我正在开发一个Android电子商务应用程序，其中有两个不同的按钮。第一个是添加到购物车按钮，另一个是立即购买按钮。
当我点击添加到购物车按钮时，它会成功将项目放入购物车中，点击购物车按钮后，应用程序将进入购物车活动。我做了同样的现在购买，但问题是如何更新我的购物车并单击一下转到购物车活动？
ProductDescription.java：
package com.www.prashant;
import android.app.ProgressDialog;
import android.graphics.Paint;
import android.os.AsyncTask;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.daimajia.slider.library.SliderLayout;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.PropertyInfo;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import org.xmlpull.v1.XmlPullParserException;
import java.io.IOException;
public class ProductDescription extends Fragment {
View V;
int position;
ImageView product_image;
TextView product_desc;
public TextView price;
public TextView specialPrice;
TextView product_name;
ImageLoader image;
SliderLayout product_images;
Button sharbtn;
public TextView txt_qty;
public Button btn_plus;
public Button btn_buy;
ProgressDialog pdialog;
public int sum=0;
public int remove=0;
String cartMessage;
String cartMessage1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
((MainActivity)getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(true);
((MainActivity)getActivity()).actionBarDrawerToggle.setDrawerIndicatorEnabled(false);
Constants.lastDetails = true;
setHasOptionsMenu(true);
}
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.product_details, container, false);
//Set Navigation mode as Statndard
((MainActivity)getActivity()).getSupportActionBar().setNavigationMode(((MainActivity) getActivity()).getSupportActionBar().NAVIGATION_MODE_STANDARD);
V=v;
//get Product Position
position = Constants.product_position;
//Initialize ids
product_image=(ImageView) V.findViewById(R.id.product_image);
product_desc=(TextView) V.findViewById(R.id.textProductDescription);
price=(TextView) V.findViewById(R.id.text1);
specialPrice = (TextView) V.findViewById(R.id.textSpecialPrice);
product_name=(TextView) V.findViewById(R.id.textProductName);
//sharbtn=(Button)V.findViewById(R.id.sharbtn);
image=new ImageLoader(getActivity());
image.DisplayImage(Constants.Product_image.get(position), product_image);
product_name.setText(Constants.Product_name.get(position));
product_desc.setText(Constants.Product_desc.get(position));
// product_adesc.setText(Constants.Product_adesc.get(position));
if(Constants.Product_specialPrice.get(position) < Constants.Product_price.get(position)
&& Constants.Product_specialPrice.get(position)!=0){
price.setText(String.format("%.2f",Constants.Product_price.get(position)));
price.setPaintFlags(price.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
specialPrice.setText(String.format("%.2f",Constants.Product_specialPrice.get(position)));
}
else {
price.setText(String.format("%.2f",Constants.Product_price.get(position)));
specialPrice.setText(null);
}
btn_plus = (Button) V.findViewById(R.id.btn_plus);
btn_buy = (Button) V.findViewById(R.id.btn_buy);
// btn_minus = (ImageButton) V.findViewById(R.id.btn_minus);
txt_qty = (TextView) V.findViewById(R.id.txt_qty);
txt_qty.setText(String.valueOf(Constants.Product_qty.get(position)));
**/* Button Click Listener for Add Qty*/**
btn_plus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Constants.Product_pos=position;
remove=0;
sum = Integer.parseInt(txt_qty.getText().toString())+1;
Constants.Product_qty.set(position, sum);
cartMessage1="Adding product to cart...";
cartMessage="Product was added successfully";
new updateCart().execute();
}
});
**/* Button Click Listener for Buy Qty*/**
btn_buy.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Constants.Product_pos=position;
remove=0;
sum = Integer.parseInt(txt_qty.getText().toString())+1;
Constants.Product_qty.set(position, sum);
cartMessage1="Adding product to cart...";
cartMessage="Product was added successfully";
new updateCart().execute();
}
});
product_image.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ImageFragment imageFrag=new ImageFragment();
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.main_content,imageFrag,null).addToBackStack(null).commit();
getActivity().setTitle("Images");
}
});
return v;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
//((MainActivity)getActivity()).resetActionBar(true, DrawerLayout.LOCK_MODE_LOCKED_OPEN);
super.onActivityCreated(savedInstanceState);
}
@Override
public void onDestroy() {
super.onDestroy();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == android.R.id.home) {
((MainActivity)getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(true);
((MainActivity)getActivity()).actionBarDrawerToggle.setDrawerIndicatorEnabled(true);
MainActivity.getInstance().CallFragment(Constants.position);
}
return true;
}
//Add product to cart task
public class updateCart extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
if (pdialog==null){
pdialog=new ProgressDialog(getActivity());
pdialog.setMessage(cartMessage1);
pdialog.setCanceledOnTouchOutside(false);
pdialog.setCancelable(false);
pdialog.show();
}
}
@Override
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
// parse json data from server in background
parseJSONDataAddProductToCart();
return null;
}
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
if (pdialog.isShowing()){
pdialog.dismiss();
pdialog=null;
}
Toast.makeText(getActivity(), cartMessage, Toast.LENGTH_LONG).show();
//Update Notification Count in action bar icon
//Constants.cart_count += 1;
//txt_qty.setText(String.valueOf(sum));
MainActivity.getInstance().updateHotCount(Constants.ProductCart_Id.size());
txt_qty.setText(String.valueOf(Constants.Product_qty.get(position)));
// if internet connection and data available show data on list
// otherwise, show alert text
}
}
//Remove product from cart
public class removeCartProduct extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
if (pdialog==null){
pdialog=new ProgressDialog(getActivity());
pdialog.setMessage(cartMessage1);
pdialog.setCanceledOnTouchOutside(false);
pdialog.setCancelable(false);
pdialog.show();
}
}
@Override
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
// parse json data from server in background
parseJSONDataAddProductToCart();
return null;
}
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
if (pdialog.isShowing()){
pdialog.dismiss();
pdialog=null;
}
Toast.makeText(getActivity(), cartMessage,Toast.LENGTH_LONG).show();
//Update Notification Count in action bar icon
//Constants.cart_count -= 1;
//txt_qty.setText(String.valueOf(sum));
MainActivity.getInstance().updateHotCount(Constants.ProductCart_Id.size());
txt_qty.setText(String.valueOf(Constants.Product_qty.get(position)));
// if internet connection and data available show data on list
// otherwise, show alert text
}
}
public void parseJSONDataAddProductToCart(){
try {
SoapObject item = new SoapObject(Constants.NAMESPACE, "shoppingCartProductEntity");
SoapObject request;
int qty;
if(remove==0){
request = new SoapObject(Constants.NAMESPACE, "shoppingCartProductAdd");
qty=1;
}else{
qty= Constants.Product_qty.get(Constants.Product_pos);
if(qty==0){
request = new SoapObject(Constants.NAMESPACE, "shoppingCartProductRemove");
}else{
request = new SoapObject(Constants.NAMESPACE, "shoppingCartProductUpdate");
}
}
// add paramaters and values
request.addProperty("sessionId", Constants.sessionId);
PropertyInfo pinfo = new PropertyInfo();
pinfo.setName("product_id");
pinfo.setValue(Constants.Product_ID.get(Constants.Product_pos));
pinfo.setType(String.class);
item.addProperty(pinfo);
pinfo = new PropertyInfo();
pinfo.setName("qty");
pinfo.setValue(qty);
pinfo.setType(Double.class);
item.addProperty(pinfo);
SoapObject EntityArray = new SoapObject(Constants.NAMESPACE, "shoppingCartProductEntityArray");
EntityArray.addProperty("products", item);
request.addProperty("quoteId", Constants.cartId);
request.addProperty("products",EntityArray);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.dotNet = true;
envelope.setOutputSoapObject(request);
//Web method call
HttpTransportSE androidHttpTransport = new HttpTransportSE(Constants.URL);
androidHttpTransport.debug = true;
androidHttpTransport.call("", envelope);
//get the response
Object result = envelope.getResponse();
Constants.CartaddStatus=result.toString();
if(Constants.CartaddStatus == "true"){
if (Constants.ProductCart_Id.isEmpty()){
Constants.cartArrayPos=0;
}
if (!Constants.ProductCart_Id.contains(Constants.Product_ID.get(Constants.Product_pos))) {
Constants.ProductCart_Id.add(Constants.cartArrayPos,Constants.Product_ID.get(Constants.Product_pos));
Constants.ProductCart_Img.add(Constants.cartArrayPos,Constants.Product_image.get(Constants.Product_pos));
Constants.ProductCart_Price.add(Constants.cartArrayPos, Constants.Product_price.get(Constants.Product_pos));
Constants.cartArrayPos+=1;
}
if (qty==0){
Constants.ProductCart_Id.remove(Constants.Product_pos);
Constants.ProductCart_Img.remove(Constants.Product_pos);
Constants.ProductCart_Price.remove(Constants.Product_pos);
Constants.cartArrayPos-=1;
}
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (XmlPullParserException e) {
e.printStackTrace();
}
}
}
ActivityCart：
package com.www.prashant;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.GridView;
import android.widget.TextView;
import android.widget.Toast;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONObject;
import org.json.simple.parser.JSONParser;
/**
* Created by Prashant on 10/16/2016.
*/
public class ActivityCart extends Fragment {
int run;
ProgressDialog pdialog;
View v;
GridView list2;
CartImageLoadAdapter adapter;
public static ActivityCart sActivityCart;
public Double TotalPrice= 0.00;
TextView btn_place_order;
TextView btn_place;
Button btn_place_ord;
static String TotalProductCartPrice;
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.cart, container, false);
sActivityCart = this;
((MainActivity)getActivity()).getSupportActionBar().setDisplayShowTitleEnabled(true);
((MainActivity)getActivity()).getSupportActionBar().setNavigationMode(((MainActivity) getActivity()).getSupportActionBar().NAVIGATION_MODE_STANDARD);
list2=(GridView)v.findViewById(R.id.cartlist);
//list2.setBackgroundColor(Color.BLACK);
//list2.setVerticalSpacing(1);
// list2.setHorizontalSpacing(1);
clearData();
btn_place_order = (TextView) v.findViewById(R.id.btn_place_order);
// btn_place = (TextView) v.findViewById(R.id.btn_place);
btn_place_ord = (Button) v.findViewById(R.id.btn_place_ord);
btn_place_ord.setOnClickListener(listener);
return v;
}
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Constants.lastDetails = false;
((AppCompatActivity) getActivity()).getSupportActionBar().setSubtitle(null);
((MainActivity)getActivity()).actionBarDrawerToggle.setDrawerIndicatorEnabled(true);
Constants.cartEntry=1;
new getDataTask().execute();
}
void clearData(){
Constants.Product_ID.clear();
Constants.Product_name.clear();
Constants.Product_price.clear();
Constants.Product_image.clear();
Constants.Product_qty.clear();
Constants.Product_specialPrice.clear();
Constants.Product_desc.clear();
//Constants.Product_adesc.clear();
}
@Override
public void onDestroy()
{
// Remove adapter refference from list
if (run==1) {
list2.setAdapter(null);
//Refresh cache directory downloaded images
adapter.imageLoader.clearCache();
adapter.notifyDataSetChanged();
}
super.onDestroy();
}
//Click Listner for place order button
public View.OnClickListener listener=new View.OnClickListener(){
@Override
public void onClick(View arg0) {
if(run == 1) {
// Call Login Function
if(Constants.Customer_FirstName.equals(""))
{
CartLogin CartLogin=new CartLogin();
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.main_content,CartLogin,null).addToBackStack(null).commit();
getActivity().setTitle("Login");
}
else {
// Call Shipping Information Function
ActivityCustomerAddress CustomerAddress=new ActivityCustomerAddress();
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.main_content,CustomerAddress,null).addToBackStack(null).commit();
getActivity().setTitle("Shipping");
}
}
else
Toast.makeText(getActivity(),"Cart is Empty",Toast.LENGTH_LONG).show();
}
};
// Image urls used in LazyImageLoadAdapter.java file
public class getDataTask extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
if (pdialog==null){
pdialog=new ProgressDialog(getActivity());
pdialog.setMessage("Loading...");
pdialog.setCanceledOnTouchOutside(getRetainInstance());
pdialog.setCancelable(false);
pdialog.show();
}
}
@Override
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
// parse json data from server in background
if (!Constants.ProductCart_Id.isEmpty()){
parseJSONData();
run=1;
}else{
run=0;
}
//Get Product Prices
return null;
}
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
// Create custom adapter for listview
if (run==1) {
String[] images = new String[Constants.Product_image.size()];
images = Constants.Product_image.toArray(images);
adapter = new CartImageLoadAdapter(getActivity(), images);
//Set adapter to listview
list2.setAdapter(adapter);
if (pdialog.isShowing()) {
pdialog.dismiss();
pdialog = null;
}
}else{
if (pdialog.isShowing()) {
pdialog.dismiss();
pdialog = null;
}
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle("Cart is Empty").setMessage("Start Shopping now !!").create().show();
run=0;
}
// if internet connection and data available show data on list
// otherwise, show alert text
// btn_place_order.setText(String.format("Total: %.2f Place Order", TotalPrice));
btn_place_order.setText(String.format("%.2f ", TotalPrice));
TotalProductCartPrice= btn_place_order.getText().toString();
}
}
// method to parse json data from server
public void parseJSONData(){
HttpClient Client = new DefaultHttpClient();
// Create URL string
String URL = "http://prashant.com/customApi/cartDetails.php?cartId="+Constants.cartId;
//Log.i("httpget", URL);
JSONParser parser =new JSONParser();
try
{
String SetServerString = "";
// Create Request to server and get response
HttpGet httpget = new HttpGet(URL);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
SetServerString = Client.execute(httpget, responseHandler);
Constants.Login=SetServerString;
JSONArray array=new JSONArray(SetServerString);
for (int i = 0; i < array.length(); i++) {
JSONObject obj=array.getJSONObject(i);
Constants.Product_ID.add(Long.parseLong(obj.getString("productId")));
Constants.Product_name.add(obj.getString("name"));
Double price= Double.valueOf(obj.getString("price"));
int Qty= Integer.parseInt(obj.getString("qty"));
Constants.Product_price.add(price*Qty);
Constants.Product_image.add(obj.getString("imageurl"));
Constants.Product_qty.add(Integer.valueOf(obj.getString("qty")));
Constants.Product_specialPrice.add((Double.valueOf(obj.getString("spprice")))*Qty);
// Total Sum of Cart Item price
TotalPrice += Double.valueOf(Double.valueOf(obj.getString("spprice"))*Qty);
}
// Show response on activity
}
catch(Exception ex)
{
}
}
public static ActivityCart getInstance() {
return sActivityCart;
}
public void SyncCart(){
// Call Shipping Information Function
ActivityCart SyncCart=new ActivityCart();
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.main_content,SyncCart,null).addToBackStack(null).commit();
getActivity().setTitle("Cart");
}
}