Recycler View Horizontal Scroll with 2 columns

Alright here is a funda,

When you are using GridLayoutManager.HORIZONTAL, second parameter will be considered as number of rows

while, when you write GridLayoutManager.VERTICAL second parameter will be considered as number of columns

Also, this

LinearLayoutManager layoutManager =
        new GridLayoutManager(getActivity(), 2, GridLayoutManager.HORIZONTAL, false);

supposed to be,

GridLayoutManager layoutManager =
            new GridLayoutManager(getActivity(), 2, GridLayoutManager.HORIZONTAL, false);

in above code, 2 is considered as number of rows to be generated.

To achieve what you need you need to combine two things: setup GridLayoutManager and set up adapter:

in Fragment/Activity:

 val snapHelper = PagerSnapHelper()
        snapHelper.attachToRecyclerView(recyclerView)

//Grid layout, 2 columns
        recyclerView.layoutManager =
            GridLayoutManager(this.context, 2, RecyclerView.HORIZONTAL, false)

and then in your adapter:

var displayMetrics = DisplayMetrics()
private var screenWidth = 0

in onCreateViewHolder:

(parent.context as MainActivity).windowManager.defaultDisplay.getMetrics(displayMetrics)
    screenWidth = displayMetrics.widthPixels

in onBindViewHolder:

    val itemPadding = 8

    //here you may change the divide amount from 2.5 to whatever you need 
    val itemWidth = (screenWidth - itemPadding).div(2.5)

    val layoutParams = holder.itemView.layoutParams
    layoutParams.height = layoutParams.height
    layoutParams.width = itemWidth.toInt()
    holder.itemView.layoutParams = layoutParams

Recently faced the same problem, ended with creating a custom GridLayoutManager that allowed me to fix the row count and column count together.

Link : -https://gist.github.com/KaveriKR/04bfef5ffc9c00a8b6fca503da497322

This custom layout manger makes use of the generateDefaultLayoutParams and two other functions to set different layout params for the layout manger.

try below code

RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(this, 2);
    recyclerView.setLayoutManager(mLayoutManager);

All answers at Java but if someone searches for Kotlin;

val layoutManager = GridLayoutManager(requireContext(),  2)

    recyclerViewSymbol.layoutManager = symbolLayoutManager

RecyclerView.LayoutManager mLayoutManager = new GridLayoutManager(activity,2,LinearLayoutManager.HORIZONTAL,false);
recyclerView.setLayoutManager(mLayoutManager);