fragment
android:id="@+id/theoryFragment"
android:name="com.example.learnjava.fragment.TheoryFragment"
android:label="fragment_theory"
tools:layout="@layout/fragment_theory" >
<action
android:id="@+id/action_theoryFragment_to_textDisplayFragment"
app:destination="@id/textDisplayFragment" />
</fragment>
</navigation>
【讨论】：
抱歉，我不知道你在哪里得到了 TheoryFragmentDirections.actionTheoryFragmentToTextDisplayFragment 或 bindingAdapterPosition 之类的方法，以及你如何使用这个方法 onClick TheoryFragmentDirections.actionTheoryFragmentToTextDisplayFragment ，这是从主片段转到其他片段，我建议你在导航组件上观看视频，它确实是一种在片段之间切换的简单方法。而onClick方法来自于适配器。以上是关于我无法从另一个带有 recyclerview.adaper 的片段中打开带有 recyclerview.adapter 的片段的主要内容，如果未能解决你的问题，请参考以下文章