Android Studio实现简单购物车功能

2023-09-10 11:58:05 81

本文实例为大家分享了Android九宫格图片展示的具体代码，供大家参考，具体内容如下

MainActivity的布局文件

条目的布局文件

CartAdapter适配器

publicclassCaetAdapterextendsBaseAdapter{

privateContextcontext;
privateList>list;
privateHashMappitchOnMap;

publicHashMapgetPitchOnMap(){
returnpitchOnMap;
}

publicvoidsetPitchOnMap(HashMappitchOnMap){
this.pitchOnMap=pitchOnMap;
}

publicCaetAdapter(Contextcontext,List>list){
this.context=context;
this.list=list;

pitchOnMap=newHashMap<>();
for(inti=0;ipitchOnMap);
}

/**
*定义一个接口对象
*/
privateRefreshPriceInterfacemrefreshPriceInterface;

/**
*向外部暴露一个方法
*把价格展示到总价上
*@paramrefreshPriceInterface
*/
publicvoidsetRefreshPriceInterface(RefreshPriceInterfacerefreshPriceInterface){
mrefreshPriceInterface=refreshPriceInterface;
}


}

MainActivity

publicclassMainActivityextendsAppCompatActivityimplementsView.OnClickListener,CaetAdapter.RefreshPriceInterface{

privateLinearLayouttop_bar;
privateListViewlistview;
privateCheckBoxall_chekbox;
privateTextViewprice;
privateTextViewdelete;
privateTextViewtv_go_to_pay;

privateListgoodsList;
privateUserDaouserDao;
privateList>listmap=newArrayList<>();
privateCaetAdapteradapter;

privatedoubletotalPrice=0.00;
privateinttotalCount=0;

@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}

privatevoidinitView(){
top_bar=(LinearLayout)findViewById(R.id.top_bar);
listview=(ListView)findViewById(R.id.listview);
all_chekbox=(CheckBox)findViewById(R.id.all_chekbox);
price=(TextView)findViewById(R.id.tv_total_price);
delete=(TextView)findViewById(R.id.tv_delete);
tv_go_to_pay=(TextView)findViewById(R.id.tv_go_to_pay);

all_chekbox.setOnClickListener(this);
delete.setOnClickListener(this);
tv_go_to_pay.setOnClickListener(this);

initDate();
adapter=newCaetAdapter(MainActivity.this,listmap);
listview.setAdapter(adapter);
adapter.setRefreshPriceInterface(this);
}

@Override
publicvoidonClick(Viewv){
switch(v.getId()){
caseR.id.all_chekbox:
AllTheSelected();
break;
caseR.id.tv_delete:
checkDelete(adapter.getPitchOnMap());
break;
caseR.id.tv_go_to_pay:
if(totalCount<=0){
Toast.makeText(this,"请选择要付款的商品~",Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(this,"付款成功",Toast.LENGTH_SHORT).show();
}
break;
}
}
/**
*数据
*/
privatevoidinitDate(){
//创建集合
goodsList=newArrayList<>();
//数据库
userDao=Myapplication.getInstances().getDaoSession().getUserDao();
userDao.deleteAll();
//数据源
for(inti=0;i<10;i++){
//向数据库存放数据
Useruser=newUser((long)i,
"购物车里的第"+(i+1)+"件商品",
(i+20)+"码",
"10",
"10");
userDao.insert(user);
}
//从数据库中把数据放到集合中
goodsList=userDao.loadAll();
//把结合中的数据放到HashMap集合中
for(inti=0;imap=newHashMap<>();
map.put("id",goodsList.get(i).getId()+"");
map.put("name",goodsList.get(i).getName());
map.put("type",(goodsList.get(i).getType()));
map.put("price",goodsList.get(i).getPrice()+"");
map.put("count",goodsList.get(i).getCount()+"");
listmap.add(map);
}
}

@Override
publicvoidrefreshPrice(HashMappitchOnMap){
priceControl(pitchOnMap);
}

/**
*控制价格展示总价
*/
privatevoidpriceControl(MappitchOnMap){
totalCount=0;
totalPrice=0.00;
for(inti=0;imap){
List>waitDeleteList=newArrayList<>();
MapwaitDeleteMap=newHashMap<>();
for(inti=0;imap=adapter.getPitchOnMap();
booleanisCheck=false;
booleanisUnCheck=false;
Iteratoriter=map.entrySet().iterator();
while(iter.hasNext()){
Map.Entryentry=(Map.Entry)iter.next();

if(Integer.valueOf(entry.getValue().toString())==1){
isCheck=true;
}else{
isUnCheck=true;
}
}
if(isCheck==true&&isUnCheck==false){//已经全选,做反选
for(inti=0;i
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毛票票。

Android Studio实现简单购物车功能

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