Fragment Onclick Listener

问题

I am using Bottom Navigation Activity in my project. Which contains following activities. I am using kotlin Language. I am not sure how to route from one fragment to another fragment in bottom navigation activity. Any help is appreciated.

Code:

https://github.com/joshvapeter/KotlinBottomNavigationNew

Activies

1)One Main Activity 
2)Two Fragments
3)Two Adapter Class
4)Two Layout files

Expectation

When I click the Fragment One Recycler View Item then It need to automatically route it to Fragment two Recycler View Item in the next bottom tab. Below is the code, I am using in my project.

Code

Fragment One Adapter

        itemView.setOnClickListener {

           Log.d("Fragment One Clicked","Fragment One Clicked")
            //FragmentTwo()

            }

MainActivity

fun ShowFragmentOne() {
    val transaction = manager.beginTransaction()
    val fragment = FragmentOne()
    transaction.replace(R.id.one, fragment)
    transaction.addToBackStack(null)
    transaction.commit()
    isFragmentOneLoaded = true
}

fun ShowFragmentTwo() {
    val transaction = manager.beginTransaction()
    val fragment = FragmentTwo()
    transaction.replace(R.id.two, fragment)
    transaction.addToBackStack(null)
    transaction.commit()
    isFragmentOneLoaded = false
}

回答1:

I don't have enough reputation to add a comment. So on the basis of my understanding, i am writing this answer. If my understanding is wrong, please comment.

From what i can understand you want to move to FragmentTwo when an item is clicked in RecyclerView in FragmentOne. You can achieve it in following way:

FragmentOne:

fun onItemSelected(item:MyModel){
    (activity as MainActivity).showFragmentTwo(item)
}

FragmentOneAdapter:

class FragmentOneAdapter(val fragment:FragmentOne,val myList:ArrayList<MyModel>):RecyclerView.Adapter<MyViewHolder>(){
override fun onCreateViewHolder(p0: ViewGroup, p1: Int): MyViewHolder {
    //your code to create view holder
}

override fun onBindViewHolder(p0: MyViewHolder, p1: Int) {
    p0.bindItem(myList[p1], fragment)
}

override fun getItemCount(): Int {
    return myList.size
}

class MyViewHolder(view:View):RecyclerView.ViewHolder(view){
    fun bindItem(item:MyModel,frag:FragmentOne)=with(itemView){
        setOnClickListener{
            frag.onItemSelected(item)
         }
      }
   }
} 

来源：https://stackoverflow.com/questions/53982139/fragment-onclick-listener