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这是一个关于实现订单的一些相关功能实现111111111111

发布时间：2021-06-28 00:00| 有位朋友查看

简介：这是一个关于实现订单的一些相关功能仅供参考相关依赖 /* Retrofit 依赖 / implementation ‘com.squareup.retrofit2:retrofit:2.9.0’ / Gson转换器依赖 / implementation ‘com.squareup.retrofit2:converter-gson:2.9.0’ / EventBus 依赖 / implementa……

这是一个关于实现订单的一些相关功能（仅供参考）

相关依赖
/* Retrofit 依赖 / implementation ‘com.squareup.retrofit2:retrofit:2.9.0’
/ Gson转换器依赖 / implementation ‘com.squareup.retrofit2:converter-gson:2.9.0’
/ EventBus 依赖 / implementation ‘org.greenrobot:eventbus:3.2.0’
/ ButterKnife 依赖 /
implementation ‘com.jakewharton:butterknife:10.2.3’
annotationProcessor ‘com.jakewharton:butterknife-compiler:10.2.3’
/ Fresco 依赖 /
implementation ‘com.facebook.fresco:fresco:2.3.0’
implementation ‘com.facebook.fresco:animated-gif:2.3.0’//加载g
/ OkHttp的依赖库 / implementation ‘com.squareup.okhttp3:okhttp:4.9.0’
/ OkHttp日志拦截器依赖 / implementation ‘com.squareup.okhttp3:logging-interceptor:4.9.0’
implementation ‘androidx.recyclerview:recyclerview:1.1.0’//添加RecycleView依赖
/ RxJava 依赖 / implementation ‘io.reactivex.rxjava2:rxjava:2.0.1’
/ RxAndroid 依赖 / implementation ‘io.reactivex.rxjava2:rxandroid:2.0.1’
/ Retrofit支持RxJava2 依赖 / implementation ‘com.squareup.retrofit2:adapter-rxjava2:+’
implementation ‘com.android.support:design:29.0.0’//tablayout 依赖
/ 定位implementation ‘com.amap.api:location:latest.integration’
Android 报错方法数大于报 65536个解决方案个错误信息：
Error: Cannot fit requested classes in a single dex file (# methods: 149346 > 65536)
/方法数超过65536个需要引入该依赖/
implementation ‘com.android.support:multidex:1.0.0’
/build.gradle中defaultConfig中加入该属性/ multiDexEnabled true

使用MVP框架

相关代码实现
地址接口
public interface Constant {

String BASE_URL = "http://47.94.132.125/";
String CART_URL = "api2021/z420210414.json";

}

使用Fresco和Realm
public class MyApp extends Application {

@Override
public void onCreate() {
    super.onCreate();

    Fresco.initialize(this);
    Realm.init(this);

    RealmConfiguration configuration = new RealmConfiguration.Builder()
            .name("bw.realm")
            .schemaVersion(1)
            .build();
}

}

public interface ApiService {

@GET(Constant.CART_URL)
Observable<JavaBean> getCartData();

}

封装数据源JavaBean，有内部类和Realm冲突
public class JavaBean extends RealmObject {

private String id;

private int state;// 1 待支付  2 待收货  3 待评价  4 取消订单 5 已完成

private String time;

public String getTime() {
    return time;
}
public void setTime(String time) {
    this.time = time;
}
private RealmList<ShopcartBean> shopcart;

public String getId() {
    return id;
}
public void setId(String id) {
    this.id = id;
}
public int getState() {
    return state;
}
public void setState(int state) {
    this.state = state;
}
public RealmList<ShopcartBean> getShopcart() {
    return shopcart;
}
public void setShopcart(RealmList<ShopcartBean> shopcart) {
    this.shopcart = shopcart;
}

}

JavaBean中拆分的内部类
public class ShopcartBean extends RealmObject {

/**
 * shopname : 柏丽雅诗日韩新款时尚双肩包
 * style : 黑色  大
 * price : 69.00
 * count : 1
 * image : http://47.94.132.125/api2021/images/z420210414001.png
 */
private String shopname;
private String style;
private String price;
private int count;
private String image;
private boolean isChecked;//TODO 添加了 是否选中单个商品

public boolean isChecked() {
    return isChecked;
}
public void setChecked(boolean checked) {
    isChecked = checked;
}
public String getShopname() {
    return shopname;
}
public void setShopname(String shopname) {
    this.shopname = shopname;
}
public String getStyle() {
    return style;
}
public void setStyle(String style) {
    this.style = style;
}
public String getPrice() {
    return price;
}
public void setPrice(String price) {
    this.price = price;
}
public int getCount() {
    return count;
}
public void setCount(int count) {
    this.count = count;
}
public String getImage() {
    return image;
}
public void setImage(String image) {
    this.image = image;
}

}

网络工具类中用Gson解析器和Rxjava2以及日志拦截器
public class RetrofitManager {

private Retrofit retrofit;
private ApiService apiService;
private static RetrofitManager retrofitManager = null;

private RetrofitManager(){
    //TODO 拦截器
    HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
    interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
    //TODO OkHttpClient
    OkHttpClient okHttpClient = new OkHttpClient.Builder()
            .connectTimeout(5000, TimeUnit.SECONDS)
            .readTimeout(5000,TimeUnit.SECONDS)
            .addInterceptor(interceptor)
            .build();
    //TODO Retrofit
    retrofit = new Retrofit.Builder()
            .baseUrl(Constant.BASE_URL)
            .client(okHttpClient)
            .addConverterFactory(GsonConverterFactory.create())
            .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
            .build();
}

public static RetrofitManager getInstance() {
    if(retrofitManager==null){
        synchronized (RetrofitManager.class){
            if(retrofitManager==null){
                retrofitManager = new RetrofitManager();
            }
        }
    }
    return retrofitManager;
}

public ApiService getApiService() {
    if(apiService == null){
        apiService = retrofit.create(ApiService.class);
    }
    return apiService;
}

public boolean isNetWorkConn(Context context){
    ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo networkInfo = manager.getActiveNetworkInfo();
    if(networkInfo!=null && networkInfo.isConnected()) return true;
    return false;
}

}

下面是关于MVP架构
BaseView
在这里插入图片描述
BasePresenter

MVP的继承类

public interface MainContract {
public interface MainView extends BaseView{
void success(JavaBean javaBean);
void error();
}
public interface IMainPresenter{
void getCartData();
}
}

MainPresenter
在这里插入图片描述

MainActivity

public class MainActivity extends BaseActivity implements MainContract.MainView {

@BindView(R.id.no_data_layout)
LinearLayout noDataLayout;
@BindView(R.id.yes_data_layout)
LinearLayout yesDataLayout;
@BindView(R.id.edit_tv_id)
TextView editTv;
@BindView(R.id.over_tv_id)
TextView overTv;
@BindView(R.id.recycler_view_id)
RecyclerView recyclerView;
@BindView(R.id.all_cb_id)
CheckBox allCheckBox;
@BindView(R.id.all_price_tv_id)
TextView allPriceTv;
@BindView(R.id.js_button_id)
Button jsButton;
@BindView(R.id.sc_button_id)
Button scButton;
private List<ShopcartBean> data;//全局变量的购物车显示的内容
private CartAdapter adapter;
@Override
protected int getLayout() {
    return R.layout.activity_main;
}
@Override
protected void initView() {
    dingwei();
}
@Override
protected MainPresenter initPresenter() {
    return new MainPresenter();
}
@Override
protected void initData() {
    getPresenter().getCartData();
}
@Override
public void success(JavaBean javaBean) {
    Log.e("TAG","---"+javaBean.toString());
    if(javaBean!=null){
        data = javaBean.getShopcart();
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        adapter = new CartAdapter(this,data);
        recyclerView.setAdapter(adapter);
    }
}
@Override
public void error() {
}
//TODO 监听器
@OnClick({R.id.all_cb_id,R.id.edit_tv_id,R.id.over_tv_id,R.id.sc_button_id,R.id.js_button_id})
public void onClick(View view){
   switch (view.getId()){
       case R.id.all_cb_id:
           //TODO -----全选-------------
           boolean isChecked = allCheckBox.isChecked(); //TODO 得到当前“全选”框的状态
           for (int i = 0; i < data.size(); i++) {  //TODO 遍历所有的购物车内容， 然后修改他们的状态
               data.get(i).setChecked(isChecked);
           }
           caleTotal();
           break;
       case R.id.edit_tv_id:
           //TODO ------编辑---------
           allPriceTv.setVisibility(View.GONE);
           jsButton.setVisibility(View.GONE);
           editTv.setVisibility(View.GONE);
           overTv.setVisibility(View.VISIBLE);
           scButton.setVisibility(View.VISIBLE);
           break;
       case R.id.over_tv_id:
           //TODO ------完成---------
           allPriceTv.setVisibility(View.VISIBLE);
           jsButton.setVisibility(View.VISIBLE);
           editTv.setVisibility(View.VISIBLE);
           overTv.setVisibility(View.GONE);
           scButton.setVisibility(View.GONE);
           if(data.size()>0){
               noDataLayout.setVisibility(View.GONE);
               yesDataLayout.setVisibility(View.VISIBLE);
           }else {
               noDataLayout.setVisibility(View.VISIBLE);
               yesDataLayout.setVisibility(View.GONE);
           }
           caleTotal();
           break;
       case R.id.sc_button_id:
           //TODO ------删除---------
           for (int i = 0; i < data.size(); i++) {
               ShopcartBean shopcartBean = data.get(i);
              if(shopcartBean.isChecked()){
                  data.remove(shopcartBean);
              }
           }
           adapter.notifyDataSetChanged();
           caleTotal();
           break;
       case R.id.js_button_id:
           //TODO ------结算---------
           //TODO  构建用户选中的商品集合
           List<ShopcartBean> shopCartBeanList = new ArrayList<>();
           for (int i = 0; i < data.size(); i++) {
               if(data.get(i).isChecked()){
                   shopCartBeanList.add(data.get(i));
               }
           }
           //TODO 传值
           EventBus.getDefault().postSticky(shopCartBeanList);
           startActivity(new Intent(MainActivity.this,QrOrderActivity.class));
           break;
   }
}
//TODO 计算所有选中商品的数量+价格
int totalCount;//总数
int totalPrice;//总价
public void caleTotal(){
    boolean isAllChecked = true;
    totalCount = 0;//重置
    totalPrice = 0;
    for (int i = 0; i < data.size(); i++) {
        ShopcartBean shopcartBean = data.get(i);
        if(shopcartBean.isChecked()){//判断当前数据被选中
            totalCount+=1;//累积数量
            //累积价格
            double price = Double.valueOf(shopcartBean.getPrice());
            totalPrice+= price * shopcartBean.getCount();
        }else {
            isAllChecked = false;
        }
       
    }
    adapter.notifyDataSetChanged();//刷新适配器
    //页面显示累积的数量和价格
    allPriceTv.setText("总价：" + totalPrice);
    jsButton.setText("结算("+totalCount+")");
    allCheckBox.setChecked(isAllChecked);//设置全选的状态
    //TODO 判断总数量如果不为0 ， 可以删除/编辑
    if(totalCount>0){
        jsButton.setEnabled(true);
        scButton.setEnabled(true);
    }else {
        jsButton.setEnabled(false);
        scButton.setEnabled(false);
    }
}
//TODO ---- EventBus : 处理总价+总量---
@Subscribe(threadMode = ThreadMode.MAIN)
public void messageEvent(String msg){
    if("计算总价和总量".equals(msg)){
        caleTotal();
    }
}
@Override
protected void onStart() {
    super.onStart();
    EventBus.getDefault().register(this);
}
@Override
protected void onStop() {
    super.onStop();
    EventBus.getDefault().unregister(this);
}
//TODO -----  定位 -----
public void dingwei(){
    //声明AMapLocationClient类对象
    AMapLocationClient mLocationClient = new AMapLocationClient(getApplicationContext());
    //声明定位回调监听器//设置定位回调监听
    mLocationClient.setLocationListener(new AMapLocationListener() {
        @Override
        public void onLocationChanged(AMapLocation aMapLocation) {
            double wd = aMapLocation.getLatitude();//获取纬度
            double jd = aMapLocation.getLongitude();//获取经度
            Log.e("TAG","纬度：" + wd +",经度:  "+jd);
        }
    });
    //启动定位
    mLocationClient.startLocation();
}

}

通过点击结算按钮，跳到确认订单页面
public class QrOrderActivity extends AppCompatActivity {

private List<ShopcartBean> shopCartBeans;//接收传入的参数
private Unbinder unbinder;
@BindView(R.id.recycler_view_id)
RecyclerView recyclerView;
@BindView(R.id.all_price_tv_id)
TextView allPriceTv;
private Realm realm;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_qr_order);
    unbinder = ButterKnife.bind(this);
    realm = Realm.getDefaultInstance();
}

//TODO ---- 去支付 ----
@OnClick(R.id.qzf_button_id)
public void qzfClick(){
    //TODO  将当前的支付的商品，存入到数据库的订单信息中
    realm.beginTransaction();

    JavaBean javaBean = new JavaBean();
    //TODO 设置id
    String id = UUID.randomUUID().toString();
    javaBean.setId(id);
    javaBean.setState(1); //TODO 设置订单的状态

    SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    String time = df.format(new Date(System.currentTimeMillis()));
    javaBean.setTime(time);//TODO 设置当前订单生成的时间

    //TODO 设置数据
    RealmList<ShopcartBean> realmList = new RealmList<>();
    for (int i = 0; i < shopCartBeans.size(); i++) {
        realmList.add(shopCartBeans.get(i));
    }
    javaBean.setShopcart(realmList);
    //TODO 提交数据
    realm.copyToRealm(javaBean);
    realm.commitTransaction();
    //TODO 跳转进入支付页面
    Intent intent = new Intent(this,ZfActivity.class);
    intent.putExtra("id",id);
    startActivity(intent);
    finish();
}
//TODO ---- EventBus 得到购物车中，传入的需要支付的商品---
@Subscribe(threadMode = ThreadMode.MAIN,sticky = true)
public void getCartShop(List<ShopcartBean> shopCartBeans){
    this.shopCartBeans = shopCartBeans;
    //展示数据
    recyclerView.setLayoutManager(new LinearLayoutManager(this));
    QrOrderAdapter adapter = new QrOrderAdapter(this,shopCartBeans);
    recyclerView.setAdapter(adapter);
    //计算总价
    caleTotal();
}
//TODO 计算所有选中商品的价格
int totalPrice;//总价
public void caleTotal(){
    totalPrice = 0;
    for (int i = 0; i < shopCartBeans.size(); i++) {
        ShopcartBean shopcartBean = shopCartBeans.get(i);
        if(shopcartBean.isChecked()){//判断当前数据被选中
            //累积价格
            double price = Double.valueOf(shopcartBean.getPrice());
            totalPrice+= price * shopcartBean.getCount();
        }
    }
    allPriceTv.setText("总价：" + totalPrice);
}
@Override
protected void onStart() {
    super.onStart();
    EventBus.getDefault().register(this);
}
@Override
protected void onStop() {
    super.onStop();
    EventBus.getDefault().unregister(this);
}
@Override
protected void onDestroy() {
    super.onDestroy();
    unbinder.unbind();
}

}

点击确认支付，跳转到支付页面
public class ZfActivity extends AppCompatActivity {

private Unbinder unbinder;
private String id;
private Realm realm;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_zf);

    unbinder = ButterKnife.bind(this);
    //获取传入的id参数
    id = getIntent().getStringExtra("id");

    realm = Realm.getDefaultInstance();
}
@OnClick({R.id.close_image_id,R.id.pay_id})
public void onClick(View view){
    switch (view.getId()){
        case R.id.close_image_id:
            startActivity(new Intent(this,OrderActivity.class));
            finish();
            break;
        case R.id.pay_id:
            //TODO ---- 确认支付 ---- 修改订单中状态 ---
            realm.beginTransaction();
            JavaBean javaBean = realm.where(JavaBean.class).equalTo("id",id).findFirst();//根据id查询数据库中的内容
            javaBean.setState(2);//支付完成  -- 状态修改为： 2  待收货
            realm.commitTransaction();
            //todo 支付完成后， 进入订单页面
            startActivity(new Intent(this,OrderActivity.class));
            finish();
            break;
    }
}
@Override
protected void onDestroy() {
    super.onDestroy();
    unbinder.unbind();
}

}

支付完成后进入到订单页面（内含tablayout）
public class OrderActivity extends AppCompatActivity {

private Unbinder unbinder;
@BindView(R.id.tab_layout_id)
TabLayout tabLayout;
@BindView(R.id.recycler_view_id)
RecyclerView recyclerView;
@BindView(R.id.no_data_image_id)
ImageView imageView;
private Realm realm;
private String[] titles = {"全部","待支付","待收货","待评价","取消订单","已完成"};
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_order);
    realm = Realm.getDefaultInstance();
    unbinder = ButterKnife.bind(this);
    initTab();
    initData(0);//TODO 默认加载全部
}
//TODO 构建标签
private void initTab() {
    for (int i = 0; i < titles.length; i++) {
        tabLayout.addTab(tabLayout.newTab().setText(titles[i]));
    }
    tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
        @Override
        public void onTabSelected(TabLayout.Tab tab) {
            switch (tab.getPosition()){
                case 0:
                    recyclerView.setVisibility(View.VISIBLE);
                    imageView.setVisibility(View.GONE);
                    initData(0);
                    break;
                case 1:
                    recyclerView.setVisibility(View.VISIBLE);
                    imageView.setVisibility(View.GONE);
                    initData(1);
                    break;
                default:
                    recyclerView.setVisibility(View.GONE);
                    imageView.setVisibility(View.VISIBLE);
                    break;
            }
        }
        @Override
        public void onTabUnselected(TabLayout.Tab tab) {

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

        }
    });
}
//TODO 加载数据
private void initData(int state){
    RealmResults<JavaBean> javaBeans = null;
    if(state == 0){//全部
      javaBeans = realm.where(JavaBean.class).findAll();
    }else if(state == 1){//待支付
        javaBeans = realm.where(JavaBean.class).equalTo("state", 1).findAll();
    }
    //设置适配器
    if(javaBeans!=null && javaBeans.size()>0){
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        HomeOrderAdapter adapter  = new HomeOrderAdapter(this,javaBeans);
        recyclerView.setAdapter(adapter);
    }
}
@Override
protected void onDestroy() {
    super.onDestroy();
    unbinder.unbind();
}

}

第一个适配器，订单下载数据
public class CartAdapter extends RecyclerView.Adapter<CartAdapter.ViewHolder> {

private Context context;
private List<ShopcartBean> data;
public CartAdapter(Context context, List<ShopcartBean> data) {
    this.context = context;
    this.data = data;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    return new ViewHolder(View.inflate(context,R.layout.cart_item,null));
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
    holder.checkBox.setChecked(data.get(position).isChecked());
    holder.simpleDraweeView.setImageURI(data.get(position).getImage());
    holder.nameTv.setText(data.get(position).getShopname());
    holder.priceTv.setText("￥"+data.get(position).getPrice());
    holder.addAndMinusView.setCount(data.get(position));
    //TODO 点击多选框， 更改总价+总量
    holder.checkBox.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            boolean isChecked = holder.checkBox.isChecked();//得到当前控件的状态
            data.get(position).setChecked(isChecked);//将当前的状态，设置到数据源中
            EventBus.getDefault().post("计算总价和总量");
        }
    });
}
@Override
public int getItemCount() {
    return data.size();
}
class ViewHolder extends RecyclerView.ViewHolder{
    @BindView(R.id.cb_id)
    CheckBox checkBox;
    @BindView(R.id.sdv_id)
    SimpleDraweeView simpleDraweeView;
    @BindView(R.id.name_id)
    TextView nameTv;
    @BindView(R.id.price_id)
    TextView priceTv;
    @BindView(R.id.add_minus_id)
    AddAndMinusView addAndMinusView;
    public ViewHolder(@NonNull View itemView) {
        super(itemView);
        ButterKnife.bind(this,itemView);
    }
}

}

第二个适配器，确认订单的适配器
public class QrOrderAdapter extends RecyclerView.Adapter<QrOrderAdapter.ViewHolder> {

private Context context;
private List<ShopcartBean> data;
public QrOrderAdapter(Context context, List<ShopcartBean> data) {
    this.context = context;
    this.data = data;
}

@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    return new ViewHolder(View.inflate(context,R.layout.qr_order_item,null));
}

@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
    holder.simpleDraweeView.setImageURI(data.get(position).getImage());
    holder.nameTv.setText(data.get(position).getShopname());
    holder.priceTv.setText("￥"+data.get(position).getPrice());
    holder.addAndMinusView.setCount(data.get(position));
}

@Override
public int getItemCount() {
    return data.size();
}

class ViewHolder extends RecyclerView.ViewHolder{
    @BindView(R.id.sdv_id)
    SimpleDraweeView simpleDraweeView;
    @BindView(R.id.name_id)
    TextView nameTv;
    @BindView(R.id.price_id)
    TextView priceTv;
    @BindView(R.id.add_minus_id)
    AddAndMinusView addAndMinusView;
    public ViewHolder(@NonNull View itemView) {
        super(itemView);
        ButterKnife.bind(this,itemView);
    }
}

}

第三个适配器，待支付适配器

public class DzfAdapter extends RecyclerView.Adapter<DzfAdapter.ViewHolder> {

private Context context;
private List<ShopcartBean> data;
public DzfAdapter(Context context, List<ShopcartBean> data) {
    this.context = context;
    this.data = data;
}

@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    return new ViewHolder(View.inflate(context,R.layout.dzf_item,null));
}

@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
    holder.simpleDraweeView.setImageURI(data.get(position).getImage());
    holder.nameTv.setText(data.get(position).getShopname());
    holder.priceTv.setText("￥ "+ data.get(position).getPrice());
    holder.numTv.setText("x"+data.get(position).getCount());
}

@Override
public int getItemCount() {
    return data.size();
}

class ViewHolder extends RecyclerView.ViewHolder{
    @BindView(R.id.name_id)
    TextView nameTv;
    @BindView(R.id.price_id)
    TextView priceTv;
    @BindView(R.id.sdv_id)
    SimpleDraweeView simpleDraweeView;
    @BindView(R.id.tv_num)
    TextView numTv;
    public ViewHolder(@NonNull View itemView) {
        super(itemView);
        ButterKnife.bind(this,itemView);
    }
}

}

第四个适配器，待收货适配器
public class QxOrderAdapter extends RecyclerView.Adapter<QxOrderAdapter.ViewHolder> {

private Context context;
private List<ShopcartBean> data;
public QxOrderAdapter(Context context, List<ShopcartBean> data) {
    this.context = context;
    this.data = data;
}

@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    return new ViewHolder(View.inflate(context,R.layout.qx_order_item,null));
}

@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
    holder.simpleDraweeView.setImageURI(data.get(position).getImage());
    holder.nameTv.setText(data.get(position).getShopname());
    holder.priceTv.setText("￥ "+ data.get(position).getPrice());
    holder.numTv.setText("x"+data.get(position).getCount());
}

@Override
public int getItemCount() {
    return data.size();
}

class ViewHolder extends RecyclerView.ViewHolder{
    @BindView(R.id.name_id)
    TextView nameTv;
    @BindView(R.id.price_id)
    TextView priceTv;
    @BindView(R.id.sdv_id)
    SimpleDraweeView simpleDraweeView;
    @BindView(R.id.tv_num)
    TextView numTv;
    public ViewHolder(@NonNull View itemView) {
        super(itemView);
        ButterKnife.bind(this,itemView);
    }
}

}

第五个适配器，订单页面的适配器（包括待支付和待收货）
public class HomeOrderAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

private Context context;
private RealmResults<JavaBean> data;
public HomeOrderAdapter(Context context, RealmResults<JavaBean> data) {
    this.context = context;
    this.data = data;
}

@Override
public int getItemViewType(int position) {
    if(data.get(position).getState() == 1){
        //待支付
        return 1;
    }else if(data.get(position).getState()==4){
        //取消订单
        return 4;
    }
    return 4;
}

@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    if(viewType == 1){
        return new DzfViewHolder(View.inflate(context,R.layout.dzf,null));
    }else if(viewType == 4){
        return new QxOrderViewHolder(View.inflate(context,R.layout.qx_order,null));
    }
    return null;
}

@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
    if(holder instanceof DzfViewHolder){
        //TODO 待支付
        //TODO --- 总价 ---
        int totalPrice = 0;
        List<ShopcartBean> shopcartBeanList = data.get(position).getShopcart();
        for (int i = 0; i < shopcartBeanList.size(); i++) {
            ShopcartBean shopcartBean = shopcartBeanList.get(i);
             double price = Double.valueOf(shopcartBean.getPrice());
             totalPrice+= price * shopcartBean.getCount();
        }
        ((DzfViewHolder) holder).allPriceTv.setText("总价：" + totalPrice);

        //TODO --- 商品信息 ----
        ((DzfViewHolder) holder).recyclerView.setLayoutManager(new LinearLayoutManager(context));
        ((DzfViewHolder) holder).recyclerView.setAdapter(new DzfAdapter(context,data.get(position).getShopcart()));

        //TODO --- 倒计时 ---
        getTimeDuring(data.get(position).getTime(),((DzfViewHolder) holder).timeTv,data.get(position).getId());

        //TODO 点击取消订单
        ((DzfViewHolder) holder).qxButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //倒计时结束： 取消订单
                Realm realm = Realm.getDefaultInstance();
                realm.beginTransaction();
                JavaBean javaBean = realm.where(JavaBean.class).equalTo("id",data.get(position).getId()).findFirst();
                javaBean.setState(4);//TODO 取消订单
                realm.commitTransaction();
                notifyDataSetChanged();//刷新适配器
            }
        });
    }else if(holder instanceof  QxOrderViewHolder){
        //TODO --- 总价 ---
        int totalPrice = 0;
        List<ShopcartBean> shopcartBeanList = data.get(position).getShopcart();
        for (int i = 0; i < shopcartBeanList.size(); i++) {
            ShopcartBean shopcartBean = shopcartBeanList.get(i);
            double price = Double.valueOf(shopcartBean.getPrice());
            totalPrice+= price * shopcartBean.getCount();
        }
        ((QxOrderViewHolder) holder).allPriceTv.setText("总价： " + totalPrice);
        ((QxOrderViewHolder) holder).recyclerView.setLayoutManager(new LinearLayoutManager(context));
        ((QxOrderViewHolder) holder).recyclerView.setAdapter(new QxOrderAdapter(context,data.get(position).getShopcart()));
    }
}
@Override
public int getItemCount() {
    return data.size();
}
//TODO ---- 声明ViewHolder -----
//TODO 待支付的布局  -- dzf
class DzfViewHolder extends RecyclerView.ViewHolder{
    @BindView(R.id.time_tv)
    TextView timeTv;
    @BindView(R.id.recycler_view_id)
    RecyclerView recyclerView;
    @BindView(R.id.all_price_tv_id)
    TextView allPriceTv;
    @BindView(R.id.qx_order_button_id)
    Button qxButton;
    public DzfViewHolder(@NonNull View itemView) {
        super(itemView);
        ButterKnife.bind(this,itemView);
    }
}
//TODO 订单取消的布局 -- qx_order
class QxOrderViewHolder extends RecyclerView.ViewHolder{
    @BindView(R.id.recycler_view_id)
    RecyclerView recyclerView;
    @BindView(R.id.all_price_tv_id)
    TextView allPriceTv;
    public QxOrderViewHolder(@NonNull View itemView) {
        super(itemView);
        ButterKnife.bind(this,itemView);
    }
}
private Handler handler = new Handler();
long countdownTime;//当前显示的倒计时时长
private void getTimeDuring(String timefromServer,TextView timeTv,String id) {
    int chaoshitime = 10 * 60 * 1000;//应该从服务器获取
    SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
     try {
            Date serverDate = df.parse(timefromServer);
            long duringTime = new Date().getTime() - serverDate.getTime();//计算当前时间和从服务器获取的订单生成时间的时间差
             countdownTime = chaoshitime - duringTime;//计算倒计时的总时间
            handler.postDelayed(new Runnable() {
                @Override
                public void run() {
                    countdownTime -= 1000;//倒计时总时间减1
                    SimpleDateFormat minforamt = new SimpleDateFormat("mm:ss");
                    String hms = minforamt.format(countdownTime);//格式化倒计时的总时间
                    timeTv.setText("倒计时：" + hms);
                    if(hms.equals("00:00")){
                      //倒计时结束： 取消订单
                        Realm realm = Realm.getDefaultInstance();
                        realm.beginTransaction();
                        JavaBean javaBean = realm.where(JavaBean.class).equalTo("id",id).findFirst();
                        javaBean.setState(4);//TODO 取消订单
                        realm.commitTransaction();
                        notifyDataSetChanged();//刷新适配器
                    }else {
                        handler.postDelayed(this, 1000);
                    }
                }
            }, 1000);
        } catch (ParseException e) {
        e.printStackTrace();
        }
}

}

主页面的布局（复选框会涉及到全选等功能，检查仔细）

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android=“http://schemas.android.com/apk/res/android”

xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".view.activity.MainActivity"
android:orientation="vertical"
>

<!--没有数据显示的布局-->
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:id="@+id/no_data_layout"
    android:visibility="gone">
    <TextView
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:background="#00f"
        android:gravity="center"
        android:text="购物车"
        android:textSize="30sp"
        android:textColor="#fff"/>
    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@mipmap/error"/>
</LinearLayout>
<!--有数据-->
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/yes_data_layout"
    android:orientation="vertical">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:background="#00f"
        >
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="购物车"
            android:textColor="#fff"
            android:textSize="30sp"
            android:layout_centerInParent="true"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="编辑"
            android:textSize="20sp"
            android:textColor="#f00"
            android:layout_alignParentRight="true"
            android:layout_marginRight="30dp"
            android:layout_centerVertical="true"
            android:id="@+id/edit_tv_id"/>
        <TextView
            android:visibility="gone"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="完成"
            android:textSize="20sp"
            android:textColor="#f00"
            android:layout_alignParentRight="true"
            android:layout_marginRight="30dp"
            android:layout_centerVertical="true"
            android:id="@+id/over_tv_id"/>
    </RelativeLayout>
    <androidx.recyclerview.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:id="@+id/recycler_view_id"/>
    <!--底部-->
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <CheckBox
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/all_cb_id"
            android:text="全选"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/all_price_tv_id"
            android:text="总价：￥ 0"
            android:layout_toRightOf="@id/all_cb_id"
            android:layout_centerVertical="true"
            android:layout_marginLeft="30dp"
            />
        <Button
            android:enabled="false"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/js_button_id"
            android:text="结算(0)"
            android:layout_alignParentRight="true"/>
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/sc_button_id"
            android:text="删除"
            android:visibility="gone"
            android:enabled="false"
            android:layout_alignParentRight="true"/>

    </RelativeLayout>
</LinearLayout>

对应第一个适配器，用于加载主页面的数据，加减器

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android=“http://schemas.android.com/apk/res/android”

android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="horizontal"
android:layout_margin="10dp">

<CheckBox
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/cb_id"/>

<com.facebook.drawee.view.SimpleDraweeView
    android:layout_width="80dp"
    android:layout_height="80dp"
    app:placeholderImage="@mipmap/loding"
    app:failureImage="@mipmap/error"
    android:id="@+id/sdv_id"
    />
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/name_id"
        android:text="商品名称"/>
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/price_id"
            android:text="￥123"
            android:textColor="#f00"/>
        <!--加减器-->
        <com.bawei.day17.view.weight.AddAndMinusView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/add_minus_id"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"/>
    </RelativeLayout>
</LinearLayout>

加减器页面

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout
xmlns:android=“http://schemas.android.com/apk/res/android”

android:layout_width="wrap_content"
android:layout_height="50dp"
android:orientation="horizontal"
>
<TextView
    android:layout_width="30dp"
    android:layout_height="match_parent"
    android:text="-"
    android:id="@+id/tv_minus"
    android:gravity="center"/>
<TextView
    android:layout_width="40dp"
    android:layout_height="match_parent"
    android:text="0"
    android:id="@+id/tv_num"
    android:gravity="center"
    android:background="#ccc"/>
<TextView
    android:layout_width="30dp"
    android:layout_height="match_parent"
    android:text="+"
    android:id="@+id/tv_add"
    android:gravity="center"/>

加减器的代码（有些方法需要在别处调用才能实现）
public class AddAndMinusView extends LinearLayout {

private ShopcartBean data;
private TextView addTv,numTv,minusTv;
public AddAndMinusView(Context context) {
    super(context);
}

public AddAndMinusView(Context context, @Nullable AttributeSet attrs) {

    super(context, attrs);
    View.inflate(context, R.layout.add_and_minus,this);
    addTv = findViewById(R.id.tv_add);
    numTv = findViewById(R.id.tv_num);
    minusTv = findViewById(R.id.tv_minus);
    //TODO 设置 - 的监听器
    minusTv.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            if(data.getCount()>1){
                int count = data.getCount()-1;
                data.setCount(count);
                numTv.setText(String.valueOf(data.getCount()));
            }else {
                Toast.makeText(context, "商品数量不能少于1", Toast.LENGTH_SHORT).show();
            }
            //TODO 不管是增加还是减少， 最终都需要和总结+总数量挂钩
            EventBus.getDefault().post("计算总价和总数量");

        }
    });
    //TODO 设置 + 的监听器
    addTv.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            int count = data.getCount()+1;
            data.setCount(count);
            //TODO 将当前修改后的数量， 设置到控件上
            numTv.setText(String.valueOf(data.getCount()));
            //TODO 不管是增加还是减少， 最终都需要和总结+总数量挂钩
            EventBus.getDefault().post("计算总价和总数量");
        }
    });
}
//TODO 提供设置数量的方法
public void setCount(ShopcartBean shopcartBean){
    this.data = shopcartBean;
    numTv.setText(String.valueOf(data.getCount()));
}

}

确认订单页面

<?xml version="1.0" encoding="utf-8"?>

<TextView
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:background="#00f"
    android:gravity="center"
    android:text="确认订单"
    android:textColor="#fff"
    android:textSize="30sp"/>
<androidx.recyclerview.widget.RecyclerView
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1"
    android:id="@+id/recycler_view_id"/>
<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/all_price_tv_id"
        android:text="总价：￥0"
        android:layout_centerVertical="true"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:text="去支付"
        android:id="@+id/qzf_button_id"/>
</RelativeLayout>

确认订单的item

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android=“http://schemas.android.com/apk/res/android”

android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="horizontal"
android:layout_margin="10dp">
 <CheckBox
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/cb_id"/>


<com.facebook.drawee.view.SimpleDraweeView
    android:layout_width="80dp"
    android:layout_height="80dp"
    app:placeholderImage="@mipmap/loding"
    app:failureImage="@mipmap/error"
    android:id="@+id/sdv_id"
    />

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

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/name_id"
        android:text="商品名称"/>


    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/price_id"
            android:text="￥123"
            android:textColor="#f00"/>
        <!--加载器-->
        <com.bawei.day17.view.weight.AddAndMinusView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/add_minus_id"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"/>
    </RelativeLayout>
</LinearLayout>

确认订单页面点击去支付跳转到确认支付页面

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android=“http://schemas.android.com/apk/res/android”

xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".view.activity.ZfActivity"
android:orientation="vertical">

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="60dp"
    android:background="#00f">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="确认支付"
        android:textColor="#fff"
        android:textSize="30sp"
        android:layout_centerInParent="true"/>

    <ImageView
        android:layout_width="35dp"
        android:layout_height="35dp"
        android:src="@mipmap/gb"
        android:layout_centerVertical="true"
        android:layout_alignParentRight="true"
        android:layout_marginRight="30dp"
        android:id="@+id/close_image_id"/>
</RelativeLayout>

<RadioGroup
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/rg_id"
    android:orientation="vertical"
    android:padding="30dp">

    <RadioButton
        android:id="@+id/rb_01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="微信支付"
        android:checked="true"/>
    <RadioButton
        android:id="@+id/rb_02"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="支付宝支付"/>
</RadioGroup>

<Button
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="确认支付"
    android:layout_margin="30dp"
    android:id="@+id/pay_id"
    />

点击确认支付进入订单页面

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android=“http://schemas.android.com/apk/res/android”

xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".view.activity.OrderActivity">

<TextView
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:background="#00f"
    android:gravity="center"
    android:text="订单页面"
    android:textSize="30sp"
    android:textColor="#fff"/>

<com.google.android.material.tabs.TabLayout
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1"
    android:id="@+id/tab_layout_id"/>

<androidx.recyclerview.widget.RecyclerView
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="8"
    android:id="@+id/recycler_view_id"/>

<ImageView
    android:visibility="gone"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="8"
    android:src="@mipmap/error"
    android:id="@+id/no_data_image_id"/>

订单页面中的tablayout可以实现点击切换订单的状态（包含待支付和取消订单页面）
待支付页面

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android=“http://schemas.android.com/apk/res/android”

android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp">

<!-- 待收货的订单Item -->
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="10dp"
    android:orientation="vertical">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="待支付"/>
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/time_tv"
            android:text="倒计时："
            android:textColor="#f00"
            android:layout_alignParentRight="true"
            />
    </RelativeLayout>

    <!-- 订单商品详情 -->
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recycler_view_id"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <!-- 商品件数显示区域 -->
    <TextView
        android:id="@+id/all_price_tv_id"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="right"
        android:text="商品总价"
        android:layout_marginBottom="8dp"/>
    <!-- 操作按钮 -->
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <Button
            android:id="@+id/qx_order_button_id"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="取消订单" />

        <Button
            android:id="@+id/btn_pay"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:textColor="@android:color/white"
            android:text="去支付" />
    </RelativeLayout>
</LinearLayout>

待支付Item

<?xml version="1.0" encoding="utf-8"?>

<!-- 商品图片 -->
<com.facebook.drawee.view.SimpleDraweeView
    android:id="@+id/sdv_id"
    android:layout_width="80dp"
    android:layout_height="80dp"
    fresco:failureImage="@mipmap/error"
    fresco:failureImageScaleType="centerCrop"
    fresco:placeholderImage="@mipmap/loding"
    fresco:placeholderImageScaleType="centerCrop"
    fresco:roundAsCircle="true" />

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

    <!-- 商品名称 -->
    <TextView
        android:id="@+id/name_id"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:maxLines="3"
        android:ellipsize="end"
        android:textSize="12sp"
        android:text="商品的名称"
        android:paddingLeft="10dp"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <!-- 商品价格 -->
        <TextView
            android:id="@+id/price_id"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="match_parent"
            android:text="￥320"
            android:textColor="#F00"
            android:gravity="center_vertical"
            android:paddingLeft="10dp"/>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/tv_num"
            android:text="×1"/>
    </LinearLayout>

</LinearLayout>

取消订单页

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android=“http://schemas.android.com/apk/res/android”

android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:background="#ccc">

<!-- 待收货的订单Item -->
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="10dp"
    android:orientation="vertical">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="订单取消"/>


    <!-- 订单商品详情 -->
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recycler_view_id"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <!-- 商品件数显示区域 -->
    <TextView
        android:id="@+id/all_price_tv_id"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="right"
        android:text="商品总价"
        android:layout_marginBottom="8dp"/>

</LinearLayout>

取消订单页面item 与待收货页面相同

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android=“http://schemas.android.com/apk/res/android”

xmlns:fresco="http://schemas.android.com/apk/res-auto"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="8dp">

<!-- 商品图片 -->
<com.facebook.drawee.view.SimpleDraweeView
    android:id="@+id/sdv_id"
    android:layout_width="80dp"
    android:layout_height="80dp"
    fresco:failureImage="@mipmap/error"
    fresco:failureImageScaleType="centerCrop"
    fresco:placeholderImage="@mipmap/loding"
    fresco:placeholderImageScaleType="centerCrop"
    fresco:roundAsCircle="true" />

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

    <!-- 商品名称 -->
    <TextView
        android:id="@+id/name_id"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:maxLines="3"
        android:ellipsize="end"
        android:textSize="12sp"
        android:text="商品的名称"
        android:paddingLeft="10dp"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <!-- 商品价格 -->
        <TextView
            android:id="@+id/price_id"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="match_parent"
            android:text="￥320"
            android:textColor="#F00"
            android:gravity="center_vertical"
            android:paddingLeft="10dp"/>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/tv_num"
            android:text="×1"/>
    </LinearLayout>

</LinearLayout>

整个项目大概的一个过程
在这里插入图片描述

；原文链接：https://blog.csdn.net/Android_20_11_13/article/details/115654214
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