private RecyclerView recyclerView;
private RecyclerView.Adapter myAdapter;
private List<String > mDatas;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//1.初始化化数据源
initDatas();
recyclerView=(RecyclerView)findViewById(R.id.rv);
//2.添加布局
recyclerView.setLayoutManager(new LinearLayoutManager(this));
//3.添加适配器
myAdapter=new MyRVAdapter();
recyclerView.setAdapter(myAdapter);
//4.添加分割线,只有通过这种add方法才可以设置分割线
recyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL_LIST));
}