Pressed state for RecyclerView Item

Question

I'm using horizontal recyclerview as a custom bottom navigation bar. I want to define a pressed state for the each item so their color can change.

I tried to do it like this but couldn't manage it

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@color/menu_pressed" android:state_activated="true" />
    <item android:drawable="@color/menu_pressed" android:state_pressed="true" />
    <item android:drawable="@color/menu_pressed" android:state_checked="true" />
    <item android:drawable="@color/menu_pressed" android:state_focused="true" />
    <item android:drawable="@color/menu" />
</selector>

recycler view:

 <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view"
        android:layout_width="match_parent"
        android:layout_height="65dp"
        android:layout_gravity="bottom"
        android:background="@drawable/menu_selector"
        android:fadingEdge="vertical|horizontal"
        android:fadingEdgeLength="60dp"
        android:fillViewport="false"
        android:requiresFadingEdge="horizontal|vertical"
        app:layoutManager="android.support.v7.widget.LinearLayoutManager"
        android:clickable="true"
        android:focusable="true"
        android:focusableInTouchMode="true">

Answer 1

With a RecyclerView you cant define and set a single selector for every item like we could with ListView. It has to be done at the viewholder level.

So each item layout has to have a selector set as a background.

<FrameLayout
    android:id="@+id/frame"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:clickable="true"
    android:background="@drawable/menu_selector">

Then in your adapter onBind you can set a click listener and it should work

holder.frame.setOnClickListener {
  // do something
}