View in RecyclerView does not match parent width

Question

I have a horizontal recyclerview:

Answer 1

RecyclerView is very crappy when it comes to properly positioning it and/or its child views. Try

@Override
public ViewHolder onCreateViewHolder(final ViewGroup parent, final int viewType) {
    final LayoutInflater inflater = LayoutInflater.from(parent.getContext());
    final View v = inflater.inflate(R.layout.item, parent, false);

    // match_parent won't work for RecyclerView (sigh)
    final ViewGroup.LayoutParams lp = v.getLayoutParams();
    lp.width = parent.getWidth();
    lp.height = parent.getHeight();
    v.setLayoutParams(lp);

    return new ViewHolder(v);
}

which basically replaces match_parent for both height & width within the child view. For your particular case you would only set the width then.

Answer 2

i think the problem is from

vg.getContext()

Let change to applicationContext or pass context to CustomAdapter