This gist will show you how to make staggeredgridlayout with images height fixed.

Adapter.java

@Override
    public void onBindViewHolder(ViewHolderDetail holder, int position) {
        DataModel item = items.get(position);
        if (item.getHeight() != 0 && item.getWidth() != 0) {
            float width = activity.getWindowManager().getDefaultDisplay().getWidth();
            float margin = ConvertionUtil.convertDpToPixel(8, activity);
            width = (width - (3 * margin)) / 2;
            float i = width / ((float) item.getWidth());
            float imageHeight = i * (item.getHeight());
            RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) holder.image.getLayoutParams();
            params.height = (int) imageHeight;
            params.width = (int) width;
            holder.image.setLayoutParams(params);
            Picasso.with(holder.image.getContext()).load(item.getImg()).into(holder.image);
            holder.itemView.setTag(item);
        } else {
            holder.image.setVisibility(View.GONE);
        }
        holder.text.setText(item.getMessage());
    }

ConvertionUtil.java

public static float convertDpToPixel(float dp, Context context) {
        Resources resources = context.getResources();
        DisplayMetrics metrics = resources.getDisplayMetrics();
        float px = dp * (metrics.densityDpi / 160f);
        return px;
    }