Rxjava+Retrofit+MVP implements shopping cart function

This article shares the specific code of Rxjava Retrofit implementation shopping cart for everyone's reference. The specific content is as follows

Reproduction image:

1. Dependence

 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: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. Layout

1. Additioner layout layout_add_delete

 <?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="Deduction" 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="plus" android:gravity="center" android:background="#8b948b"/> </LinearLayout>

2. Product Details Layout Activity_main

 <?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="aAhhh it's yours" 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="I am a merchant19" 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="add to shopping cart"/> <Button android:id="@+id/btn_shopping" android:layout_weight="1" android:layout_width="0dp" android:layout_height="match_parent" android:background="#ff6b06" android:text="Buy now"/> </LinearLayout> </RelativeLayout>

3. Shopping cart layout activity_main2

 <?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"> <!--Head Layout--> <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="Shopping Cart" 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="edit" 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="select all"/> <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="total:" 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="total products: 0 pieces" 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="Clear" 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="delete" android:textColor="#FAFAFA" android:visibility="gone" /> </LinearLayout> </LinearLayout> </LinearLayout>

4. Secondary list group-level layout ex_group_item

 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="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. Secondary list sub-layout ex_child_item

 <?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="delete" /> </RelativeLayout> </LinearLayout>

3. Entity Class

1. MessageBean

 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 : I am a merchant 19 * icon : http://120.27.23.105/images/icon.png * name : Merchant 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 salesenum; 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 salesenum; } public void setSalenum(int salesenum) { this.salenum = salesenum; } 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 "GoodsShowBean{" + "bargainPrice=" + bargainPrice + ", createtime='" + createtime + '/'' + ", detailUrl='" + detailUrl + '/'' + ", images='" + images + '/'' + ", itemtype=" + itemtype + ", pid=" + pid + ", price=" + price + ", pscid=" + pscid + ", salesenum=" + salesenum + ", sellerid=" + sellerid + ", subhead='" + subhead + '/'' + ", title='" + title + '/'' + '}'; } }

3. CartBean

 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 getSelerid() { 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

 package com.bwei.gepeng.entity; public class GroupBean { private String sellerName; private boolean groupuCb; public GroupBean(String sellerName, boolean groupuCb) { this.sellerName = sellerName; this.gropuCb = groupuCb; } public String getSellerName() { return sellerName; } public void setSellerName(String sellerName) { this.sellerName = sellerName; } public boolean isGropuCb() { return groupuCb; } public void setGropuCb(boolean groupuCb) { this.gropuCb = groupuCb; } @Override public String toString() { return "GroupBean{" + "sellerName='" + sellerName + '/'' + ", groupuCb=" + groupuCb + '}'; } }

5.ChildBean

 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. Interface

1.ApiService

 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 retrieve2.http.GET; import retrieve2.http.QueryMap; public interface ApiService { //Query product details 75 //http://120.27.23.105/product/getProductDetail?pid=75&source=android @GET("product/getProductDetail") Flowable<MessageBean<GoodsShowBean>> getNews(@QueryMap Map<String,String> map); //Query shopping cart//http://120.27.23.105/product/getCarts?uid=3802&source=android @GET("product/getCarts") Flowable<MessageBean<List<CartBean>>> getCart(@QueryMap Map<String,String> map); //Delete Shopping Cart//http://120.27.23.105/product/getCarts?uid=3802&source=android @GET("product/deleteCart") Flowable<MessageBean<List<CartBean>>> getDel(@QueryMap Map<String,String> map); //Add shopping cart//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 copypublic interface IView { void OnSuccess(Object o,String tag); void OnFailed(Exception e,String tag); } 3.IPresenter[java] view plain copyimport java.util.Map; public interface IPresenter { void getData(Map<String,String> map, String tag); } 4.IModel[java] view plain copyimport java.util.Map; public interface IModel { void getData(Map<String,String> map,String tag); }

5. Code

1. Custom View AddDeleteView

 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; // Provide a click callback interface for external use 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); //Get the control 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); //Recycle 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); } }); } // Provide an external method to modify numbers public void setNumber(int number){ if(number>0){ etNumber.setText(number+""); } } // Provide an external method to obtain the current number public int getNumber(){ String string = etNumber.getText().toString(); int i = Integer.parseInt(string); return i; } }

2. Retrofit tool class RetrofitUtils

 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 retrieve2.Retrofit; import retrieve2.adapter.rxjava2.RxJava2CallAdapterFactory; import retrieve2.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(); //Add request header Request request = original.newBuilder() .url(url) .build(); return chain.proceed(request); } } }

3.M layer

 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 layer

 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(); } } } //Query shopping cart 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() { } }); } //Query product details75 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() { } }); } //Delete shopping cart 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() { } }); } //Add shopping cart 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 Product Details Page

 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

 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

 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

 <?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

 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); } }

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