MVP，购物车啊，图片加载用Fresco，OKhttp+Retrofit实现

其他 2018-06-08 05:07:37 阅读次数: 2

1.项目框架：MVP（评分重点），图片加载用Fresco，网络请求用OKhttp+Retrofit实现（自己封装，加单例模式，（评分重点）），

2.完成购物车数据添加（如果接口无数据，可用接口工具添加数据），

3.自定义view实现加减按钮，每次点击加减，item中的总数及总价要做出相应的改变。

4.当数量为1时，点击减号，数量不变，吐司提示用户最小数量为1。

5.底部总数及总价为所有item项中的总价及总数，每个item中数量价格的更改，底部总价总数要与之联动

6.实现单选反选全选功能，首次进入默认全选，item未选中时总数及总价不计入底部数据，改变选中状态时，底部总数及总价能做出正确修改

7.点击删除按钮，删除item，底部总数及总价能做出正确修改，接口数据删除。

接口：

添加购物车

接口地址： 返回格式：json

请求方式：get/post

接口备注：添加购物车（删除sellerid字段）

请求参数说明：

名称 类型 必填 说明

uid string 是 用户id

pid string 是 商品id

查询购物车

接口地址：http://120.27.23.105/product/getCarts

返回格式：json

请求方式：get/post

接口备注：查询购物车

请求参数说明：

名称 类型 必填 说明

uid string 是 用户id

更新购物车

接口地址：http://120.27.23.105/product/updateCarts?uid=71&sellerid=1&pid=1&selected=0&num=10

返回格式：json

请求方式：get/post

接口备注：更新购物车

请求参数说明：

名称 类型 必填 说明

uid string 是 用户id

sellerid string 是 商户id

pid string 是 商品id

num string 是 商品数量

selected string 是 是否选中

删除购物车

接口地址：http://120.27.23.105/product/deleteCart?uid=72&pid=1

返回格式：json

请求方式：get/post

接口备注：删除购物车

请求参数说明：

名称 类型 必填 说明

uid string 是 用户id

pid string 是 商品id

四．思路分解

   通过文字或流程图等分析需求，形成完整解决问题思路；

提供文档或流程图，一起拷贝到u盘

 五．其他要求：

项目名称命名规范，姓名+时间，例：张三，项目名称为-Zhangsan20171027，项目包名为com.bwie.姓名全拼，功能代码模块中加入注释。





首先导依赖

compile 'com.squareup.okhttp3:okhttp:3.4.1'
compile 'com.jakewharton:butterknife:8.8.1'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
compile 'com.facebook.fresco:fresco:0.12.0'
compile 'org.greenrobot:eventbus:3.1.1'
compile 'io.reactivex.rxjava2:rxjava:2.1.7'
compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
compile 'com.squareup.retrofit2:retrofit:2.3.0'
compile 'com.squareup.retrofit2:converter-gson:2.3.0'
compile 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'
compile 'com.github.bumptech.glide:glide:3.7.0'
compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'

配置文件

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

不要忘了初始化

android:name=".MyApplication"


ApiService

public interface ApiService {
//    http://120.27.23.105/product/deleteCart?uid=72&pid=1
    @GET("product/getCarts")
    Flowable<MessageBean<List<DatasBean>>> getDatas(@Query("uid") String uid);
    @GET("product/deleteCart")
    Flowable<MessageBean> deleteData(@Query("uid") String uid, @Query("pid") String pid);
}




BasePresenter

public interface BasePresenter {

    void getData(String uid, String pid);

}



IModel

public interface IModel {

    void getData(String uid, String pid);

}



Iview

public interface Iview {


    void onSuccess(Object o);
    void onFailed(Exception e);

    void delSuccess(MessageBean listMessageBean);

}





AddDeleteView

public class AddDeleteView extends LinearLayout {

    private OnAddDelClickListener listener;
    private TextView et_number;

    public void setOnAddDelClickListener(OnAddDelClickListener listener) {
        if (listener != null) {
            this.listener = listener;
        }
    }


    interface OnAddDelClickListener{
        void onAddClick(View v);
        void onDelClick(View v);
    }

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

    public AddDeleteView(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs,0);

    }

    public AddDeleteView(Context context, @Nullable 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);
        Button but_add = findViewById(R.id.but_add);
        Button but_delete = findViewById(R.id.but_delete);
        et_number = findViewById(R.id.et_number);

        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.AddDeleteViewStyle);
        String left_text = typedArray.getString(R.styleable.AddDeleteViewStyle_left_text);
        String middle_text = typedArray.getString(R.styleable.AddDeleteViewStyle_middle_text);
        String right_text = typedArray.getString(R.styleable.AddDeleteViewStyle_right_text);
        but_delete.setText(left_text);
        but_add.setText(right_text);
        et_number.setText(middle_text);
        //释放资源
        typedArray.recycle();

        but_add.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                listener.onAddClick(view);
            }
        });
        but_delete.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                listener.onDelClick(view);
            }
        });
    }
    /**
     * 对外提供设置EditText值的方法
     */
    public void setNumber(int number){
        if (number>0){
            et_number.setText(number+"");
        }
    }
    /**
     * 得到控件原来的值
     */
    public int getNumber(){
        int number = 0;
        try {
            String numberStr = et_number.getText().toString().trim();
            number = Integer.valueOf(numberStr);
        } catch (Exception e) {
            number = 0;
        }
        return number;
    }
}




DatasBean

/**
 * 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，让智能看起来更不一样","title":"Apple iPhone 8 Plus (A1864) 64GB 金色 移动联通电信4G手机"}]
 * sellerName : 商家2
 * sellerid : 2
 */

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

public boolean isChecked() {
    return checked;
}

public void setChecked(boolean checked) {
    this.checked = checked;
}

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 : 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，让智能看起来更不一样
     * title : Apple iPhone 8 Plus (A1864) 64GB 金色 移动联通电信4G手机
     */
    private boolean checked;
    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 boolean isChecked() {
        return checked;
    }

    public void setChecked(boolean checked) {
        this.checked = checked;
    }

    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;
    }
}




DelModel

public class DelModel implements IModel{
    private DelPresenter presenter;

    public DelModel(DelPresenter presenter){
        this.presenter =  presenter;

    }
    @Override
    public void getData(String uid,String pid) {

        Flowable<MessageBean> delFlowable = RetrofitUtils.getInstance().getApiService().deleteData(uid,pid);
        presenter.delData(delFlowable);
    }
}



DelPresenter

public class DelPresenter implements BasePresenter {
    private Iview iv;
    private DisposableSubscriber subscriber2;

    public void attachView(Iview iv) {
        this.iv = iv;
    }

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

        if (!subscriber2.isDisposed()){
            subscriber2.dispose();
        }
    }

    @Override
    public void getData(String uid,String pid) {
        DelModel model = new DelModel(this);
        model.getData(uid,pid);
    }



    public void delData(Flowable<MessageBean> delFlowable) {
        subscriber2 = delFlowable.subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribeWith(new DisposableSubscriber<MessageBean>() {
                    @Override
                    public void onNext(MessageBean listMessageBean) {
                        if (listMessageBean != null) {
                            iv.delSuccess(listMessageBean);

                        }
                    }



                    @Override
                    public void onError(Throwable t) {
                        iv.onFailed((Exception) t);
                    }

                    @Override
                    public void onComplete() {

                    }
                });
    }
}



LoggingInterceptor

public class LoggingInterceptor implements Interceptor {
    @Override
    public Response intercept(Chain chain) throws IOException {
        Request original = chain.request();
        HttpUrl url=original.url().newBuilder()
                .addQueryParameter("source","android")
                .build();
        //添加请求头
        Request request = original.newBuilder()
                .url(url)
                .build();
        return chain.proceed(request);
    }

}




MainActivity

public class MainActivity extends AppCompatActivity implements Iview {
    private String uid = "1000";
    private NewsPresenter presenter;
    private CheckBox mCheckbox2;
    private ExpandableListView mElv;

    /**
     * 0
     */
    private TextView mTvPrice;
    /**
     * 结算(0)
     */
    private TextView mTvNum;
    private MyAdapter adapter;
    private List<DatasBean> groupList = new ArrayList<>();
    private List<List<DatasBean.ListBean>> childList = new ArrayList<>();
    private String pid;
    private DelPresenter delPresenter;

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


        presenter = new NewsPresenter();
        presenter.attachView(this);
        delPresenter = new DelPresenter();
        delPresenter.attachView(this);
        initView();
        adapter = new MyAdapter(this, groupList, childList);
        mElv.setAdapter(adapter);


        mCheckbox2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                adapter.changeAllListCbState(mCheckbox2.isChecked());
            }
        });

    }
    private void initView() {
        mElv = (ExpandableListView) findViewById(R.id.elv);
        mCheckbox2 = (CheckBox) findViewById(R.id.checkbox2);
        mTvPrice = (TextView) findViewById(R.id.tv_price);
        mTvNum = (TextView) findViewById(R.id.tv_num);
    }

    @Override
    public void onSuccess(Object o) {
        if(o!=null){
            List<DatasBean> list = (List<DatasBean> )o;
            if(list!=null){
                groupList.addAll(list);
                for (int i = 0; i < list.size(); i++) {
                    List<DatasBean.ListBean> datas = list.get(i).getList();
                    childList.add(datas);
                }

                adapter.notifyDataSetChanged();
                mCheckbox2.setChecked(true);

                adapter.changeAllListCbState(true);
                mElv.setGroupIndicator(null);
                for (int i=0;i<groupList.size();i++){
                    mElv.expandGroup(i);
                }

            }
        }
    }

    @Override
    public void onFailed(Exception e) {

    }

    @Override
    public void delSuccess(MessageBean listMessageBean) {
        Toast.makeText(this,listMessageBean.getMsg(),Toast.LENGTH_SHORT).show();
    }

    @Override
    protected void onResume() {
        super.onResume();
        presenter.getData(uid,pid);

    }


    @Subscribe
    public void onMessageEvent(MessageEvent event) {
        mCheckbox2.setChecked(event.isChecked());
    }

    @Subscribe
    public void onMessageEvent(PriceAndCountEvent event) {
        mTvNum.setText("结算(" + event.getCount() + ")");
        mTvPrice.setText("￥"+event.getPrice() );
    }
    @Subscribe
    public void onMessageEvent(SomeId event) {
        pid = event.getPid();
        Log.e("zxz","我得到了pid:"+pid);
        delPresenter.getData(uid,pid);


    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        EventBus.getDefault().unregister(this);
        if (presenter != null) {
            presenter.detachView();
        }
    }

}





MessageBean

public class MessageBean<T> {

    /**
     * msg : 请求成功
     * code : 0
     * data : []
     */

    private String msg;
    private String code;
    private T data;

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public String getCode() {
        return code;
    }

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

    public T getData() {
        return data;
    }

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




MessageEvent

public class MessageEvent {
    private boolean checked;

    public boolean isChecked() {
        return checked;
    }

    public void setChecked(boolean checked) {
        this.checked = checked;
    }
}




MyAdapter

public class MyAdapter extends BaseExpandableListAdapter {
    private Context context;
    private List<DatasBean> groupList;
    private List<List<DatasBean.ListBean>> childList;
    public MyAdapter(Context context, List<DatasBean> groupList, List<List<DatasBean.ListBean>> childList) {
        this.context =context;
        this.groupList = groupList;
        this.childList = childList;
    }

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

    @Override
    public int getChildrenCount(int i) {
        return childList.get(i).size();
    }

    @Override
    public Object getGroup(int i) {
        return groupList.get(i);
    }

    @Override
    public Object getChild(int i, int i1) {
        return childList.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 View getGroupView(final int i, boolean b, View view, ViewGroup viewGroup) {
        final GroupViewHolder holder;
        if (view == null) {
            holder = new GroupViewHolder();
            view = view.inflate(context,R.layout.group_layout, null);
            holder.cbGroup = view.findViewById(R.id.cb_parent);
            holder.tv_number = view.findViewById(R.id.tv_number);
            view.setTag(holder);
        } else {
            holder = (GroupViewHolder) view.getTag();
        }
        final DatasBean dataBean = groupList.get(i);
        holder.cbGroup.setChecked(dataBean.isChecked());
//        holder.tv_number.setText(dataBean.getTitle());
        holder.tv_number.setText(dataBean.getSellerName());
        //一级checkbox
        holder.cbGroup.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dataBean.setChecked(holder.cbGroup.isChecked());
                changeChildCbState(i, holder.cbGroup.isChecked());
                EventBus.getDefault().post(compute());
                changeAllCbState(isAllGroupCbSelected());
                notifyDataSetChanged();
            }
        });

        return view;
    }

    @Override
    public View getChildView(final int i, final int i1, boolean b, View view, ViewGroup viewGroup) {
        final ChildViewHolder holder;
        if (view == null) {
            holder = new ChildViewHolder();
            view = view.inflate(context,R.layout.child_layout, null);
            holder.cbChild = view.findViewById(R.id.cb_child);
            holder.tv_tel = view.findViewById(R.id.tv_tel);
             holder.draweeView = (SimpleDraweeView) view.findViewById(R.id.my_image_view);

            holder.tv_price = view.findViewById(R.id.tv_pri);
            holder.tv_del = view.findViewById(R.id.tv_del);
            holder.adv = view.findViewById(R.id.adv_main);
            view.setTag(holder);
        } else {
            holder = (ChildViewHolder) view.getTag();
        }
        final DatasBean.ListBean datasBean = childList.get(i).get(i1);

        holder.cbChild.setChecked(datasBean.isChecked());
        holder.tv_tel.setText(datasBean.getTitle());
        holder.tv_price.setText("￥"+datasBean.getPrice() );
        holder.adv.setNumber(datasBean.getNum());
        String images = datasBean.getImages().trim();
        String[] split = images.split("[|]");
        holder.draweeView.setImageURI(split[0]);


        //二级checkbox
        holder.cbChild.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //设置该条目对象里的checked属性值
                datasBean.setChecked(holder.cbChild.isChecked());
                PriceAndCountEvent priceAndCountEvent = compute();
                EventBus.getDefault().post(priceAndCountEvent);

                if (holder.cbChild.isChecked()) {
                    //当前checkbox是选中状态
                    if (isAllChildCbSelected(i)) {
                        changGroupCbState(i, true);
                        changeAllCbState(isAllGroupCbSelected());
                    }
                } else {
                    changGroupCbState(i, false);
                    changeAllCbState(isAllGroupCbSelected());
                }
                notifyDataSetChanged();
            }


        });
        holder.adv.setOnAddDelClickListener(new AddDeleteView.OnAddDelClickListener() {
            @Override
            public void onAddClick(View v) {
                Log.i(TAG, "onAddClick: 执行");
                int origin = holder.adv.getNumber();
                origin++;
//                holder.adv.setNumber(origin);
                int num = datasBean.getNum();
                num++;
                holder.adv.setNumber(num);
                datasBean.setNum(num);
                if (holder.cbChild.isChecked()) {
                    EventBus.getDefault().post(compute());
                }
            }

            @Override
            public void onDelClick(View v) {
                int origin = holder.adv.getNumber();
//                int num = datasBean.getNum();

                origin--;
                if (origin == 0) {
                    Toast.makeText(context,"最小数量为1",Toast.LENGTH_SHORT).show();
                    return ;
                }
                holder.adv.setNumber(origin);
                datasBean.setNum(origin);
                if (holder.cbChild.isChecked()) {

                    EventBus.getDefault().post(compute());
                }

            }
        });

        //删除
        holder.tv_del.setOnClickListener(new View.OnClickListener() {

            private AlertDialog dialog;

            @Override
            public void onClick(View v) {
                final List<DatasBean.ListBean> datasBeen = childList.get(i);


                AlertDialog.Builder builder = new AlertDialog.Builder(context);
                builder.setTitle("提示");
                builder.setMessage("确认是否删除？");
                builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int ii) {
                        DatasBean.ListBean remove = datasBeen.remove(i1);
                        if (datasBeen.size() == 0) {
                            childList.remove(i);
                            groupList.remove(i);
                            int pid = datasBean.getPid();
                            SomeId someId = new SomeId();
                            someId.setPid(pid+"");
                            EventBus.getDefault().post(someId);
                        }
                        EventBus.getDefault().post(compute());
                        notifyDataSetChanged();
                    }
                });
                builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        dialog.dismiss();
                    }
                });
                dialog = builder.create();
                dialog.show();

            }
        });
        return view;
    }

    @Override
    public boolean isChildSelectable(int i, int i1) {
        return false;
    }
    class GroupViewHolder {
        CheckBox cbGroup;
        TextView tv_number;
    }

    class ChildViewHolder {
        CheckBox cbChild;
        TextView tv_tel;
        TextView tv_content;
        TextView tv_time;
//        ImageView imgIcon;
        SimpleDraweeView draweeView;
        TextView tv_price;
        TextView tv_del;
        ImageView iv_del;
        ImageView iv_add;
        TextView tv_num;
        AddDeleteView adv;
    }
    /**
     * 改变全选的状态
     *
     * @param flag
     */
    private void changeAllCbState(boolean flag) {
        MessageEvent messageEvent = new MessageEvent();
        messageEvent.setChecked(flag);
        EventBus.getDefault().post(messageEvent);
    }
    /**
     * 改变一级列表checkbox状态
     *
     * @param groupPosition
     */
    private void changGroupCbState(int groupPosition, boolean flag) {
//        GoosBean.DataBean dataBean = groupList.get(groupPosition);
        DatasBean dataBean = groupList.get(groupPosition);

        dataBean.setChecked(flag);
    }

    /**
     * 改变二级列表checkbox状态
     *
     * @param groupPosition
     * @param flag
     */
    private void changeChildCbState(int groupPosition, boolean flag) {
        List<DatasBean.ListBean> datasBeen = childList.get(groupPosition);

        for (int i = 0; i < datasBeen.size(); i++) {
            DatasBean.ListBean datasBean = datasBeen.get(i);
            datasBean.setChecked(flag);
        }
    }
    /**
     * 判断一级列表是否全部选中
     *
     * @return
     */
    private boolean isAllGroupCbSelected() {
        for (int i = 0; i < groupList.size(); i++) {
            DatasBean dataBean = groupList.get(i);

            if (!dataBean.isChecked()) {
                return false;
            }
        }
        return true;
    }

    /**
     * 判断二级列表是否全部选中
     *
     * @param groupPosition
     * @return
     */
    private boolean isAllChildCbSelected(int groupPosition) {
        List<DatasBean.ListBean> datasBeen = childList.get(groupPosition);

        for (int i = 0; i < datasBeen.size(); i++) {
           DatasBean.ListBean datasBean = datasBeen.get(i);

            if (!datasBean.isChecked()) {
                return false;
            }
        }
        return true;
    }
    /**
     * 计算列表中，选中的钱和数量
     */
    private PriceAndCountEvent compute() {
        int count = 0;
        int price = 0;
        for (int i = 0; i < childList.size(); i++) {
            List<DatasBean.ListBean> datasBeen = childList.get(i);

            for (int j = 0; j < datasBeen.size(); j++) {
                DatasBean.ListBean datasBean = datasBeen.get(j);

                if (datasBean.isChecked()) {
                    price += datasBean.getNum() * datasBean.getPrice();
                    count += datasBean.getNum();
                }
            }
        }
        PriceAndCountEvent priceAndCountEvent = new PriceAndCountEvent();
        priceAndCountEvent.setCount(count);
        priceAndCountEvent.setPrice(price);
        return priceAndCountEvent;
    }
    /**
     * 设置全选、反选
     *
     * @param flag
     */
    public void changeAllListCbState(boolean flag) {
        for (int i = 0; i < groupList.size(); i++) {
            changGroupCbState(i, flag);
            changeChildCbState(i, flag);
        }
        EventBus.getDefault().post(compute());
        notifyDataSetChanged();
    }
}



MyApplication

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



NewsModel

public class NewsModel implements IModel{
    private NewsPresenter presenter;

    public NewsModel(NewsPresenter presenter){
        this.presenter = (NewsPresenter) presenter;

    }
    @Override
    public void getData(String uid,String pid) {
        Flowable<MessageBean<List<DatasBean>>> flowable = RetrofitUtils.getInstance().getApiService().getDatas(uid);
        presenter.getNews(flowable);

    }
}




NewsPresenter

public class NewsPresenter implements BasePresenter {
    private Iview iv;
    private DisposableSubscriber subscriber1;

    public void attachView(Iview iv) {
        this.iv = iv;
    }

    public void detachView() {
        if (iv != null) {
            iv = null;
        }
        if (!subscriber1.isDisposed()){
            subscriber1.dispose();
        }

    }

    @Override
    public void getData(String uid,String pid) {
        NewsModel model = new NewsModel(this);
        model.getData(uid,pid);
    }

    public void getNews(Flowable<MessageBean<List<DatasBean>>> flowable) {
        subscriber1 = flowable.subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribeWith(new DisposableSubscriber<MessageBean<List<DatasBean>>>() {
                    @Override
                    public void onNext(MessageBean<List<DatasBean>> listMessageBean) {
                        if (listMessageBean != null) {
                            List<DatasBean> list = listMessageBean.getData();
                            if (list != null) {
                                iv.onSuccess(list);
                            }
                        }
                    }

                    @Override
                    public void onError(Throwable t) {
                        iv.onFailed((Exception) t);
                    }

                    @Override
                    public void onComplete() {

                    }
                });
    }

}




PriceAndCountEvent

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

    public int getPrice() {
        return price;
    }

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

    public int getCount() {
        return count;
    }

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




RetrofitUtils

public class RetrofitUtils {
    private static volatile RetrofitUtils instance;
    private ApiService apiService;
    private OkHttpClient client = new OkHttpClient
            .Builder()
            .addInterceptor(new LoggingInterceptor())
            .build();
    private RetrofitUtils(){
        Retrofit retrofit = new Retrofit.Builder()
                .client(client)
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .baseUrl("http://120.27.23.105/")
                .build();
        apiService = retrofit.create(ApiService.class);
    }
    public static RetrofitUtils getInstance(){
        if (null==instance){
            synchronized (RetrofitUtils.class){
                if (instance==null){
                    instance = new RetrofitUtils();
                }
            }
        }
        return instance;
    }
    public ApiService getApiService(){
        return apiService;
    }
}




SomeId

public class SomeId {
    private String pid;

    public String getPid() {
        return pid;
    }

    public void setPid(String pid) {
        this.pid = pid;
    }
}




activity_main

<?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"
    tools:context="com.example.weekmoni2.MainActivity">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:gravity="center"
        android:text="购物车"
        android:textColor="#ff3660"
        android:textSize="25sp" />

    <ExpandableListView
        android:id="@+id/elv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1" />

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_alignParentBottom="true"
        android:background="@android:color/white"
        android:gravity="center_vertical">

        <CheckBox
            android:id="@+id/checkbox2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_marginLeft="10dp"
            android:focusable="false" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="50dp"
            android:layout_centerVertical="true"
            android:layout_marginLeft="10dp"
            android:layout_toRightOf="@+id/checkbox2"
            android:gravity="center_vertical"
            android:text="全选"
            android:textSize="20sp" />

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:orientation="horizontal">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="10dp"
                android:text="合计 ：" />


            <TextView
                android:id="@+id/tv_price"
                android:layout_width="wrap_content"
                android:layout_height="50dp"
                android:layout_marginLeft="10dp"
                android:paddingRight="10dp"
                android:text="0"
                android:textColor="@android:color/holo_red_light" />


            <TextView
                android:id="@+id/tv_num"
                android:layout_width="wrap_content"
                android:layout_height="50dp"
                android:background="@android:color/holo_red_dark"
                android:gravity="center"
                android:padding="10dp"
                android:text="结算(0)"
                android:textColor="@android:color/white" />
        </LinearLayout>
    </RelativeLayout>


</LinearLayout>




child_layout.xml

<?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/tools"
    android:orientation="vertical"
    android:gravity="center"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="horizontal">

        <CheckBox
            android:layout_marginLeft="20dp"

            android:id="@+id/cb_child"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:focusable="false" />

        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/my_image_view"
            android:layout_width="80dp"

            android:layout_height="80dp"
            fresco:placeholderImage="@mipmap/ic_launcher"
            />

        <RelativeLayout
            android:layout_marginLeft="10dp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">
            <LinearLayout
                android:layout_width="wrap_content"
                android:orientation="vertical"
                android:layout_height="wrap_content">

                <TextView
                    android:id="@+id/tv_tel"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:singleLine="true"
                    android:text="iphone6"

                    />

                <TextView
                    android:id="@+id/tv_pri"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="10dp"
                    android:text="¥3000.00"

                    />

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="10dp"
                    android:gravity="center_vertical">

                    <com.example.weekmoni2.AddDeleteView
                        android:id="@+id/adv_main"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        app:left_text="-"
                        app:middle_text="3"
                        app:right_text="+"/>
                </LinearLayout>

            </LinearLayout>
            <TextView
                android:id="@+id/tv_del"
                android:layout_width="40dp"
                android:layout_height="40dp"
                android:text="删除"
                android:layout_alignParentRight="true"
                android:layout_marginRight="10dp"
                android:layout_marginTop="25dp"
                android:layout_centerVertical="true"
                android:gravity="center" />
        </RelativeLayout>
    </LinearLayout>



</LinearLayout>



group_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:gravity="center"
    android:layout_height="match_parent">
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@android:color/white" >

        <CheckBox
            android:id="@+id/cb_parent"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="4dp"
            android:checkMark="?android:attr/listChoiceIndicatorMultiple"
            android:gravity="center"
            android:minHeight="38dp"
            android:minWidth="32dp"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:visibility="visible" />

        <TextView
            android:id="@+id/tv_number"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_marginBottom="10dp"
            android:layout_marginTop="10dp"
            android:layout_toRightOf="@id/cb_parent"
            android:background="@android:color/white"
            android:drawablePadding="10dp"
            android:text="第八号当铺"
            android:textColor="#666666"
            android:textSize="18sp" />
    </RelativeLayout>
</LinearLayout>


layout_add_delete.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal"
        >
        <Button
            android:id="@+id/but_delete"
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:text="-"
            />
        <TextView
            android:id="@+id/et_number"
            android:layout_width="40dp"
            android:inputType="number"
            android:layout_height="wrap_content"
            android:gravity="center"

            />
        <Button
            android:id="@+id/but_add"
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:text="+"
            />
    </LinearLayout>
</LinearLayout>


values下的

attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="AddDeleteViewStyle">
        <attr name="left_text" format="string"/>
        <attr name="right_text" format="string"/>
        <attr name="middle_text" format="string"/>
    </declare-styleable>
</resources>

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