Android RecyclerView使用GridLayoutManager致使间隙变大的问题

我用recyclerView的时候设置LayoutManager为Grid，添加decoration为Grid，做为二级列表时，屡次点击一级列表来跳转的时候，两张图之间的间隙在逐渐变大，后来发现是由于屡次初始化Adaper的缘故。 

mWaresAdapter = new WaresAdapter(getContext(), datas); mRecyclerViewWares.setAdapter(mWaresAdapter); mRecyclerViewWares.setLayoutManager(new GridLayoutManager(getContext(), 2)); mRecyclerViewWares.addItemDecoration(new DividerGridItemDecoration(getContext()));

这是有bug的代码，每次都建立adapter致使间隙变大

解决办法

if(mWaresAdapter == null) { 　　mWaresAdapter = new WaresAdapter(getContext(), datas); 　　mRecyclerViewWares.setAdapter(mWaresAdapter) 　　mRecyclerViewWares.setLayoutManager(new GridLayoutManager(getContext(), 2)); 　　mRecyclerViewWares.addItemDecoration(new DividerGridItemDecoration(getContext())); }else{ mWaresAdapter.clearData(); mWaresAdapter.addData(datas); }