How do I make WRAP_CONTENT work on a RecyclerView

Question

I have a DialogFragment that contains a RecyclerView (a list of cards).

Within this RecyclerView are one or more CardVi

Answer 1

Try this (It's a nasty solution but It may work): In the onCreate method of your Activity or in the onViewCreated method of your fragment. Set a callback ready to be triggered when the RecyclerView first render, like this:

vRecyclerView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                calculeRecyclerViewFullHeight();
            }
        });

In the calculeRecyclerViewFullHeight calculate the RecyclerView full height based in the height of its children.

protected void calculateSwipeRefreshFullHeight() {
        int height = 0;
        for (int idx = 0; idx < getRecyclerView().getChildCount(); idx++ ) {
            View v = getRecyclerView().getChildAt(idx);
            height += v.getHeight();
        }
        SwipeRefreshLayout.LayoutParams params = getSwipeRefresh().getLayoutParams();
        params.height = height;
        getSwipeRefresh().setLayoutParams(params);
    }

In my case my RecyclerView is contain in a SwipeRefreshLayout for that reason I'm setting the height to the SwipeRefreshView and not to the RecyclerView but if you don't have any SwipeRefreshView then you can set the height to the RecyclerView instead.

Let me know if this helped you or not.