下拉刷新，上推加载（简单好用，终于会了）

​​https://github.com/scwang90/SmartRefreshLayout​​

1

implementation 'androidx.appcompat:appcompat:1.0.0'                 //必须 1.0.0 以上

implementation  'io.github.scwang90:refresh-layout-kernel:2.0.5'      //核心必须依赖
implementation  'io.github.scwang90:refresh-header-classics:2.0.5'    //经典刷新头
implementation  'io.github.scwang90:refresh-header-radar:2.0.5'       //雷达刷新头
implementation  'io.github.scwang90:refresh-header-falsify:2.0.5'     //虚拟刷新头
implementation  'io.github.scwang90:refresh-header-material:2.0.5'    //谷歌刷新头
implementation  'io.github.scwang90:refresh-header-two-level:2.0.5'   //二级刷新头
implementation  'io.github.scwang90:refresh-footer-ball:2.0.5'        //球脉冲加载
implementation  'io.github.scwang90:refresh-footer-classics:2.0.5'    //经典加载

2

<com.scwang.smart.refresh.layout.SmartRefreshLayout
        android:id="@+id/refresh_parent"
        android:visibility="visible"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <ListView
                android:visibility="visible"
                android:paddingLeft="13dp"
                android:paddingRight="13dp"
                android:paddingTop="17dp"
                android:id="@+id/ship_news_lv"
                android:divider="@drawable/window_divide_line"
                android:background="@color/white"
                android:layout_width="match_parent"
                android:layout_height="match_parent" />

            <TextView
                android:visibility="gone"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginBottom="@dimen/dp_10"
                android:textColor="@color/black_content"
                android:layout_gravity="center"
                android:layout_marginTop="@dimen/dp_10"
                android:text="@string/no_content"
                android:textSize="8sp" />
        </LinearLayout>

    </com.scwang.smart.refresh.layout.SmartRefreshLayout>

3

SmartRefreshLayout smartRefreshLayout;
    int i=1;

  @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        smartRefreshLayout = getActivity().findViewById(R.id.refresh_parent);
        //头部刷新样式
        if (smartRefreshLayout != null) {
            smartRefreshLayout.setRefreshHeader(new ClassicsHeader(getActivity()));
            smartRefreshLayout.setRefreshFooter(new ClassicsFooter(getActivity()));
            smartRefreshLayout.setOnRefreshListener(new OnRefreshListener() {
                @Override
                public void onRefresh(RefreshLayout refreshlayout) {
                    refreshlayout.finishRefresh(500/*,false*/);//传入false表示刷新失败
                    getData(1,12);
                }
            });

            smartRefreshLayout.setOnLoadMoreListener(new OnLoadMoreListener() {
                @Override
                public void onLoadMore(RefreshLayout refreshlayout) {
                    refreshlayout.finishLoadMore(500/*,false*/);//传入false表示加载失败
                    i++;
                    Log.e("wy", "onLoadMore i: "+i );
                    getData(i,12);
                }
            });
        }


    }

4 网络请求到数据的部分

ShipNewBean professionInfo = JSON.parseObject(result, ShipNewBean.class);
                    Log.e("wy", "onViewCreated onSuccess: " + professionInfo.getData().getRecords().size());
                    if (professionInfo.getCode().equals("00000000")) {
//                        List<ShipNewBean.DataDTO.RecordsDTO> records1 = professionInfo.getData().getRecords();
//                        recordsList1.addAll(records1);
                        List<ShipNewBean.DataDTO.RecordsDTO> records = professionInfo.getData().getRecords();
                        if(records.size()!=0){
                            shipNewsAdapter.addData(records);
                            shipNewsAdapter.notifyDataSetChanged();
                        }else {
                            smartRefreshLayout.finishLoadMore();
                            Toast.makeText(x.app(), R.string.no_more, Toast.LENGTH_SHORT).show();
                        }



//
                        shipNewsLv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                            @Override
                            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                                Intent intent = new Intent(getActivity(), ShipNewsActivity.class);
                                intent.putExtra("industryId", professionInfo.getData().getRecords().get(position).getIndustryId());
                                intent.putExtra("incrementId", professionInfo.getData().getRecords().get(position).getIncrementId());
                                intent.putExtra("incrementCode", 4);
                                Log.e("wy", "121 onItemClick professionInfo: " + professionInfo.getData().getRecords().get(position).getIncrementId());
                                intent.putExtra("homeType", "appIndustry");
//                            intent.putExtra("productId", professionInfo.getData().getRecords().get(position).getProductId());
                                startActivity(intent);

                            }
                        });

                    } else {
                        Toast.makeText(x.app(), professionInfo.getMsg(), Toast.LENGTH_SHORT).show();
                    }

5 ShipNewsAdapter 的正确姿势

public class ShipNewsAdapter extends BaseAdapter {
    List<ShipNewBean.DataDTO.RecordsDTO> datas=new ArrayList<>();
    Context context;

    public ShipNewsAdapter( Context context) {
        this.context = context;
    }
    public void addData(List<ShipNewBean.DataDTO.RecordsDTO> objects) {
//        data.clear();
        datas.addAll(objects);
    }


    @Override
    public int getCount() {

        return datas.size();
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        ViewHolder viewHolder;
        if (convertView == null) {
            viewHolder = new ViewHolder();
            convertView = LayoutInflater.from(context).inflate(R.layout.shipnews_lv_item, parent, false);

            viewHolder.incrementNameTv = (TextView) convertView.findViewById(R.id.incrementName_tv);
            viewHolder.releaseTimeTv = (TextView) convertView.findViewById(R.id.releaseTime_tv);

            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }
        viewHolder.incrementNameTv.setText(datas.get(position).getTitle());
        viewHolder.releaseTimeTv.setText(datas.get(position).getReleaseTime());

        return convertView;

    }

    private final class ViewHolder {
        private TextView incrementNameTv;
        private TextView releaseTimeTv;


    }
}