我用recyclerView的时候设置LayoutManager为Grid，添加decoration为Grid，作为二级列表时，多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，后来发现是因为多次初始化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，每次都创建adapter导致间隙变大

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); }