这是一个包含RecyclerView的类。我想要的是，当我对列表的任何对象执行leftSwipe时，它应该对本地主机PHP页面进行POST调用，该页面将滑动对象的值作为条目添加到MYSQL数据库中的表。但是，我的ServiceHandler类无法将变量传递给PHP页面来添加条目。
public class ProductAdapter extends RecyclerView.Adapter<ProductAdapter.ViewHolder> {
private ArrayList<ProductInfo> inf;
ProductAdapter selfRef=this;
String url_add_product = "http://10.0.2.2/FinalProject/add_basket_product.php";
private ProgressDialog pDialog;
private static final String TAG_SUCCESS = "success";
public String nm,pr,dis,st;
//helper method to get ProductInfo object
private ProductInfo getInfo(String name){
ProductInfo pinfo=null;
for(ProductInfo x:inf){
if(x.getName().equalsIgnoreCase(name))
pinfo=x;
}
return pinfo;
}
public class ViewHolder extends RecyclerView.ViewHolder {
TextView pName;
TextView pPrice;
TextView aDistance;
TextView aStore;
private Context ctx=null;
OnSwipeTouchListener onSwipeTouchListener;
ProductInfo p;
public ViewHolder(final View view){
super(view);
ctx=view.getContext();
pName = (TextView) view.findViewById(R.id.selected_prod_name);
pPrice = (TextView) view.findViewById(R.id.selected_prod_price);
aDistance = (TextView) view.findViewById(R.id.product_distance);
aStore = (TextView) view.findViewById(R.id.product_store);
onSwipeTouchListener=(new OnSwipeTouchListener(ctx) {
public void onSwipeTop() {
Toast.makeText(ctx, "top", Toast.LENGTH_SHORT).show();
}
public void onSwipeRight() {
Toast.makeText(ctx, "right", Toast.LENGTH_SHORT).show();
}
public void onSwipeLeft() {
Toast.makeText(ctx, "Added to cart", Toast.LENGTH_SHORT).show();
// p.setName(pName.getText().toString());
nm=(pName.getText().toString());
// p.setPrice(Double.parseDouble(pPrice.getText().toString()));
pr=(pPrice.getText().toString());
// p.setDistance(Double.parseDouble(aDistance.getText().toString()));
dis=aDistance.getText().toString();
// p.setStore(aStore.getText().toString());
st=aStore.getText().toString();
// add product to Basket activity
// String jsonStr="";
// ServiceHandler sh = new ServiceHandler();
/* List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("name", pinfo.getName()));
params.add(new BasicNameValuePair("price", Double.toString(pinfo.getPrice())));
params.add(new BasicNameValuePair("description", pinfo.getName()));
params.add(new BasicNameValuePair("location", pinfo.getStore()));
params.add(new BasicNameValuePair("distance", Double.toString(pinfo.getDistance())));
jsonStr=sh.makeServiceCall(url_add_product,ServiceHandler.POST,params); */
new CreateNewProduct().execute();
}
public void onSwipeBottom() {
Toast.makeText(ctx, "bottom", Toast.LENGTH_SHORT).show();
}
@Override
public void onClick() {
super.onClick();
Intent i;
ProductInfo pinfo= getInfo(pName.getText().toString());
Toast.makeText(view.getContext(),pName.getText().toString(),Toast.LENGTH_LONG).show();
String name=pinfo.getName();
String price=Double.toString(pinfo.getPrice());
String store=pinfo.getStore();
String dist=Double.toString(pinfo.getDistance());
i=new Intent(ctx,ProductLocation.class);
Bundle b=new Bundle();
b.putString("PROD_NAME",name);
b.putString("PROD_PRICE",price);
b.putString("PROD_STORE",store);
b.putString("PROD_DIST",dist);
i.putExtras(b);
view.getContext().startActivity(i);
}
});
//To set onClick Listener for each item which is held by ViewHolder
view.setOnTouchListener(onSwipeTouchListener);
}
class CreateNewProduct extends AsyncTask<String, String, String> {
String name;
String price;
String location;
String distance;
String description;
/**
* Before starting background thread Show Progress Dialog
*/
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(ctx);
pDialog.setMessage("Creating Product..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
name =nm;// p.getName();
price =pr;// Double.toString(p.getPrice());
location=st ;// p.getStore();
distance=dis;//Double.toString(p.getDistance());
description = "yellow";// p.getName();
}
/**
* Creating product
*/
protected String doInBackground(String... args) {
String jsonStr="";
try {
ServiceHandler sh = new ServiceHandler();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("name", name));
params.add(new BasicNameValuePair("price", price));
params.add(new BasicNameValuePair("description", description));
params.add(new BasicNameValuePair("location", location));
params.add(new BasicNameValuePair("distance", distance));
Log.d("Create Response", name);
jsonStr = sh.makeServiceCall(url_add_product, ServiceHandler.POST, params);
// check log cat fro response
Log.d("Create Response", jsonStr.toString());
}catch(Exception e){
}
// check for success tag
return "success";
}
/**
* After completing background task Dismiss the progress dialog
**/
protected void onPostExecute(Void result) {
// dismiss the dialog once done
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
}
}
}
public ProductAdapter(ArrayList<ProductInfo> prinfo){
this.inf = prinfo;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType){
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.product_card,parent,false);
return new ViewHolder(itemView);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position){
ProductInfo product = inf.get(position);
holder.pName.setText(product.getName());
double n = product.getPrice();
String s = String.valueOf(n) + " HKD";
holder.pPrice.setText(s);
double m = product.getDistance();
String q = String.valueOf(m) + " KM";
holder.aDistance.setText(q);
holder.aStore.setText(product.getStore());
}
@Override
public int getItemCount(){
return inf.size();
}
}
我的ServiceHandler类如下：
package com.example.dayle_fernandes.final_project;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.List;
public class ServiceHandler {
static String response = null;
public final static int GET = 1;
public final static int POST = 2;
public ServiceHandler() {
}
/**
* Making service call
* @url - url to make request
* @method - http request method
* */
public String makeServiceCall(String url, int method) {
return this.makeServiceCall(url, method, null);
}
/**
* Making service call
* @url - url to make request
* @method - http request method
* @params - http request params
* */
public String makeServiceCall(String url, int method,
List<NameValuePair> params) {
try {
// http client
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpEntity httpEntity = null;
HttpResponse httpResponse = null;
// Checking http request method type
if (method == POST) {
HttpPost httpPost = new HttpPost(url);
// adding post params
if (params != null) {
httpPost.setEntity(new UrlEncodedFormEntity(params));
}
httpResponse = httpClient.execute(httpPost);
return "success";
} else if (method == GET) {
// appending params to url
if (params != null) {
String paramString = URLEncodedUtils
.format(params, "utf-8");
url += "?" + paramString;
}
HttpGet httpGet = new HttpGet(url);
httpResponse = httpClient.execute(httpGet);
}
httpEntity = httpResponse.getEntity();
response = EntityUtils.toString(httpEntity);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return response;
}
}
我的PHP文件add_basket_product.php是
<?php
// array for JSON response
$response = array();
// check for required fields
if (isset($_POST['name']) && isset($_POST['price']) && isset($_POST['description']) && isset($_POST['location']) && isset($_POST['distance'])) {
$name = $_POST['name'];
$price = $_POST['price'];
$description = $_POST['description'];
$location = $_POST['location'];
$distance = $_POST['distance'];
$created_at = $_POST['created_at'];
$updated_at = $_POST['updated_at'];
// include db connect class
require_once __DIR__ . '/db_connect.php';
// connecting to db
$db = new DB_CONNECT();
// mysql inserting a new row
$result = mysql_query("INSERT INTO products(name, price, location, distance, description) VALUES('$name', '$price', '$location', '$distance', '$description')");
// check if row inserted or not
if ($result) {
// successfully inserted into database
$response["success"] = 1;
$response["message"] = "Product successfully created.";
// echoing JSON response
echo json_encode($response);
} else {
// failed to insert row
$response["success"] = 0;
$response["message"] = "Oops! An error occurred.";
// echoing JSON response
echo json_encode($response);
}
} else {
// required field is missing
$response["success"] = 0;
$response["message"] = "Required field(s) is missing";
// echoing JSON response
echo json_encode($response);
}
?>
我不知道为什么不通过。在doInBackground（）中的Log活动 - Log.d（“Create Response”，name）; ，我可以看到我可以访问名称，但无法将其传递给php文件