PullToRefresh实现ListView的刷新,加载更多的展示

public class Zi_Xun_Fragment extends Fragment {

    int page_num=1;

    private PullToRefreshListView pullToRefreshListView;

    List<DataDataBean.NewslistBean> list = new ArrayList<>();

    private MyAdapter adapter;

    private ILoadingLayout startLabels;

    @Nullable

    @Override

    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.zi_xun_frangment_layout, container, false);

        pullToRefreshListView = view.findViewById(R.id.refresh_list_view);

        return view;

        //

    }

    @Override

    public void onActivityCreated(@Nullable Bundle savedInstanceState) {

        super.onActivityCreated(savedInstanceState);

        /*设置pullToRefreshListView的刷新模式，BOTH代表支持上拉和下拉，PULL_FROM_END代表上拉,PULL_FROM_START代表下拉 */

        pullToRefreshListView.setMode(PullToRefreshBase.Mode.BOTH);

        startLabels = pullToRefreshListView.getLoadingLayoutProxy(true, false);

        startLabels.setPullLabel("下拉刷新");

        startLabels.setRefreshingLabel("正在拉");

        startLabels.setReleaseLabel("放开刷新");

        ILoadingLayout endLabels = pullToRefreshListView.getLoadingLayoutProxy(false, true);

        endLabels.setPullLabel("上拉刷新");

        endLabels.setRefreshingLabel("正在载入...");

        endLabels.setReleaseLabel("放开刷新...");

        getDataFromNet();

        pullToRefreshListView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {

            @Override

            public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {

                getRefreshData();

            }

            @Override

            public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {

                page_num++;

                getaboveData();

            }

        });

    }

    /**

     * 上拉加载更多

     */

    private void getaboveData() {

        String path = "https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10&page="+page_num;

        GetNetData.getData(getActivity(), path, new JsonStringDataNet() {

            @Override

            public void getJsonData(String json) {

                Gson gson = new Gson();

                DataDataBean dataDataBean = gson.fromJson(json, DataDataBean.class);

                list.addAll(dataDataBean.getNewslist());

                setAdapter();

                //停止刷新加载更多

                pullToRefreshListView.onRefreshComplete();

            }

        });

    }

    /**

     * 下拉刷新的方法

     */

    private void getRefreshData() {

        String path = "https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10&page=1";

        GetNetData.getData(getActivity(), path, new JsonStringDataNet() {

            @Override

            public void getJsonData(String json) {

                list.clear();

                adapter.notifyDataSetChanged();

                Gson gson = new Gson();

                DataDataBean dataDataBean = gson.fromJson(json, DataDataBean.class);

                list.addAll(0,dataDataBean.getNewslist());

                setAdapter();

                //停止刷新

                pullToRefreshListView.onRefreshComplete();

                //设置时间

                Date date= new Date(System.currentTimeMillis());

                SimpleDateFormat item = new SimpleDateFormat("HH:mm");

                startLabels.setLastUpdatedLabel(item.format(date));

            }

        });

    }

    //请求网络数据

    private void getDataFromNet() {

        String path = "https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10&page=1";

        GetNetData.getData(getActivity(), path, new JsonStringDataNet() {

            //重写的自定义接口中的方法

            @Override

            public void getJsonData(String json) {

            Gson gson = new Gson();

                DataDataBean dataDataBean = gson.fromJson(json, DataDataBean.class);

                list.addAll(dataDataBean.getNewslist());

                setAdapter();

            }

        });

    }

    private void setAdapter() {

        //设置适配器

        if (adapter==null) {

            adapter = new MyAdapter(getActivity(), list);

            pullToRefreshListView.setAdapter(adapter);

        }else{

            adapter.notifyDataSetChanged();

        }

    }

}