//线性布局
case R.id.xx:
rlview.setLayoutManager(new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false));
break;
//网格布局
case R.id.wg:
rlview.setLayoutManager(new GridLayoutManager(this,3));
break;
//流式布局
case R.id.ls:
rlview.setLayoutManager(new StaggeredGridLayoutManager(4,StaggeredGridLayoutManager.VERTICAL));
break;
case R.id.add:
list.add("富贵有命生死在天"+list.size());
adapter.notifyDataSetChanged();
break;
case R.id.rm:
list.remove(list.size()-1);
adapter.notifyDataSetChanged();
break;