Android实现简单购物车功能

2023-09-22 14:45:05 73

本文实例为大家分享了Android实现购物车功能的具体代码，供大家参考，具体内容如下

MainActivity布局：

importandroid.os.Bundle;
importandroid.support.v7.app.AppCompatActivity;
importandroid.view.View;
importandroid.widget.CheckBox;
importandroid.widget.ListView;
importandroid.widget.TextView;
importandroid.widget.Toast;

importjava.util.ArrayList;
importjava.util.HashMap;
importjava.util.Iterator;
importjava.util.List;
importjava.util.Map;
importjava.util.Random;

publicclassMainActivityextendsAppCompatActivityimplementsCartAdapter.RefreshPriceInterface,View.OnClickListener{

privateListViewlistView;
privateCheckBoxcb_check_all;
privateTextViewtv_total_price;
privateTextViewtv_delete;
privateTextViewtv_go_to_pay;

privateCartAdapteradapter;

privatedoubletotalPrice=0.00;
privateinttotalCount=0;
privateList>goodsList;

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

initDate();
}

//控制价格展示
privatevoidpriceControl(MappitchOnMap){
totalCount=0;
totalPrice=0.00;
for(inti=0;ipitchOnMap){
priceControl(pitchOnMap);
}

@Override
publicvoidonClick(Viewview){
switch(view.getId()){
caseR.id.all_chekbox:
AllTheSelected();
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();
return;
}
Toast.makeText(this,"钱就是另一回事了~",Toast.LENGTH_SHORT).show();
break;
caseR.id.tv_delete:
if(totalCount<=0){
Toast.makeText(this,"请选择要删除的商品~",Toast.LENGTH_SHORT).show();
return;
}
checkDelete(adapter.getPitchOnMap());
break;
}
}

//删除操作
privatevoidcheckDelete(Mapmap){
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;
elseisUnCheck=true;
}
if(isCheck==true&&isUnCheck==false){//已经全选,做反选
for(inti=0;i();
for(inti=0;i<10;i++){
HashMapmap=newHashMap<>();
map.put("id",(newRandom().nextInt(10000)%(10000-2900+2900)+2900)+"");
map.put("name","购物车里的第"+(i+1)+"件商品");
map.put("type",(i+20)+"码");
map.put("price",(newRandom().nextInt(100)%(100-29+29)+29)+"");
map.put("count",(newRandom().nextInt(10)%(10-1+1)+1)+"");
goodsList.add(map);
}

initView();
}
}

CartAdapter布局：

importandroid.content.Context;
importandroid.view.LayoutInflater;
importandroid.view.View;
importandroid.view.ViewGroup;
importandroid.widget.BaseAdapter;
importandroid.widget.CheckBox;
importandroid.widget.ImageView;
importandroid.widget.TextView;
importandroid.widget.Toast;

importjava.util.HashMap;
importjava.util.List;
importjava.util.Map;

/**
*Createdbylipeng
*2017/6/5.
*/

publicclassCartAdapterextendsBaseAdapter{

privateContextcontext;
privateList>dataList;
privateViewHoldervh;
privateMappitchOnMap;
privateRefreshPriceInterfacerefreshPriceInterface;

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

pitchOnMap=newHashMap<>();
for(inti=0;i0){

if(pitchOnMap.get(dataList.get(position).get("id"))==0)vh.checkBox.setChecked(false);
elsevh.checkBox.setChecked(true);
HashMapmap=dataList.get(position);
vh.name.setText(map.get("name"));
vh.num.setText(map.get("count"));
vh.type.setText(map.get("type"));
vh.price.setText("￥"+(Double.valueOf(map.get("price"))*Integer.valueOf(map.get("count"))));

vh.checkBox.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewview){
finalintindex=position;
if(((CheckBox)view).isChecked())pitchOnMap.put(dataList.get(index).get("id"),1);elsepitchOnMap.put(dataList.get(index).get("id"),0);
refreshPriceInterface.refreshPrice(pitchOnMap);
}
});
vh.reduce.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewview){
finalintindex=position;
dataList.get(index).put("count",(Integer.valueOf(dataList.get(index).get("count"))-1)+"");
if(Integer.valueOf(dataList.get(index).get("count"))<=0){
//可提示是否删除该商品,确定就remove,否则就保留1
StringdeID=dataList.get(index).get("id");
dataList.remove(index);
pitchOnMap.remove(deID);
}
notifyDataSetChanged();
refreshPriceInterface.refreshPrice(pitchOnMap);
}
});
vh.add.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewview){
finalintindex=position;
dataList.get(index).put("count",(Integer.valueOf(dataList.get(index).get("count"))+1)+"");
if(Integer.valueOf(dataList.get(index).get("count"))>15){
//15为库存可选择上限
Toast.makeText(context,"已达库存上限~",Toast.LENGTH_SHORT).show();
return;
}
notifyDataSetChanged();
refreshPriceInterface.refreshPrice(pitchOnMap);
}
});
}

returnview;
}

publicMapgetPitchOnMap(){
returnpitchOnMap;
}
publicvoidsetPitchOnMap(MappitchOnMap){
this.pitchOnMap=newHashMap<>();
this.pitchOnMap.putAll(pitchOnMap);
}

publicinterfaceRefreshPriceInterface{
voidrefreshPrice(MappitchOnMap);
}
publicvoidsetRefreshPriceInterface(RefreshPriceInterfacerefreshPriceInterface){
this.refreshPriceInterface=refreshPriceInterface;
}

@Override
publicObjectgetItem(inti){
returnnull;
}

@Override
publiclonggetItemId(inti){
return0;
}

@Override
publicintgetCount(){
if(dataList!=null){
returndataList.size();
}else{
return0;
}
}

classViewHolder{
CheckBoxcheckBox;
ImageViewicon;
TextViewname,price,num,type,reduce,add;
}
}

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实现简单购物车功能

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