ExpandableListView实现二级列表购物车
程序员文章站
2022-05-27 10:23:21
android中常常要用到listview，有时也要用到expandablelistview，如在手机设置中，对于分类有很好的效果，会用listview的人一定会用expa...
android中常常要用到listview，有时也要用到expandablelistview，如在手机设置中，对于分类有很好的效果，会用listview的人一定会用expandablelistview，因为expandablelistview extends listview的，下面来看个简单的例子
运行效果图：
导入依赖
compile 'com.google.code.gson:gson:2.8.2' compile 'com.squareup.okhttp3:okhttp:3.9.0'
记得要把okhttp的原生文件夹复制进去，话不多说请看代码：
mainactivity布局：
<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="40dp"> <checkbox android:id="@+id/cb" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centervertical="true" android:text="全选" /> <textview android:id="@+id/tvtotal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centervertical="true" android:layout_marginleft="15dp" android:layout_torightof="@id/cb" android:text="合计:" /> <textview android:id="@+id/tvcount" android:layout_width="100dp" android:layout_height="match_parent" android:layout_alignparentright="true" android:layout_centervertical="true" android:background="#ff0000" android:gravity="center" android:text="去结算(0)" android:textcolor="#ffffff" /> </relativelayout>
适配器的group布局：
<checkbox android:id="@+id/cb_group" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <textview android:id="@+id/tv_group" android:layout_width="match_parent" android:layout_height="40dp" android:gravity="center_vertical" android:text="111"/>
适配器child布局：
<checkbox
android:id="@+id/cb_child"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<imageview
android:id="@+id/iv"
android:layout_width="100dp"
android:layout_height="100dp" />
<linearlayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<textview
android:id="@+id/tv_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<textview
android:id="@+id/tv_subhead"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<textview
android:id="@+id/tvsubhead"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<linearlayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal">
<textview
android:id="@+id/tvprice"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<imageview
android:layout_marginleft="10dp"
android:id="@+id/ivdel"
android:layout_width="25dp"
android:layout_height="25dp"
android:background="@drawable/iv_del" />
<textview
android:id="@+id/tvnum"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textsize="25sp"
android:layout_marginleft="3dp"
android:layout_marginright="3dp"
android:text="1"/>
<imageview
android:id="@+id/ivadd"
android:layout_width="25dp"
android:layout_height="25dp"
android:background="@drawable/iv_add" />
</linearlayout>
</linearlayout>
<textview
android:id="@+id/btdel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="删除" />
接下来看代码：
用mvp获取的数据首先先在项目里创建三个文件夹分别是：model、view、persenter
model页面代码传的参数：
public interface gowuchemodel {
public void get(string uid, callback callback);
}
model页面的代码：
public class mygowuchemodel implements gowuchemodel {
@override
public void get(string uid, callback callback) {
hashmap<string, string> map = new hashmap<>();
map.put("uid", uid);
okhttp3utils.dopost("http://120.27.23.105/product/getcarts?source=android", map, callback);
}
}
view页面的代码：
public interface gowucheview {
public void success(shopbean bean);
public void failuer(exception e);
}
persenter页面的代码：
public class gowuchepersenter {
gowucheview view;
private final mygowuchemodel model;
public gowuchepersenter(gowucheview view) {
this.view = view;
model = new mygowuchemodel();
}
public void getdata(string uid) {
model.get(uid, new onuicallback() {
@override
public void onfailed(call call, ioexception e) {
if (view != null) {
view.failuer(e);
}
}
@override
public void onsuccess(string result) {
gson gson = new gson();
shopbean bean = gson.fromjson(result, shopbean.class);
view.success(bean);
}
});
}
public void saaa() {
this.view = null;
}
}
mainactivity页面代码：
public class mainactivity extends appcompatactivity implements gowucheview {
private gowuchepersenter persenter;
private expandablelistview melv;
/**
* 全选
*/
private checkbox mcb;
/**
* 合计:
*/
private textview mtvtotal;
/**
* 去结算(0)
*/
private textview mtvcount;
private elvadapter elvadapter;
list<shopbean.data> group = new arraylist<>();
list<list<shopbean.data.list>> child = new arraylist<>();
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_main);
initview();
persenter = new gowuchepersenter(this);
persenter.getdata("99");
mcb.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view v) {
elvadapter.allornone(mcb.ischecked());
}
});
}
private void initview() {
melv = (expandablelistview) findviewbyid(r.id.elv);
mcb = (checkbox) findviewbyid(r.id.cb);
mtvtotal = (textview) findviewbyid(r.id.tvtotal);
mtvcount = (textview) findviewbyid(r.id.tvcount);
}
public void setpriceandcount(priceandcount priceandcount) {
mtvtotal.settext("合计：" + priceandcount.getprice());
mtvcount.settext("去结算（" + priceandcount.getcount() + ")");
}
public void setallchecked(boolean bool) {
mcb.setchecked(bool);
}
@override
public void success(shopbean bean) {
for (int i = 0; i < bean.getdata().size(); i++) {
group.add(bean.getdata().get(i));
}
for (int i = 0; i < group.size(); i++) {
child.add(bean.getdata().get(i).getlist());
}
elvadapter = new elvadapter(this, group, child);
melv.setgroupindicator(null);
melv.setadapter(elvadapter);
for (int i = 0; i < group.size(); i++) {
melv.expandgroup(i);
}
}
@override
public void failuer(exception e) {
}
@override
protected void ondestroy() {
super.ondestroy();
persenter.saaa();
}
}
adapter页面代码：
public class elvadapter extends baseexpandablelistadapter {
private final layoutinflater inflater;
private context context;
private list<shopbean.data> group;
private list<list<shopbean.data.list>> child;
public elvadapter(context context, list<shopbean.data> group, list<list<shopbean.data.list>> child) {
this.context = context;
this.group = group;
this.child = child;
inflater = layoutinflater.from(context);
}
@override
public int getgroupcount() {
return group.size();
}
@override
public int getchildrencount(int groupposition) {
return child.get(groupposition).size();
}
@override
public object getgroup(int groupposition) {
return group.get(groupposition);
}
@override
public object getchild(int groupposition, int childposition) {
return child.get(groupposition).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 false;
}
@override
public view getgroupview(final int groupposition, boolean isexpanded, view convertview, viewgroup parent) {
view view;
log.i("============", "getgroupview: ");
final groupviewholder holder;
if (convertview == null) {
view = inflater.inflate(r.layout.elv_group, null);
holder = new groupviewholder();
holder.tv = view.findviewbyid(r.id.tv_group);
holder.cbgroup = view.findviewbyid(r.id.cb_group);
view.settag(holder);
} else {
view = convertview;
holder = (groupviewholder) view.gettag();
}
final shopbean.data data = group.get(groupposition);
holder.tv.settext(data.getsellername());
holder.cbgroup.setchecked(data.ischeck());
holder.cbgroup.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view v) {
//需要改变三个checkbox的状态值
//1.一级列表的checkbox的状态值
data.setcheck(holder.cbgroup.ischecked());
//二级列表的checkbox的状态值
setchildrencb(groupposition, holder.cbgroup.ischecked());
//全选的checkbox状态值
((mainactivity) context).setallchecked(isallgroupcbchecked());
//计算钱和数量并显示
setpriceandcount();
//刷新界面
notifydatasetchanged();
}
});
return view;
}
@override
public view getchildview(final int groupposition, final int childposition, boolean islastchild, view convertview, viewgroup parent) {
view view1;
final childviewholder holder1;
if (convertview == null) {
view1 = inflater.inflate(r.layout.elv_child, null);
holder1 = new childviewholder();
holder1.iv = view1.findviewbyid(r.id.iv);
holder1.tvtitle = view1.findviewbyid(r.id.tv_title);
holder1.tvsubhead = view1.findviewbyid(r.id.tvsubhead);
holder1.tvprice = view1.findviewbyid(r.id.tvprice);
holder1.cbchild = view1.findviewbyid(r.id.cb_child);
holder1.btdel = view1.findviewbyid(r.id.btdel);
holder1.tvnum = view1.findviewbyid(r.id.tvnum);
holder1.ivdel = view1.findviewbyid(r.id.ivdel);
holder1.ivadd = view1.findviewbyid(r.id.ivadd);
view1.settag(holder1);
} else {
view1 = convertview;
holder1 = (childviewholder) view1.gettag();
}
final shopbean.data.list listbean = child.get(groupposition).get(childposition);
string images = listbean.getimages();
glide.with(context).load(images.split("\\|")[0]).into(holder1.iv);
holder1.tvtitle.settext(listbean.gettitle());
holder1.cbchild.setchecked(child.get(groupposition).get(childposition).ischecked());
holder1.tvsubhead.settext(listbean.getsubhead());
holder1.tvprice.settext(listbean.getprice() + "元");
holder1.tvnum.settext(listbean.getcount() + "");
holder1.cbchild.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view v) {
//需要改变三个checkbox的状态值
//2.二级列表的checkbox状态值
listbean.setchecked(holder1.cbchild.ischecked());
//1.一级列表的checkbox的状态值
group.get(groupposition).setcheck(isallchildcbchecked(groupposition));
//3.全选的checkbox状态值
((mainactivity) context).setallchecked(isallgroupcbchecked());
//计算钱和数量并显示
setpriceandcount();
//刷新界面
notifydatasetchanged();
}
});
//加一件商品
holder1.ivadd.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view v) {
int count = listbean.getcount();
count++;
//改变javabean里的状态值
listbean.setcount(count);
//计算钱和数量并显示
setpriceandcount();
//刷新列表
notifydatasetchanged();
}
});
//减少一件商品
holder1.ivdel.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view v) {
int count = listbean.getcount();
if (count <= 1) {
count = 1;
} else {
count--;
}
//改变javabean里的状态值
listbean.setcount(count);
//计算钱和数量并显示
setpriceandcount();
//刷新列表
notifydatasetchanged();
}
});
//删除
holder1.btdel.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view v) {
//其时就是删除集合
list<shopbean.data.list> listbeans = child.get(groupposition);
if (listbeans.size() > 0) {
listbeans.remove(childposition);
}
if (listbeans.size() == 0) {
child.remove(groupposition);
group.remove(groupposition);
}
//计算钱和数量并显示
setpriceandcount();
//改变全选状态
((mainactivity) context).setallchecked(isallgroupcbchecked());
//刷新列表
notifydatasetchanged();
}
});
return view1;
}
@override
public boolean ischildselectable(int groupposition, int childposition) {
return false;
}
/**
* 设置一级列表对应的二级列表的checkbox状态
*/
private void setchildrencb(int groupposition, boolean bool) {
list<shopbean.data.list> listbeans = child.get(groupposition);
for (int i = 0; i < listbeans.size(); i++) {
listbeans.get(i).setchecked(bool);
}
}
/**
* 判断一级列表checkbox状态
*/
private boolean isallgroupcbchecked() {
if (group.size() == 0) {
return false;
}
for (int i = 0; i < group.size(); i++) {
if (!group.get(i).ischeck()) {
return false;
}
}
return true;
}
/**
* 判断二级列表checkbox的状态
*/
private boolean isallchildcbchecked(int groupposition) {
list<shopbean.data.list> listbeans = child.get(groupposition);
for (int i = 0; i < listbeans.size(); i++) {
if (!listbeans.get(i).ischecked()) {
return false;
}
}
return true;
}
/**
* 设置钱和数量
*/
private void setpriceandcount(){
((mainactivity)context).setpriceandcount(compute());
}
/**
* 计算钱和数量
*/
private priceandcount compute(){
double price = 0;
int count = 0;
for (int i = 0; i < group.size(); i++) {
list<shopbean.data.list> listbeans = child.get(i);
for (int j = 0; j <listbeans.size() ; j++) {
if(listbeans.get(j).ischecked()){
price+=listbeans.get(j).getprice()*listbeans.get(j).getcount();
count+=listbeans.get(j).getcount();
}
}
}
return new priceandcount(price,count);
}
/**
* 全选或者全不选
*/
public void allornone(boolean bool){
for (int i = 0; i < group.size(); i++) {
group.get(i).setcheck(bool);
setchildrencb(i,bool);
}
setpriceandcount();
notifydatasetchanged();
}
class groupviewholder {
textview tv;
checkbox cbgroup;
}
class childviewholder {
imageview iv;
textview tvtitle;
textview tvsubhead;
textview tvprice;
checkbox cbchild;
textview btdel;
textview tvnum;
imageview ivdel;
imageview ivadd;
}
}
bean类代码：
创建一个priceandcount 代码
public class priceandcount {
private double price;
private int count;
public priceandcount(double price, int count) {
this.price = price;
this.count = count;
}
public double getprice() {
return price;
}
public void setprice(double price) {
this.price = price;
}
public int getcount() {
return count;
}
public void setcount(int count) {
this.count = count;
}
}
bean类：
public class shopbean {
/**
* msg : 请求成功
* code : 0
* data : [{"list":[{"bargainprice":11800,"createtime":"2017-10-10t17:33:37","detailurl":"https://item.m.jd.com/product/4338107.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=qqfriends","images":"https://m.360buyimg.com/n0/jfs/t6700/155/2098998076/156185/6cf95035/595dd5a5nc3a7dab5.jpg!q70.jpg","num":1,"pid":57,"price":5199,"pscid":40,"selected":0,"sellerid":1,"subhead":"【i5 mx150 2g显存】全高清窄边框 8g内存 256固态硬盘 支持指纹识别 预装win10系统","title":"小米(mi)air 13.3英寸全金属轻薄笔记本(i5-7200u 8g 256g pcle ssd mx150 2g独显 fhd 指纹识别 win10）银\r\n"}],"sellername":"商家1","sellerid":"1"},{"list":[{"bargainprice":399,"createtime":"2017-10-02t15:20:02","detailurl":"https://item.m.jd.com/product/1439822107.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=qqfriends","images":"https://m.360buyimg.com/n0/jfs/t5887/201/859509257/69994/6bde9bf6/59224c24ne854e14c.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5641/233/853609022/57374/5c73d281/59224c24n3324d5f4.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5641/233/853609022/57374/5c73d281/59224c24n3324d5f4.jpg!q70.jpg","num":2,"pid":81,"price":699,"pscid":85,"selected":0,"sellerid":2,"subhead":"满2件，总价打6.50折","title":"gap男装 休闲舒适简约水洗五袋直筒长裤紧身牛仔裤941825 深灰色 33/32(175/84a)"},{"bargainprice":11800,"createtime":"2017-10-14t21:38:26","detailurl":"https://item.m.jd.com/product/5025518.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=qqfriends","images":"https://m.360buyimg.com/n0/jfs/t8830/106/1760940277/195595/5cf9412f/59bf2ef5n5ab7dc16.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5428/70/1520969931/274676/b644dd0d/591128e7nd2f70da0.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5566/365/1519564203/36911/620c750c/591128ean54ac3363.jpg!q70.jpg","num":4,"pid":58,"price":6399,"pscid":40,"selected":0,"sellerid":2,"subhead":"升级4g大显存！nvme协议pcie ssd,速度快人一步】gtx1050ti就选拯救者！专业游戏键盘&新模具全新设计！","title":"联想(lenovo)拯救者r720 15.6英寸游戏笔记本电脑(i5-7300hq 8g 1t+128g ssd gtx1050ti 4g ips 黑)"}],"sellername":"商家2","sellerid":"2"},{"list":[{"bargainprice":11800,"createtime":"2017-10-14t21:48:08","detailurl":"https://mitem.jd.hk/ware/view.action?wareid=1988853309&cachekey=1acb07a701ece8d2434a6ae7fa6870a1","images":"https://m.360buyimg.com/n0/jfs/t6130/97/1370670410/180682/1109582a/593276b1nd81fe723.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5698/110/2617517836/202970/c9388feb/593276b7nbd94ef1f.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5815/178/2614671118/51656/7f52d137/593276c7n107b725a.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t5878/60/2557817477/30873/4502b606/593276can5a7d6357.jpg!q70.jpg","num":1,"pid":60,"price":13888,"pscid":40,"selected":0,"sellerid":4,"subhead":"购买电脑办公部分商品满1元返火车票5元优惠券（返完即止）","title":"全球购 新款apple macbook pro 苹果笔记本电脑 银色vp2新13英寸bar i5/8g/256g"}],"sellername":"商家4","sellerid":"4"},{"list":[{"bargainprice":111.99,"createtime":"2017-10-03t23:53:28","detailurl":"https://item.m.jd.com/product/4719303.html?utm_source=androidapp&utm_medium=appshare&utm_campaign=t_335139774&utm_term=qqfriends","images":"https://m.360buyimg.com/n0/jfs/t9004/210/1160833155/647627/ad6be059/59b4f4e1n9a2b1532.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7504/338/63721388/491286/f5957f53/598e95f1n7f2adb87.jpg!q70.jpg|https://m.360buyimg.com/n0/jfs/t7441/10/64242474/419246/adb30a7d/598e95fbnd989ba0a.jpg!q70.jpg","num":1,"pid":3,"price":198,"pscid":1,"selected":0,"sellerid":19,"subhead":"每个中秋都不能简单，无论身在何处，你总需要一块饼让生活更圆满，京东月饼让爱更圆满京东自营，闪电配送，更多惊喜，快用手指戳一下","title":"北京稻香村 稻香村中秋节月饼 老北京月饼礼盒655g"}],"sellername":"商家19","sellerid":"19"}]
*/
private string msg;
private string code;
/**
* list : [{"bargainprice":11800,"createtime":"2017-10-10t17:33:37","detailurl":"https://item.m.jd.com/product/4338107.html?utm#_source=androidapp&utm#_medium=appshare&utm#_campaign=t#_335139774&utm#_term=qqfriends","images":"https://m.360buyimg.com/n0/jfs/t6700/155/2098998076/156185/6cf95035/595dd5a5nc3a7dab5.jpg!q70.jpg","num":1,"pid":57,"price":5199,"pscid":40,"selected":0,"sellerid":1,"subhead":"【i5 mx150 2g显存】全高清窄边框 8g内存 256固态硬盘 支持指纹识别 预装win10系统","title":"小米(mi)air 13.3英寸全金属轻薄笔记本(i5-7200u 8g 256g pcle ssd mx150 2g独显 fhd 指纹识别 win10）银\r\n"}]
* sellername : 商家1
* sellerid : 1
*/
private list<data> data;
public void setmsg(string msg) {
this.msg = msg;
}
public void setcode(string code) {
this.code = code;
}
public void setdata(list<data> data) {
this.data = data;
}
public string getmsg() {
return msg;
}
public string getcode() {
return code;
}
public list<data> getdata() {
return data;
}
public static class data {
public boolean ischeck() {
return ischeck;
}
public void setcheck(boolean check) {
ischeck = check;
}
private boolean ischeck;
private string sellername;
private string sellerid;
/**
* bargainprice : 11800.0
* createtime : 2017-10-10t17:33:37
* detailurl :
* images : /595dd5a5nc3a7dab5.jpg!q70.jpg
* num : 1
* pid : 57
* price : 5199.0
* pscid : 40
* selected : 0
* sellerid : 1
* subhead : 【i5 mx150 2g显存】全高清窄边框 8g内存 256固态硬盘 支持指纹识别 预装win10系统
* title : 小米(mi)air 13.3英寸全金属轻薄笔记本(i5-7200u 8g 256g pcle ssd mx150 2g独显 fhd 指纹识别 win10）银
*/
private java.util.list<list> list;
public void setsellername(string sellername) {
this.sellername = sellername;
}
public void setsellerid(string sellerid) {
this.sellerid = sellerid;
}
public void setlist(java.util.list<list> list) {
this.list = list;
}
public string getsellername() {
return sellername;
}
public string getsellerid() {
return sellerid;
}
public java.util.list<list> getlist() {
return list;
}
public static class list {
private boolean ischecked;
public boolean ischecked() {
return ischecked;
}
public void setchecked(boolean checked) {
ischecked = checked;
}
private int count;
public int getcount() {
return count;
}
public void setcount(int count) {
this.count = count;
}
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 void setbargainprice(double bargainprice) {
this.bargainprice = bargainprice;
}
public void setcreatetime(string createtime) {
this.createtime = createtime;
}
public void setdetailurl(string detailurl) {
this.detailurl = detailurl;
}
public void setimages(string images) {
this.images = images;
}
public void setnum(int num) {
this.num = num;
}
public void setpid(int pid) {
this.pid = pid;
}
public void setprice(double price) {
this.price = price;
}
public void setpscid(int pscid) {
this.pscid = pscid;
}
public void setselected(int selected) {
this.selected = selected;
}
public void setsellerid(int sellerid) {
this.sellerid = sellerid;
}
public void setsubhead(string subhead) {
this.subhead = subhead;
}
public void settitle(string title) {
this.title = title;
}
public double getbargainprice() {
return bargainprice;
}
public string getcreatetime() {
return createtime;
}
public string getdetailurl() {
return detailurl;
}
public string getimages() {
return images;
}
public int getnum() {
return num;
}
public int getpid() {
return pid;
}
public double getprice() {
return price;
}
public int getpscid() {
return pscid;
}
public int getselected() {
return selected;
}
public int getsellerid() {
return sellerid;
}
public string getsubhead() {
return subhead;
}
public string gettitle() {
return title;
}
}
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
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