我有一个简单的android应用程序，我正在使用http请求和php mysql 但是LogCat显示的问题是php文件的路径有错误。
任何人都可以帮我解决这个问题吗？
10-15 16:42:03.380: I/dalvikvm(1596): threadid=3: reacting to signal 3
10-15 16:42:03.530: I/dalvikvm(1596): Wrote stack traces to '/data/anr/traces.txt'
10-15 16:42:03.860: D/gralloc_goldfish(1596): Emulator without GPU emulation detected.
10-15 16:42:03.880: I/dalvikvm(1596): threadid=3: reacting to signal 3
10-15 16:42:03.890: I/dalvikvm(1596): Wrote stack traces to '/data/anr/traces.txt'
10-15 16:42:08.550: E/Error befor http(1596): Error before the http request
10-15 16:42:08.890: E/Student Data(1596): <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
10-15 16:42:08.890: E/Student Data(1596): <html><head>
10-15 16:42:08.890: E/Student Data(1596): <title>404 Not Found</title>
10-15 16:42:08.890: E/Student Data(1596): </head><body>
10-15 16:42:08.890: E/Student Data(1596): <h1>Not Found</h1>
10-15 16:42:08.890: E/Student Data(1596): <p>The requested URL /studentservice/StudentService/getStudentByID.php was not found on this server.</p>
10-15 16:42:08.890: E/Student Data(1596): </body></html>
10-15 16:42:08.940: I/dalvikvm(1596): threadid=3: reacting to signal 3
10-15 16:42:08.960: I/dalvikvm(1596): Wrote stack traces to '/data/anr/traces.txt'
10-15 16:42:09.440: I/dalvikvm(1596): threadid=3: reacting to signal 3
10-15 16:42:09.450: I/dalvikvm(1596): Wrote stack traces to '/data/anr/traces.txt'
package com.lebdev.fitguide.controller;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
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 android.util.Log;
public class HttpManager {
private InputStream inputStream;
private HttpClient httpClient;
private HttpResponse httpResponse;
private HttpPost httpPost;
private HttpEntity httpEntity;
private StringBuilder result;
public HttpManager() {
this.inputStream = null;
this.httpClient = null;
this.httpResponse = null;
this.httpPost = null;
this.httpEntity = null;
this.result = null;
}
public String getResponseFromURL(String url, List<NameValuePair> params) {
try {
httpClient = new DefaultHttpClient();
httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
httpResponse = httpClient.execute(httpPost);
httpEntity = httpResponse.getEntity();
inputStream = httpEntity.getContent();
} catch (Exception ex) {
ex.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
inputStream, "UTF-8"), 8);
result = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
result.append(line + "\n");
}
inputStream.close();
return result.toString();
} catch (Exception ex) {
Log.e("Bufferring Error, ", ex.getMessage());
}
return null;
}
}
package com.lebdev.fitguide.om;
import java.util.ArrayList;
import java.util.List;
import org.json.JSONObject;
import android.util.Log;
import com.lebdev.fitguide.businessModel.Student;
public class JsonObjectMapper {
public static Student jsonToStudent(JSONObject jsonObject) {
Student std = null;
try {
std = new Student(jsonObject.getJSONArray("Student")
.getJSONObject(0).getString("Name"),
Integer.parseInt(jsonObject.getJSONArray("Student")
.getJSONObject(0).getString("Index")),
Integer.parseInt(jsonObject.getJSONArray("Student")
.getJSONObject(0).getString("ID")));
} catch (Exception ex) {
Log.e("Error Json Converter", ex.getMessage());
}
return std;
}
public static List<Student> jsonToStudentList(JSONObject jsonObject) {
List<Student> stdList = new ArrayList<Student>();
try {
for (int i = 0; i < jsonObject.getJSONArray("Student").length(); i++) {
stdList.add(new Student(jsonObject.getJSONArray("Student")
.getJSONObject(i).getString("Name"), Integer
.parseInt(jsonObject.getJSONArray("Student")
.getJSONObject(i).getString("Index")), Integer
.parseInt(jsonObject.getJSONArray("Student")
.getJSONObject(i).getString("ID"))));
}
} catch (Exception ex) {
Log.e("Error Json Converter", ex.getMessage());
}
return stdList;
}
}
package com.lebdev.fitguide.activities;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONObject;
import com.lebdev.fitguide.businessModel.Student;
import com.lebdev.fitguide.controller.HttpManager;
import com.lebdev.fitguide.controller.JSONParser;
import com.lebdev.fitguide.om.JsonObjectMapper;
import android.app.Activity;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.view.Menu;
import android.widget.TextView;
import android.widget.Toast;
public class SecondaryActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_secondary);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("sid", "2"));
Log.e("Error befor http", "Error before the http request");
/*
JSONObject jsonObj = JSONParser
.parseJSONFromString(new HttpManager()
.getResponseFromURL(
"http://10.0.2.2/studentservice/StudentService/getStudentByID.php",
params));
Log.e("Error after http", "Error after the http request");
Student std = JsonObjectMapper.jsonToStudent(jsonObj);
Log.e("STUDENT DATA", "ID:" + std.getID() + "Name:" + std.getName());
*/
HttpManager httpManager = new HttpManager();
String result = httpManager.getResponseFromURL("http://10.0.2.2/studentservice/StudentService/getStudentByID.php",
params);
Log.e("Student Data", result);
/*
Bundle bundle = getIntent().getExtras();
if (bundle != null) {
TextView lblMessage = (TextView) findViewById(R.id.lblSentMessage);
Student student = bundle.getParcelable("Student");
lblMessage.setText("I 've recieved a student with a name "
+ student.getName() + " and has a Subject "
+ student.getSubjects().get(0).getName() + " with a grade "
+ student.getSubjects().get(0).getGrade());
}
*/
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.secondary, menu);
return true;
}
}
<?php
require_once '../ConnectionManager.php';
$response = array();
$db = connectionManager::getInstance();
if(isset($_POST["sid"]))
{
$id = $_POST["sid"];
$result = mysql_query("SELECT * FROM student WHERE ID = $id");
if(!empty($result))
{
if(mysql_num_rows($result) >0)
{
$row = mysql_fetch_array($result);
$student = array();
$student["ID"] = $row["ID"];
$student["Index"] = $row["Index"];
$student["Name"] = $row["Name"];
$response ["success"] = 1;
$response["student"] = array();
array_push($response["student"], $student);
echo json_encode($response);
}
else
{
$response["success"] = 0;
$response["message"] = "No Student found with this ID!!";
echo json_encode($response);
}
}
else
{
$response["success"] = 0;
$response["message"] = "No Student found with this ID!!";
echo json_encode($response);
}
}
else
{
$response["success"] = 0;
$response["message"] = "Required feild(s) is missing!!";
echo json_encode($response);
}
?>
答案 0 :(得分：4)
404表示找不到请求的页面。所以我猜测如果你在网络浏览器上请求相同的URL，那么你会得到同样的错误。
即。
http://10.0.2.2/studentservice/StudentService/getStudentByID.php
也会产生404错误。您确定网址是否正确？也许你有一个studenservice太多？