Android RecyclerView使用GridLayoutManager致使間隙變大的問題

我用recyclerView的時候設置LayoutManager爲Grid，添加decoration爲Grid，做爲二級列表時，屢次點擊一級列表來跳轉的時候，兩張圖之間的間隙在逐漸變大，後來發現是由於屢次初始化Adaper的緣故。 

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

這是有bug的代碼，每次都建立adapter致使間隙變大

解決辦法

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); }