我目前正在测试一些代码以便与android编程一起使用。我在这里找到了一些测试项目：http://www.androidhive.info/2012/05/how-to-connect-android-with-php-mysql/
但问题是，我可以毫无问题地阅读数据库，但功能不适用于POST只有GET。因此，当我尝试添加新产品时，它会对我的php脚本执行请求，但根本没有POST数据。我用这种方式测试了它：
<?php
header("content-type:application/json; charset=UTF-8");
//print("fda");
/*
* Following code will create a new product row
* All product details are read from HTTP Post Request
*/
// array for JSON response
$response = array();
// check for required fields
//if (isset($_POST['name']) && isset($_POST['price']) && isset($_POST['description'])) {
//if (isset($_POST['name'])){
$name = "test";//$_POST['name'];
$price = 123; //$_POST['price'];
$description = "desc"; //$_POST['description'];
foreach ($_POST as $key => $value)
$data = $data." Field ".htmlspecialchars($key)." is ".htmlspecialchars($value);
// include db connect class
//echo $data;
$url = $_SERVER['REQUEST_URI'];
require_once __DIR__ . '/db_connect.php';
// connecting to db
$db = new DB_CONNECT();
// mysql inserting a new row
$result = mysql_query("INSERT INTO products(name, price, description, url) VALUES('$name', '$price', '$description','$data')");
// check if row inserted or not
if ($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);
//}
?>
如您所见，我将POST数据发布到数据库中。当我使用我自己的基于web的测试脚本时，它可以很好地工作，并在数据库中显示POST数据。
所以我的android代码似乎并没有真正发送POST数据，因为当我添加产品但是使用testvars offcourse时它会在数据库中添加一行。问题是，当我从手机执行时，数据库中的最后一个字段（url或更好的参数）将保持为空。
以下是android应用程序的代码：
package com.example.androidhive;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class NewProductActivity extends Activity {
// Progress Dialog
private ProgressDialog pDialog;
JSONParser jsonParser = new JSONParser();
EditText inputName;
EditText inputPrice;
EditText inputDesc;
// url to create new product
private static String url_create_product = "http://www.supergeilebus.nl/android_connect/create_product.php/";
// JSON Node names
private static final String TAG_SUCCESS = "success";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add_product);
// Edit Text
inputName = (EditText) findViewById(R.id.inputName);
inputPrice = (EditText) findViewById(R.id.inputPrice);
inputDesc = (EditText) findViewById(R.id.inputDesc);
// Create button
Button btnCreateProduct = (Button) findViewById(R.id.btnCreateProduct);
// button click event
btnCreateProduct.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// creating new product in background thread
new CreateNewProduct().execute();
}
});
}
/**
* Background Async Task to Create new product
* */
class CreateNewProduct extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(NewProductActivity.this);
pDialog.setMessage("Creating Product..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Creating product
* */
protected String doInBackground(String... args) {
String name = inputName.getText().toString();
String price = inputPrice.getText().toString();
String description = inputDesc.getText().toString();
// 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));
// getting JSON Object
// Note that create product url accepts POST method
JSONObject json = jsonParser.makeHttpRequest(url_create_product,"POST", params);
// check log cat fro response
Log.d("Create Response", json.toString());
// check for success tag
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully created product
Intent i = new Intent(getApplicationContext(), AllProductsActivity.class);
startActivity(i);
// closing this screen
finish();
} else {
// failed to create product
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog once done
pDialog.dismiss();
}
}
}
我希望有人可以帮助我。我没有选择。当我将所有内容改为GET时，它完美无缺。我知道由于sql注入它编码很差，但我只是想了解这一点。
向我的坏英语致意并抱歉
答案 0 :(得分：0)
Hi User i使用以下代码来调用发布到Web服务。它可能有助于你。
**public String doPost(Activity activity, String urlString, String method, String value)
throws ClientProtocolException, IOException
{
String responseString="";
HttpURLConnection urlConnection = null;
retryCount++;
try
{
URL url = new URL(urlString+method);
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("POST");
urlConnection.setRequestProperty("Content-Type", "application/json");
urlConnection.setRequestProperty("Content-Length",value.length()+"" );
urlConnection.setDoInput( true );
urlConnection.setDoOutput( true );
DataOutputStream dos = new DataOutputStream( urlConnection.getOutputStream() );
byte[] bs = value.getBytes();
Log.d(tag, "Sending JSON String ->"+new String(bs));
dos.write(bs);
dos.flush();
dos.close();
Log.d(tag,"Responce ->"+urlConnection.getResponseMessage());
if(urlConnection.getResponseMessage().toLowerCase().equals("ok"))
{
InputStream is = urlConnection.getInputStream();
int ch;
StringBuffer b =new StringBuffer();
while( ( ch = is.read() ) != -1 )
{
b.append( (char)ch );
}
responseString = b.toString();
Log.d(tag,method + "','" + responseString);
return method + "','" + responseString;
}
else
{
Log.d(tag, tag1+urlConnection.getResponseMessage());
}
dos.close();
}
catch (SocketException e)
{
Log.d(tag, tag1+e);
}
catch (Exception e)
{
Log.e(tag,"-->"+ e);
}
return "";
}**
这里urlString和方法制作了Web服务方法的完整URL。