2018-07-12 14:15:09 1773瀏覽
今天扣丁學(xué)堂Android培訓(xùn)給大家分享了Android Studio實現(xiàn)簡單購物車功能及源碼，下面我們一起來看一下吧。
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".MainActivity"> <LinearLayout android:id="@+id/top_bar" android:layout_width="match_parent" android:layout_height="48dp" android:background="#E24146" android:orientation="vertical"> <TextView android:id="@+id/title" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:minHeight="48dp" android:text="購物車" android:textColor="#ffffff" android:textSize="17sp"/> </LinearLayout> <ListView android:id="@+id/listview" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:childIndicator="@null" android:groupIndicator="@null"> </ListView> <LinearLayout android:layout_width="match_parent" android:layout_height="50dp" android:orientation="horizontal"> <LinearLayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="2.5" android:gravity="center_vertical" android:orientation="horizontal"> <CheckBox android:id="@+id/all_chekbox" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_marginLeft="10dp" android:layout_marginRight="4dp" android:checkMark="?android:attr/listChoiceIndicatorMultiple" android:gravity="center" android:minHeight="64dp" android:paddingLeft="10dp" android:textAppearance="?android:attr/textAppearanceLarge" android:visibility="visible"/> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="5dp" android:text="合計:" android:textSize="16sp" android:textStyle="bold"/> <TextView android:id="@+id/tv_total_price" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="￥0.00" android:textSize="16sp" android:textStyle="bold"/> </LinearLayout> <TextView android:id="@+id/tv_delete" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:clickable="true" android:background="#a29e9e" android:gravity="center" android:text="刪除" android:textColor="#FAFAFA"/> <TextView android:id="@+id/tv_go_to_pay" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:background="#E24146" android:clickable="true" android:gravity="center" android:text="付款(0)" android:textColor="#FAFAFA"/> </LinearLayout> </LinearLayout>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#CCCCCC"/> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <CheckBox android:id="@+id/check_box" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_marginLeft="10dp" android:layout_marginRight="4dp" android:checkMark="?android:attr/listChoiceIndicatorMultiple" android:gravity="center" android:minHeight="64dp" android:minWidth="32dp" android:textAppearance="?android:attr/textAppearanceLarge" android:visibility="visible"/> <ImageView android:id="@+id/iv_adapter_list_pic" android:layout_width="85dp" android:layout_height="85dp" android:layout_marginBottom="15dp" android:layout_marginTop="13dp" android:scaleType="centerCrop" android:src="@mipmap/ic_launcher" /> <RelativeLayout android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_gravity="center_vertical" android:layout_marginTop="10dp" android:layout_marginLeft="13dp"> <TextView android:id="@+id/tv_goods_name" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginRight="10dp" android:layout_marginTop="20dp" android:ellipsize="end" android:maxLines="2" android:text="商品" android:textSize="14sp"/> <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_marginBottom="30dp" android:orientation="horizontal"> <TextView android:id="@+id/tv_goods_price" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:singleLine="true" android:textSize="14sp" android:textStyle="bold" android:text="價格"/> <TextView android:id="@+id/tv_type_size" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:layout_marginLeft="10dp" android:layout_toRightOf="@+id/tv_goods_price" android:singleLine="true" android:textSize="10sp"/> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:layout_marginRight="15dp" android:orientation="horizontal"> <TextView android:id="@+id/tv_reduce" android:layout_width="25dp" android:layout_height="25dp" android:gravity="center" android:background="#ccc" android:text="一" android:textSize="12sp"/> <TextView android:id="@+id/tv_num" android:layout_width="25dp" android:layout_height="25dp" android:gravity="center" android:singleLine="true" android:text="1" android:textSize="12sp"/> <TextView android:id="@+id/tv_add" android:layout_width="25dp" android:layout_height="25dp" android:gravity="center" android:text="十" android:background="#ccc" android:textSize="12sp"/> </LinearLayout> </RelativeLayout> </RelativeLayout> </LinearLayout> </LinearLayout>
publicclassCaetAdapterextendsBaseAdapter{
privateContextcontext;
privateList<HashMap<String,String>>list;
privateHashMap<String,Integer>pitchOnMap;
publicHashMap<String,Integer>getPitchOnMap(){
returnpitchOnMap;
}
publicvoidsetPitchOnMap(HashMap<String,Integer>pitchOnMap){
this.pitchOnMap=pitchOnMap;
}
publicCaetAdapter(Contextcontext,List<HashMap<String,String>>list){
this.context=context;
this.list=list;
pitchOnMap=newHashMap<>();
for(inti=0;i<list.size();i++){
pitchOnMap.put(list.get(i).get("id"),0);
}
}
@Override
publicintgetCount(){
returnlist.size();
}
@Override
publicObjectgetItem(intposition){
returnlist.get(position);
}
@Override
publiclonggetItemId(intposition){
returnposition;
}
@Override
publicViewgetView(finalintposition,ViewconvertView,ViewGroupparent){
convertView=View.inflate(context,R.layout.item_layout,null);
finalCheckBoxcheckBox;
ImageViewicon;
finalTextViewname,price,num,type,reduce,add;
checkBox=convertView.findViewById(R.id.check_box);
icon=convertView.findViewById(R.id.iv_adapter_list_pic);
name=convertView.findViewById(R.id.tv_goods_name);
price=convertView.findViewById(R.id.tv_goods_price);
type=convertView.findViewById(R.id.tv_type_size);
num=convertView.findViewById(R.id.tv_num);
reduce=convertView.findViewById(R.id.tv_reduce);
add=convertView.findViewById(R.id.tv_add);
name.setText(list.get(position).get("name"));
price.setText("￥"+(Integer.valueOf(list.get(position).get("price")))*(Integer.valueOf(list.get(position).get("count"))));
type.setText(list.get(position).get("type"));
num.setText(list.get(position).get("count"));
if(pitchOnMap.get(list.get(position).get("id"))==0){
checkBox.setChecked(false);
}else{
checkBox.setChecked(true);
}
checkBox.setOnCheckedChangeListener(newCompoundButton.OnCheckedChangeListener(){
@Override
publicvoidonCheckedChanged(CompoundButtonbuttonView,booleanisChecked){
if(checkBox.isChecked()){
pitchOnMap.put(list.get(position).get("id"),1);
}else{
pitchOnMap.put(list.get(position).get("id"),0);
}
mrefreshPriceInterface.refreshPrice(pitchOnMap);
}
});
//商品數(shù)量減
reduce.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
if(Integer.valueOf(list.get(position).get("count"))<=1){
Toast.makeText(context,"數(shù)量不能再減啦,只能刪除!",Toast.LENGTH_SHORT).show();
}else{
list.get(position).put("count",(Integer.valueOf(list.get(position).get("count"))-1)+"");
notifyDataSetChanged();
}
mrefreshPriceInterface.refreshPrice(pitchOnMap);
}
});
//商品數(shù)量加
add.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
list.get(position).put("count",(Integer.valueOf(list.get(position).get("count"))+1)+"");
notifyDataSetChanged();
mrefreshPriceInterface.refreshPrice(pitchOnMap);
}
});
returnconvertView;
}
/**
*創(chuàng)建接口
*/
publicinterfaceRefreshPriceInterface{
/**
*把價格展示到總價上
*@parampitchOnMap
*/
voidrefreshPrice(HashMap<String,Integer>pitchOnMap);
}
/**
*定義一個接口對象
*/
privateRefreshPriceInterfacemrefreshPriceInterface;
/**
*向外部暴露一個方法
*把價格展示到總價上
*@paramrefreshPriceInterface
*/
publicvoidsetRefreshPriceInterface(RefreshPriceInterfacerefreshPriceInterface){
mrefreshPriceInterface=refreshPriceInterface;
}
}
MainActivity
publicclassMainActivityextendsAppCompatActivityimplementsView.OnClickListener,CaetAdapter.RefreshPriceInterface{
privateLinearLayouttop_bar;
privateListViewlistview;
privateCheckBoxall_chekbox;
privateTextViewprice;
privateTextViewdelete;
privateTextViewtv_go_to_pay;
privateList<User>goodsList;
privateUserDaouserDao;
privateList<HashMap<String,String>>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,"請選擇要付款的商品~",Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(this,"付款成功",Toast.LENGTH_SHORT).show();
}
break;
}
}
/**
*數(shù)據(jù)
*/
privatevoidinitDate(){
//創(chuàng)建集合
goodsList=newArrayList<>();
//數(shù)據(jù)庫
userDao=Myapplication.getInstances().getDaoSession().getUserDao();
userDao.deleteAll();
//數(shù)據(jù)源
for(inti=0;i<10;i++){
//向數(shù)據(jù)庫存放數(shù)據(jù)
Useruser=newUser((long)i,
"購物車里的第"+(i+1)+"件商品",
(i+20)+"碼",
"10",
"10");
userDao.insert(user);
}
//從數(shù)據(jù)庫中把數(shù)據(jù)放到集合中
goodsList=userDao.loadAll();
//把結(jié)合中的數(shù)據(jù)放到HashMap集合中
for(inti=0;i<goodsList.size();i++){
HashMap<String,String>map=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(HashMap<String,Integer>pitchOnMap){
priceControl(pitchOnMap);
}
/**
*控制價格展示總價
*/
privatevoidpriceControl(Map<String,Integer>pitchOnMap){
totalCount=0;
totalPrice=0.00;
for(inti=0;i<listmap.size();i++){
if(pitchOnMap.get(listmap.get(i).get("id"))==1){
totalCount=totalCount+Integer.valueOf(listmap.get(i).get("count"));
doublegoodsPrice=Integer.valueOf(listmap.get(i).get("count"))*Double.valueOf(listmap.get(i).get("price"));
totalPrice=totalPrice+goodsPrice;
}
}
price.setText("￥"+totalPrice);
tv_go_to_pay.setText("付款("+totalCount+")");
}
/**
*刪除控制價格展示總價
*@parammap
*/
privatevoidcheckDelete(Map<String,Integer>map){
List<HashMap<String,String>>waitDeleteList=newArrayList<>();
Map<String,Integer>waitDeleteMap=newHashMap<>();
for(inti=0;i<listmap.size();i++){
if(map.get(listmap.get(i).get("id"))==1){
waitDeleteList.add(listmap.get(i));
waitDeleteMap.put(listmap.get(i).get("id"),map.get(listmap.get(i).get("id")));
}
}
listmap.removeAll(waitDeleteList);
map.remove(waitDeleteMap);
priceControl(map);
adapter.notifyDataSetChanged();
}
/**
*全選或反選
*/
privatevoidAllTheSelected(){
HashMap<String,Integer>map=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){//已經(jīng)全選,做反選
for(inti=0;i<listmap.size();i++){
map.put(listmap.get(i).get("id"),0);
}
all_chekbox.setChecked(false);
}elseif(isCheck==true&&isUnCheck==true){//部分選擇,做全選
for(inti=0;i<listmap.size();i++){
map.put(listmap.get(i).get("id"),1);
}
all_chekbox.setChecked(true);
}elseif(isCheck==false&&isUnCheck==true){//一個沒選,做全選
for(inti=0;i<listmap.size();i++){
map.put(listmap.get(i).get("id"),1);
}
all_chekbox.setChecked(true);
}
priceControl(map);
adapter.setPitchOnMap(map);
adapter.notifyDataSetChanged();
}
}
以上就是扣丁學(xué)堂Android培訓(xùn)之Android Studio實現(xiàn)簡單購物車功能及源碼的詳細介紹，希望本文的內(nèi)容對學(xué)習(xí)Android開發(fā)費有深入的了解，如果你想學(xué)習(xí)更多的Android知識，對Android有全面的了解，請關(guān)注扣丁學(xué)堂微信公眾號，或登錄扣丁學(xué)堂官網(wǎng)了解更多，還有大量Android視頻教程等著你來觀看。
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