Fit recyclerview items on android screen

Question

I'm in trouble! I have this RecyclerView where I use a GridLayoutManager to achieve two columns and several rows. But here goes my issue: I have at most 8 items in this RecyclerView, and I would like to fit them according to screen size

So far I've got this:

using this piece of code:

        Rect rectangle = new Rect();
        Window window = ((Activity)context).getWindow();
        window.getDecorView().getWindowVisibleDisplayFrame(rectangle);
        int statusBarHeight = rectangle.top;
        int contentViewTop =
                window.findViewById(Window.ID_ANDROID_CONTENT).getTop();
        int titleBarHeight= contentViewTop - statusBarHeight;

        final TypedArray styledAttributes = getContext().getTheme().obtainStyledAttributes(
                new int[] { android.R.attr.actionBarSize });
        int mActionBarSize = (int) styledAttributes.getDimension(0, 0);
        styledAttributes.recycle();

        int softButtonsHeight = 0;

        DisplayMetrics metrics = new DisplayMetrics();
        ((Activity)context).getWindowManager().getDefaultDisplay().getMetrics(metrics);

        DisplayMetrics realMetrics = new DisplayMetrics();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            ((Activity)context).getWindowManager().getDefaultDisplay().getRealMetrics(realMetrics);

            if(realMetrics.heightPixels > metrics.heightPixels){
                softButtonsHeight = realMetrics.heightPixels - metrics.heightPixels;
            }
        }

        ImageView img_Logo = (ImageView)rootView.findViewById(R.id.img_logo_detalhe);

        float logoHeight = 0;
        //convertendo na mão tamanho do sponsor
        if(img_Logo.getVisibility() != GONE) {
            logoHeight = 100 * context.getResources().getDisplayMetrics().density;
        }

        double sizeInPx = (metrics.heightPixels - titleBarHeight - softButtonsHeight - mActionBarSize - logoHeight) / Math.round(list.size() / 2D);

        itensAdapter = new OptionItensAdapter(context, list, (int)sizeInPx);
        rvOptions.setAdapter(itensAdapter);

and inside OptionItensAdapter constructor at my onBindViewHolder:

RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, sizeInPx);
        holder.imageButton.setLayoutParams(params);

Do you have any idea that would make me achieve this? Thanks in advance.

Answer 1

Have a look at this OnBindViewHolder code and change it as per your requirement :D

 @Override
    public void onBindViewHolder(ViewHolder viewHolder, final int position) {

        final int pos = position;
        try {
//
            Resources r = activity.getResources();
            int px = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 150, r.getDisplayMetrics()); // i have bottom tabbar so yf you dont have any thing like this just leave 150 to 0.I think in your case height of image view an your top(Pifer)
            //this change height of rcv
            DisplayMetrics displaymetrics = new DisplayMetrics();
            activity.getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
            int height = displaymetrics.heightPixels;
            int width = displaymetrics.widthPixels;
            RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
            params.height = (height - px) / 5; //height recycleviewer (there are 5 rows so divide by 5 but i think in your case there are 4 rows so divide by 4)
            viewHolder.itemView.setLayoutParams(params);
            viewHolder.nameTxt.setText(totalList.get(position).getName());
            viewHolder.icon.setImageResource(totalList.get(position).getIcon());
//           viewHolder.background.setBackground(ContextCompat.getDrawable(context, totalList.get(position).getBackground()));
        } catch (Exception e) {
            e.printStackTrace();
        }


    }

Just posting this viewHolder to see what all items.

public static class ViewHolder extends RecyclerView.ViewHolder {

        public TextView nameTxt;
        public RelativeLayout background;
        public ImageView icon;

        public ViewHolder(View itemLayoutView) {
            super(itemLayoutView);

            nameTxt = (TextView) itemLayoutView.findViewById(R.id.menu_label);
            background = (RelativeLayout) itemLayoutView.findViewById(R.id.menu_background);
            icon = (ImageView) itemLayoutView.findViewById(R.id.menu_icon);
        }