This article shares the specific code for Android to implement shopping cart function for your reference. The specific content is as follows
MainActivity Layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:andro
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:
android:layout_width="match_parent"
android:layout_height="48dp"
android:background="#E24146"
android:orientation="vertical" >
<TextView
android:
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:minHeight="48dp"
android:text="Shopping cart"
android:textColor="#ffffff"
android:textSize="17sp" />
</LinearLayout>
<ListView
android:
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:
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="10dp"
android:layout_marginRight="4dp"
android:button="@drawable/check_box_bg"
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="total:"
android:textSize="16sp"
android:textStyle="bold" />
<TextView
android:
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="￥0.00"
android:textColor="@color/purple"
android:textSize="16sp"
android:textStyle="bold" />
</LinearLayout>
<TextView
android:
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="@color/orange"
android:clickable="true"
android:gravity="center"
android:text="delete"
android:textColor="#FAFAFA" />
<TextView
android:
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#E24146"
android:clickable="true"
android:gravity="center"
android:text="Payment(0)"
android:textColor="#FAFAFA" />
</LinearLayout>
</LinearLayout>
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public class MainActivity extends AppCompatActivity implements ,{
private ListView listView;
private CheckBox cb_check_all;
private TextView tv_total_price;
private TextView tv_delete;
private TextView tv_go_to_pay;
private CartAdapter adapter;
private double totalPrice = 0.00;
private int totalCount = 0;
private List<HashMap<String,String>> goodsList;
@Override
protected void onCreate(Bundle savedInstanceState) {
(savedInstanceState);
setContentView(.activity_main);
initDate();
}
//Control price display private void priceControl(Map<String, Integer> pitchOnMap){
totalCount = 0;
totalPrice = 0.00;
for(int i=0;i<();i++){
if(((i).get("id"))==1){
totalCount=totalCount+((i).get("count"));
double goodsPrice=((i).get("count"))*((i).get("price"));
totalPrice=totalPrice+goodsPrice;
}
}
tv_total_price.setText("￥ "+totalPrice);
tv_go_to_pay.setText("Payment("+totalCount+")");
}
@Override
public void refreshPrice(Map<String, Integer> pitchOnMap) {
priceControl(pitchOnMap);
}
@Override
public void onClick(View view) {
switch (()){
case .all_chekbox:
AllTheSelected();
break;
case .tv_go_to_pay:
if(totalCount<=0){
(this,"Please select the item to be paid for~",Toast.LENGTH_SHORT).show();
return;
}
(this,"Money is another matter~",Toast.LENGTH_SHORT).show();
break;
case .tv_delete:
if(totalCount<=0){
(this,"Please select the product you want to delete~",Toast.LENGTH_SHORT).show();
return;
}
checkDelete(());
break;
}
}
//Delete operation private void checkDelete(Map<String,Integer> map){
List<HashMap<String,String>> waitDeleteList=new ArrayList<>();
Map<String,Integer> waitDeleteMap =new HashMap<>();
for(int i=0;i<();i++){
if(((i).get("id"))==1){
((i));
((i).get("id"),((i).get("id")));
}
}
(waitDeleteList);
(waitDeleteMap);
priceControl(map);
();
}
//Select all or reverse private void AllTheSelected(){
Map<String,Integer> map=();
boolean isCheck=false;
boolean isUnCheck=false;
Iterator iter = ().iterator();
while (()) {
entry = () ();
if((().toString())==1)isCheck=true;
else isUnCheck=true;
}
if(isCheck==true&&isUnCheck==false){//I have selected all, do reverse selection for(int i=0;i<();i++){
((i).get("id"),0);
}
cb_check_all.setChecked(false);
}else if(isCheck==true && isUnCheck==true){//Selection of some, make all for(int i=0;i<();i++){
((i).get("id"),1);
}
cb_check_all.setChecked(true);
}else if(isCheck==false && isUnCheck==true){//No one is selected, choose all for(int i=0;i<();i++){
((i).get("id"),1);
}
cb_check_all.setChecked(true);
}
priceControl(map);
(map);
();
}
private void initView(){
listView = (ListView) findViewById();
cb_check_all = (CheckBox) findViewById(.all_chekbox);
tv_total_price = (TextView) findViewById(.tv_total_price);
tv_delete = (TextView) findViewById(.tv_delete);
tv_go_to_pay = (TextView) findViewById(.tv_go_to_pay);
tv_go_to_pay.setOnClickListener(this);
tv_delete.setOnClickListener(this);
cb_check_all.setOnClickListener(this);
adapter=new CartAdapter(this,goodsList);
(this);
(adapter);
();
}
private void initDate(){
goodsList=new ArrayList<>();
for(int i=0;i<10;i++){
HashMap<String,String> map=new HashMap<>();
("id",(new Random().nextInt(10000)%(10000-2900+2900) + 2900)+"");
("name","The No. 1 in the Shopping Cart"+(i+1)+"Product");
("type",(i+20)+"code");
("price",(new Random().nextInt(100)%(100-29+29) + 29)+"");
("count",(new Random().nextInt(10)%(10-1+1) + 1)+"");
(map);
}
initView();
}
}
CartAdapter layout:
<LinearLayout xmlns:andro
android:layout_width="match_parent"
android:layout_height="wrap_content"
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:background="@color/page_backgroup"
android:orientation="horizontal" >
<CheckBox
android:
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="10dp"
android:layout_marginRight="4dp"
android:button="@drawable/check_box_bg"
android:checkMark="?android:attr/listChoiceIndicatorMultiple"
android:gravity="center"
android:minHeight="64dp"
android:minWidth="32dp"
android:textAppearance="?android:attr/textAppearanceLarge"
android:visibility="visible" />
<ImageView
android:
android:layout_width="85dp"
android:layout_height="85dp"
android:layout_marginBottom="15dp"
android:layout_marginTop="13dp"
android:scaleType="centerCrop"
android:src="@mipmap/good_icon" />
<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:
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:textColor="@color/grey_color1"
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:
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:singleLine="true"
android:textColor="@color/orange_color"
android:textSize="14sp"
android:textStyle="bold" />
<TextView
android:
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:textColor="@color/grey_color3"
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:
android:layout_width="25dp"
android:layout_height="25dp"
android:background="@drawable/text_angle_gray"
android:gravity="center"
android:text="one"
android:textColor="@color/grey_color1"
android:textSize="12sp" />
<TextView
android:
android:layout_width="25dp"
android:layout_height="25dp"
android:background="@drawable/text_angle"
android:gravity="center"
android:singleLine="true"
android:text="1"
android:textColor="@color/grey_color1"
android:textSize="12sp" />
<TextView
android:
android:layout_width="25dp"
android:layout_height="25dp"
android:background="@drawable/text_angle_right"
android:gravity="center"
android:text="+"
android:textColor="@color/grey_color1"
android:textSize="12sp" />
</LinearLayout>
</RelativeLayout>
</RelativeLayout>
</LinearLayout>
</LinearLayout>
import ;
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/**
* Created by lipeng
* 2017/6/5.
*/
public class CartAdapter extends BaseAdapter {
private Context context;
private List<HashMap<String,String>> dataList;
private ViewHolder vh;
private Map<String,Integer> pitchOnMap;
private RefreshPriceInterface refreshPriceInterface;
public CartAdapter(Context context, List<HashMap<String,String>> list){
=context;
=list;
pitchOnMap=new HashMap<>();
for(int i=0;i<();i++){
((i).get("id"),0);
}
}
@Override
public View getView(final int position, View view, ViewGroup viewGroup) {
vh=new ViewHolder();
if(view==null){
view= (context).inflate(.item_layout,null);
=(CheckBox)(.check_box);
=(ImageView)(.iv_adapter_list_pic);
=(TextView)(.tv_goods_name);
=(TextView)(.tv_goods_price);
=(TextView)(.tv_type_size);
=(TextView)(.tv_num);
=(TextView)(.tv_reduce);
=(TextView)(.tv_add);
(vh);
}else {
vh=(ViewHolder)();
}
if(()>0){
if(((position).get("id"))==0)(false);
else (true);
HashMap<String,String> map=(position);
(("name"));
(("count"));
(("type"));
("￥ "+((("price")) * (("count"))));
(new () {
@Override
public void onClick(View view) {
final int index=position;
if(((CheckBox)view).isChecked())((index).get("id"),1);else ((index).get("id"),0);
(pitchOnMap);
}
});
(new () {
@Override
public void onClick(View view) {
final int index=position;
(index).put("count",(((index).get("count"))-1)+"");
if(((index).get("count"))<=0){
//You can prompt whether to delete the product. If you confirm, remove it, otherwise you will keep 1 String deID=(index).get("id");
(index);
(deID);
}
notifyDataSetChanged();
(pitchOnMap);
}
});
(new () {
@Override
public void onClick(View view) {
final int index=position;
(index).put("count",(((index).get("count"))+1)+"");
if(((index).get("count"))>15){
//15 is the inventory can be selected for the upper limit (context,"The inventory limit has been reached~",Toast.LENGTH_SHORT).show();
return;
}
notifyDataSetChanged();
(pitchOnMap);
}
});
}
return view;
}
public Map<String,Integer> getPitchOnMap(){
return pitchOnMap;
}
public void setPitchOnMap(Map<String,Integer> pitchOnMap){
=new HashMap<>();
(pitchOnMap);
}
public interface RefreshPriceInterface{
void refreshPrice(Map<String, Integer> pitchOnMap);
}
public void setRefreshPriceInterface(RefreshPriceInterface refreshPriceInterface){
=refreshPriceInterface;
}
@Override
public Object getItem(int i) {
return null;
}
@Override
public long getItemId(int i) {
return 0;
}
@Override
public int getCount() {
if (dataList != null) {
return ();
} else {
return 0;
}
}
class ViewHolder{
CheckBox checkBox;
ImageView icon;
TextView name,price,num,type,reduce,add;
}
}
The above is all the content of this article. I hope it will be helpful to everyone's study and I hope everyone will support me more.