切换listview和RecyclerView

先设置一个全局的private boolean b;button3.setOnClickListener(new View.OnClickListener() {    @Override    public void onClick(View v) {        //切换listview        if (b==false){            mRecyclerView.setLayoutManager(new LinearLayoutManager(Shop.this));            b=true;        }else {            mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL));            b=false;        }    }});