Java 如何更新购物车中商品数量的数据库值？
我有一个Android购物应用程序，可以根据库存中产品的可用性来购买产品。最后，我需要扣除购物车上的产品数量，并更新数据库中该商品的数量。问题是，它当前更新了购物车中最后一个项目的数量的数据库值。如何使其更新购物车中商品数量的所有数据库值？。请有人帮帮我。下面是执行此操作的类的代码Java 如何更新购物车中商品数量的数据库值？,java,android,Java,Android,我有一个Android购物应用程序，可以根据库存中产品的可用性来购买产品。最后，我需要扣除购物车上的产品数量，并更新数据库中该商品的数量。问题是，它当前更新了购物车中最后一个项目的数量的数据库值。如何使其更新购物车中商品数量的所有数据库值？。请有人帮帮我。下面是执行此操作的类的代码 public class Thirdscreen extends Activity { private static String url = "http://10.0.2.2/bootstrap-dist/pos
public class Thirdscreen extends Activity {
private static String url = "http://10.0.2.2/bootstrap-dist/postingdata.php";
// Progress Dialog
private ProgressDialog pDialog;
// Json parser object
JSONParser jsonParser = new JSONParser();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.thirdscreen);
// final getQuantity getQan=new getQuantity();
TextView showCartContent = (TextView) findViewById(R.id.showCart);
TextView showCarttotal = (TextView) findViewById(R.id.showtotal);
Button btn = (Button) findViewById(R.id.subtractQuantity);
final Controller aController = (Controller) getApplicationContext();
int cartSize = aController.getCart().getCartSize();
String showString = "";
int total = 0;
for (int i = 0; i < cartSize; i++) {
final String pName = aController.getCart().getProducts(i)
.getProductName();
int pPrice = aController.getCart().getProducts(i).getProductPrice();
final int quantity = aController.getCart().getProducts(i)
.getProductQuantity();
final int dataProQuantityStore = aController.getCart()
.getProducts(i).getDatabaseProductQuantity();
String pDisc = aController.getCart().getProducts(i)
.getProductDesc();
total = total + (pPrice * quantity);
showString += "\n\nProduct Name : " + pName + "\n" + "Price : "
+ pPrice + "\t" + "Quantity: " + quantity + "\n"
+ "Discription : " + pDisc + ""
+ "\n -----------------------------------";
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
int finalVal = dataProQuantityStore - quantity;
String finalstringValue=""+finalVal;
new getQuantity(pName,finalstringValue).execute();
}
});
}
showCarttotal.setText("Your Total is: " + total + "Tk");
showCartContent.setText(showString);
}
class getQuantity extends AsyncTask<String, String, String> {
public String productName;
public String productQuantity;
public getQuantity(String pn,String pq){
productName=pn;
productQuantity=pq;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Thirdscreen.this);
pDialog.setMessage("Processing you request..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected String doInBackground(String... params) {
// getting JSON Object
// Note that create product url accepts POST method
// add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("name", productName));
nameValuePairs.add(new BasicNameValuePair("pQuantity", productQuantity));
jsonParser.getandpostJSONFromUrl(url, "POST",nameValuePairs);
return null;
}
@Override
protected void onPostExecute(String file_url) {
// dismiss the dialog once done
pDialog.dismiss();
}
}