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Rxjava+Retrofit+MVP实现购物车功能

转载 作者：qq735679552 更新时间：2022-09-27 22:32:09 27 4
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本文实例为大家分享了rxjava retrofit实现购物车的具体代码，供大家参考，具体内容如下 。

效果图:

Rxjava+Retrofit+MVP实现购物车功能

Rxjava+Retrofit+MVP实现购物车功能

1.依赖 。

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annotationprocessor 'com.jakewharton:butterknife-compiler:8.8.1'
  compile 'com.jakewharton:butterknife:8.8.1'
  compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'
  compile 'com.squareup.retrofit2:retrofit:2.3.0'
  compile 'com.squareup.retrofit2:converter-gson:2.3.0'
  compile 'com.facebook.fresco:fresco:0.12.0'
  compile 'com.facebook.fresco:animated-base-support:0.12.0'
  compile 'com.facebook.fresco:animated-webp:0.12.0'
  compile 'com.facebook.fresco:webpsupport:0.12.0'
  compile 'io.reactivex.rxjava2:rxjava:2.1.7'
  compile 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'
  compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
  compile 'com.squareup.okhttp3:okhttp:3.9.0'
  compile 'com.google.code.gson:gson:2.8.1'

2.布局 。

1.加减器布局   layout_add_delete 。

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<?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= "match_parent"
  android:orientation= "horizontal"
  android:weightsum= "1" >
 
  <textview
  android:id= "@+id/txt_delete"
  android:layout_width= "30dp"
  android:layout_height= "30dp"
  android:text= "减"
  android:gravity= "center"
  android:background= "#8b948b" />
 
  <edittext
  android:id= "@+id/et_number"
  android:layout_margintop= "2dp"
  android:layout_width= "50dp"
  android:layout_height= "30dp"
  android:background= "@drawable/edit"
  android:layout_weight= "0.00"
  android:gravity= "center"
  android:text= "1" />
  <textview
  android:id= "@+id/txt_add"
  android:layout_width= "30dp"
  android:layout_height= "30dp"
  android:text= "加"
  android:gravity= "center"
  android:background= "#8b948b" />
 
 
</linearlayout>

2. 商品详情布局   activity_main 。

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<?xml version= "1.0" encoding= "utf-8" ?>
<relativelayout xmlns:android= "http://schemas.android.com/apk/res/android"
  xmlns:fresco= "http://schemas.android.com/apk/res-auto"
  android:layout_width= "match_parent"
  android:layout_height= "match_parent" >
 
 
  <linearlayout
  android:layout_width= "match_parent"
  android:layout_height= "match_parent"
  android:orientation= "vertical" >
 
  <com.facebook.drawee.view.simpledraweeview
   android:id= "@+id/my_image_view"
   android:layout_width= "match_parent"
   android:layout_height= "450dp"
   fresco:placeholderimage= "@mipmap/ic_launcher" />
 
  <textview
   android:id= "@+id/goods_title"
   android:layout_width= "wrap_content"
   android:layout_height= "wrap_content"
   android:layout_margin= "10dp"
   android:text= "a啊啊是你的"
   android:textsize= "20dp" />
 
  <textview
   android:id= "@+id/goods_price"
   android:layout_width= "wrap_content"
   android:layout_height= "wrap_content"
   android:layout_margin= "10dp"
   android:text= "￥ 18132"
   android:textcolor= "#dc5f2e"
   android:textsize= "18dp" />
 
  <textview
   android:layout_width= "wrap_content"
   android:layout_height= "wrap_content"
   android:layout_margin= "10dp"
   android:text= "我是商家19"
   android:textsize= "16dp" />
 
 
  </linearlayout>
 
  <linearlayout
  android:layout_alignparentbottom= "true"
  android:layout_width= "match_parent"
  android:layout_height= "50dp"
  android:orientation= "horizontal" >
 
  <button
   android:id= "@+id/btn_addcart"
   android:layout_weight= "1"
   android:layout_width= "0dp"
   android:layout_height= "match_parent"
   android:background= "#ffc207"
   android:text= "加入购物车" />
 
  <button
   android:id= "@+id/btn_shopping"
   android:layout_weight= "1"
   android:layout_width= "0dp"
   android:layout_height= "match_parent"
   android:background= "#ff6b06"
   android:text= "立即购买" />
 
  </linearlayout>
 
 
</relativelayout>

3.购物车布局 activity_main2 。

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<?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= "match_parent"
  android:orientation= "vertical" >
 
  <!--头布局-->
  <linearlayout
  android:id= "@+id/top_bar"
  android:layout_width= "match_parent"
  android:layout_height= "48dp"
  android:background= "#f7f7f7"
  android:orientation= "vertical" >
 
  <relativelayout
   android:layout_width= "match_parent"
   android:layout_height= "48dp"
   android:background= "@android:color/transparent"
   android:orientation= "vertical" >
 
   <imageview
   android:id= "@+id/back"
   android:layout_width= "48dp"
   android:layout_height= "48dp"
   android:layout_alignparentleft= "true"
   android:layout_gravity= "center_vertical"
   android:padding= "12dp"
   android:src= "@drawable/back" />
 
   <textview
   android:layout_width= "match_parent"
   android:layout_height= "wrap_content"
   android:gravity= "center"
   android:minheight= "48dp"
   android:text= "购物车"
   android:textcolor= "#1a1a1a"
   android:textsize= "16sp" />
 
   <textview
   android:id= "@+id/edit"
   android:layout_width= "wrap_content"
   android:layout_height= "wrap_content"
   android:layout_alignparentright= "true"
   android:layout_marginright= "40dp"
   android:gravity= "center"
   android:minheight= "48dp"
   android:text= "编辑"
   android:textcolor= "#1a1a1a"
   android:textsize= "14sp"
   android:visibility= "visible" />
  </relativelayout>
  </linearlayout>
 
  <expandablelistview
  android:id= "@+id/exlistview"
  android:layout_width= "match_parent"
  android:layout_height= "0dp"
  android:layout_weight= "1"
  android:childindicator= "@null"
  android:groupindicator= "@null" >
  </expandablelistview>
 
  <linearlayout
  android:layout_width= "match_parent"
  android:layout_height= "50dp"
  android:gravity= "center_vertical"
  android:orientation= "horizontal" >
 
  <checkbox
   android:id= "@+id/all_chekbox"
   android:layout_marginleft= "20dp"
   android:layout_width= "wrap_content"
   android:layout_height= "wrap_content" />
  <textview
   android:layout_width= "wrap_content"
   android:layout_height= "wrap_content"
   android:text= "全选" />
  <linearlayout
   android:id= "@+id/ll_info"
   android:layout_width= "0dp"
   android:layout_height= "wrap_content"
   android:layout_weight= "4"
   >
   <linearlayout
   android:layout_width= "match_parent"
   android:layout_height= "wrap_content"
   android:orientation= "vertical"
   android:layout_marginright= "20dp"
   android:layout_weight= "1"
   >
   <linearlayout
    android:layout_width= "match_parent"
    android:layout_height= "wrap_content"
    android:orientation= "horizontal"
    android:gravity= "right"
    >
    <textview
    android:layout_width= "wrap_content"
    android:layout_height= "wrap_content"
    android:layout_marginleft= "5dp"
    android:text= "合计:"
    android:textsize= "18sp"
    android:textstyle= "bold" />
 
    <textview
    android:id= "@+id/total_price"
    android:layout_width= "wrap_content"
    android:layout_height= "wrap_content"
    android:text= "￥0.00"
    android:textcolor= "#f23232"
    android:textsize= "16sp"
    android:textstyle= "bold" />
   </linearlayout>
   <textview
    android:id= "@+id/total_number"
    android:layout_width= "match_parent"
    android:layout_height= "wrap_content"
    android:text= "共有商品:0件"
    android:gravity= "right"
    android:textsize= "16sp"
    android:textstyle= "bold" />
   </linearlayout>
   <textview
   android:id= "@+id/tv_go_to_pay"
   android:layout_width= "match_parent"
   android:layout_height= "match_parent"
   android:layout_weight= "3"
   android:background= "#fd7a05"
   android:clickable= "true"
   android:gravity= "center"
   android:text= "结算"
   android:textcolor= "#fafafa"
 
   />
   <textview
   android:id= "@+id/tv_go_to_del"
   android:layout_width= "match_parent"
   android:layout_height= "match_parent"
   android:layout_weight= "3"
   android:background= "#e2231c"
   android:clickable= "true"
   android:gravity= "center"
   android:text= "删除"
   android:textcolor= "#fafafa"
   android:visibility= "gone"
   />
  </linearlayout>
 
  </linearlayout>
</linearlayout>

4.二级列表组级布局 ex_group_item 。

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<?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= "match_parent"
  android:background= "#cfc3c3"
  android:orientation= "horizontal" >
 
  <checkbox
  android:id= "@+id/group_checkbox"
  android:layout_marginleft= "20dp"
  android:layout_width= "wrap_content"
  android:layout_height= "wrap_content"
  android:focusable= "false" />
 
  <textview
  android:id= "@+id/shop_name"
  android:layout_marginleft= "20dp"
  android:layout_width= "wrap_content"
  android:layout_height= "wrap_content"
  android:textsize= "16dp" />
 
</linearlayout>

5.二级列表子布局  ex_child_item 。

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<?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:fresco= "http://schemas.android.com/apk/res-auto"
  android:layout_width= "match_parent"
  android:layout_height= "230dp"
  android:orientation= "horizontal" >
 
  <checkbox
  android:id= "@+id/child_checkbox"
  android:layout_margintop= "50dp"
  android:layout_marginleft= "20dp"
  android:layout_marginbottom= "50dp"
  android:layout_width= "wrap_content"
  android:layout_height= "wrap_content"
  />
 
  <relativelayout
  android:layout_marginleft= "20dp"
  android:layout_width= "match_parent"
  android:layout_height= "match_parent" >
 
  <textview
   android:id= "@+id/shop_title"
   android:layout_width= "wrap_content"
   android:layout_height= "wrap_content"
   android:layout_alignparentleft= "true"
   android:layout_alignparentstart= "true"
   android:layout_marginleft= "17dp"
   android:layout_marginstart= "17dp"
   android:text= "textview"
   android:layout_alignparenttop= "true" />
 
  <!--<imageview
   android:id= "@+id/shop_img"
   android:layout_width= "90dp"
   android:layout_height= "90dp"
   android:layout_margintop= "30dp"
   app:srccompat= "@mipmap/ic_launcher"
   android:layout_below= "@+id/shop_name"
   android:layout_alignparentleft= "true"
   android:layout_alignparentstart= "true" />-->
  <com.facebook.drawee.view.simpledraweeview
   android:id= "@+id/shop_img"
   android:layout_width= "90dp"
   android:layout_height= "90dp"
   android:layout_margintop= "30dp"
   fresco:placeholderimage= "@mipmap/ic_launcher"
   android:layout_below= "@+id/shop_name"
   android:layout_alignparentleft= "true"
   android:layout_alignparentstart= "true"
   />
 
  <textview
   android:id= "@+id/shop_price"
   android:layout_width= "wrap_content"
   android:layout_height= "wrap_content"
   android:layout_aligntop= "@+id/shop_img"
   android:layout_centerhorizontal= "true"
   android:layout_margintop= "10dp"
   android:text= "￥20"
   android:textcolor= "#f23232" />
 
  <com.bwei.gepeng.myview.adddeleteview
   android:id= "@+id/adv"
   android:layout_width= "160dp"
   android:layout_height= "30dp"
   android:layout_below= "@+id/shop_price"
   android:layout_margintop= "30dp"
   android:layout_marginleft= "140dp"
   app:left_text= "-"
   app:right_text= "+"
   app:middle_text= "1"
   android:focusable= "false"
   >
  </com.bwei.gepeng.myview.adddeleteview>
 
  <button
   android:id= "@+id/shop_delete"
   android:layout_width= "wrap_content"
   android:layout_height= "wrap_content"
   android:layout_alignparentend= "true"
   android:layout_alignparentright= "true"
   android:layout_centervertical= "true"
   android:visibility= "invisible"
   android:text= "删除" />
  </relativelayout>
 
 
</linearlayout>

3.实体类 。

1. messagebean 。

  。

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package com.bwei.gepeng.entity;
 
public class messagebean <t>{
 
 
  private string code;
  private t data;
  private string msg;
  private sellerbean seller;
 
  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;
  }
 
  public string getmsg() {
  return msg;
  }
 
  public void setmsg(string msg) {
  this .msg = msg;
  }
 
  public sellerbean getseller() {
  return seller;
  }
 
  public void setseller(sellerbean seller) {
  this .seller = seller;
  }
 
 
 
  public static class sellerbean {
  /**
   * description : 我是商家19
   * icon : http://120.27.23.105/images/icon.png
   * name : 商家19
   * productnums : 999
   * score : 5.0
   * sellerid : 19
   */
 
  private string description;
  private string icon;
  private string name;
  private int productnums;
  private double score;
  private int sellerid;
 
  public string getdescription() {
   return description;
  }
 
  public void setdescription(string description) {
   this .description = description;
  }
 
  public string geticon() {
   return icon;
  }
 
  public void seticon(string icon) {
   this .icon = icon;
  }
 
  public string getname() {
   return name;
  }
 
  public void setname(string name) {
   this .name = name;
  }
 
  public int getproductnums() {
   return productnums;
  }
 
  public void setproductnums( int productnums) {
   this .productnums = productnums;
  }
 
  public double getscore() {
   return score;
  }
 
  public void setscore( double score) {
   this .score = score;
  }
 
  public int getsellerid() {
   return sellerid;
  }
 
  public void setsellerid( int sellerid) {
   this .sellerid = sellerid;
  }
  }
}

2.goodsshowbean 。

package com.bwei.gepeng.entity; public class goodsshowbean { 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; } 。

3. cartbean 。

  。

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package com.bwei.gepeng.entity;
 
import java.util.list;
 
public class cartbean {
  private string sellername;
  private string sellerid;
  private list<listbean> list;
 
  public string getsellername() {
  return sellername;
  }
 
  public void setsellername(string sellername) {
  this .sellername = sellername;
  }
 
  public string getsellerid() {
  return sellerid;
  }
 
  public void setsellerid(string sellerid) {
  this .sellerid = sellerid;
  }
 
  public list<listbean> getlist() {
  return list;
  }
 
  public void setlist(list<listbean> list) {
  this .list = list;
  }
 
  public static class listbean {
 
  private double bargainprice;
  private string createtime;
  private string detailurl;
  private string images;
  private int num;
  private int pid;
  private double price;
  private int pscid;
  private int selected;
  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 getnum() {
   return num;
  }
 
  public void setnum( int num) {
   this .num = num;
  }
 
  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 getselected() {
   return selected;
  }
 
  public void setselected( int selected) {
   this .selected = selected;
  }
 
  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;
  }
  }
 
  @override
  public string tostring() {
  return "cartbean{" +
   "sellername='" + sellername + ' '' +
   ", sellerid='" + sellerid + ' '' +
   ", list=" + list +
   '}' ;
  }
}

4. groupbean 。

  。

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package com.bwei.gepeng.entity;
 
public class groupbean {
  private string sellername;
  private boolean gropucb;
 
  public groupbean(string sellername, boolean gropucb) {
  this .sellername = sellername;
  this .gropucb = gropucb;
  }
 
  public string getsellername() {
  return sellername;
  }
 
  public void setsellername(string sellername) {
  this .sellername = sellername;
  }
 
  public boolean isgropucb() {
  return gropucb;
  }
 
  public void setgropucb( boolean gropucb) {
  this .gropucb = gropucb;
  }
 
  @override
  public string tostring() {
  return "groupbean{" +
   "sellername='" + sellername + ' '' +
   ", gropucb=" + gropucb +
   '}' ;
  }
}

5.childbean 。

  。

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package com.bwei.gepeng.entity;
 
public class childbean {
  private string title;
  private string images;
  private double price;
  private int num;
  private boolean childcb;
  private boolean btn;
  private int pid;
 
 
  public childbean(string title, string images, double price, int num, boolean childcb, boolean btn, int pid) {
  this .title = title;
  this .images = images;
  this .price = price;
  this .num = num;
  this .childcb = childcb;
  this .btn = btn;
  this .pid = pid;
  }
 
  public int getpid() {
  return pid;
  }
 
  public void setpid( int pid) {
  this .pid = pid;
  }
 
  public boolean isbtn() {
  return btn;
  }
 
  public void setbtn( boolean btn) {
  this .btn = btn;
  }
 
 
  public string gettitle() {
  return title;
  }
 
  public void settitle(string title) {
  this .title = title;
  }
 
  public string getimages() {
  return images;
  }
 
  public void setimages(string images) {
  this .images = images;
  }
 
  public double getprice() {
  return price;
  }
 
  public void setprice( double price) {
  this .price = price;
  }
 
  public int getnum() {
  return num;
  }
 
  public void setnum( int num) {
  this .num = num;
  }
 
  public boolean ischildcb() {
  return childcb;
  }
 
  public void setchildcb( boolean childcb) {
  this .childcb = childcb;
  }
 
  @override
  public string tostring() {
  return "childbean{" +
   "title='" + title + ' '' +
   ", images='" + images + ' '' +
   ", price=" + price +
   ", num=" + num +
   ", childcb=" + childcb +
   ", btn=" + btn +
   ", pid=" + pid +
   '}' ;
  }
}

4.接口 。

1.apiservice 。

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package com.bwei.gepeng.http;
 
 
import com.bwei.gepeng.entity.cartbean;
import com.bwei.gepeng.entity.goodsshowbean;
import com.bwei.gepeng.entity.messagebean;
 
import java.util.list;
import java.util.map;
 
import io.reactivex.flowable;
import retrofit2.http.get;
import retrofit2.http.querymap;
 
public interface apiservice {
  //查询商品详情75
  //http://120.27.23.105/product/getproductdetail?pid=75&source=android
  @get ( "product/getproductdetail" )
  flowable<messagebean<goodsshowbean>> getnews( @querymap map<string,string> map);
 
  //查询购物车
  //http://120.27.23.105/product/getcarts?uid=3802&source=android
  @get ( "product/getcarts" )
  flowable<messagebean<list<cartbean>>> getcart( @querymap map<string,string> map);
 
 
  //删除购物车
  //http://120.27.23.105/product/getcarts?uid=3802&source=android
  @get ( "product/deletecart" )
  flowable<messagebean<list<cartbean>>> getdel( @querymap map<string,string> map);
 
  //添加购物车
  //http://120.27.23.105/product/addcart?uid=3802&pid=75&source=android
  @get ( "product/addcart" )
  flowable<messagebean<list<cartbean>>> getadd( @querymap map<string,string> map);
}
2 .iview
[java] view plain copy
public interface iview {
  void onsuccess(object o,string tag);
  void onfailed(exception e,string tag);
}
3 .ipresenter
[java] view plain copy
import java.util.map;
 
public interface ipresenter {
  void getdata(map<string,string> map, string tag);
}
4 .imodel
[java] view plain copy
import java.util.map;
 
public interface imodel {
  void getdata(map<string,string> map,string tag);
}

5.代码 。

1.自定义view 加减器 adddeleteview 。

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package com.bwei.gepeng.myview;
 
import android.content.context;
import android.content.res.typedarray;
import android.graphics.color;
import android.util.attributeset;
import android.view.view;
import android.widget.edittext;
import android.widget.linearlayout;
import android.widget.textview;
 
import com.bwei.gepeng.r;
 
public class adddeleteview extends linearlayout {
  private onadddelclicklistener listener;
  private edittext etnumber;
 
  //对外提供一个点击的回调接口
  public interface onadddelclicklistener{
  void onaddclick(view v);
  void ondelclick(view v);
  }
 
  public void setonadddelclicklistener(onadddelclicklistener listener){
  if (listener!= null ){
   this .listener=listener;
  }
  }
 
  public adddeleteview(context context) {
  this (context, null );
  }
 
  public adddeleteview(context context, attributeset attrs) {
  this (context, attrs, 0 );
  }
 
  public adddeleteview(context context, attributeset attrs, int defstyleattr) {
  super (context, attrs, defstyleattr);
  initview(context, attrs, defstyleattr);
  }
 
  private void initview(context context, attributeset attrs, int defstyleattr) {
  view.inflate(context, r.layout.layout_add_delete, this );
 
  //获取控件
  textview txtdelete=findviewbyid(r.id.txt_delete);
  textview txtadd=findviewbyid(r.id.txt_add);
  etnumber = findviewbyid(r.id.et_number);
 
 
  typedarray typedarray = context.obtainstyledattributes(attrs, r.styleable.adddeleteviewstyle);
 
  string lefttext = typedarray.getstring(r.styleable.adddeleteviewstyle_left_text);
  string righttext = typedarray.getstring(r.styleable.adddeleteviewstyle_right_text);
  string middletext = typedarray.getstring(r.styleable.adddeleteviewstyle_middle_text);
  int color = typedarray.getcolor(r.styleable.adddeleteviewstyle_left_text_color, color.red);
 
  txtdelete.settext(lefttext);
  txtadd.settext(righttext);
  etnumber.settext(middletext);
  txtdelete.settextcolor(color);
 
  //回收
  typedarray.recycle();
 
 
  txtdelete.setonclicklistener( new onclicklistener() {
   @override
   public void onclick(view view) {
   listener.ondelclick(view);
   }
  });
 
  txtadd.setonclicklistener( new onclicklistener() {
   @override
   public void onclick(view view) {
   listener.onaddclick(view);
   }
  });
 
  }
  //对外提供一个修改数字的方法
  public void setnumber( int number){
  if (number> 0 ){
   etnumber.settext(number+ "" );
  }
  }
  //对外提供一个获取当前数字的方法
  public int getnumber(){
  string string = etnumber.gettext().tostring();
  int i = integer.parseint(string);
  return i;
  }
 
}

2.retrofit工具类 retrofitutils 。

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package com.bwei.gepeng.http;
 
import java.io.ioexception;
 
import okhttp3.httpurl;
import okhttp3.interceptor;
import okhttp3.okhttpclient;
import okhttp3.request;
import okhttp3.response;
import retrofit2.retrofit;
import retrofit2.adapter.rxjava2.rxjava2calladapterfactory;
import retrofit2.converter.gson.gsonconverterfactory;
 
public class retrofitutils {
  private static volatile retrofitutils instance;
  private final retrofit retrofit;
 
  private retrofitutils(){
  okhttpclient client = new okhttpclient.builder().addinterceptor( new logger()).build();
 
  retrofit = new retrofit.builder()
   .client(client)
   .addcalladapterfactory(rxjava2calladapterfactory.create())
   .addconverterfactory(gsonconverterfactory.create())
   .baseurl( "http://120.27.23.105/" )
   .build();
  }
 
  public static retrofitutils getinstance(){
  if (instance== null ){
   synchronized (retrofitutils. class ){
   if (instance== null ){
    instance= new retrofitutils();
   }
   }
  }
  return instance;
  }
 
  public apiservice getapiservice(){
  apiservice apiservice = retrofit.create(apiservice. class );
  return apiservice;
  }
 
  class logger implements interceptor {
  @override
  public response intercept(chain chain) throws ioexception {
   request original = chain.request();
   httpurl url=original.url().newbuilder()
    .addqueryparameter( "source" , "android" )
    .build();
   //添加请求头
   request request = original.newbuilder()
    .url(url)
    .build();
   return chain.proceed(request);
  }
  }
}

3.m层 。

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package com.bwei.gepeng.model;
 
import com.bwei.gepeng.entity.cartbean;
import com.bwei.gepeng.entity.goodsshowbean;
import com.bwei.gepeng.entity.messagebean;
import com.bwei.gepeng.http.retrofitutils;
import com.bwei.gepeng.presenter.newspresenter;
 
import java.util.list;
import java.util.map;
 
import io.reactivex.flowable;
 
public class model implements imodel{
 
  private newspresenter presenter;
  public model(newspresenter presenter) {
  this .presenter = presenter;
  }
 
  @override
  public void getdata(map<string, string> map, string tag) {
  if (tag.equals( "cart" )){
   flowable<messagebean<list<cartbean>>> flowable = retrofitutils.getinstance().getapiservice().getcart(map);
   presenter.get2(flowable,tag);
  } else if (tag.equals( "goods" )){
   flowable<messagebean<goodsshowbean>> flowable = retrofitutils.getinstance().getapiservice().getnews(map);
   presenter.get(flowable,tag);
  } else if (tag.equals( "del" )){
   flowable<messagebean<list<cartbean>>> flowable = retrofitutils.getinstance().getapiservice().getdel(map);
   presenter.get3(flowable,tag);
  } else if (tag.equals( "add" )){
   flowable<messagebean<list<cartbean>>> flowable = retrofitutils.getinstance().getapiservice().getadd(map);
   presenter.get4(flowable,tag);
  }
 
  }
}

4.p层 。

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package com.bwei.gepeng.presenter;
 
import com.bwei.gepeng.entity.cartbean;
import com.bwei.gepeng.entity.goodsshowbean;
import com.bwei.gepeng.entity.messagebean;
import com.bwei.gepeng.model.model;
import com.bwei.gepeng.view.iview;
 
import java.util.list;
import java.util.map;
 
import io.reactivex.flowable;
import io.reactivex.android.schedulers.androidschedulers;
import io.reactivex.schedulers.schedulers;
import io.reactivex.subscribers.disposablesubscriber;
 
public class newspresenter implements ipresenter{
 
  private iview iview;
  private disposablesubscriber<messagebean<goodsshowbean>> subscriber;
  private disposablesubscriber<messagebean<list<cartbean>>> subscriber2;
  private disposablesubscriber<messagebean<list<cartbean>>> subscriber3;
  private disposablesubscriber<messagebean<list<cartbean>>> subscriber4;
 
  public void attachview(iview iview){
  this .iview=iview;
  }
 
  @override
  public void getdata(map<string, string> map, string tag) {
  model model = new model( this );
  model.getdata(map,tag);
  }
 
  public void detachview(){
  if (iview!= null ){
   iview= null ;
  }
  if (subscriber!= null ){
   if (!subscriber.isdisposed()){
   subscriber.dispose();
   }
  }
  if (subscriber2!= null ){
   if (!subscriber2.isdisposed()){
   subscriber2.dispose();
   }
  }
  if (subscriber3!= null ){
   if (!subscriber3.isdisposed()){
   subscriber3.dispose();
   }
  }
  if (subscriber4!= null ){
   if (!subscriber4.isdisposed()){
   subscriber4.dispose();
   }
  }
  }
 
  //查询购物车
  public void get(flowable<messagebean<goodsshowbean>> flowable , final string tag) {
  subscriber = flowable.subscribeon(schedulers.io())
   .observeon(androidschedulers.mainthread())
   .subscribewith( new disposablesubscriber<messagebean<goodsshowbean>>() {
    @override
    public void onnext(messagebean<goodsshowbean> listmessagebean) {
    if (listmessagebean != null ) {
     goodsshowbean data = listmessagebean.getdata();
     iview.onsuccess(data,tag);
    }
    }
 
    @override
    public void onerror(throwable t) {
    iview.onfailed( new exception(t),tag);
    }
 
    @override
    public void oncomplete() {
 
    }
   });
  }
 
  //查询商品详情75
  public void get2(flowable<messagebean<list<cartbean>>> flowable, final string tag) {
  subscriber2 = flowable.subscribeon(schedulers.io())
   .observeon(androidschedulers.mainthread())
   .subscribewith( new disposablesubscriber<messagebean<list<cartbean>>>() {
    @override
    public void onnext(messagebean<list<cartbean>> list) {
    if (list != null ) {
     list<cartbean> data = list.getdata();
     if (data!= null ){
     iview.onsuccess(data,tag);
     }
    }
    }
 
    @override
    public void onerror(throwable t) {
    iview.onfailed( new exception(t),tag);
    }
 
    @override
    public void oncomplete() {
 
    }
   });
  }
 
  //删除购物车
  public void get3(flowable<messagebean<list<cartbean>>> flowable, final string tag) {
  subscriber3 = flowable.subscribeon(schedulers.io())
   .observeon(androidschedulers.mainthread())
   .subscribewith( new disposablesubscriber<messagebean<list<cartbean>>>() {
    @override
    public void onnext(messagebean<list<cartbean>> list) {
    if (list != null ) {
     string code = list.getmsg();
     iview.onsuccess(code,tag);
    }
    }
 
    @override
    public void onerror(throwable t) {
    iview.onfailed( new exception(t),tag);
    }
 
    @override
    public void oncomplete() {
 
    }
   });
  }
 
  //添加购物车
  public void get4(flowable<messagebean<list<cartbean>>> flowable, final string tag) {
  subscriber4 = flowable.subscribeon(schedulers.io())
   .observeon(androidschedulers.mainthread())
   .subscribewith( new disposablesubscriber<messagebean<list<cartbean>>>() {
    @override
    public void onnext(messagebean<list<cartbean>> list) {
    if (list != null ) {
     string code = list.getmsg();
     iview.onsuccess(code,tag);
    }
    }
 
    @override
    public void onerror(throwable t) {
    iview.onfailed( new exception(t),tag);
    }
 
    @override
    public void oncomplete() {
 
    }
   });
  }
}

5.mainactivity 商品详情页面 。

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package com.bwei.gepeng.view;
 
import android.content.intent;
import android.os.bundle;
import android.support.v7.app.appcompatactivity;
import android.view.view;
import android.widget.textview;
import android.widget.toast;
 
import com.bwei.gepeng.r;
import com.bwei.gepeng.entity.goodsshowbean;
import com.bwei.gepeng.presenter.newspresenter;
import com.facebook.drawee.view.simpledraweeview;
 
import java.util.hashmap;
import java.util.map;
 
import butterknife.bindview;
import butterknife.butterknife;
import butterknife.onclick;
 
public class mainactivity extends appcompatactivity implements iview {
 
  @bindview (r.id.my_image_view)
  simpledraweeview myimageview;
  @bindview (r.id.goods_title)
  textview goodstitle;
  @bindview (r.id.goods_price)
  textview goodsprice;
  private newspresenter presenter;
 
  @override
  protected void oncreate(bundle savedinstancestate) {
  super .oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main);
  butterknife.bind( this );
 
  presenter = new newspresenter();
  presenter.attachview( this );
  //http://120.27.23.105/product/getproductdetail?pid=75&source=android
  map<string, string> map = new hashmap<>();
  map.put( "pid" , "75" );
  presenter.getdata(map, "goods" );
  
  }
 
  @override
  public void onsuccess(object o, string tag) {
  if (tag.equals( "goods" )) {
   if (o != null ) {
   goodsshowbean data = (goodsshowbean) o;
   //log.e("gp", "onsuccess: " + data.tostring());
 
   myimageview.setimageuri(data.getimages().split( "|" )[ 0 ]);
   goodstitle.settext(data.gettitle());
   goodsprice.settext( "￥ " +data.getprice());
   }
  } else if (tag.equals( "add" )){
   if (o != null ) {
   string msg = (string) o;
   toast.maketext(mainactivity. this , msg, toast.length_short).show();
   }
  }
  }
 
  @override
  public void onfailed(exception e, string tag) {
 
  }
 
  @onclick ({r.id.btn_addcart, r.id.btn_shopping})
  public void onviewclicked(view view) {
  switch (view.getid()) {
   case r.id.btn_addcart:
   map<string, string> map = new hashmap<>();
   map.put( "uid" , "3802" );
   map.put( "pid" , "75" );
   presenter.getdata(map, "add" );
   //toast.maketext(mainactivity.this,"添加成功",toast.length_short).show();
   break ;
   case r.id.btn_shopping:
   intent intent= new intent(mainactivity. this ,main2activity. class );
   startactivity(intent);
   break ;
  }
  }
}

6.二级列表适配器 expandableadapter 。

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package com.bwei.gepeng.adapter;
 
import android.content.context;
import android.view.view;
import android.view.viewgroup;
import android.widget.baseexpandablelistadapter;
import android.widget.button;
import android.widget.checkbox;
import android.widget.textview;
import android.widget.toast;
 
import com.bwei.gepeng.r;
import com.bwei.gepeng.entity.childbean;
import com.bwei.gepeng.entity.groupbean;
import com.bwei.gepeng.myview.adddeleteview;
import com.bwei.gepeng.view.main2activity;
import com.facebook.drawee.view.simpledraweeview;
 
import java.util.arraylist;
import java.util.list;
 
 
public class expandableadapter extends baseexpandablelistadapter {
  private context context;
  private list<groupbean> groupbeen= new arraylist<>();
  private list<list<childbean>> childbeen= new arraylist<>();
 
  private main2activity main;
 
  public expandableadapter(context context, list<groupbean> groupbeen, list<list<childbean>> childbeen) {
  this .context = context;
  this .groupbeen = groupbeen;
  this .childbeen = childbeen;
  this .main = (main2activity) context;
  }
  //接口回调
  private ondeletegoods ondlegoods;
 
  public interface ondeletegoods{
  void ondelgoods( int i, int i1,string pid);
  }
 
  public void setondeletegoods(ondeletegoods ondlegoods){
  this .ondlegoods=ondlegoods;
  }
 
  @override
  public int getgroupcount() {
  return groupbeen.size();
  }
 
  @override
  public int getchildrencount( int i) {
  return childbeen.get(i).size();
  }
 
  @override
  public object getgroup( int i) {
  return groupbeen.get(i).getsellername();
  }
 
  @override
  public object getchild( int i, int i1) {
  return childbeen.get(i).get(i1).gettitle();
  }
 
  @override
  public long getgroupid( int i) {
  return i;
  }
 
  @override
  public long getchildid( int i, int i1) {
  return i1;
  }
 
  @override
  public boolean hasstableids() {
  return false ;
  }
 
  //一级组
  @override
  public view getgroupview( final int i, boolean b, view view, viewgroup viewgroup) {
  //加载视图
  view=view.inflate(context, r.layout.ex_group_item , null );
 
  final checkbox groupcb= view.findviewbyid(r.id.group_checkbox);
  textview shopname= view.findviewbyid(r.id.shop_name);
 
 
  shopname.settext(groupbeen.get(i).getsellername());
  groupcb.setchecked(groupbeen.get(i).isgropucb());
 
  //组复选按钮
  groupcb.setonclicklistener( new view.onclicklistener() {
   @override
   public void onclick(view view) {
   boolean gchecked = groupcb.ischecked();
   groupbeen.get(i).setgropucb(gchecked);
   //main2activity main= (main2activity) context;
   for (groupbean i: groupbeen){
    boolean gropucb = i.isgropucb();
    if (!gropucb){
    main.allcheckbox.setchecked( false );
    break ;
    } else {
    main.allcheckbox.setchecked( true );
    }
   }
   int size = childbeen.get(i).size();
   if (gchecked){
    for ( int r= 0 ;r<size;r++){
    //toast.maketext(context,"group按钮"+ gchecked+""+size, toast.length_short).show();
    childbeen.get(i).get(r).setchildcb( true );
    }
   } else {
    for ( int r= 0 ;r<size;r++){
    //toast.maketext(context,"group按钮"+ gchecked+""+size, toast.length_short).show();
    childbeen.get(i).get(r).setchildcb( false );
    }
   }
   notifydatasetchanged();
   main.changesum(childbeen);
   }
  });
  return view;
  }
 
  //二级组
  @override
  public view getchildview( final int i, final int i1, boolean b, view v, viewgroup viewgroup) {
  //加载视图
  v=view.inflate(context, r.layout.ex_child_item , null );
 
  final checkbox childcb = v.findviewbyid(r.id.child_checkbox);
  textview shoptitle= v.findviewbyid(r.id.shop_title);
  textview shopprice= v.findviewbyid(r.id.shop_price);
  //imageview shopimg=v.findviewbyid(r.id.shop_img);
  //draweeview.setimageuri(uri);
  simpledraweeview shopimg = v.findviewbyid(r.id.shop_img);
  final adddeleteview adv = v.findviewbyid(r.id.adv);
  button shop_delete=v.findviewbyid(r.id.shop_delete);
 
  childcb.setchecked(childbeen.get(i).get(i1).ischildcb());
  string images = childbeen.get(i).get(i1).getimages();
  //glide.with(context).load(images).into(shopimg);
  shopimg.setimageuri(images);
  shoptitle.settext(childbeen.get(i).get(i1).gettitle());
  shopprice.settext(childbeen.get(i).get(i1).getprice()+ "" );
  adv.setnumber(childbeen.get(i).get(i1).getnum());
 
  //final main2activity main= (main2activity) context;
  //控制删除按钮的显隐
  if (childbeen.get(i).get(i1).isbtn()){
   shop_delete.setvisibility(view.visible);
  } else {
   shop_delete.setvisibility(view.invisible);
  }
  //删除按钮监听
  shop_delete.setonclicklistener( new view.onclicklistener() {
   @override
   public void onclick(view view) {
 
   ondlegoods.ondelgoods(i,i1,childbeen.get(i).get(i1).getpid()+ "" );
   }
  });
 
  //加减器逻辑
  adv.setonadddelclicklistener( new adddeleteview.onadddelclicklistener() {
   @override
   public void onaddclick(view v) {
   int number = adv.getnumber();
   number++;
   adv.setnumber(number);
   childbeen.get(i).get(i1).setnum(number);
   main.changesum(childbeen);
   }
 
   @override
   public void ondelclick(view v) {
   int number = adv.getnumber();
   if (number== 1 ){
    toast.maketext(context, "用户最小数量为1" ,toast.length_short).show();
   }
   number--;
   adv.setnumber(number);
   childbeen.get(i).get(i1).setnum(number);
   main.changesum(childbeen);
   }
  });
 
  //二级组的复选框监听
  childcb.setonclicklistener( new view.onclicklistener() {
   @override
   public void onclick(view view) {
   boolean flag= false ;
   boolean cchecked = childcb.ischecked();
   childbeen.get(i).get(i1).setchildcb(cchecked);
   //toast.maketext(context,"child按钮"+ cchecked+""+i1, toast.length_short).show();
   // main2activity main= (main2activity) context;
   for (list<childbean> i1:childbeen){
    for ( int r= 0 ;r<i1.size();r++) {
    boolean childcb1 = i1.get(r).ischildcb();
    if (!childcb1){
     main.allcheckbox.setchecked( false );
     groupbeen.get(i).setgropucb( false );
     flag= true ;
     break ;
    } else {
     main.allcheckbox.setchecked( true );
     groupbeen.get(i).setgropucb( true );
    }
    }
    if (flag){
    break ;
    }
   }
 
   int size = childbeen.get(i).size();
   for ( int x= 0 ;x<size;x++) {
    boolean childcb1 = childbeen.get(i).get(x).ischildcb();
    if (!childcb1){
    groupbeen.get(i).setgropucb( false );
    break ;
    } else {
    groupbeen.get(i).setgropucb( true );
    }
   }
   notifydatasetchanged();
   main.changesum(childbeen);
   }
  });
 
 
  return v;
  }
 
  @override
  public boolean ischildselectable( int i, int i1) {
  return false ;
  }
}

7.购物车页面逻辑 main2activity 。

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package com.bwei.gepeng.view;
 
import android.os.bundle;
import android.support.v7.app.appcompatactivity;
import android.view.view;
import android.widget.checkbox;
import android.widget.expandablelistview;
import android.widget.textview;
 
import com.bwei.gepeng.r;
import com.bwei.gepeng.adapter.expandableadapter;
import com.bwei.gepeng.entity.cartbean;
import com.bwei.gepeng.entity.childbean;
import com.bwei.gepeng.entity.groupbean;
import com.bwei.gepeng.presenter.newspresenter;
 
import java.util.arraylist;
import java.util.hashmap;
import java.util.list;
import java.util.map;
 
import butterknife.bindview;
import butterknife.butterknife;
import butterknife.onclick;
 
public class main2activity extends appcompatactivity implements iview {
 
  @bindview (r.id.exlistview)
  expandablelistview exlistview;
  @bindview (r.id.all_chekbox)
  public checkbox allcheckbox;
  @bindview (r.id.total_price)
  textview totalprice;
  @bindview (r.id.total_number)
  textview totalnumber;
  @bindview (r.id.tv_go_to_pay)
  textview tvgotopay;
  @bindview (r.id.tv_go_to_del)
  textview tvgotodel;
 
  private expandableadapter expandableadapter;
 
  private boolean flagedit = true ;
  private boolean flagdel = false ;
 
 
  private newspresenter presenter;
 
  list<groupbean> groupbeen = new arraylist<>();
  list<list<childbean>> childbeen = new arraylist<>();
 
  int i;
  int i1;
 
  @override
  protected void oncreate(bundle savedinstancestate) {
  super .oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main2);
  butterknife.bind( this );
 
  //获取二级列表适配器
  expandableadapter = new expandableadapter(main2activity. this , groupbeen, childbeen);
  exlistview.setadapter(expandableadapter);
 
  exlistview.setongroupclicklistener( new expandablelistview.ongroupclicklistener() {
   @override
   public boolean ongroupclick(expandablelistview expandablelistview, view view, int i, long l) {
   return true ;
   }
  });
 
 
  presenter = new newspresenter();
  presenter.attachview( this );
  //http://120.27.23.105/product/getcarts?uid=3802&source=android
  map<string, string> map = new hashmap<>();
  map.put( "uid" , "3802" );
  presenter.getdata(map, "cart" );
 
 
  expandableadapter.setondeletegoods( new expandableadapter.ondeletegoods() {
   @override
   public void ondelgoods( int i, int i1, string pid) {
   main2activity. this .i = i;
   main2activity. this .i1 = i1;
 
   map<string, string> map = new hashmap<>();
   map.put( "uid" , "3802" );
   map.put( "pid" , pid);
   presenter.getdata(map, "del" );
 
   }
  });
 
  }
 
 
  @override
  public void onsuccess(object o, string tag) {
  if (tag.equals( "cart" )) {
   if (o != null ) {
   list<cartbean> data = (list<cartbean>) o;
   for (cartbean i : data) {
    groupbean groupbean = new groupbean(i.getsellername(), false );
    this .groupbeen.add(groupbean);
    list<cartbean.listbean> list = i.getlist();
    list<childbean> ls = new arraylist<>();
    for (cartbean.listbean w : list) {
    string[] split = w.getimages().split( "|" );
    childbean childbean = new childbean(w.gettitle(), split[ 0 ], w.getprice(), 1 , false , false , w.getpid());
    ls.add(childbean);
    }
    this .childbeen.add(ls);
 
   }
   for ( int i = 0 ; i < expandableadapter.getgroupcount(); i++) {
    exlistview.expandgroup(i);
   }
   }
  } else if (tag.equals( "del" )) {
   if (o != null ) {
   string msg = (string) o;
 
   if ( this .i != - 1 && this .i1 != - 1 ) {
    int size = childbeen.get(i).size();
    if (size == 1 ) {
    childbeen.remove(i);
    groupbeen.remove(i);
    } else {
    childbeen.get(i).remove(i1);
    }
   
    changesum(childbeen);
 
    this .i = - 1 ;
    this .i1 = - 1 ;
    if (flagdel){
    delgoods();
    }
   }
   }
  }
  expandableadapter.notifydatasetchanged();
  }
 
  @override
  public void onfailed(exception e, string tag) {
  
  }
 
  @onclick ({r.id.back, r.id.edit, r.id.all_chekbox,r.id.tv_go_to_del})
  public void onviewclicked(view view) {
  switch (view.getid()) {
   case r.id.back:
   finish();
   break ;
   case r.id.edit:
   if (flagedit){
    tvgotopay.setvisibility(view.gone);
    tvgotodel.setvisibility(view.visible);
   } else {
    tvgotopay.setvisibility(view.visible);
    tvgotodel.setvisibility(view.gone);
   }
 
   for (list<childbean> i1 : childbeen) {
    for ( int r = 0 ; r < i1.size(); r++) {
    i1.get(r).setbtn(flagedit);
    }
   }
   flagedit = !flagedit;
   expandableadapter.notifydatasetchanged();
   break ;
   case r.id.all_chekbox:
   boolean checked = allcheckbox.ischecked();
   //改变一级item复选框
   for (groupbean i : groupbeen) {
    i.setgropucb(checked);
   }
   //改变二级item复选框
   for (list<childbean> i1 : childbeen) {
    for ( int r = 0 ; r < i1.size(); r++) {
    i1.get(r).setchildcb(checked);
    }
   }
   expandableadapter.notifydatasetchanged();
   changesum(childbeen);
   break ;
   case r.id.tv_go_to_del:
   if (childbeen.size()!= 0 ){
    for (list<childbean> i1 : childbeen) {
    for ( int r = 0 ; r < i1.size(); r++) {
     boolean childcb1 = i1.get(r).ischildcb();
     if (childcb1) {
     flagdel= true ;
     delgoods();
     if (allcheckbox.ischecked()){
      allcheckbox.setchecked( false );
     }
     break ;
     }
    }
    if (flagdel){
     break ;
    }
    }
   }
   //toast.maketext(main2activity.this,flagdel+"",toast.length_short).show();
   break ;
  }
  }
 
  //递归删除
  private void delgoods(){
  boolean flag= false ;
  for ( int p= 0 ;p<childbeen.size();p++) {
   for ( int r = 0 ; r < childbeen.get(p).size(); r++) {
   boolean childcb1 = childbeen.get(p).get(r).ischildcb();
   if (p==childbeen.size()- 1 &&r==childbeen.get(p).size()- 1 ){
    flagdel= false ;
   }
   if (childcb1) {
    int pid = childbeen.get(p).get(r).getpid();
    this .i = p;
    this .i1 = r;
    map<string, string> map = new hashmap<>();
    map.put( "uid" , "3802" );
    map.put( "pid" , pid+ "" );
    presenter.getdata(map, "del" );
    flag=!flag;
    break ;
   }
   }
   if (flag){
   break ;
   }
  }
  }
 
  //计算和数量总价
  public void changesum(list<list<childbean>> childbeen) {
  int count = 0 ;
  double sum = 0 ;
  for (list<childbean> i1 : childbeen) {
   for ( int r = 0 ; r < i1.size(); r++) {
   boolean childcb1 = i1.get(r).ischildcb();
   if (childcb1) {
    double price = i1.get(r).getprice();
    int num = i1.get(r).getnum();
    sum += price * num;
    count++;
   }
   }
  }
  totalprice.settext( "￥" + sum);
  totalnumber.settext( "共有商品:" + count + "件" );
  }
}

6.附 。

shape图 edit 。

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<?xml version= "1.0" encoding= "utf-8" ?>
<shape xmlns:android= "http://schemas.android.com/apk/res/android" >
  <solid android:color= "#ffffff" />
  <!--<corners android:radius= "3dip" />-->
  <stroke
  android:width= "1dip"
  android:color= "#bdc7d8" />
</shape>

application 初始化fresco 。

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import android.app.application;
import com.facebook.drawee.backends.pipeline.fresco;
 
public class app extends application{
  @override
  public void oncreate() {
  super .oncreate();
  fresco.initialize( this );
  }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我.

原文链接：https://blog.csdn.net/gepeng_66666/article/details/78861647 。

最后此篇关于Rxjava+Retrofit+MVP实现购物车功能的文章就讲到这里了,如果你想了解更多关于Rxjava+Retrofit+MVP实现购物车功能的内容请搜索CFSDN的文章或继续浏览相关文章，希望大家以后支持我的博客！ 。

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