购物车模块详细代码

xiaoxiao2025-06-02 43

//先是布局主页面

<?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="match_parent">

<RelativeLayout android:id="@+id/rl_title" android:layout_width="match_parent" android:layout_height="48dp">

</RelativeLayout>

<RelativeLayout android:id="@+id/rl_bottom" android:layout_width="match_parent" android:layout_height="48dp" android:layout_alignParentBottom="true">

<android.support.v7.widget.RecyclerView android:id="@+id/rv_shopper" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_above="@id/rl_bottom" android:layout_below="@id/rl_title"></android.support.v7.widget.RecyclerView>

</RelativeLayout>

//商品布局

<?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" android:orientation="vertical">

<android.support.v7.widget.RecyclerView android:id="@+id/rv_product" android:layout_width="match_parent" android:layout_height="wrap_content">

</android.support.v7.widget.RecyclerView>

</LinearLayout>

//详情布局

<?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:orientation="horizontal" android:paddingBottom="5dp" android:paddingLeft="20dp" android:paddingRight="5dp" android:paddingTop="5dp">

<com.bwie.cart1023.widget.AddDecreaseView android:id="@+id/adv_product" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true"></com.bwie.cart1023.widget.AddDecreaseView>

</RelativeLayout>

//加减器的布局

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="70dp" android:layout_height="wrap_content">

//Inter层

package com.bwie.cart1023.inter;

/** * Created by eric on 2018/10/22. */

public interface INetCallBack { void success(Object obj);

void failed(Exception e); }

//Utils层

package com.bwie.cart1023.utils;

import android.os.Handler; import android.os.Looper;

import com.bwie.cart1023.inter.INetCallBack; import com.google.gson.Gson;

import java.io.IOException; import java.lang.reflect.Type; import java.util.concurrent.TimeUnit;

import okhttp3.Call; import okhttp3.Callback; import okhttp3.OkHttpClient; import okhttp3.Request; import okhttp3.Response; import okhttp3.logging.HttpLoggingInterceptor;

/** * Created by eric on 2018/10/22. */

public class HttpUtils { private static volatile HttpUtils instance;

private OkHttpClient client;

private Handler handler = new Handler(Looper.getMainLooper());

private HttpUtils() { HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor(); interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

client = new OkHttpClient.Builder() .connectTimeout(5, TimeUnit.SECONDS) .addInterceptor(interceptor) .build(); }

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

public void get(String url, final INetCallBack callBack, final Type type) { Request request = new Request.Builder() .get() .url(url) .build();

Call call = client.newCall(request); call.enqueue(new Callback() { @Override public void onFailure(Call call, final IOException e) { handler.post(new Runnable() { @Override public void run() { callBack.failed(e); } }); }

@Override public void onResponse(Call call, Response response) throws IOException { String result = response.body().string(); Gson gson = new Gson(); final Object o = gson.fromJson(result, type); handler.post(new Runnable() { @Override public void run() { callBack.success(o); } }); } }); } }

//Utils转换层

package com.bwie.cart1023.utils;

/** * Created by eric on 2018/10/22. */

public class StringUtils { public static String https2Http(String url) { return url.replace("https", "http"); } }

//bean层

package com.bwie.cart1023.bean;

import java.util.List;

/** * Created by eric on 2018/10/23. */

public class MessageBean<T> { private String msg; private String code; private T 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 T getData() { return data; }

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

//网络请求层省略

//第三层

package com.bwie.cart1023.bean;

/** * Created by eric on 2018/10/23. */

public class Shopper<T> { private String sellerid; private String sellerName; private boolean isChecked; private T list;

public String getSellerid() { return sellerid; }

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

public String getSellerName() { return sellerName; }

public void setSellerName(String sellerName) { this.sellerName = sellerName; }

public boolean isChecked() { return isChecked; }

public void setChecked(boolean checked) { isChecked = checked; }

public T getList() { return list; }

public void setList(T list) { this.list = list; } }

//M层

package com.bwie.cart1023.cart.model;

import com.bwie.cart1023.inter.INetCallBack; import com.bwie.cart1023.utils.HttpUtils;

import java.lang.reflect.Type;

/** * Created by eric on 2018/10/23. */

public class CartModel { public void getData(String url, INetCallBack callBack, Type type) { HttpUtils.getInstance().get(url, callBack, type); } }

//V层

package com.bwie.cart1023.cart.view;

import com.bwie.cart1023.bean.MessageBean; import com.bwie.cart1023.bean.Product; import com.bwie.cart1023.bean.Shopper;

import java.util.List;

/** * Created by eric on 2018/10/23. */

public interface IView { void success(MessageBean<List<Shopper<List<Product>>>> data);

void failed(Exception e); }

//P层

package com.bwie.cart1023.cart.presenter;

import com.bwie.cart1023.bean.MessageBean; import com.bwie.cart1023.bean.Product; import com.bwie.cart1023.bean.Shopper; import com.bwie.cart1023.cart.model.CartModel; import com.bwie.cart1023.cart.view.IView; import com.bwie.cart1023.inter.INetCallBack; import com.google.gson.reflect.TypeToken;

import java.lang.reflect.Type; import java.util.List;

/** * Created by eric on 2018/10/23. */

public class CartPresenter { private IView iv; private CartModel model;

public void attach(IView iv) { this.iv = iv; model = new CartModel(); }

public void getData() { String url = "http://www.zhaoapi.cn/product/getCarts?uid=1538"; Type type = new TypeToken<MessageBean<List<Shopper<List<Product>>>>>() { }.getType();

model.getData(url, new INetCallBack() { @Override public void success(Object obj) { MessageBean<List<Shopper<List<Product>>>> data = (MessageBean<List<Shopper<List<Product>>>>) obj; iv.success(data); }

@Override public void failed(Exception e) { iv.failed(e); } }, type);

}

public void detach() { if (iv != null) { iv = null; } } }

//加减器

package com.bwie.cart1023.widget;

import android.content.Context; import android.util.AttributeSet; import android.view.View; import android.widget.RelativeLayout; import android.widget.TextView;

import com.bwie.cart1023.R;

/** * Created by eric on 2018/10/23. */

public class AddDecreaseView extends RelativeLayout implements View.OnClickListener { private TextView txtAdd; private TextView txtDecrease; private TextView txtNum;

private int num;

public interface OnAddDecreaseClickListener { void add(int num);

void decrease(int num); }

private OnAddDecreaseClickListener listener;

public void setOnAddDecreaseClickListener(OnAddDecreaseClickListener listener) { this.listener = listener; }

public AddDecreaseView(Context context) { this(context, null); }

public AddDecreaseView(Context context, AttributeSet attrs) { this(context, attrs, 0); }

public AddDecreaseView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); init(context); }

private void init(Context context) { View.inflate(context, R.layout.item_add_decrease, this); txtAdd = findViewById(R.id.txt_add); txtDecrease = findViewById(R.id.txt_decrease); txtNum = findViewById(R.id.txt_num);

txtNum.setText("1");

txtAdd.setOnClickListener(this); txtDecrease.setOnClickListener(this);

}

public void setNum(int num) { this.num = num; txtNum.setText(num + ""); }

public int getNum() { return num; }

@Override public void onClick(View v) { switch (v.getId()) { case R.id.txt_add: num++; txtNum.setText(num + ""); if (listener != null) { listener.add(num); } break; case R.id.txt_decrease: if (num > 1) { num--; } txtNum.setText(num + ""); if (listener != null) { listener.decrease(num); } break; } } }

//两个Adapter

package com.bwie.cart1023.adapter;

import android.content.Context; import android.support.annotation.NonNull; import android.support.v7.widget.RecyclerView; import android.text.TextUtils; import android.view.View; import android.view.ViewGroup; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.ImageView; import android.widget.TextView;

import com.bumptech.glide.Glide; import com.bwie.cart1023.R; import com.bwie.cart1023.bean.Product; import com.bwie.cart1023.utils.StringUtils; import com.bwie.cart1023.widget.AddDecreaseView;

import java.util.List;

/** * Created by eric on 2018/10/23. */

public class ProductAdapter extends RecyclerView.Adapter<ProductAdapter.ViewHolder> { private Context context; private List<Product> list;

// 二级条目（商品）点击监听 public interface OnProductClickListener { void onProductClick(int position, boolean isChecked); }

private OnProductClickListener productClickListener;

public void setOnProductClickListener(OnProductClickListener listener) { this.productClickListener = listener; }

// 加减器发生变化的监听 public interface OnAddDecreaseProductListener { void onChange(int position, int num); }

private OnAddDecreaseProductListener productListener;

public void setOnAddDecreaseProductListener(OnAddDecreaseProductListener listener) { this.productListener = listener; }

public ProductAdapter(Context context, List<Product> list) { this.context = context; this.list = list; }

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

@Override public void onBindViewHolder(@NonNull ViewHolder holder, final int position) { final Product product = list.get(position); String images = product.getImages(); // 商品图片 if (!TextUtils.isEmpty(images)) { String[] strings = images.split("\\|"); if (strings.length > 0) { Glide.with(context) .load(StringUtils.https2Http(strings[0])) .into(holder.imgProduct); } }

holder.txtProductName.setText(product.getTitle()); holder.txtSinglePriice.setText(String.valueOf(product.getPrice()));

holder.advProduct.setNum(product.getNum()); // 加减器添加点击事件 holder.advProduct.setOnAddDecreaseClickListener(new AddDecreaseView.OnAddDecreaseClickListener() { @Override public void add(int num) { product.setNum(num);

if (productListener != null) { productListener.onChange(position, num); } }

@Override public void decrease(int num) { product.setNum(num); if (productListener != null) { productListener.onChange(position, num); } } });

// 商品的复选框 holder.cbProduct.setOnCheckedChangeListener(null); holder.cbProduct.setChecked(product.isChecked()); holder.cbProduct.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { product.setChecked(isChecked); if (productClickListener != null) { productClickListener.onProductClick(position, isChecked); } } });

}

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

class ViewHolder extends RecyclerView.ViewHolder { private CheckBox cbProduct; private ImageView imgProduct; private TextView txtProductName; private TextView txtSinglePriice; private AddDecreaseView advProduct;

public ViewHolder(View itemView) { super(itemView); cbProduct = itemView.findViewById(R.id.cb_product); imgProduct = itemView.findViewById(R.id.img_product); txtSinglePriice = itemView.findViewById(R.id.txt_single_price); advProduct = itemView.findViewById(R.id.adv_product); txtProductName = itemView.findViewById(R.id.txt_product_name); } } }

//另一个Adapter

package com.bwie.cart1023.adapter;

import android.content.Context; import android.support.annotation.NonNull; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.view.View; import android.view.ViewGroup; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.TextView;

import com.bwie.cart1023.R; import com.bwie.cart1023.bean.Product; import com.bwie.cart1023.bean.Shopper;

import java.util.List;

/** * Created by eric on 2018/10/23. */

public class ShopperAdapter extends RecyclerView.Adapter<ShopperAdapter.ViewHolder> { private Context context; private List<Shopper<List<Product>>> list;

public ShopperAdapter(Context context, List<Shopper<List<Product>>> list) { this.context = context; this.list = list; }

// 一级列表（商家）发生变化的接口 public interface OnShopperClickListener { void onShopperClick(int position, boolean isCheck); }

private OnShopperClickListener shopperClickListener;

public void setOnShopperClickListener(OnShopperClickListener listener) { this.shopperClickListener = listener; }

// 二级列表的加减器监听 private ProductAdapter.OnAddDecreaseProductListener productListener;

public void setOnAddDecreaseProductListener(ProductAdapter.OnAddDecreaseProductListener listener) { this.productListener = listener; }

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

@Override public void onBindViewHolder(@NonNull final ViewHolder holder, final int position) { final Shopper<List<Product>> shopper = list.get(position); holder.txtShopperName.setText(shopper.getSellerName());

// 产品的列表 RecyclerView.LayoutManager pLayoutManager = new LinearLayoutManager(context); holder.rvProduct.setLayoutManager(pLayoutManager); final ProductAdapter adapter = new ProductAdapter(context, shopper.getList()); // 给二级列表添加一个加减器的监听 if (productListener != null) { adapter.setOnAddDecreaseProductListener(productListener); } // 二级条目（商品）复选框点击事件 adapter.setOnProductClickListener(new ProductAdapter.OnProductClickListener() { @Override public void onProductClick(int position, boolean isChecked) { // 当前商品未选中，商家也就未选中 if (!isChecked) { shopper.setChecked(false); // 只要是当前条目未选中，全选复选框也就没选中 shopperClickListener.onShopperClick(position, false); } else { // 当前商品如果选中，需要遍历商家所有的商品是否选中 // 循环遍历之前先设置一个true标志位，只要有一条商品没有被选中，商家也就选中，标志位变成false boolean isAllProductSelected = true; for (Product product : shopper.getList()) { if (!product.isChecked()) { isAllProductSelected = false; break; } } shopper.setChecked(isAllProductSelected); // 当前商品选中时，需要循环遍历所有的商家是否被选中来确认外部全选复选框的状态 shopperClickListener.onShopperClick(position, true); } // 数据发生变化之后刷新适配器 notifyDataSetChanged(); productListener.onChange(0, 0); } });

holder.rvProduct.setAdapter(adapter);

// 先取消掉之前的点击变化监听 holder.cbSHopper.setOnCheckedChangeListener(null);

// 设置好初始化的状态 holder.cbSHopper.setChecked(shopper.isChecked());

// 等设置完初始化状态之后再设置我们自己的监听 // 商家列表中的复选框 holder.cbSHopper.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { shopper.setChecked(isChecked);

// 1.商家被选中的时候，子类所有的商品应该被选中 // if (isChecked) { List<Product> productList = shopper.getList(); for (Product product : productList) { product.setChecked(isChecked); } // 子类商品的适配器刷新 adapter.notifyDataSetChanged(); // } // 当点击一级条目的时候，外部的全选按钮状态发生变化 if (shopperClickListener != null) { shopperClickListener.onShopperClick(position, isChecked); } } }); }

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

class ViewHolder extends RecyclerView.ViewHolder { private CheckBox cbSHopper; private TextView txtShopperName; private RecyclerView rvProduct;

public ViewHolder(View itemView) { super(itemView); cbSHopper = itemView.findViewById(R.id.cb_shopper); txtShopperName = itemView.findViewById(R.id.txt_shopper_name); rvProduct = itemView.findViewById(R.id.rv_product); } } }

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