在嵌套的 recyclerview 情况下，没有在父 recyclerview 的项目上获得点击事件。 如何获得两个recyclerviews？

Question

This is the ui design

Parent RecyclerView-> cardview items-> Child RecyclerView-> custom layout items  

Requirement is that there has to be single selection in this nested recyclerview situation.I am able to get the position of the selected child inside the nested recyclerview but I also want to know the position of the parent recyclerview child inside which nested recyclerview is present. Looks like parent recyclerview is passing down the click events to the children of its nested recyclerview. Please suggest how can I achieve this. Thanks.

Answer 1

You will have to manually bubble up an event, the child in the child recycler view gets the onClickListener, it attaches some information, passes it up to its parent (child recyclerview), and then child recyclerview can attach itself and pass it to the main parent.

The main Parent has to pass in a callback, and the same needs to be done by the child recyclerView.

The code may look something like this:

    class MainParent {
        val list = mutableListOf<ChildParent>()
        private val mainParentCallbackImpl = object : MainParentCallback {
            override fun childParentPressed(childParent: ChildParent) {
                //do whatever you need to do
            }
        }
        init {
            list.add(ChildParent(mainParentCallbackImpl))
        }

        interface MainParentCallback {
            fun childParentPressed(childParent: ChildParent)
        }
    }
    
    class ChildParent(private val parentCallback: MainParent.MainParentCallback) {
        val list = mutableListOf<Child>()
        private val childParentCallbackImpl = object : ChildParentCallback {
            override fun childPressed(child: Child) {
                //do whatever you need to do first
                parentCallback.childParentPressed(this@ChildParent)
            }
        }

        init {
            list.add(Child(childParentCallbackImpl))
        }

        interface ChildParentCallback {
            fun childPressed(child: Child)
        }
    }

    class Child(private val childParentCallback: ChildParent.ChildParentCallback) :
        View.OnClickListener {
        override fun onClick(v: View?) {
            //do whatever you need to do first
            childParentCallback.childPressed(this)
        }
    }