如何在RecylerView适配器中用位图大小缩放图像

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private List<Integer> imageList; // 图像资源列表

    public MyAdapter(List<Integer> imageList) {
        this.imageList = imageList;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_layout, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        int imageRes = imageList.get(position);

        // 加载原始位图
        Bitmap originalBitmap = BitmapFactory.decodeResource(holder.itemView.getContext().getResources(), imageRes);

        // 获取设备屏幕尺寸
        DisplayMetrics displayMetrics = holder.itemView.getContext().getResources().getDisplayMetrics();
        int targetWidth = displayMetrics.widthPixels / 2; // 设置目标宽度为屏幕宽度的一半
        int targetHeight = targetWidth * originalBitmap.getHeight() / originalBitmap.getWidth(); // 根据原始位图的宽高比例计算目标高度

        // 缩放位图
        Bitmap scaledBitmap = Bitmap.createScaledBitmap(originalBitmap, targetWidth, targetHeight, false);

        // 设置缩放后的位图给ImageView
        holder.imageView.setImageBitmap(scaledBitmap);
    }

    @Override
    public int getItemCount() {
        return imageList.size();
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        ImageView imageView;

        public ViewHolder(View itemView) {
            super(itemView);
            imageView = itemView.findViewById(R.id.image_view);
        }
    }
}