Kotlin - onclicklistener for recyclerview to a "details

Question

我正在尝试在单击回收器视图项目时显示另一个片段。我已经添加了一个onclicklistener，现在fragment.kt上有一个待办事项部分，我需要知道如何让它导航到一个新的片段

至于代码，这里是适配器：

class dormAdapter(
private val dorms: List<Dorms>,
private val listener: RecyclerViewClickListener
) : RecyclerView.Adapter<dormAdapter.DormViewHolder>() {
override fun getItemCount() = dorms.size
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) =
DormViewHolder(
DataBindingUtil.inflate(
LayoutInflater.from(parent.context),
R.layout.layout_home,
parent, false
)
)
override fun onBindViewHolder(holder: DormViewHolder, position: Int) {
holder.recyclerviewDormBinding.dorm = dorms[position]
holder.recyclerviewDormBinding.buttonReserve.setOnClickListener {
listener.onRecyclerViewItemClick(holder.recyclerviewDormBinding.buttonReserve, dorms[position])
}
holder.recyclerviewDormBinding.layoutBox.setOnClickListener {
listener.onRecyclerViewItemClick(holder.recyclerviewDormBinding.layoutBox, dorms[position])
}
}
inner class DormViewHolder(
val recyclerviewDormBinding: LayoutHomeBinding
) : RecyclerView.ViewHolder(recyclerviewDormBinding.root)
}

这是着陆页上的片段：

class HomeFragment : Fragment(), RecyclerViewClickListener {
private lateinit var factory: HomeViewModelFactory
private lateinit var viewModel: HomeViewModel
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
return inflater.inflate(R.layout.fragment_home, container, false)
}
override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)
val api = DormsAPI()
val repository = DormRepository(api)
factory = HomeViewModelFactory(repository)
viewModel = ViewModelProviders.of(this, factory).get(HomeViewModel::class.java)
viewModel.getDorms()
viewModel.dorms.observe(viewLifecycleOwner, Observer { dorms ->
recyclerViewDorms.also{
it.layoutManager = LinearLayoutManager(requireContext())
it.setHasFixedSize(true)
it.adapter = dormAdapter(dorms, this)
}
})
}
override fun onRecyclerViewItemClick(view: View, dorms: Dorms) {
when(view.id){
R.id.button_reserve -> {
**// TODO: Go to new account if not signed up, etc...**
Toast.makeText(requireContext(), "Reserve button clicked", Toast.LENGTH_LONG).show()
}
R.id.layoutBox -> {
**// TODO: Go to Dorm Details**
Toast.makeText(requireContext(), "Go to dorm details", Toast.LENGTH_LONG).show()
}
}
}
}

这个问题需要的任何其他内容将在以后跟进。

巨大的编辑：现在添加了Onclicklistener。项目现在适用于 MVVM 体系结构。

Answer 1

1( 在适配器类中声明 mOnclicklistener 属性

private val mOnClickListener: View.OnClickListener
init {
mOnClickListener = View.OnClickListener { v ->
Log.d("onclick of item")
}
}

2( 在 onBindViewHolder 函数集中单击侦听器

with(holder.mView) {
setOnClickListener(mOnClickListener)
}