XRecyclerView实现下拉刷新和加载更多 + MVP + 排序 + 点击视图切换按钮

封装一个OkHttpUtil

 

public class OkHttpUtil {
    private OkHttpListener mOkHttpListener;
    private Handler mHandler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what){
                case 0://成功
                    String data = (String) msg.obj;
                    mOkHttpListener.OkHttpSuccess(data);
                    break;
                case 1://失败
                    String error = (String) msg.obj;
                    mOkHttpListener.OkHttpError(error);
                    break;
            }
        }
    };

    //生成    OkHttpListener  set方法
    public void setOkHttpListener(OkHttpListener okHttpListener) {
        mOkHttpListener = okHttpListener;
    }

    public OkHttpUtil OkHttpGet(String url){
        //获取clench对象
        OkHttpClient okHttpClient = new OkHttpClient();
        //获取Request对象
        Request request = new Request.Builder().url(url).build();
        okHttpClient.newCall(request).enqueue(new Callback() {

            /**
             * 失败回调方法
             * @param call
             * @param e
             */
            @Override
            public void onFailure(Call call, IOException e) {
                Message message = new Message();
                message.what = 1;
                message.obj = e.getMessage();
                mHandler.sendMessage(message);
            }

            /**
             * 成功回调方法
             * @param call
             * @param response
             * @throws IOException
             */
            @Override
            public void onResponse(Call call, Response response) throws IOException {
               Message message = new Message();
               message.what = 0;
               message.obj = response.body().string();
               mHandler.sendMessage(message);
            }
        });
        return this;
    }

    public OkHttpUtil OkHttoPost(String url, FormBody formBody){
        //创建 clench 对象
        OkHttpClient okHttpClient = new OkHttpClient();
        //获取Request
        Request request = new Request.Builder().url(url).post(formBody).build();
        okHttpClient.newCall(request).enqueue(new Callback() {
            /**
             * 失败回调方法
             * @param call
             * @param e
             */
            @Override
            public void onFailure(Call call, IOException e) {
                Message message = new Message();
                message.what = 1;
                message.obj = e.getMessage();
                mHandler.sendMessage(message);
            }

            /**
             * 成功回调方法
             * @param call
             * @param response
             * @throws IOException
             */
            @Override
            public void onResponse(Call call, Response response) throws IOException {
                Message message = new Message();
                message.what = 0;
                message.obj = response.body().string();
                mHandler.sendMessage(message);
            }
        });
        return this;
    }
    //定义一个接口,进行回调
    public interface OkHttpListener{
        //成功
        void OkHttpSuccess(String data);
        //失败
        void OkHttpError(String error);

    }
}

 创建Bean实体类

注意:  因为需要排序  ,我们在封装实体类的时候一定要注意 价钱 的类型

public class GoodsBean {

    private String msg;
    private String code;
    private String page;
    private List data;

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public String getPage() {
        return page;
    }

    public void setPage(String page) {
        this.page = page;
    }

    public List getData() {
        return data;
    }

    public void setData(List data) {
        this.data = data;
    }

    public static class DataBean {

        private double bargainPrice;
        private String createtime;
        private String detailUrl;
        private String images;
        private int itemtype;
        private int pid;
        private double price;
        private int pscid;
        private int salenum;
        private int sellerid;
        private String subhead;
        private String title;

        public double getBargainPrice() {
            return bargainPrice;
        }

        public void setBargainPrice(double bargainPrice) {
            this.bargainPrice = bargainPrice;
        }

        public String getCreatetime() {
            return createtime;
        }

        public void setCreatetime(String createtime) {
            this.createtime = createtime;
        }

        public String getDetailUrl() {
            return detailUrl;
        }

        public void setDetailUrl(String detailUrl) {
            this.detailUrl = detailUrl;
        }

        public String getImages() {
            return images;
        }

        public void setImages(String images) {
            this.images = images;
        }

        public int getItemtype() {
            return itemtype;
        }

        public void setItemtype(int itemtype) {
            this.itemtype = itemtype;
        }

        public int getPid() {
            return pid;
        }

        public void setPid(int pid) {
            this.pid = pid;
        }

        public double getPrice() {
            return price;
        }

        public void setPrice(double price) {
            this.price = price;
        }

        public int getPscid() {
            return pscid;
        }

        public void setPscid(int pscid) {
            this.pscid = pscid;
        }

        public int getSalenum() {
            return salenum;
        }

        public void setSalenum(int salenum) {
            this.salenum = salenum;
        }

        public int getSellerid() {
            return sellerid;
        }

        public void setSellerid(int sellerid) {
            this.sellerid = sellerid;
        }

        public String getSubhead() {
            return subhead;
        }

        public void setSubhead(String subhead) {
            this.subhead = subhead;
        }

        public String getTitle() {
            return title;
        }

        public void setTitle(String title) {
            this.title = title;
        }
    }
}

 MVP

1.创建一个CallBack接口

public interface ICallBack {
    void onSuccess(List dataBeans);
    void onFailed(String error);
}

2.创建一个view层接口

public interface GoodsView {
    void onGoodsSuccess(List dataBeans);
    void onGoodsFailed(String error);
}

3.在model层创建一个类

public class GoodsModel {

    public void goodsData(final List dataBeans, int page, int sort, final ICallBack callBack) {
        page = 1;
        //http://www.zhaoapi.cn/product/searchProducts?keywords=%E6%89%8B%E6%9C%BA&page=1&sort=1
        final String goodsUrl = "http://www.zhaoapi.cn/product/searchProducts?keywords=%E6%89%8B%E6%9C%BA&page=" + page + "&sort=" + sort;
        new OkHttpUtil().OkHttpGet(goodsUrl).setOkHttpListener(new OkHttpUtil.OkHttpListener() {
            @Override
            public void OkHttpSuccess(String data) {
                Gson gson = new Gson();
                GoodsBean goodsBean = gson.fromJson(data, GoodsBean.class);
                List beans = goodsBean.getData();
                if (goodsBean.getCode().equals("0")) {
                    callBack.onSuccess(beans);
                } else {
                    callBack.onFailed(goodsBean.getMsg());
                }
            }
            @Override
            public void OkHttpError(String error) {

            }
        });
    }
}

4.在presenter层创建一个类,进行view层和model层的交互与解绑

public class GoodsPresenter {
    private GoodsView mGoodsView;
    private GoodsModel mGoodsModel;

    public GoodsPresenter(GoodsView goodsView) {
        mGoodsView = goodsView;
        mGoodsModel = new GoodsModel();
    }

    //解绑
    public void datechView() {
        mGoodsView = null;
    }

    public void goodsData(List dataBeans, int page, int sort) {
        page = 1;
        mGoodsModel.goodsData(dataBeans, page, sort, new ICallBack() {
            @Override
            public void onSuccess(List dataBeans) {
                mGoodsView.onGoodsSuccess(dataBeans);
            }

            @Override
            public void onFailed(String error) {
                mGoodsView.onGoodsFailed(error);
            }
        });
    }
}

 XRecyclerView适配器

 

public class MyXRecyclerViewAdapter extends RecyclerView.Adapter {

    private Context mContext;
    private List mDataBeans = new ArrayList<>();

    public MyXRecyclerViewAdapter(Context context, List dataBeans) {
        mContext = context;
        mDataBeans = dataBeans;
    }

    //更新适配器
    public void update(List dataBeans) {
        mDataBeans = dataBeans;
        notifyDataSetChanged();
    }

    @NonNull
    @Override
    public MyGoodsViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        View view = LayoutInflater.from(mContext).inflate(R.layout.goods_view, viewGroup, false);
        MyGoodsViewHolder holder = new MyGoodsViewHolder(view);
        return holder;
    }

    @Override
    public void onBindViewHolder(@NonNull final MyGoodsViewHolder myGoodsViewHolder, final int i) {
        String images = mDataBeans.get(i).getImages();
        //分割字符串
        String[] split = images.split("\\|");
        for (int j = 0; j < images.length(); j++) {
            Glide.with(mContext).load(split[0]).into(myGoodsViewHolder.mImageViewGoodsImg);
        }
        myGoodsViewHolder.mTextViewTitle.setText(mDataBeans.get(i).getTitle());
        myGoodsViewHolder.mTextViewPrice.setText(mDataBeans.get(i).getPrice() + "");
        myGoodsViewHolder.mTextViewSalenum.setText(mDataBeans.get(i).getSalenum() + "");
        myGoodsViewHolder.mImageViewGoodsImg.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(mContext, "点击了: " + mDataBeans.get(i).getTitle(), Toast.LENGTH_SHORT).show();
                mGoodsClick.onGoodsClick(i);
            }
        });
    }


    @Override
    public int getItemCount() {
        return mDataBeans == null ? 0 : mDataBeans.size();
    }

    class MyGoodsViewHolder extends RecyclerView.ViewHolder {
        ImageView mImageViewGoodsImg;
        TextView mTextViewTitle, mTextViewPrice, mTextViewSalenum;

        public MyGoodsViewHolder(@NonNull View itemView) {
            super(itemView);
            mImageViewGoodsImg = itemView.findViewById(R.id.goods_img);
            mTextViewTitle = itemView.findViewById(R.id.goods_title);
            mTextViewPrice = itemView.findViewById(R.id.goods_price);
            mTextViewSalenum = itemView.findViewById(R.id.goods_salenum);
        }
    }

    private goodsClick mGoodsClick;

    public void setGoodsClick(goodsClick goodsClick) {
        mGoodsClick = goodsClick;
    }

    //自定义接口
    public interface goodsClick {
        void onGoodsClick(int position);
    }
}

MainActivity

 

public class MainActivity extends AppCompatActivity implements GoodsView, View.OnClickListener {

    private ImageView mImgBack;
    private SearchView mEdTxtView;
    private ImageView mImgDan;
    /**
     * 综合
     */
    private Button mTxtZh;
    /**
     * 销量
     */
    private Button mTxtXl;
    /**
     * 价格
     */
    private Button mTxtJg;
    /**
     * 筛选
     */
    private Button mTxtSx;
    private XRecyclerView mXRv;
    private GoodsPresenter mGoodsPresenter;
    private List mDataBeans = new ArrayList<>();
    private MyXRecyclerViewAdapter mMyXRecyclerViewAdapter;
    private int pager = 1;
    private int sort = 0;
    //先定义一个布尔值用来切换图片
    private boolean b = false;
    private Intent mIntent;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化控件
        initView();
        //创建presenter层实例
        mGoodsPresenter = new GoodsPresenter(this);
        mGoodsPresenter.goodsData(mDataBeans, pager, sort);
        mXRv.setPullRefreshEnabled(true);//开启下拉刷新
        mXRv.setLoadingMoreEnabled(true);//开启上拉加载更多
        mXRv.setLoadingListener(new XRecyclerView.LoadingListener() {
            @Override
            public void onRefresh() {//下拉刷新
                mGoodsPresenter.goodsData(mDataBeans, pager, sort);
                mXRv.refreshComplete();
            }

            @Override
            public void onLoadMore() {//上拉加载更多
                pager++;//每次加一
                mGoodsPresenter.goodsData(mDataBeans, pager, sort);
                mMyXRecyclerViewAdapter.update(mDataBeans);
                mMyXRecyclerViewAdapter.notifyDataSetChanged();
                mXRv.refreshComplete();
            }
        });
        //线性布局管理器
        mXRv.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));

    }

    //初始化控件
    private void initView() {
        mImgBack = (ImageView) findViewById(R.id.img_back);
        mEdTxtView = (SearchView) findViewById(R.id.ed_txt_view);
        mImgDan = (ImageView) findViewById(R.id.img_dan);
        mTxtZh = (Button) findViewById(R.id.txt_zh);
        mTxtXl = (Button) findViewById(R.id.txt_xl);
        mTxtJg = (Button) findViewById(R.id.txt_jg);
        mTxtSx = (Button) findViewById(R.id.txt_sx);
        mXRv = (XRecyclerView) findViewById(R.id.x_rv);
        mImgBack.setOnClickListener(this);
        mImgDan.setOnClickListener(this);
        mTxtZh.setOnClickListener(this);
        mTxtXl.setOnClickListener(this);
        mTxtJg.setOnClickListener(this);
        mTxtSx.setOnClickListener(this);
        mXRv.setOnClickListener(this);
    }

    /**
     * 成功
     *
     * @param dataBeans
     */
    @Override
    public void onGoodsSuccess(final List dataBeans) {
        mMyXRecyclerViewAdapter = new MyXRecyclerViewAdapter(this, dataBeans);
        mXRv.setAdapter(mMyXRecyclerViewAdapter);
        mMyXRecyclerViewAdapter.update(dataBeans);
        mMyXRecyclerViewAdapter.notifyDataSetChanged();
        mMyXRecyclerViewAdapter.setGoodsClick(new MyXRecyclerViewAdapter.goodsClick() {
            @Override
            public void onGoodsClick(int position) {
                mIntent = new Intent(MainActivity.this, CartActivity.class);
                String url = dataBeans.get(position).getDetailUrl();
                int pid = dataBeans.get(position).getPid();
                String replace = url.replace("https", "http");
                mIntent.putExtra("url",replace+pid);
                startActivity(mIntent);
            }
        });
    }

    /**
     * 失败
     *
     * @param error
     */
    @Override
    public void onGoodsFailed(String error) {
        Toast.makeText(this, error, Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            default:
                break;
            case R.id.img_back:
                this.finish();
                break;
            case R.id.img_dan:
                checkIv(v);
                break;
            case R.id.txt_zh://综合排序
                mGoodsPresenter.goodsData(mDataBeans, pager, 0);
                break;
            case R.id.txt_xl:///销量排序
                mGoodsPresenter.goodsData(mDataBeans, pager, 1);
                break;
            case R.id.txt_jg://价格排序
                mGoodsPresenter.goodsData(mDataBeans, pager, 2);
                break;
            case R.id.txt_sx:
                break;
        }
    }

    public void checkIv(View v){
        Toast.makeText(MainActivity.this,"点击了切换视图按钮",Toast.LENGTH_SHORT).show();
        if (b==false) {
            //点击后想要变成什么要的布局样式就搞一个你的需求
            mXRv.setLayoutManager(new GridLayoutManager(this,2));
            //给布尔值重新赋值
            b = true;
            //给点击按钮的图片重新赋值
            mImgDan.setImageResource(R.drawable.duo);
        }else if (b==true) {
            mXRv.setLayoutManager(new LinearLayoutManager(this));
            //给布尔值重新赋值
            b = false;
            //给点击按钮的图片重新赋值
            mImgDan.setImageResource(R.drawable.dan);
        }
    }
}

xml布局

条目布局

点击条目跳转到详情界面

public class CartActivity extends AppCompatActivity {

    private WebView mWv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_cart);
        initView();
        //支持js语言
        mWv.getSettings().setJavaScriptEnabled(true);
        // 缩放至屏幕的大小
        mWv.getSettings().setLoadWithOverviewMode(true);
        //支持缩放
        mWv.getSettings().setSupportZoom(true);
        //取值
        Intent intent = getIntent();
        //获取Intent中的数据
        String url = intent.getStringExtra("url");
        //把字符串赋值给输入框
        mWv.loadUrl(url);
        //设置用自己的浏览器打开
        mWv.setWebViewClient(new MyWebViewClient());
    }

    private void initView() {
        mWv = (WebView) findViewById(R.id.wv);
    }


    //自定义浏览器
    class MyWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return super.shouldOverrideUrlLoading(view, url);
        }
    }

    //预防内存泄露
    @Override
    protected void onPause() {
        super.onPause();
        finish();
    }

}

WebView布局