怎么在RxJava中使用Retrofit和Mvp實現購物車

本篇文章為大家展示了怎么在RxJava中使用Retrofit和Mvp實現購物車，內容簡明扼要并且容易理解，絕對能使你眼前一亮，通過這篇文章的詳細介紹希望你能有所收獲。

框架結構： 

1.項目框架：MVP，圖片加載用Fresco，網絡請求用OKhttp+Retrofit實現（自己封裝，加單例模式），
2.完成購物車數據添加（如果接口無數據，可用接口工具添加數據），
3.自定義view實現加減按鈕，每次點擊加減，item中的總數及總價要做出相應的改變。
4.當數量為1時，點擊減號，數量不變，吐司提示用戶最小數量為1。
5.底部總數及總價為所有item項中的總價及總數，每個item中數量價格的更改，底部總價總數要與之聯動
6.實現單選反選全選功能，首次進入默認全選，item未選中時總數及總價不計入底部數據，改變選中狀態時，底部總數及總價能做出正確修改
7.點擊刪除按鈕，刪除item，底部總數及總價能做出正確修改，接口數據刪除。

添加所需要的依賴和聯網權限

compile 'com.squareup.retrofit2:retrofit:2.0.0-beta4'//Retrofit2所需要的包
compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta4'//ConverterFactory的Gson依賴包
compile 'com.squareup.retrofit2:converter-scalars:2.0.0-beta4'//ConverterFactory的String依賴包
compile 'io.reactivex.rxjava2:rxjava:2.1.3'
compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
compile 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'
compile 'de.greenrobot:eventbus:3.0.0-beta1'
compile 'com.facebook.fresco:fresco:0.11.0'

<uses-permission android:name="android.permission.INTERNET" />

在使用MVP模式前先分包

net包

API

public class API {
 public static String HOST="http://120.27.23.105/product/";
}

ServiceAPI

public interface ServiceAPI {
 @GET("getProductDetail")
 Flowable<XQBean> getXQ(@Query("pid")int pid, @Query("source")String str);
 @GET("addCart")
 Flowable<AddCart> getMsg(@Query("uid")int uid, @Query("pid")int pid, @Query("source")String str);
 @GET("getCarts")
 Flowable<CartBean> getCart(@Query("uid")int uid, @Query("source")String str);
}

成功的接口

public interface OnNetLisenter<T> {
 void Success(T t);
}

Retrofit的封裝

public class RetrofitHepler {
 public static OkHttpClient okHttpClient;
 public static ServiceAPI serViceAPI;
 /**
 * 優先執行
 */
 static {
 getOkHttpClient();
 }
 public static OkHttpClient getOkHttpClient(){
 if(okHttpClient==null){
 synchronized (OkHttpClient.class){
 if(okHttpClient==null){
  okHttpClient=new OkHttpClient();
 }
 }
 }
 return okHttpClient;
 }
 public static ServiceAPI getSerViceAPI(){

 if(serViceAPI==null){
 synchronized (OkHttpClient.class){
 if(serViceAPI==null){
  serViceAPI=onCreate(ServiceAPI.class,API.HOST);
 }
 }
 }
 return serViceAPI;
 }
 public static <T> T onCreate(Class<T>tClass,String url){
 Retrofit retrofit = new Retrofit.Builder()
 .baseUrl(url)
 .addConverterFactory(GsonConverterFactory.create())
 .client(okHttpClient)
 .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
 //.addCallAdapterFactory(RxJava2CallAdapterFactory.create())
 .build();
 return retrofit.create(tClass);
 }
}

bean包

詳情頁的Bean類

public class XQBean {
 /**
 * msg :
 * seller : {"description":"我是商家2","icon":"http://120.27.23.105/images/icon.png","name":"商家2","productNums":999,"score":5,"sellerid":2}
 * code : 0
 * data : {"bargainPrice":111.99,"createtime":"2017-10-14T21:48:08","detailUrl":"https://item.m.jd.com/product/4719303.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t9004/210/1160833155/647627/ad6be059/59b4f4e1N9a2b1532.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7504/338/63721388/491286/f5957f53/598e95f1N7f2adb87.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7441/10/64242474/419246/adb30a7d/598e95fbNd989ba0a.jpg!q70.jpg","itemtype":2,"pid":9,"price":78.99,"pscid":1,"salenum":2356,"sellerid":2,"subhead":"每個中秋都不能簡單，無論身在何處，你總需要一塊餅讓生活更圓滿，京東月餅讓愛更圓滿京東自營，閃電配送，更多驚喜，快用手指戳一下","title":"北京稻香村 稻香村中秋節月餅 老北京月餅禮盒655g"}
 */

 private String msg;
 private SellerBean seller;
 private String code;
 private DataBean 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 String getCode() {
 return code;
 }

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

 public DataBean getData() {
 return data;
 }

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

 public static class SellerBean {
 /**
 * description : 我是商家2
 * icon : http://120.27.23.105/images/icon.png
 * name : 商家2
 * productNums : 999
 * score : 5.0
 * sellerid : 2
 */

 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;
 }
 }

 public static class DataBean {
 /**
 * bargainPrice : 111.99
 * createtime : 2017-10-14T21:48:08
 * detailUrl : https://item.m.jd.com/product/4719303.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends
 * images : https://m.360buyimg.com/n0/jfs/t9004/210/1160833155/647627/ad6be059/59b4f4e1N9a2b1532.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7504/338/63721388/491286/f5957f53/598e95f1N7f2adb87.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7441/10/64242474/419246/adb30a7d/598e95fbNd989ba0a.jpg!q70.jpg
 * itemtype : 2
 * pid : 9
 * price : 78.99
 * pscid : 1
 * salenum : 2356
 * sellerid : 2
 * subhead : 每個中秋都不能簡單，無論身在何處，你總需要一塊餅讓生活更圓滿，京東月餅讓愛更圓滿京東自營，閃電配送，更多驚喜，快用手指戳一下
 * title : 北京稻香村 稻香村中秋節月餅 老北京月餅禮盒655g
 */

 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;
 }
 }
}

加入購物車的Bean

public class AddCart {
 private String msg;
 private String code;

 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;
 }
}

商品類

public class CartBean {
 /**
 * msg : 請求成功
 * code : 0
 * data : [{"list":[{"bargainPrice":22.9,"createtime":"2017-10-14T21:48:08","detailUrl":"https://item.m.jd.com/product/2542855.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t1930/284/2865629620/390243/e3ade9c4/56f0a08fNbd3a1235.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t2137/336/2802996626/155915/e5e90d7a/56f0a09cN33e01bd0.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t1882/31/2772215910/389956/c8dbf370/56f0a0a2Na0c86ea6.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t2620/166/2703833710/312660/531aa913/57709035N33857877.jpg!q70.jpg","num":1,"pid":24,"price":288,"pscid":2,"selected":0,"sellerid":1,"subhead":"三只松鼠零食特惠，專區滿99減50，滿199減100，火速搶購》","title":"三只松鼠 堅果炒貨 零食奶油味 碧根果225g/袋"},{"bargainPrice":11800,"createtime":"2017-10-10T17:33:37","detailUrl":"https://item.m.jd.com/product/4338107.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t6700/155/2098998076/156185/6cf95035/595dd5a5Nc3a7dab5.jpg!q70.jpg","num":2,"pid":57,"price":5199,"pscid":40,"selected":0,"sellerid":1,"subhead":"【i5 MX150 2G顯存】全高清窄邊框 8G內存 256固態硬盤 支持指紋識別 預裝WIN10系統","title":"小米(MI)Air 13.3英寸全金屬輕薄筆記本(i5-7200U 8G 256G PCle SSD MX150 2G獨顯 FHD 指紋識別 Win10）銀\r\n"},{"bargainPrice":99,"createtime":"2017-10-14T21:38:26","detailUrl":"https://item.m.jd.com/product/4345173.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t6037/35/2944615848/95178/6cd6cff0/594a3a10Na4ec7f39.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t6607/258/1025744923/75738/da120a2d/594a3a12Ne3e6bc56.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t6370/292/1057025420/64655/f87644e3/594a3a12N5b900606.jpg!q70.jpg","num":1,"pid":45,"price":2999,"pscid":39,"selected":0,"sellerid":1,"subhead":"高清雙攝，就是清晰！2000+1600萬高清攝像頭，6GB大內存+高通驍龍835處理器，性能怪獸！","title":"一加手機5 (A5000) 6GB+64GB 月巖灰 全網通 雙卡雙待 移動聯通電信4G手機"}],"sellerName":"商家1","sellerid":"1"},{"list":[{"bargainPrice":6666,"createtime":"2017-10-10T16:01:31","detailUrl":"https://item.m.jd.com/product/5089273.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t8284/363/1326459580/71585/6d3e8013/59b857f2N6ca75622.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t9346/182/1406837243/282106/68af5b54/59b8480aNe8af7f5c.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t8434/54/1359766007/56140/579509d9/59b85801Nfea207db.jpg!q70.jpg","num":1,"pid":46,"price":234,"pscid":39,"selected":0,"sellerid":2,"subhead":"【iPhone新品上市】新一代iPhone，讓智能看起來更不一樣","title":"Apple iPhone 8 Plus (A1864) 64GB 金色 移動聯通電信4G手機"}],"sellerName":"商家2","sellerid":"2"},{"list":[{"bargainPrice":111.99,"createtime":"2017-10-03T23:43:53","detailUrl":"https://item.m.jd.com/product/4719303.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t9004/210/1160833155/647627/ad6be059/59b4f4e1N9a2b1532.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7504/338/63721388/491286/f5957f53/598e95f1N7f2adb87.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7441/10/64242474/419246/adb30a7d/598e95fbNd989ba0a.jpg!q70.jpg","num":5,"pid":12,"price":256,"pscid":1,"selected":0,"sellerid":5,"subhead":"每個中秋都不能簡單，無論身在何處，你總需要一塊餅讓生活更圓滿，京東月餅讓愛更圓滿京東自營，閃電配送，更多驚喜，快用手指戳一下","title":"北京稻香村 稻香村中秋節月餅 老北京月餅禮盒655g"}],"sellerName":"商家5","sellerid":"5"},{"list":[{"bargainPrice":11800,"createtime":"2017-10-03T23:53:28","detailUrl":"https://mitem.jd.hk/ware/view.action?wareId=1988853309&cachekey=1acb07a701ece8d2434a6ae7fa6870a1","images":"https://m.360buyimg.com/n0/jfs/t6130/97/1370670410/180682/1109582a/593276b1Nd81fe723.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5815/178/2614671118/51656/7f52d137/593276c7N107b725a.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5878/60/2557817477/30873/4502b606/593276caN5a7d6357.jpg!q70.jpg","num":1,"pid":62,"price":15999,"pscid":40,"selected":0,"sellerid":6,"subhead":"購買電腦辦公部分商品滿1元返火車票5元優惠券（返完即止）","title":"全球購 新款Apple MacBook Pro 蘋果筆記本電腦 銀色VP2新13英寸Bar i5/8G/256G"}],"sellerName":"商家6","sellerid":"6"},{"list":[{"bargainPrice":399,"createtime":"2017-10-03T23:53:28","detailUrl":"https://item.m.jd.com/product/1439822107.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t5887/201/859509257/69994/6bde9bf6/59224c24Ne854e14c.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5641/233/853609022/57374/5c73d281/59224c24N3324d5f4.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5641/233/853609022/57374/5c73d281/59224c24N3324d5f4.jpg!q70.jpg","num":1,"pid":86,"price":777,"pscid":85,"selected":0,"sellerid":7,"subhead":"滿2件，總價打6.50折","title":"Gap男裝 休閑舒適簡約水洗五袋直筒長褲緊身牛仔褲941825 深灰色 33/32(175/84A)"}],"sellerName":"商家7","sellerid":"7"},{"list":[{"bargainPrice":111.99,"createtime":"2017-10-14T21:39:05","detailUrl":"https://item.m.jd.com/product/4719303.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t9004/210/1160833155/647627/ad6be059/59b4f4e1N9a2b1532.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7504/338/63721388/491286/f5957f53/598e95f1N7f2adb87.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7441/10/64242474/419246/adb30a7d/598e95fbNd989ba0a.jpg!q70.jpg","num":12,"pid":1,"price":118,"pscid":1,"selected":0,"sellerid":17,"subhead":"每個中秋都不能簡單，無論身在何處，你總需要一塊餅讓生活更圓滿，京東月餅讓愛更圓滿京東自營，閃電配送，更多驚喜，快用手指戳一下","title":"北京稻香村 稻香村中秋節月餅 老北京月餅禮盒655g"}],"sellerName":"商家17","sellerid":"17"},{"list":[{"bargainPrice":111.99,"createtime":"2017-10-14T21:39:05","detailUrl":"https://item.m.jd.com/product/4719303.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t9004/210/1160833155/647627/ad6be059/59b4f4e1N9a2b1532.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7504/338/63721388/491286/f5957f53/598e95f1N7f2adb87.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7441/10/64242474/419246/adb30a7d/598e95fbNd989ba0a.jpg!q70.jpg","num":4,"pid":2,"price":299,"pscid":1,"selected":0,"sellerid":18,"subhead":"每個中秋都不能簡單，無論身在何處，你總需要一塊餅讓生活更圓滿，京東月餅讓愛更圓滿京東自營，閃電配送，更多驚喜，快用手指戳一下","title":"北京稻香村 稻香村中秋節月餅 老北京月餅禮盒655g"}],"sellerName":"商家18","sellerid":"18"},{"list":[{"bargainPrice":11800,"createtime":"2017-10-03T23:53:28","detailUrl":"https://mitem.jd.hk/ware/view.action?wareId=1988853309&cachekey=1acb07a701ece8d2434a6ae7fa6870a1","images":"https://m.360buyimg.com/n0/jfs/t6130/97/1370670410/180682/1109582a/593276b1Nd81fe723.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7Nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5815/178/2614671118/51656/7f52d137/593276c7N107b725a.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5878/60/2557817477/30873/4502b606/593276caN5a7d6357.jpg!q70.jpg","num":1,"pid":76,"price":37999.99,"pscid":40,"selected":0,"sellerid":20,"subhead":"購買電腦辦公部分商品滿1元返火車票5元優惠券（返完即止）","title":"全球購 新款Apple MacBook Pro 蘋果筆記本電腦 銀色VP2新13英寸Bar i5/8G/256G"}],"sellerName":"商家20","sellerid":"20"},{"list":[{"bargainPrice":111.99,"createtime":"2017-10-14T21:39:05","detailUrl":"https://item.m.jd.com/product/4719303.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t9004/210/1160833155/647627/ad6be059/59b4f4e1N9a2b1532.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7504/338/63721388/491286/f5957f53/598e95f1N7f2adb87.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7441/10/64242474/419246/adb30a7d/598e95fbNd989ba0a.jpg!q70.jpg","num":1,"pid":5,"price":88.99,"pscid":1,"selected":0,"sellerid":21,"subhead":"每個中秋都不能簡單，無論身在何處，你總需要一塊餅讓生活更圓滿，京東月餅讓愛更圓滿京東自營，閃電配送，更多驚喜，快用手指戳一下","title":"北京稻香村 稻香村中秋節月餅 老北京月餅禮盒655g"}],"sellerName":"商家21","sellerid":"21"}]
 */

 private String msg;
 private String code;
 private List<DataBean> 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 List<DataBean> getData() {
 return data;
 }

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

 public static class DataBean {
 /**
 * list : [{"bargainPrice":22.9,"createtime":"2017-10-14T21:48:08","detailUrl":"https://item.m.jd.com/product/2542855.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t1930/284/2865629620/390243/e3ade9c4/56f0a08fNbd3a1235.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t2137/336/2802996626/155915/e5e90d7a/56f0a09cN33e01bd0.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t1882/31/2772215910/389956/c8dbf370/56f0a0a2Na0c86ea6.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t2620/166/2703833710/312660/531aa913/57709035N33857877.jpg!q70.jpg","num":1,"pid":24,"price":288,"pscid":2,"selected":0,"sellerid":1,"subhead":"三只松鼠零食特惠，專區滿99減50，滿199減100，火速搶購》","title":"三只松鼠 堅果炒貨 零食奶油味 碧根果225g/袋"},{"bargainPrice":11800,"createtime":"2017-10-10T17:33:37","detailUrl":"https://item.m.jd.com/product/4338107.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t6700/155/2098998076/156185/6cf95035/595dd5a5Nc3a7dab5.jpg!q70.jpg","num":2,"pid":57,"price":5199,"pscid":40,"selected":0,"sellerid":1,"subhead":"【i5 MX150 2G顯存】全高清窄邊框 8G內存 256固態硬盤 支持指紋識別 預裝WIN10系統","title":"小米(MI)Air 13.3英寸全金屬輕薄筆記本(i5-7200U 8G 256G PCle SSD MX150 2G獨顯 FHD 指紋識別 Win10）銀\r\n"},{"bargainPrice":99,"createtime":"2017-10-14T21:38:26","detailUrl":"https://item.m.jd.com/product/4345173.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=QQfriends","images":"https://m.360buyimg.com/n0/jfs/t6037/35/2944615848/95178/6cd6cff0/594a3a10Na4ec7f39.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t6607/258/1025744923/75738/da120a2d/594a3a12Ne3e6bc56.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t6370/292/1057025420/64655/f87644e3/594a3a12N5b900606.jpg!q70.jpg","num":1,"pid":45,"price":2999,"pscid":39,"selected":0,"sellerid":1,"subhead":"高清雙攝，就是清晰！2000+1600萬高清攝像頭，6GB大內存+高通驍龍835處理器，性能怪獸！","title":"一加手機5 (A5000) 6GB+64GB 月巖灰 全網通 雙卡雙待 移動聯通電信4G手機"}]
 * sellerName : 商家1
 * sellerid : 1
 */

 private String sellerName;
 private String sellerid;
 private List<ListBean> list;

 private boolean check;

 public boolean isCheck() {
 return check;
 }

 public void setCheck(boolean check) {
 this.check = check;
 }
 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 {
 /**
 * bargainPrice : 22.9
 * createtime : 2017-10-14T21:48:08
 * detailUrl : https://item.m.jd.com/product/2542855.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=QQfriends
 * images : https://m.360buyimg.com/n0/jfs/t1930/284/2865629620/390243/e3ade9c4/56f0a08fNbd3a1235.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t2137/336/2802996626/155915/e5e90d7a/56f0a09cN33e01bd0.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t1882/31/2772215910/389956/c8dbf370/56f0a0a2Na0c86ea6.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t2620/166/2703833710/312660/531aa913/57709035N33857877.jpg!q70.jpg
 * num : 1
 * pid : 24
 * price : 288.0
 * pscid : 2
 * selected : 0
 * sellerid : 1
 * subhead : 三只松鼠零食特惠，專區滿99減50，滿199減100，火速搶購》
 * title : 三只松鼠 堅果炒貨 零食奶油味 碧根果225g/袋
 */

 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;
 private int cou=1;

 public int getCou() {
 return cou;
 }

 public void setCou(int cou) {
 this.cou = cou;
 }

 private boolean check;

 public boolean isCheck() {
 return check;
 }

 public void setCheck(boolean check) {
 this.check = check;
 }

 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;
 }
 }
 }
}

app

public class MyApp extends Application{
 @Override
 public void onCreate() {
 super.onCreate();

 Fresco.initialize(this);
 }
}

view層

先寫兩個接口

public interface ICart {
 void showlist(List<CartBean.DataBean> grouplist, List<List<CartBean.DataBean.ListBean>> childlist);
}

public interface IView<T> {
 void showBean(T t);
 void showStr(String s);
}

主頁面布局

<?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="com.bwie.zhangzhen20170108.MainActivity">

 <ExpandableListView
 android:id="@+id/elv"
 android:layout_weight="1"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content" />
 <LinearLayout
 android:layout_weight="9"
 android:orientation="horizontal"
 android:layout_width="match_parent"
 android:layout_height="match_parent">
 <CheckBox
 android:id="@+id/quanxuan"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content" />
 <TextView
 android:text="全選"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content" />
 <LinearLayout
 android:layout_marginLeft="50dp"
 android:orientation="vertical"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content">
 <TextView
 android:id="@+id/zongjia"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="總價：0.0"
 />
 <TextView
 android:text="共0件商品"
 android:id="@+id/tv_count"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content" />

 </LinearLayout>
 <TextView
 android:text="去結算"
 android:background="#FFD82020"
 android:layout_marginLeft="100dp"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content" />
 </LinearLayout>

</LinearLayout>

主頁面

public class MainActivity extends AppCompatActivity implements ICart {

 private ExpandableListView mElv;
 private CheckBox mQuanxuan;
 private TextView mZongjia;
 private TextView mTvCount;
 private MyExpandableAdapter myExpandableAdapter;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

 initView();
 new CartPresenter(this).getCart();
 EventBus.getDefault().register(this);
 mQuanxuan.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 myExpandableAdapter.qx(mQuanxuan.isChecked());
 }
 });
 }

 private void initView() {
 mElv = (ExpandableListView) findViewById(R.id.elv);
 mQuanxuan = (CheckBox) findViewById(R.id.quanxuan);
 mZongjia = (TextView) findViewById(R.id.zongjia);
 mTvCount = (TextView) findViewById(R.id.tv_count);
 }

 @Override
 public void showlist(List<CartBean.DataBean> grouplist, List<List<CartBean.DataBean.ListBean>> childlist) {
 myExpandableAdapter = new MyExpandableAdapter(grouplist, this,childlist);
 mElv.setAdapter(myExpandableAdapter);
 for (int i = 0; i <grouplist.size() ; i++) {
 mElv.expandGroup(i);
 }
 }

 //接收傳過來的值
 @Subscribe
 public void onPriceAndCount(CountAndPrice cp){


 mZongjia.setText("共"+cp.getCount()+"件商品");
 mTvCount.setText("總計："+cp.getPrice());

 }
 //接收傳過來的值
 @Subscribe
 public void onPriceAndCount1(MessgeEvent event){
 //改變全選的狀態
 mQuanxuan.setChecked(event.isCheck());
 }
 @Override
 protected void onDestroy() {
 super.onDestroy();
 EventBus.getDefault().unregister(this);
 }
}

第二個頁面布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical"
 android:id="@+id/activity_add"
 tools:context="com.bwie.zhangzhen20170108.AddActivity">

 <com.facebook.drawee.view.SimpleDraweeView
 android:layout_width="300dp"
 android:id="@+id/xqsdv1"
 android:layout_gravity="center"
 android:layout_height="300dp" />
 <TextView
 android:id="@+id/tvtitle1"
 android:layout_width="match_parent"
 android:layout_height="wrap_content" />
 <LinearLayout
 android:orientation="horizontal"
 android:layout_width="match_parent"
 android:layout_height="wrap_content">
 <Button
 android:id="@+id/tiaozhuan1"
 android:layout_weight="1"
 android:text="跳轉到購物車"
 android:layout_width="match_parent"
 android:layout_height="wrap_content" />
 <Button
 android:id="@+id/tianjia1"
 android:layout_weight="1"
 android:text="添加到購物車"
 android:layout_width="match_parent"
 android:layout_height="wrap_content" />
 </LinearLayout>
</LinearLayout>

實現購物車的代碼

public class AddActivity extends AppCompatActivity implements View.OnClickListener,IView {

 private SimpleDraweeView mXqsdv;
 private TextView mTvtitle;
 private Button mTiaozhuan;
 private Button mTianjia;
 private LinearLayout mAddActivity;
 private XQPresenter xqPresenter;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_add);

 initView();
 xqPresenter=new XQPresenter(this);
 xqPresenter.getXQ();
 }

 private void initView() {
 mXqsdv = (SimpleDraweeView) findViewById(R.id.xqsdv1);
 mTvtitle = (TextView) findViewById(R.id.tvtitle1);
 mTiaozhuan = (Button) findViewById(R.id.tiaozhuan1);
 mTiaozhuan.setOnClickListener(this);
 mTianjia = (Button) findViewById(R.id.tianjia1);
 mTianjia.setOnClickListener(this);
 mAddActivity = (LinearLayout) findViewById(R.id.activity_add);
 }

 @Override
 public void onClick(View v) {
 switch (v.getId()) {
 default:
 break;

 //跳到MainActivity （購物車)
 case R.id.tiaozhuan1:
 startActivity(new Intent(this,MainActivity.class));
 break;
 case R.id.tianjia1:
 xqPresenter.getAdd();
 break;
 }
 }

 @Override
 public void showBean(Object o) {
 XQBean xqBean = (XQBean) o;
 XQBean.DataBean data = xqBean.getData();
 String s = data.getImages().split("\\|")[0];
 Uri uri =Uri.parse(s);//地址轉換成URI
 mXqsdv.setImageURI(uri);
 mTvtitle.setText(data.getTitle()+"\n"+data.getPrice());
 }

 @Override
 public void showStr(String s) {
 Toast.makeText(this, s, Toast.LENGTH_SHORT).show();
 }
}

eventbus包

設置一個數量和價格的類

public class CountAndPrice {
 private int count ;
 private int price;

 public int getCount() {
 return count;
 }

 public void setCount(int count) {
 this.count = count;
 }

 public int getPrice() {
 return price;
 }

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

EventBus

public class MessgeEvent {
 private boolean check;

 public boolean isCheck() {
 return check;
 }

 public void setCheck(boolean check) {
 this.check = check;
 }
}

model

實現詳情頁model層的接口

public interface IXQModel {
 public void getXQ(int pid, String str, final OnNetLisenter<XQBean> cgsb);
}

實現詳情頁model

public class XQModel implements IXQModel{

 @Override
 public void getXQ(int pid, String str, final OnNetLisenter<XQBean> onNetLisenter) {
 Flowable<XQBean> flowable = RetrofitHepler.getSerViceAPI().getXQ(pid, str);
 flowable.observeOn(AndroidSchedulers.mainThread())
 .subscribeOn(Schedulers.io())
 .subscribe(new Consumer<XQBean>() {
  @Override
  public void accept(XQBean xqBean) throws Exception {
  onNetLisenter.Success(xqBean);
  }
 });
 }

 public void getAdd(int uid, int pid, String str, final OnNetLisenter<AddCart> onNetLisenter){
 Flowable<AddCart> flowable = RetrofitHepler.getSerViceAPI().getMsg(uid, pid, str);
 flowable.observeOn(AndroidSchedulers.mainThread())
 .subscribeOn(Schedulers.io())
 .subscribe(new Consumer<AddCart>() {
  @Override
  public void accept(AddCart addCart) throws Exception {
  onNetLisenter.Success(addCart);
  }
 });
 }
}

購物車的model

public class CartModel {
 public void getCart(int uid, String str, final OnNetLisenter<CartBean> onNetLisenter){
 Flowable<CartBean> flowable = RetrofitHepler.getSerViceAPI().getCart(uid,str);
 flowable.observeOn(AndroidSchedulers.mainThread())
 .subscribeOn(Schedulers.io())
 .subscribe(new Consumer<CartBean>() {
  @Override
  public void accept(CartBean cartBean) throws Exception {
  onNetLisenter.Success(cartBean);
  }
 });
 }
}

presenter層

詳情頁的P層

public class XQPresenter {
 private final XQModel xqModel;
 private IView iView;
 public XQPresenter(IView iView) {
 xqModel = new XQModel();
 this.iView=iView;
 }
 public void getXQ(){
 xqModel.getXQ(12, "android", new OnNetLisenter<XQBean>() {
 @Override
 public void Success(XQBean xqBean) {
 iView.showBean(xqBean);
 }
 });
 }
 public void getAdd(){
 xqModel.getAdd(3043, 12, "android", new OnNetLisenter<AddCart>() {
 @Override
 public void Success(AddCart addCart) {
 iView.showStr(addCart.getMsg());
 }
 });
 }
}

購物車的P層

public class CartPresenter {
 private ICart iCart;
 private final CartModel cartModel;

 public CartPresenter(ICart iCart) {
 this.iCart = iCart;
 cartModel = new CartModel();

 }
 public void getCart(){
 cartModel.getCart(3043,"android",new OnNetLisenter<CartBean>(){

 @Override
 public void Success(CartBean cartBean) {
 List<CartBean.DataBean> grouplist = cartBean.getData();
 List<List<CartBean.DataBean.ListBean>> childlist = new ArrayList<>();
 for (int i = 0; i < grouplist.size(); i++) {
  CartBean.DataBean dataBean = grouplist.get(i);
  List<CartBean.DataBean.ListBean> list = dataBean.getList();
  childlist.add(list);
 }
 iCart.showlist(grouplist,childlist);
 }
 });
 }
}

adapter

public class MyExpandableAdapter extends BaseExpandableListAdapter {
 private List<CartBean.DataBean> groupdata;
 private Context context;
 private List<List<CartBean.DataBean.ListBean>> childlist;

 public MyExpandableAdapter( List<CartBean.DataBean> groupdata, Context context, List<List<CartBean.DataBean.ListBean>> childlist) {
 this.groupdata = groupdata;
 this.context = context;
 this.childlist = childlist;
 }

 @Override
 public int getGroupCount() {
 return groupdata.size();
 }

 @Override
 public int getChildrenCount(int groupPosition) {
 return childlist.get(groupPosition).size();
 }

 @Override
 public Object getGroup(int groupPosition) {
 return groupdata.get(groupPosition);
 }

 @Override
 public Object getChild(int groupPosition, int childPosition) {
 return null;
 }

 @Override
 public long getGroupId(int groupPosition) {
 return groupPosition;
 }

 @Override
 public long getChildId(int groupPosition, int childPosition) {
 return childPosition;
 }

 @Override
 public boolean hasStableIds() {
 return false;
 }

 @Override
 public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
 final GroupViewHolder holder;
 if (convertView == null) {
 convertView = View.inflate(context, R.layout.group_item, null);
 holder = new GroupViewHolder();
 holder.tv_group = (TextView) convertView.findViewById(R.id.tv_group);
 holder.group_cb = (CheckBox) convertView.findViewById(R.id.gx_group);

 convertView.setTag(holder);
 } else {
 holder = (GroupViewHolder) convertView.getTag();
 }
 final CartBean.DataBean dataBean = groupdata.get(groupPosition);

 String sellerName = dataBean.getSellerName();
 holder.group_cb.setChecked(dataBean.isCheck());
 //點擊一級checkbox的狀態
 holder.group_cb.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 dataBean.setCheck(holder.group_cb.isChecked());
 //改變所有孩子的狀態
 changeChildState(groupPosition,holder.group_cb.isChecked());
 EventBus.getDefault().post(jS());
 //通過判斷一級的checkbox判斷全選的狀態
 changeMianQXstatus(checkGroupAll());
 notifyDataSetChanged();
 }
 });


 return convertView;
 }

 @Override
 public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
 final ChildViewHolder holder;
 if (convertView == null) {
 convertView = View.inflate(context, R.layout.child_item, null);
 holder = new ChildViewHolder();

 holder.tv_title= (TextView) convertView.findViewById(R.id.title);
 holder.price= (TextView) convertView.findViewById(R.id.price);
 holder.child_cb= (CheckBox) convertView.findViewById(R.id.gouxuan_child);
 holder.add= (TextView) convertView.findViewById(R.id.jia);
 holder.del= (TextView) convertView.findViewById(R.id.del);
 holder.jian= (TextView) convertView.findViewById(R.id.jian);
 holder.sdv= (SimpleDraweeView) convertView.findViewById(R.id.title_img);
 holder.tv_num= (TextView) convertView.findViewById(R.id.tv_num);
 holder.yanse= (TextView) convertView.findViewById(R.id.yanse);
 convertView.setTag(holder);
 } else {
 holder = (ChildViewHolder) convertView.getTag();
 }
 final CartBean.DataBean.ListBean listBean = childlist.get(groupPosition).get(childPosition);
 int price = (int) listBean.getPrice();
 holder.child_cb.setChecked(listBean.isCheck());
 holder.price.setText("&yen;："+price+"");
 String title = listBean.getTitle();
 holder.tv_title.setText(title);
 String subhead = listBean.getSubhead();
 String substring = subhead.substring(1, 10)+".....";
 holder.yanse.setText(substring);
 String images = listBean.getImages();
 String[] split = images.split("\\|");
 String s = split[0];
 Uri uri=Uri.parse(s);
 holder.sdv.setImageURI(uri);
 // listBean.setCou(Integer.parseInt(holder.tv_num.getText().toString()));
 //給子條目的checkBox點擊事件
 holder.child_cb.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 listBean.setCheck(holder.child_cb.isChecked());

 EventBus.getDefault().post(jS());
 //如果二級的checkBox選中，就讓一級的checkBox勾選
 if(holder.child_cb.isChecked()) {

  if (ischeckAllchild(groupPosition)) {
  //改變一級checkBox的狀態
  changeGroupstatus(groupPosition,true);
  //通過判斷一級的CheckBox的狀態來改變全選的狀態
  changeMianQXstatus(checkGroupAll());

  }
 }else{
  changeGroupstatus(groupPosition,false);
  changeMianQXstatus(checkGroupAll());
 }
 notifyDataSetChanged();
 }

 });

 //點擊加加的功能
 holder.add.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 int cou = listBean.getCou();
 holder.tv_num.setText(++cou+"");
 listBean.setCou(cou);
 if(holder.child_cb.isChecked()){
  EventBus.getDefault().post(jS());
 }

 }
 });
 //點擊減減的功能
 holder.jian.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 int cou = listBean.getCou();

 if(cou==1) {
  Toast.makeText(context, "最小數量為1", Toast.LENGTH_SHORT).show();
  return;}
 holder.tv_num.setText(--cou+"");
 listBean.setCou(cou);
 if (holder.child_cb.isChecked()) {
  EventBus.getDefault().post(jS());

 }
 }
 });
 //點擊刪除
 holder.del.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 List<CartBean.DataBean.ListBean> listBeen = childlist.get(groupPosition);

 CartBean.DataBean.ListBean remove = listBeen.remove(childPosition);
 if(listBeen.size()==0){
  childlist.remove(childPosition);
  groupdata.remove(groupPosition);
 }
 EventBus.getDefault().post(jS());
 notifyDataSetChanged();

 }
 });

 return convertView;
 }

 @Override
 public boolean isChildSelectable(int groupPosition, int childPosition) {
 return true;
 }

 class GroupViewHolder {
 CheckBox group_cb;
 TextView tv_group;
 }

 class ChildViewHolder {
 CheckBox child_cb;
 TextView tv_title,price,yanse,tv_num;
 TextView del,add,jian;
 SimpleDraweeView sdv;


 }
 /**
 * 判斷全部的二級是CheckBox否選中
 *
 */
 private boolean ischeckAllchild(int g){
 List<CartBean.DataBean.ListBean> listBeen = childlist.get(g);

 for (int i = 0; i <listBeen.size() ; i++) {
 CartBean.DataBean.ListBean listBean = listBeen.get(i);

 if(!listBean.isCheck()){
 return false;
 }
 }
 return true;
 }

 /**
 * 計算數量和價格
 * 通過遍歷一級的得到二級的CheckBox，如果是選擇的選中狀態的話，就統計它們的總計的數量和價格
 */
 private CountAndPrice jS(){
 int cou=0;
 int jiage=0;
 for (int i = 0; i <groupdata.size() ; i++) {
 for (int j = 0; j <childlist.get(i).size() ; j++) {
 CartBean.DataBean.ListBean listBean = childlist.get(i).get(j);
 if(listBean.isCheck()){
  cou+=listBean.getCou();
  jiage+=(int)listBean.getPrice()*listBean.getCou();
 }

 }

 }
 CountAndPrice countAndPrice = new CountAndPrice();
 countAndPrice.setCount(cou);
 countAndPrice.setPrice(jiage);
 return countAndPrice;
 }
 /**
 * 改變一級列表的狀態
 */
 private void changeGroupstatus(int groupPosition,boolean flag ){
 CartBean.DataBean dataBean = groupdata.get(groupPosition);

 dataBean.setCheck(flag);
 }
 /**
 * 改變全選的狀態
 *
 */
 private void changeMianQXstatus(boolean flag){
 MessgeEvent messgeEvent = new MessgeEvent();
 messgeEvent.setCheck(flag);
 EventBus.getDefault().post(messgeEvent);
 }
 /**
 * 判斷一級的是否全部選中
 */
 private boolean checkGroupAll(){
 for (int i = 0; i < groupdata.size(); i++) {
 if(!groupdata.get(i).isCheck()){
 return false;
 }
 }
 return true;
 }
 /**
 * 改變所有孩子的狀態
 */
 private void changeChildState(int grouPistion,boolean flag){
 List<CartBean.DataBean.ListBean> listBeen = childlist.get(grouPistion);
 for (int i = 0; i < listBeen.size(); i++) {
 listBeen.get(i).setCheck(flag);
 }
 }
 /**
 * 改變全選的
 */
 public void qx(boolean flag){
 for (int i = 0; i < groupdata.size(); i++) {
 changeGroupstatus(i, flag);
 changeChildState(i, flag);
 }
 EventBus.getDefault().post(jS());
 notifyDataSetChanged();
 }
}

group_item.xml

<?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">

 <CheckBox
 android:id="@+id/gx_group"
 android:focusable="false"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content" />
 <TextView
 android:id="@+id/tv_group"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content" />
</LinearLayout>

child_item.xml

<?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">

 <TextView
 android:id="@+id/title"
 android:layout_marginLeft="20dp"
 android:layout_width="match_parent"
 android:layout_height="wrap_content" />
 <LinearLayout
 android:orientation="horizontal"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content">
 <CheckBox
 android:layout_marginLeft="20dp"
 android:gravity="center_vertical"
 android:id="@+id/gouxuan_child"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content" />
 <com.facebook.drawee.view.SimpleDraweeView
 android:gravity="center_vertical"
 android:id="@+id/title_img"
 android:layout_width="50dp"
 android:layout_height="50dp" />
 <LinearLayout
 android:orientation="vertical"
 android:layout_marginLeft="30dp"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content">
 <TextView
 android:id="@+id/price"
 android:layout_marginLeft="10dp"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content" />
 <TextView
 android:id="@+id/yanse"
 android:layout_marginLeft="10dp"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content" />
 <LinearLayout
 android:layout_marginLeft="100dp"
 android:orientation="horizontal"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content">
 <TextView
  android:id="@+id/jian"
  android:layout_width="20dp"
  android:layout_height="20dp"
  android:textSize="15sp"
  android:text="一"/>

 <TextView
  android:id="@+id/tv_num"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_marginLeft="5dp"
  android:paddingBottom="2dp"
  android:paddingLeft="20dp"
  android:paddingRight="20dp"
  android:paddingTop="2dp"
  android:text="1" />

 <TextView
  android:id="@+id/jia"
  android:layout_width="20dp"
  android:layout_height="20dp"
  android:layout_marginLeft="5dp"
  android:text="＋"
  android:textSize="15sp"/>
 </LinearLayout>

 </LinearLayout>
 <TextView
 android:id="@+id/del"
 android:layout_marginLeft="20dp"
 android:text="刪除"
 android:textColor="#FFFFFF"
 android:background="#ff3660"
 android:layout_width="32dp"
 android:layout_height="29dp" />
 </LinearLayout>
</LinearLayout>

上述內容就是怎么在RxJava中使用Retrofit和Mvp實現購物車，你們學到知識或技能了嗎？如果還想學到更多技能或者豐富自己的知識儲備，歡迎關注億速云行業資訊頻道。