安卓購物車簡單實現

1.主佈局

<?xml version="1.0" encoding="utf-8"?>

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

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

    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/qx"
        android:text="全選"
        />

    <Space
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="合計"
        android:id="@+id/tvSum"
        android:textSize="20sp"
        android:paddingRight="50dp"
        />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="結算"
        android:id="@+id/jiesuan"
        android:textSize="20sp"
        android:background="#f21212"
        />

</LinearLayout>

2.shop1接口
public interface Shop1 {
void onSuccess(List<ShopBean.DataBean> list);
void onFailer(String error);
}

3.View層
public interface ShopView1 {
void onSuccess(List<ShopBean.DataBean> list);
void onFailer(String error);
}

4.Model層
public class ShopModel {
private String path=“http://120.27.23.105/product/getCarts?source=android&uid=99”;
Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
}
};
public void shop1(final Shop1 shop1){
OkHttp.createget(path, new Callback() {
@Override
public void onFailure(Call call, IOException e) {

        }

        @Override
        public void onResponse(Call call, Response response) throws IOException {
            final String string = response.body().string();
            handler.post(new Runnable() {
                @Override
                public void run() {
                    Gson gson = new Gson();
                    ShopBean shopBean = gson.fromJson(string, ShopBean.class);
                    List<ShopBean.DataBean> data = shopBean.getData();
                    if (data!=null){
                        shop1.onSuccess(data);
                    }else {
                        shop1.onFailer("失敗");
                    }
                }
            });
        }
    });
}

}
5.Presenter層
public class ShopPresenter {
private ShopView1 shopView1;
private ShopModel shopModel;

public ShopPresenter(ShopView1 shopView1) {
    this.shopView1 = shopView1;
    shopModel= new ShopModel();
}
public void shop1(){
    shopModel.shop1(new Shop1() {
        @Override
        public void onSuccess(List<ShopBean.DataBean> list) {
            shopView1.onSuccess(list);
        }

        @Override
        public void onFailer(String error) {
            shopView1.onFailer(error);
        }
    });
}

}

6.Bean層
public class ShopBean {
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<DataBean> getData() {
    return data;
}

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

public static class DataBean {
    private String sellerName;
    private String sellerid;
    private List<ListBean> list;
    private boolean isChecked;

    public boolean isChecked() {
        return isChecked;
    }

    public void setChecked(boolean checked) {
        isChecked = 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 {
        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 selected!=0;
        }
        public void setBargainPrice(double bargainPrice) {
            this.bargainPrice = bargainPrice;
        }

        public String getCreatetime() {
            return createtime;
        }

        public void setCreatetime(String createtime) {
            this.createtime = createtime;
        }

        public String getDetailUrl() {
            return detailUrl;
        }

        public void setDetailUrl(String detailUrl) {
            this.detailUrl = detailUrl;
        }

        public String getImages() {
            return images;
        }

        public void setImages(String images) {
            this.images = images;
        }

        public int getNum() {
            return num;
        }

        public void setNum(int num) {
            this.num = num;
        }

        public int getPid() {
            return pid;
        }

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

        public double getPrice() {
            return price;
        }

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

        public int getPscid() {
            return pscid;
        }

        public void setPscid(int pscid) {
            this.pscid = pscid;
        }

        public int getSelected() {
            return selected;
        }

        public void setSelected(int selected) {
            this.selected = selected;
        }

        public int getSellerid() {
            return sellerid;
        }

        public void setSellerid(int sellerid) {
            this.sellerid = sellerid;
        }

        public String getSubhead() {
            return subhead;
        }

        public void setSubhead(String subhead) {
            this.subhead = subhead;
        }

        public String getTitle() {
            return title;
        }

        public void setTitle(String title) {
            this.title = title;
        }

        @Override
        public String toString() {
            return "ListBean{" +
                    "bargainPrice=" + bargainPrice +
                    ", createtime='" + createtime + '\'' +
                    ", detailUrl='" + detailUrl + '\'' +
                    ", images='" + images + '\'' +
                    ", num=" + num +
                    ", pid=" + pid +
                    ", price=" + price +
                    ", pscid=" + pscid +
                    ", selected=" + selected +
                    ", sellerid=" + sellerid +
                    ", subhead='" + subhead + '\'' +
                    ", title='" + title + '\'' +
                    '}';
        }
    }

    @Override
    public String toString() {
        return "DataBean{" +
                "sellerName='" + sellerName + '\'' +
                ", sellerid='" + sellerid + '\'' +
                ", list=" + list +
                '}';
    }
}

@Override
public String toString() {
    return "ShopBean{" +
            "msg='" + msg + '\'' +
            ", code='" + code + '\'' +
            ", data=" + data +
            '}';
}

}

7.group2第二層佈局

<?xml version="1.0" encoding="utf-8"?>

<CheckBox
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/checkbox2"
    android:focusable="false"
    />
<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/name1"
    android:textSize="20sp"
    />

8.第三層佈局

<?xml version="1.0" encoding="utf-8"?>

<CheckBox
    android:id="@+id/checkboxz"
    android:focusable="false"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentStart="true"
    android:layout_alignParentTop="true"
    android:layout_marginTop="37dp" />

<ImageView
    android:id="@+id/imagez"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:layout_alignParentStart="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_marginStart="52dp"
    android:layout_marginLeft="52dp"
    android:layout_marginTop="0dp"
    android:src="@mipmap/ic_launcher" />

<TextView
    android:id="@+id/textz1"
    android:layout_width="300dp"
    android:layout_height="wrap_content"
    android:layout_toRightOf="@+id/imagez"
    android:maxLines="2"
    android:text="sdfas"
    android:textSize="16sp" />

<TextView
    android:id="@+id/textz2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBottom="@+id/imagez"
    android:layout_toRightOf="@+id/imagez"
    android:text="sdfa" />

<bw.com.yk.AddSum
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/sumz"
    android:layout_alignBottom="@+id/textz2"
    android:layout_alignParentRight="true"
    android:layout_marginRight="10dp"

    >

</bw.com.yk.AddSum>

9.加減器
public class AddSum extends LinearLayout {

private TextView add;
private TextView jian;
private TextView number;

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

public AddSum(Context context,  AttributeSet attrs) {
    this(context, attrs,-1);
}

public AddSum(Context context,  AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    initView(context);
    initListener();
}

private void initView(Context context) {
    View view = View.inflate(context,R.layout.layout_add,this);
    add = view.findViewById(R.id.tAdd);
    jian = view.findViewById(R.id.tSub);
    number = view.findViewById(R.id.tNumber);
    number.setText("1");
}
private void initListener() {
    add.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            add();
        }
    });
    jian.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            jian();
        }
    });
}

private void jian() {
    String s = number.getText().toString();
    int parseInt = Integer.parseInt(s);
    if (parseInt>1){
        parseInt--;
        setCurrent(parseInt);
    }else {
        Toast.makeText(getContext().getApplicationContext(), "不能再少了", Toast.LENGTH_SHORT).show();
    }
}

private void add() {
    String s = number.getText().toString();
    int parseInt = Integer.parseInt(s);
    parseInt++;
    setCurrent(parseInt);
}

public void setCurrent(int parseInt) {
    number.setText(parseInt+"");
    if (onNumChangeListener!=null){
        onNumChangeListener.OnClick(this,parseInt);
    }
}



public interface OnNumChangeListener{
    void OnClick(View view,int curnum);
}
OnNumChangeListener onNumChangeListener;

public void setOnNumChangeListener(OnNumChangeListener onNumChangeListener) {
    this.onNumChangeListener = onNumChangeListener;
}

}

10.shape邊框

11.Frag04
public class Frag04 extends Fragment implements ShopView1 {

private ShopPresenter shopPresenter;
private View view;
private ExpandableListView expandableListView;
private CheckBox qx;
private TextView heji;
private ExpandAdapter2 expandAdapter2;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    view = inflater.inflate(R.layout.fragment_frag04, container, false);
    initView();
    initListener();
    return view;
}

private void initListener() {
    expandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
        @Override
        public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
            ShopBean.DataBean group = (ShopBean.DataBean) expandAdapter2.getGroup(groupPosition);
            group.setChecked(!group.isChecked());
            int c=0;
            if (group.isChecked()){
                c=1;
            }
            List<ShopBean.DataBean.ListBean> list = group.getList();
            for (int i = 0; i < list.size(); i++) {
                ShopBean.DataBean.ListBean listBean = list.get(i);
                listBean.setSelected(c);
            }
            expandAdapter2.notifyDataSetChanged();
            getTotal();
            return true;
        }
    });
    expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
        @Override
        public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
            ShopBean.DataBean.ListBean child = (ShopBean.DataBean.ListBean) expandAdapter2.getChild(groupPosition, childPosition);
            boolean checked = child.isChecked();
            if (checked){
                child.setSelected(0);
            }else {
                child.setSelected(1);
            }
            expandAdapter2.notifyDataSetChanged();
            getTotal();
            return true;
        }
    });
}

private void initView() {
    qx = view.findViewById(R.id.qx);
    heji = view.findViewById(R.id.tvSum);
    shopPresenter=new ShopPresenter(this);
    shopPresenter.shop1();
    expandableListView = view.findViewById(R.id.expand);
    qx.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if (isChecked){
                setCheckAll(1);
            }else {
                setCheckAll(0);
            }
        }
    });
}

public void setCheckAll(int s) {
    int groupCount = expandAdapter2.getGroupCount();
    for (int j = 0; j <groupCount ; j++) {
        ShopBean.DataBean group = (ShopBean.DataBean) expandAdapter2.getGroup(j);
        if (group.isChecked()==false){
            group.setChecked(true);
        }else {
            group.setChecked(false);
        }

        List<ShopBean.DataBean.ListBean> list = group.getList();
        for (int k = 0; k <list.size() ; k++) {
            ShopBean.DataBean.ListBean listBean = list.get(k);
            listBean.setSelected(s);
        }
    }
    expandAdapter2.notifyDataSetChanged();
    getTotal();
}

private void getTotal() {
    double totla=0;
    int groupCount = expandAdapter2.getGroupCount();
    for (int i = 0; i <groupCount ; i++) {
        ShopBean.DataBean group = (ShopBean.DataBean) expandAdapter2.getGroup(i);
        List<ShopBean.DataBean.ListBean> list = group.getList();
        for (int j = 0; j <list.size() ; j++) {
            ShopBean.DataBean.ListBean listBean = list.get(j);
            boolean checked = listBean.isChecked();
            if (checked){
                double price = list.get(j).getPrice();
                totla+=price*listBean.getNum();
            }

        }
    }
    heji.setText("合計："+totla);
}

@Override
public void onSuccess(List<ShopBean.DataBean> list) {
    expandAdapter2 = new ExpandAdapter2(getActivity(),list);
    expandableListView.setAdapter(expandAdapter2);
    for (int i = 0; i < expandAdapter2.getGroupCount() ; i++) {
        expandableListView.expandGroup(i);
    }
    expandAdapter2.setOnNumChangeListener(new AddSum.OnNumChangeListener() {
        @Override
        public void OnClick(View view, int curnum) {
            getTotal();
        }
    });
}

@Override
public void onFailer(String error) {

}

}

12.ExpandAdapter2
public class ExpandAdapter2 extends BaseExpandableListAdapter {
private Context context;
private List<ShopBean.DataBean> list;
private AddSum.OnNumChangeListener onNumChangeListener;
public ExpandAdapter2(Context context, List<ShopBean.DataBean> list) {
this.context = context;
this.list = list;
}

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

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

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

@Override
public Object getChild(int groupPosition, int childPosition) {
    return list.get(groupPosition).getList().get(childPosition);
}

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

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

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

@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
    MyHolder myHolder=null;
    if (convertView==null){
        convertView=View.inflate(context, R.layout.group2,null);
        myHolder = new MyHolder();
        myHolder.checkBox=convertView.findViewById(R.id.checkbox2);
        myHolder.textView=convertView.findViewById(R.id.name1);
        convertView.setTag(myHolder);
    }else {
        myHolder= (MyHolder) convertView.getTag();
    }
    myHolder.textView.setText(list.get(groupPosition).getSellerName());
    myHolder.checkBox.setChecked(list.get(groupPosition).isChecked());
    return convertView;
}

@Override
public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
    ChildViewHolder childViewHolder = null;
    if (convertView==null){
        convertView=View.inflate(context,R.layout.zi,null);
        childViewHolder = new ChildViewHolder();
        childViewHolder.cbChecked=convertView.findViewById(R.id.checkboxz);
        childViewHolder.addSum=convertView.findViewById(R.id.sumz);
        childViewHolder.ivGoodsIcon=convertView.findViewById(R.id.imagez);
        childViewHolder.tvGoodsName=convertView.findViewById(R.id.textz1);
        childViewHolder.tvGoodsPrice=convertView.findViewById(R.id.textz2);
        convertView.setTag(childViewHolder);
    }else {
        childViewHolder= (ChildViewHolder) convertView.getTag();
    }
    String images = list.get(groupPosition).getList().get(childPosition).getImages();
    String[] split = images.split("\\|");
    if (split.length>0){
        Glide.with(context).load(split[childPosition]).into(childViewHolder.ivGoodsIcon);
    }
    childViewHolder.tvGoodsName.setText(list.get(groupPosition).getList().get(childPosition).getTitle());
    childViewHolder.tvGoodsPrice.setText(list.get(groupPosition).getList().get(childPosition).getPrice()+"");
    childViewHolder.cbChecked.setChecked(list.get(groupPosition).getList().get(childPosition).isChecked());
    childViewHolder.addSum.setCurrent(list.get(groupPosition).getList().get(childPosition).getNum());
    childViewHolder.addSum.setOnNumChangeListener(new AddSum.OnNumChangeListener() {
        @Override
        public void OnClick(View view, int curnum) {
            list.get(groupPosition).getList().get(childPosition).setNum(curnum);
            if (onNumChangeListener!=null){
                onNumChangeListener.OnClick(view,curnum);
            }
        }
    });
    return convertView;
}

public void setOnNumChangeListener(AddSum.OnNumChangeListener onNumChangeListener){
        this.onNumChangeListener=onNumChangeListener;
}

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    return true;
}
class MyHolder{
    CheckBox checkBox;
    TextView textView;
}
class ChildViewHolder {
    CheckBox cbChecked;

    ImageView ivGoodsIcon;

    TextView tvGoodsName;
    TextView tvGoodsPrice;

   AddSum addSum;

}

}