android的recyView设置item先是不同的高度，类似瀑布流

解决方案是:在adapter里获取了item的高度做了一个数值范围内(设置高度的下限和高度的上限,这里设置的高度是最低值加上一个范围内的随机数的值)，这样就ok了，这里的适配器集成了万能的适配器BRVAH

public class BRVAHImgAdapter extends BaseQuickAdapter<ImgEntryResponse, BaseViewHolder> {

    private final static String IMG_URL = CommonServerUrl.IMG_SERVER_URL;//最新地址
    List<ImgEntryResponse> mBRVAHImgObjList;

    //构造
    public BRVAHImgAdapter(int layoutResId, List<ImgEntryResponse> data) {
        super(layoutResId, data);
    }

    @Override
    protected void convert(@NonNull BaseViewHolder helper, ImgEntryResponse item) {
        //helper.setText(R.id.id_text, "第" + helper.getAdapterPosition() + "个数据");

        ImageView img_view = helper.getView(R.id.iv_indexImg_brvah);

        String url = IMG_URL + item.getPT();
        Glide.with(mContext).load(url)
                .placeholder(R.drawable.prestrain_icon)//加载占位图/图片未加载，提前展示给用户
//                .skipMemoryCache(true)
//                .diskCacheStrategy(DiskCacheStrategy.NONE)
                .fitCenter()
                .listener(new RequestListener<Drawable>() {
                    @Override
                    public boolean onLoadFailed(@Nullable GlideException e, Object model, Target<Drawable> target, boolean isFirstResource) {
                        Log.d("Wain", "BRVAH成功le加载失败 errorMsg:" + (e != null ? e.getMessage() : "null"));
                        return false;
                    }

                    @Override
                    public boolean onResourceReady(Drawable resource, Object model, Target<Drawable> target, DataSource dataSource, boolean isFirstResource) {
                        Log.d("BRVAH成功le", "BRVAH成功le  Drawable Name:" + resource.getClass().getCanonicalName());
                        return false;
                    }
                }).into(img_view);
        // helper.setText(R.id.tv_imgName, item.getD());
        int position = helper.getLayoutPosition();
        Log.d("当前条目的位置++", position + "");
        //获取item宽度，计算图片等比例缩放后的高度，为imageView设置参数
        ViewGroup.LayoutParams params = img_view.getLayoutParams();
        WindowManager wm= (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
        int width = wm.getDefaultDisplay().getWidth();
        //设置图片的相对于屏幕的宽高比
        params.width = width / 2;
        params.height = (int) (260 + Math.random() * 330);//设置随机高度
        img_view.setLayoutParams(params);
    }

}