4.2.5 Android 下拉刷新的几个方法：SwipeRefreshLayout，android-Ultra-Pull-To-Refresh（ptr），PullToRefreshListView

1: SwipeRefreshLayout

2: android-Ultra-Pull-To-Refresh（ptr），

3: PullToRefreshListView

SwipeRefreshLayout swipeRefreshLayout =(SwipeRefreshLayout)findViewById(R.id.main_swipeRefreshLayout);
// swipeRefreshLayout.setRefreshing(true);  swipeRefreshLayout.setColorSchemeColors(Color.RED,Color.BLUE,Color.YELLOW);
        swipeRefreshLayout.setSize(SwipeRefreshLayout.LARGE);
        swipeRefreshLayout.setOnRefreshListener(this);

下拉刷新的大小，只有两种模式，一个是小的，一个是大的。

swipe.setSize(SwipeRefresh.LARGE);
还可以设置一组颜色
swipe.setColorSchemeColors(Color.RED,Color.YELLOW,Color.BLUE);
swipe.setOnRefreshListener();

public ovid onRefresh(){
HttpUtils.getService().getArticle.....
就是刷新第一页。
}

/**  * A simple {@link Fragment} subclass.  */ public class LeiBieFragment extends Fragment implements Callback<LeiBieEntity>, SwipeRefreshLayout.OnRefreshListener {
    private RecyclerView recyclerView;
    private LeiBieAdapter adapter;
    private SwipeRefreshLayout mSwipeRefreshLayout;
    public LeiBieFragment() {
        // Required empty public constructor  }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment  View ret = inflater.from(getContext()).inflate(R.layout.fragment_lei_bie, container, false);
// return inflater.inflate(R.layout.fragment_lei_bie, container, false);  mSwipeRefreshLayout =(SwipeRefreshLayout)ret.findViewById(R.id.leibie_swiperefreshlayout);
        recyclerView = (RecyclerView)ret.findViewById(R.id.leibie_recyclerview);
        adapter = new LeiBieAdapter(ret.getContext(),new ArrayList<LeiBieEntity.DataEntity.ReturnDataEntity.RankinglistEntity>());
        recyclerView.setAdapter(adapter);

//SwipeRefreshLayout-----------
        mSwipeRefreshLayout.setOnRefreshListener(this);
        mSwipeRefreshLayout.setColorSchemeColors(Color.RED, Color.BLUE, Color.CYAN);
        mSwipeRefreshLayout.setSize(SwipeRefreshLayout.LARGE);

//SwipeRefreshLayout-----------
        HttpUtils.getLeiBieService().getLeiBie(1446).enqueue(this);        return ret;    }    //DataEntity.ReturnDataEntity.RankinglistEntity @Override    public void onResponse(Call<LeiBieEntity> call, Response<LeiBieEntity> response) {        adapter.addAll(response.body().getData().getReturnData().getRankinglist());        mSwipeRefreshLayout.setRefreshing(false);    }    @Override    public void onFailure(Call<LeiBieEntity> call, Throwable t) {        mSwipeRefreshLayout.setRefreshing(false);    }    @Override    public void onRefresh() {        HttpUtils.getLeiBieService().getLeiBie(1446).enqueue(this);    }}

无论成功还是失败，都要把求收回来。
swipe.setRefreshing(false);

刷新之前一定要清空数据，并加载第一页
添加一个变量，page。
page=1；
然后

在adapter 里面添加listClean

public void clean(){
list.clean();
notify
}

在onResponse里面
page 还可以用来判断是下拉刷新和上拉加载。
if(page==1){
adapter.clear();
}