android - 如何使用列表将图标更改为网格

Question

我正在使用 StaggeredGridlayoutmanager 将列表更改为网格并将网格更改为列表，但我想在更改视图时更改图标，例如如果视图处于列表模式我想显示网格图标并且视图处于网格模式我想显示列表模式

 case R.id.product_grid:

                isViewWithCatalog = !isViewWithCatalog;
                supportInvalidateOptionsMenu();

                rv.setLayoutManager(isViewWithCatalog ? new LinearLayoutManager(this) : new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL));
                rv.setAdapter(rvAdapter);
                break;

我的适配器

  @Override
        public  RecyclerViewHolders onCreateViewHolder(ViewGroup parent, int viewType) {

            View layoutView = LayoutInflater.from(parent.getContext()).inflate(isViewWithCatalog ? R.layout.productlistview : R.layout.productgrids, null);
            RecyclerViewHolders rcv = new RecyclerViewHolders(layoutView);
            return rcv;


        }

Answer 1

您可以维护一个布尔变量

case R.id.product_grid:
isGrid = true;
                isViewWithCatalog = !isViewWithCatalog;
                supportInvalidateOptionsMenu();

                rv.setLayoutManager(isViewWithCatalog ? new LinearLayoutManager(this) : new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL));
                rv.setAdapter(rvAdapter);
                break;

case R.id.product_list:
isGrid = false;
invalidateOptionMenu() or getActivity.invalidateOptionMenu() // If it is fragment

@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.menu_product, menu);
        MenuItem list = menu.findItem(R.id.list);
        MenuItem grid= menu.findItem(R.id.list);
        if(isGrid)
          grid.setVisible(true);
          list.setvisible(false)
        else
          list.setVisible(true);
          grid.setVisible(false);

        return super.onCreateOptionsMenu(menu);
    }