如何在 Recycler View GridLayout 中更改跨度大小期间显示进度条？

Question

我正在使用RecyclerView 和GridLayout 来展示产品。我有一个按钮，单击时会更改跨度大小。我使用gridLayoutManager.setSpanSizeLookup 来动态更改跨度大小。一切正常，但是当我单击按钮时，需要一些时间来更改跨度大小。我想在这个过程中显示一个进度条。我该怎么做？

 public void onGridViewClick() {
        if (isGridViewEnabled){
            gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
                @Override
                public int getSpanSize(int position) {
                    switch (adapter.getItemAtPosition(position).getType()) {
                        case BaseGoodkartSearchResultModel.SEARCH_ITEM: return 2;
                        case BaseGoodkartSearchResultModel.SWAN_ITEM:  return 2;
                        case BaseGoodkartSearchResultModel.OFFER_EXPIRED: return 2;
                    }
                    return 1;
                }
            });
            isGridViewEnabled=false;

        }else {
            gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
                @Override
                public int getSpanSize(int position) {
                    switch (adapter.getItemAtPosition(position).getType()) {
                        case BaseGoodkartSearchResultModel.SEARCH_ITEM: return 1;
                        case BaseGoodkartSearchResultModel.SWAN_ITEM:  return 2;
                        case BaseGoodkartSearchResultModel.OFFER_EXPIRED: return 2;
                    }
                    return 1;
                }
            });
            isGridViewEnabled=true;
        }
        
    }

Answer 1

当用户单击网格视图并在视图加载后关闭时，只需在其中显示一个带有进度条的警报对话框（默认进度条，如圆圈）。

        AlertDialog alertDialog;  
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setCancelable(false);
        builder.setView(R.layout.progresslayout);// This Layout just contain a simple progress bar
        alertDialog = builder.create();
        alertDialog.show();
        alertDialog.dismiss();// to dismiss when layout loaded