一. 依賴

implementation 'com.jwenfeng.pulltorefresh:library:1.0.3'

要把minSdkVersion 改為16以上

二.佈局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".fragment.UserFragment">

    <com.jwenfeng.library.pulltorefresh.PullToRefreshLayout
        android:id="@+id/pullToregresh"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/userRecyclerview"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />
    </com.jwenfeng.library.pulltorefresh.PullToRefreshLayout>

</LinearLayout>
 

在activity中

public class UserFragment extends Fragment implements IUserView {

        private PullToRefreshLayout pullToregresh;
        private RecyclerView userRecyclerview;
        private UserPresenter userPresenter;
        private int count=0;
        private ArrayList<UserBaen.DataBean> list = new ArrayList<>();

        @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_user, container, false);
        pullToregresh = view.findViewById(R.id.pullToregresh);
        userRecyclerview = view.findViewById(R.id.userRecyclerview);
        userPresenter = new UserPresenter(this);
        userPresenter.showUser(1);

        pullToregresh.setRefreshListener(new BaseRefreshListener() {
            @Override
            public void refresh() {
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        //清除
                        list.clear();
                        userPresenter.showUser(1);
                        pullToregresh.finishRefresh();
                    }
                },2000);
            }

            @Override
            public void loadMore() {
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        count++;
                        userPresenter.showUser(count);
                        pullToregresh.finishLoadMore();
                    }
                },2000);
            }
        });
        return view;
    }

    @Override
    public void Success(final List<UserBaen.DataBean> result) {
        getActivity().runOnUiThread(new Runnable() {
            @Override
            public void run() {
                //把所有的資料放在list中
                list.addAll(result);
                UserAdapter userAdapter = new UserAdapter(getContext(), list);
                LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext());
                linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
                userRecyclerview.setLayoutManager(linearLayoutManager);
                userRecyclerview.setAdapter(userAdapter);
            }
        });
    }

    @Override
    public void Failer(String msg) {
        getActivity().runOnUiThread(new Runnable() {
            @Override
            public void run() {
                Toast.makeText(getContext(), "失敗", Toast.LENGTH_SHORT).show();
            }
        });
    }
}