第一次尝试用BaseRecyclerViewAdapterHelper实现上拉刷新、加载更多、添加头布局、尾布局等等功能

BaseRecyclerViewAdapterHelper 简介：

• 减少重复 Adapter 代码

• 添加 Item 的点击事件，长按事件以及子控件的点击事件

• 添加头部、尾部，下拉刷新、上拉加载（上拉加载的5种加载更多动画任你选择，后期会添加更多的加载动画）、没有更多数据

• 可以自定义头部、尾部、加载更多布局

• 添加 Item滑动动画 （9种动画切换，轻松一行代码）

• 添加新增、删除 Item动画 （目前支持默认的动画方式）

• 网格，列表，流式随意切换

• 添加空布局（列表无数据时，显示更加人性化）

• 拖拽和侧滑删除

• 支持多类型布局

• 类似淘宝列表切换

• 字母导航

• 类似探探翻牌

框架引入：

allprojects {
    repositories {
        jcenter()
        maven { url "https://jitpack.io" }
        google()
    }
} 
导入依赖：

compile 'com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.18'

自己创建adapter类

public class TestAdapter extends BaseQuickAdapter<CouponListBean.Data, BaseViewHolder> implements View.OnClickListener {

    private List<CouponListBean.Data> couponList;
    private Context context;

    public TestAdapter(int layoutResId) {
        super(layoutResId);
    }


    @Override
    protected void convert(BaseViewHolder helper, CouponListBean.Data item) {
        helper.setText(R.id.tv_coupon_money, "￥" + item.getCouponSaleMoney() + "");
        helper.setText(R.id.tv_coupon_name, "￥" + item.getCouponName());
        helper.setText(R.id.tv_site_title, "￥" + item.getSite_title())
                .setOnClickListener(R.id.tv_site_title, this::onClick);
        helper.setText(R.id.tv_page_count, "￥" + item.getCouponCount() + "张");
        Log.e("convert", item.getSite_title());

    }

    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.tv_site_title:
               
                break;
        }
    }
}

有木有很简单，代码量是不是也少了很多。接下来看Activity的实现，还是先上代码：

public class TestActivity extends BaseActivity {
    private TabLayout tabLayout;
    private RecyclerView recyclerView;
    private TextView textView, tv, tvTranslationContent;
    private Button btnFanyi;
    private EditText editText;
    private int CurrentIndex = 1;
    private int PageSize = 10;
    private String Channel_one = "0";
    private ChannelDataBean bean;
    private SwipeRefreshLayout refreshLayout;
    private TestAdapter couponListAdapter;
    private List<CouponListBean.Data> dataList = new ArrayList<>();
    private boolean slideToBottom;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_demo);
        initView();
        getChannelList();
        initListener();

    }

    private void initListener() {
        
        tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                if (tab.getPosition() == 0) {
                    CurrentIndex = 1;
                    Channel_one = "0";
                } else {
                    CurrentIndex = 1;
                    Channel_one = bean.getData().get(tab.getPosition()).getID();
                }
                refreshLayout.setRefreshing(true);
                getCouponList(0);

            }

            @Override
            public void onTabUnselected(TabLayout.Tab tab) {

            }

            @Override
            public void onTabReselected(TabLayout.Tab tab) {

            }
        });

        refreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                refreshLayout.setRefreshing(true);
                CurrentIndex = 1;
                getCouponList(1);
            }
        });


        couponListAdapter.setOnLoadMoreListener(new BaseQuickAdapter.RequestLoadMoreListener() {
            @Override
            public void onLoadMoreRequested() {
                CurrentIndex += 1;
                getCouponList(2);
            }
        });
    }

    private void initView() {
        tabLayout = (TabLayout) findViewById(R.id.tabLayout);
        recyclerView = (RecyclerView) findViewById(R.id.recycleView);
        textView = (TextView) findViewById(R.id.tv);
        btnFanyi = (Button) findViewById(R.id.fanyi);
        tv = (TextView) findViewById(R.id.request1);
        editText = (EditText) findViewById(R.id.editText);
        tvTranslationContent = (TextView) findViewById(R.id.tv_translation_content);
        refreshLayout = findViewById(R.id.refresh);
        couponListAdapter = new TestAdapter(R.layout.recycler_item_coupon);
        recyclerView.setAdapter(couponListAdapter);
//        recyclerView.setLayoutManager(new WrapContentLinearLayoutManager(DemoActivity.this, WrapContentLinearLayoutManager.VERTICAL, false));
        recyclerView.setLayoutManager(new WrapContentLinearLayoutManager(TestActivity.this));
        addHeadView();
    }

    /**
     * 获取分类
     */
    private void getChannelList() {
        new HttpBuilder(Constant.MallHandler_url)
//                    .path(getExternalFilesDir(null) + File.separator + "Photoshop_CS6.exe")
//                    .params("key", "转换(map)")
                .params("op", "GetChannelList")
                .params("user_Group_ID", "337")
                .params("parentid", "0")
                .progress(p -> {
                })
                .success(s -> {
                    //返回path
                    try {
                        bean = new Gson().fromJson(s, ChannelDataBean.class);
                        if (bean.getErrorCode().equals("200")) {
                            ChannelDataBean.DataBean channelDataBean = new ChannelDataBean.DataBean();
                            channelDataBean.setID("0");
                            channelDataBean.setChannel_Name("全部");
                            bean.getData().set(0, channelDataBean);
                            for (int i = 0; i < bean.getData().size(); i++) {
                                tabLayout.addTab(tabLayout.newTab().setText(bean.getData().get(i).getChannel_Name()));
                            }
                        }
                        Log.e("success===>s  ", "" + bean.getData().size());
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                })
                .error(t -> {
                    Log.e("error==>", t + "");
                })
                .post();
    }

    /**
     * 0 第一次进入
     * 1 刷新
     * 2 加载更多
     */
    private void getCouponList(int state) {
        new HttpBuilder(Constant.MallOrderHandler_url)
                .params("OP", "GetCouponList")
                .params("user_Group_ID", "337")
                .params("Account_ID", "8798")
                .params("Channel_one", "" + Channel_one)
                .params("Channel_two", "")
                .params("CurrentIndex", "" + CurrentIndex)
                .params("PageSize", "" + PageSize)
                .params("version", "2.32")
                .params("lang", "" + (getResources().getConfiguration().locale.getCountry().equals("CN") ? "zh" : "en"))
                .params("APPType", "android")
                .params("PlantType", "0")
                .success(s -> {
                    refreshLayout.setRefreshing(false);
                    CouponListBean couponList = new Gson().fromJson(s, CouponListBean.class);
                    Log.e("onSuccess==>", s);
                    if (couponList.getErrorCode().equals("200")) {
                        if (state == 0) {
                            dataList = couponList.getData();
                            couponListAdapter.setNewData(dataList);
                        } else if (state == 1) {
                            dataList = couponList.getData();
                            couponListAdapter.setNewData(dataList);
                        } else if (state == 2) {
                            if (CurrentIndex == 1) {
                                dataList.clear();
                            }
                            dataList.addAll(couponList.getData());
                            couponListAdapter.setNewData(dataList);
                            couponListAdapter.loadMoreComplete();
                            couponListAdapter.notifyDataSetChanged();
                            Log.e("convert", couponList.getData().size() + " ");
                        }
                    } else if (couponList.getErrorCode().equals("404")) {
                        if (CurrentIndex == 1) {
                            recyclerView.removeAllViews();
                            dataList.clear();
                            couponListAdapter.notifyDataSetChanged();
//                            couponListAdapter.setEmptyView(R.layout.activity_jcvideoplayer, recyclerView);//添加空布局
                        } else {
                            couponListAdapter.loadMoreEnd();
                        }

                    }
                })
                .error(e -> {
                    refreshLayout.setRefreshing(false);
                    Log.e("error==>", e + "");
                })
                .post();
    }


    /**
     * 添加headView 或footerView
     */
    private void addHeadView() {
        View headView = getLayoutInflater().inflate(R.layout.item_foot, null);
        headView.setLayoutParams(new DrawerLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
        //headView添加监听
        headView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(TestActivity.this, "click HeadView", Toast.LENGTH_LONG).show();
            }
        });
//        couponListAdapter.addHeaderView(headView);
        couponListAdapter.addFooterView(headView);
    }

   

    }

注释已经很清楚了，相信大家都能看的懂，在这就不多做解释了。如果遇到以下问题：

Android之RecyclerView的原生Bug-Inconsistency detected. Invalid view holder adapter positionViewHolder{a1bbfa3 position=2 id=-1, oldPos=-1, pLpos:-1 no parent}，recyclerviewholder

以及：

java.lang.IllegalArgumentException: Called attach on a child which is not detached: ViewHolder{ec75dcb position=18 id=-1, oldPos=-1, pLpos:-1 not recyclable(1)} android.support.v7.widget.RecyclerView{b3515af VFED..... ......ID 0,0-1080,1230 #7f0900ec app:id/recycleView}, adapter:com.xgh.app.demo2.CouponListAdapterdemo@68fbdbc, layout:com.xgh.app.demo2.WrapContentLinearLayoutManager@26b4145, context:com.xgh.app.demo2.DemoActivity@6973c1d

请参考：https://blog.youkuaiyun.com/xiaoshuxgh/article/details/80225516