首先是效果图
Android - 购物车页面【仿】淘宝App_第1张图片

xml布局文件

activity_shopping.xml

"http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent">    id="@+id/re"        android:layout_width="match_parent"        android:layout_height="50dp"        android:layout_alignParentLeft="true"        android:layout_alignParentStart="true"        android:layout_alignParentTop="true">        id="@+id/back"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_centerVertical="true"            android:text="〈"            android:textSize="20dp" />        id="@+id/shop"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_centerHorizontal="true"            android:layout_centerVertical="true"            android:text="购物车(0)"            android:textSize="20dp" />        id="@+id/bj"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentEnd="true"        android:layout_alignParentRight="true"        android:layout_alignParentTop="true"        android:layout_marginTop="14dp"        android:text="编辑"        android:textSize="20dp" />    id="@+id/re2"        android:layout_width="match_parent"        android:layout_height="50dp"        android:layout_alignParentBottom="true">        id="@+id/all"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="全选" />        id="@+id/price"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignBottom="@+id/all"            android:layout_centerHorizontal="true"            android:text="总价:0.00" />

add_delete.xml

"http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="horizontal">    id="@+id/delete"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="-"        android:textSize="20dp" />    id="@+id/count"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginLeft="10dp"        android:text="0"        android:textSize="20dp" />    id="@+id/add"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginLeft="10dp"        android:text="+"        android:textSize="20dp" />

child_item.xml

"http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent">    "@+id/main_check_all"        android:layout_width="30dp"        android:layout_height="30dp"        android:layout_alignParentLeft="true"        android:layout_alignParentStart="true"        android:layout_below="@+id/textView4" />    <com.facebook.drawee.view.SimpleDraweeView        android:id="@+id/imageView3"        android:layout_width="90dp"        android:layout_height="90dp"        android:layout_alignParentTop="true"        android:layout_toEndOf="@+id/main_check_all"        android:layout_toRightOf="@+id/main_check_all" />    "@+id/textView4"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_toEndOf="@+id/imageView3"        android:layout_toRightOf="@+id/imageView3"        android:text="TextView"        android:textSize="15dp" />    "@+id/textView5"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@+id/main_check_all"        android:layout_toEndOf="@+id/imageView3"        android:layout_toRightOf="@+id/imageView3"        android:text="TextView"        android:textColor="#c91622"        android:textSize="10dp" />    <com.bwei.view.ShopAddDelete        android:id="@+id/ad"        android:layout_width="80dp"        android:layout_height="30dp"        android:layout_alignBottom="@+id/imageView3"        android:layout_alignParentEnd="true"        android:layout_alignParentRight="true" />

group_item.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:paddingLeft="20sp"    android:layout_height="match_parent">    <CheckBox        android:id="@+id/main_check_all"        android:layout_width="35dp"        android:layout_height="35dp"        android:layout_alignParentLeft="true"        android:layout_alignParentStart="true"        android:layout_alignParentTop="true" />    <TextView        android:id="@+id/textView3"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignBaseline="@+id/main_check_all"        android:layout_alignBottom="@+id/main_check_all"        android:layout_toEndOf="@+id/main_check_all"        android:layout_toRightOf="@+id/main_check_all"        android:text="TextView" />RelativeLayout>

java文件

adapter文件夹：适配器

ExpandAdapter.java

public class ExpandAdapter extends BaseExpandableListAdapter implements IView {    private Context context;    private List data1;    private List> data2;    public static int q = 0;    public ExpandAdapter(Context context, List data1, List> data2) {        this.context = context;        this.data1 = data1;        this.data2 = data2;    }    @Override    public int getGroupCount() {        return data1.size();    }    @Override    public int getChildrenCount(int i) {        return data2.get(i).size();    }    @Override    public Object getGroup(int i) {        return data1.get(i);    }    @Override    public Object getChild(int i, int i1) {        return data2.get(i).get(i1);    }    @Override    public long getGroupId(int i) {        return i;    }    @Override    public long getChildId(int i, int i1) {        return i1;    }    @Override    public boolean hasStableIds() {        return false;    }    @Override    public void onSuccess(Object o) {        DeBean d = (DeBean) o;        Toast.makeText(context, d.getMsg(), Toast.LENGTH_SHORT).show();        data1.clear();        data2.clear();        ShoppingActivity s = (ShoppingActivity) context;        s.se();    }    @Override    public void onFailed(Exception e) {    }    class ViewHolder {        CheckBox check;        TextView tv;    }    class ViewHolder2 {        CheckBox check;        ImageView image;        TextView tv1, tv2;        ShopAddDelete ad;        Button b;    }    @Override    public View getGroupView(final int i, final boolean b, View view, ViewGroup viewGroup) {        final ViewHolder holder;        if (view == null) {            holder = new ViewHolder();            view = View.inflate(context, R.layout.group_item, null);            holder.check = view.findViewById(R.id.main_check_all);            holder.tv = view.findViewById(R.id.textView3);            view.setTag(holder);        } else {            holder = (ViewHolder) view.getTag();        }        holder.tv.setText(data1.get(i).getName());        holder.check.setChecked(data1.get(i).isFlag());        holder.check.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                ShoppingActivity s = (ShoppingActivity) context;                //Group布尔值变成选中状态                data1.get(i).setFlag(holder.check.isChecked());                //遍历Group集合                for (int i = 0; i < data1.size(); i++) {                    //如果有一个未选中   全选变成false并跳出                    if (!data1.get(i).isFlag()) {                        s.all.setChecked(false);                        break;                    } else {//全部选中 全选变成true                        s.all.setChecked(true);                    }                }                //Child集合布尔值为选中的状态                for (int j = 0; j < data2.get(i).size(); j++) {                    data2.get(i).get(j).setFlag(holder.check.isChecked());                }                //刷新适配器                notifyDataSetChanged();                //调用计算的方法                s.js();            }        });        return view;    }    @Override    public View getChildView(final int i, final int i1, final boolean b, View view, ViewGroup viewGroup) {        final ViewHolder2 holder2;        if (view == null) {            holder2 = new ViewHolder2();            view = View.inflate(context, R.layout.child_item, null);            holder2.check = view.findViewById(R.id.main_check_all);            holder2.image = view.findViewById(R.id.imageView3);            holder2.tv1 = view.findViewById(R.id.textView4);            holder2.tv2 = view.findViewById(R.id.textView5);            holder2.ad = view.findViewById(R.id.ad);            holder2.b = view.findViewById(R.id.button2);            view.setTag(holder2);        } else {            holder2 = (ViewHolder2) view.getTag();        }        String images = data2.get(i).get(i1).getImage();        String[] split = images.split("!");        holder2.image.setImageURI(Uri.parse(split[0]));        holder2.tv1.setText(data2.get(i).get(i1).getTitle());        holder2.tv2.setText(data2.get(i).get(i1).getPrice() + "");        holder2.ad.count.setText(data2.get(i).get(i1).getNum() + "");        holder2.check.setChecked(data2.get(i).get(i1).isFlag());        if (q == 0) {            holder2.b.setVisibility(View.GONE);        } else {            holder2.b.setVisibility(View.VISIBLE);        }        holder2.b.setOnClickListener(new View.OnClickListener() {            private DePresenter dePresenter;            @Override            public void onClick(View view) {                //http://120.27.23.105/product/deleteCart?source=android&uid=1653&pid=2                dePresenter = new DePresenter(ExpandAdapter.this);                Map map = new HashMap<>();                map.put("source", "android");                map.put("uid", "1653");                map.put("pid", data2.get(i).get(i1).getPid() + "");                dePresenter.get("http://120.27.23.105/", map);            }        });        holder2.check.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                ShoppingActivity s = (ShoppingActivity) context;                //Child布尔值变成选中状态                data2.get(i).get(i1).setFlag(holder2.check.isChecked());                //遍历Ghild集合                for (int i = 0; i < data2.size(); i++) {                    for (int j = 0; j < data2.get(i).size(); j++) {                        //如果有一个未选中     全选与商家按钮变成false并跳出                        if (!data2.get(i).get(j).isFlag()) {                            data1.get(i).setFlag(false);                            s.all.setChecked(false);                            break;                        } else {//全部选中  全选与商家按钮变成true                            data1.get(i).setFlag(true);                            s.all.setChecked(true);                        }                    }                }                //二次遍历                for (int i = 0; i < data1.size(); i++) {                    boolean flag = data1.get(i).isFlag();                    if (flag) {                        s.all.setChecked(true);                    } else {                        s.all.setChecked(false);                        break;                    }                }                notifyDataSetChanged();                //调用计算的方法                s.js();            }        });        holder2.ad.setOnAddDeleteClick(new ShopAddDelete.OnAddDeleteClickListener() {            @Override            public void onAddClick(View v) {                ShoppingActivity s = (ShoppingActivity) context;                int number = holder2.ad.getNumber();                number++;                holder2.ad.setNumber(number);                Log.i("TAG", number + "");                data2.get(i).get(i1).setNum(number);                notifyDataSetChanged();                //调用计算的方法                s.js();            }            @Override            public void onDelClick(View v) {                ShoppingActivity s = (ShoppingActivity) context;                int number = holder2.ad.getNumber();                number--;                if (number > 0) {                    holder2.ad.setNumber(number);                    data2.get(i).get(i1).setNum(number);                } else {                    Toast.makeText(context, "最小数量为1", Toast.LENGTH_SHORT).show();                }                notifyDataSetChanged();                //调用计算的方法                s.js();            }        });        return view;    }    @Override    public boolean isChildSelectable(int i, int i1) {        return false;    }

app文件夹：图片加载

App.java

public class App extends Application {    @Override    public void onCreate() {        super.onCreate();        Fresco.initialize(this);    }}

bean文件夹：数据解析

Child.java

private boolean flag;    private String image;    private String title;    private double price;    private int num;    private int pid;    public Child(boolean flag, String image, String title, double price, int num, int pid) {        this.flag = flag;        this.image = image;        this.title = title;        this.price = price;        this.num = num;        this.pid = pid;    }    public int getPid() {        return pid;    }    public void setPid(int pid) {        this.pid = pid;    }    public boolean isFlag() {        return flag;    }    public void setFlag(boolean flag) {        this.flag = flag;    }    public String getImage() {        return image;    }    public void setImage(String image) {        this.image = image;    }    public String getTitle() {        return title;    }    public void setTitle(String title) {        this.title = title;    }    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;    }}

DeBean.java

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;    }}

Group.java

private boolean flag;    private String name;    public Group(boolean flag, String name) {        this.flag = flag;        this.name = name;    }    public boolean isFlag() {        return flag;    }    public void setFlag(boolean flag) {        this.flag = flag;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }}

SeBean.java

private String msg;    private String code;    private List 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 getData() {        return data;    }    public void setData(List data) {        this.data = data;    }    public static class DataBean {    private String sellerName;        private String sellerid;        private List 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 getList() {            return list;        }        public void setList(List 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;            }        }    }}

model文件夹：数据层

DeModel.java

public class DeModel implements IModel {    private DePresenter presenter;    public DeModel(DePresenter presenter) {        this.presenter = presenter;    }    @Override    public void get(String baseurl, Map map) {        Flowable flowable = RetrofitUtils.getInstance(baseurl).getretrofit().create(ApiService.class).deget(map);        presenter.getData(flowable);    }}

IModel.java

public interface IModel {    void get(String baseurl, Map map);}

SeModel。java

public class SeModel implements IModel {    private SePresenter presenter;    public SeModel(SePresenter presenter) {        this.presenter = presenter;    }    @Override    public void get(String baseurl, Map map) {        Flowable flowable = RetrofitUtils.getInstance(baseurl).getretrofit().create(ApiService.class).seget(map);        presenter.getData(flowable);    }}

net文件夹：网络请求

ApiService.java

//http://120.27.23.105/product/getCarts?source=android&uid=1653    @GET("product/getCarts")    Flowable<SeBean> seget(@QueryMap Map<String, String> map);    //http://120.27.23.105/product/deleteCart?source=android&uid=1653&pid=2    @GET("product/deleteCart")    Flowable<DeBean> deget(@QueryMap Map<String, String> map);

RetrofitUtils.java

public class RetrofitUtils {    private static volatile RetrofitUtils instance;    private final Retrofit retrofit;    private RetrofitUtils(String baseurl) {        retrofit = new Retrofit.Builder()                .baseUrl(baseurl)                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())                .addConverterFactory(GsonConverterFactory.create())                .build();    }    public static RetrofitUtils getInstance(String baseurl) {        if (instance == null) {            synchronized (RetrofitUtils.class) {                if (instance == null) {                    instance = new RetrofitUtils(baseurl);                }            }        }        return instance;    }    public Retrofit getretrofit() {        return retrofit;    }}

presenter文件夹：逻辑层
BasePresenter.java

public interface BasePresenter {    void get(String baseurl, Map<String, String> map);    void get2(String baseurl, Map<String, String> map);}

DePresenter.java

public class DePresenter implements BasePresenter {    private IView iv;    private DisposableSubscriber disposableSubscriber;    public DePresenter(IView iv) {        this.iv = iv;    }    @Override    public void get(String baseurl, Map map) {        DeModel model = new DeModel(this);        model.get(baseurl, map);    }    @Override    public void get2(String baseurl, Map map) {    }    public void getData(Flowable flowable) {        disposableSubscriber = flowable.subscribeOn(Schedulers.io())                .observeOn(AndroidSchedulers.mainThread())                .subscribeWith(new DisposableSubscriber() {                    @Override                    public void onNext(DeBean deBean) {                        iv.onSuccess(deBean);                    }                    @Override                    public void onError(Throwable t) {                        iv.onFailed((Exception) t);                    }                    @Override                    public void onComplete() {                    }                });    }    //防止内存泄漏    public void detatch() {        if (iv != null) {            iv = null;        }        if (disposableSubscriber != null) {            if (!disposableSubscriber.isDisposed()) {                disposableSubscriber.dispose();            }        }    }}

SePresenter.java

public class SePresenter implements BasePresenter {    private IView iv;    private DisposableSubscriber disposableSubscriber;    public SePresenter(IView iv) {        this.iv = iv;    }    @Override    public void get(String baseurl, Map map) {        SeModel model = new SeModel(this);        model.get(baseurl, map);    }    @Override    public void get2(String baseurl, Map map) {    }    public void getData(Flowable flowable) {        disposableSubscriber = flowable.subscribeOn(Schedulers.io())                .observeOn(AndroidSchedulers.mainThread())                .subscribeWith(new DisposableSubscriber() {                    @Override                    public void onNext(SeBean seBean) {                        iv.onSuccess(seBean);                    }                    @Override                    public void onError(Throwable t) {                        iv.onFailed((Exception) t);                    }                    @Override                    public void onComplete() {                    }                });    }    //防止内存泄漏    public void detatch() {        if (iv != null) {            iv = null;        }        if (disposableSubscriber != null) {            if (!disposableSubscriber.isDisposed()) {                disposableSubscriber.dispose();            }        }    }

view文件夹：视图层

IView.java

public interface IView {    void onSuccess(Object o);    void onFailed(Exception e);}

ShopAddDelete.java

public class ShopAddDelete extends RelativeLayout {    public TextView count;    public ShopAddDelete(Context context) {        this(context, null);    }    public ShopAddDelete(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public ShopAddDelete(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        initView(context, attrs, defStyleAttr);    }    private OnAddDeleteClickListener listener;    //对外提供一个点击的回调接口    public interface OnAddDeleteClickListener {        void onAddClick(View v);        void onDelClick(View v);    }    public void setOnAddDeleteClick(OnAddDeleteClickListener listener) {        this.listener = listener;    }    private void initView(final Context context, AttributeSet attrs, int defStyleAttr) {        View view = View.inflate(context, R.layout.add_delete, this);        TextView delete = (TextView) view.findViewById(R.id.delete);        count = (TextView) view.findViewById(R.id.count);        TextView add = (TextView) view.findViewById(R.id.add);        delete.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View view) {                listener.onDelClick(view);            }        });        add.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View view) {                listener.onAddClick(view);            }        });    }    //对外提供设置EditText值的方法    public void setNumber(int number) {        count.setText(number + "");    }    //得到控件原来的值,并转成int类型    public int getNumber() {        int number = Integer.parseInt(count.getText().toString().trim());        return number;    }

ShoppingActivity.java

public class ShoppingActivity extends AppCompatActivity implements IView {    @BindView(R.id.back)    TextView back;    @BindView(R.id.shop)    TextView shop;    @BindView(R.id.re)    RelativeLayout re;    @BindView(R.id.bj)    TextView bj;    @BindView(R.id.price)    TextView price;    @BindView(R.id.button)    Button button;    @BindView(R.id.re2)    RelativeLayout re2;    @BindView(R.id.expandablelistview)    ExpandableListView expandablelistview;    private SePresenter sePresenter;    private List grouplist = new ArrayList<>();    private List> childlist = new ArrayList<>();    public static CheckBox all;    private ExpandAdapter expandAdapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_shopping);        all = (CheckBox) findViewById(R.id.all);        ButterKnife.bind(this);        all.setChecked(true);        expandAdapter = new ExpandAdapter(this, grouplist, childlist);        expandablelistview.setAdapter(expandAdapter);        //http://120.27.23.105/product/getCarts?source=android&uid=1653        se();        bj.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                if (bj.getText().toString().trim().equals("编辑")) {                    ExpandAdapter.q = 1;                    expandAdapter.notifyDataSetChanged();                    bj.setText("完成");                } else {                    ExpandAdapter.q = 0;                    expandAdapter.notifyDataSetChanged();                    bj.setText("编辑");                }            }        });    }    public void se() {        sePresenter = new SePresenter(this);        Map map = new HashMap<>();        map.put("source", "android");        map.put("uid", "1653");        sePresenter.get("http://120.27.23.105/", map);    }    @OnClick({R.id.back, R.id.all})    public void onViewClicked(View view) {        switch (view.getId()) {            case R.id.back:                finish();                break;            case R.id.all:                for (int i = 0; i < grouplist.size(); i++) {                    grouplist.get(i).setFlag(all.isChecked());                }                for (int i = 0; i < childlist.size(); i++) {                    for (int j = 0; j < childlist.get(i).size(); j++) {                        childlist.get(i).get(j).setFlag(all.isChecked());                    }                }                js();                expandAdapter.notifyDataSetChanged();                break;        }    }    @Override    public void onSuccess(Object o) {        SeBean s = (SeBean) o;        List data2 = s.getData();        for (int i = 0; i < data2.size(); i++) {            grouplist.add(new Group(true, data2.get(i).getSellerName()));            List list = data2.get(i).getList();            List cl = new ArrayList<>();            for (int j = 0; j < list.size(); j++) {                cl.add(new Child(true, list.get(j).getImages(), list.get(j).getTitle(), list.get(j).getPrice(), list.get(j).getNum(), list.get(j).getPid()));            }            childlist.add(cl);        }        for (int q = 0; q < expandAdapter.getGroupCount(); q++) {            expandablelistview.expandGroup(q);        }        expandAdapter.notifyDataSetChanged();    }    @Override    public void onFailed(Exception e) {    }    public void js() {        double p = 0;        int s = 0;        for (int i = 0; i < childlist.size(); i++) {            for (int j = 0; j < childlist.get(i).size(); j++) {                if (childlist.get(i).get(j).isFlag()) {                    double price = childlist.get(i).get(j).getPrice();                    int num = childlist.get(i).get(j).getNum();                    p += price * num;                    s++;                }            }        }        DecimalFormat df = new DecimalFormat("######0.00");        price.setText("总价:" + df.format(p));        button.setText("去支付(" + s + ")");        shop.setText("购物车(" + s + ")");    }}

Android - 购物车页面【仿】淘宝App