我将php文件和数据库上传到000webhost.com。当我在localhost中测试时，我的adnroid应用程序工作正常。但在我将我的网址更改为“http://utyatanarponcybercity.000webhostapp.com/public_html/memberLogin.php”后，它开始显示“解析数据时出错org.json.JSONException：Value
这是memberlogin.php
<?php
$response = array();
if($_POST['user_name']==NULL || $_POST['password']==NULL) {
// required field is missing
$response["success"] = 0;
$response["message"] = "Required field(s) is missing";
//$response["usertype"]="null";
// echoing JSON response
echo json_encode($response);
}
else{
$uname=$_POST['user_name'];
$pas=$_POST['password'];
// include db connect class
require_once __DIR__ . '/db_connect.php';
// connecting to db
$db = new DB_CONNECT();
$result = mysql_query("SELECT * FROM user_account WHERE user_name='$uname' && password='$pas'") or die(mysql_error());
$row = mysql_fetch_array($result);
$no=mysql_num_rows($result);
if($no ==0){
$response["success"]=0;
$response["message"]="Username or Password Incorrect";
$response["usertype"]="null";
// echoing JSON response
echo json_encode($response);
} else {
$utype = $row["user_type"];
$cId = $row["classID"];
$uId= $row["userID"];
// successfully login
$response["success"] = 1;
$response["message"] = "Successfully login.";
$response["usertype"]=$utype;
$response["classID"]=$cId;
$response["userID"]=$uId;
echo json_encode($response);
}
}
?>
这是MainActivity.class
package com.example.utyccschedulefinal;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity {
// Progress Dialog
private ProgressDialog pDialog1;
JSONParser jsonParser = new JSONParser();
EditText uName;
EditText pass;
String existingInput;
private static String url = "http://utyatanarponcybercity.000webhostapp.com/public_html/memberLogin.php";
private static JSONObject json;
private static String type,classid,userid,startdate,enddate;
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_USERTYPE = "usertype";
public enum Command {Admin,Member};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Edit Text
uName = (EditText) findViewById(R.id.username);
pass = (EditText) findViewById(R.id.password);
// Create button
Button login = (Button) findViewById(R.id.btnLogin);
String checkLogin=checkFile("Login.txt");
if(checkLogin.equals("yes")) {
Intent in = new Intent(MainActivity.this,
userPage.class);
in.putExtra("classid", classid);
startActivity(in);
finish();
}
// button click event
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// creating new product in background thread
new userLogin().execute();
}
});
}
private String checkFile(String s) {
FileInputStream input=null;
try {
input=this.openFileInput(s);
int maxBytes=input.available();
byte[] data=new byte[maxBytes];
input.read(data,0,maxBytes);
while(input.read()!=-1){};
existingInput=new String(data);
//textmsg.setText(existingInput);
}
catch (Exception e) {
e.printStackTrace();
}
finally{
if(input==null){
existingInput="Start";
}
else{
try {
input.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
return existingInput;
}
private void writefile(String a,String b) {
try {
FileOutputStream output=openFileOutput(a, MODE_PRIVATE);
byte[] data=b.getBytes();
output.write(data);
output.close();
//display file saved message
Toast.makeText(getBaseContext(), "File saved successfully!",
Toast.LENGTH_SHORT).show();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Background Async Task to Create new product
* */
class userLogin extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog1 = new ProgressDialog(MainActivity.this);
pDialog1.setMessage("Logging In..");
pDialog1.setIndeterminate(false);
pDialog1.setCancelable(true);
pDialog1.show();
}
/**
* Creating product
* */
protected String doInBackground(String... args) {
String name = uName.getText().toString();
String password = pass.getText().toString();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("user_name", name));
params.add(new BasicNameValuePair("password", password));
Log.d("work", "first");
// getting JSON Object
// Note that create product url accepts POST method
json = jsonParser.makeHttpRequest(url, "POST", params);
Log.d("work", "second");
// check log cat for response
Log.d("Create Response", json.toString());
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// check for success tag
try {
int success = json.getInt(TAG_SUCCESS);
classid= json.getString("classID");
userid=json.getString("userID");
startdate=json.getString("startdate");
enddate=json.getString("enddate");
if (success == 1){
type = json.getString(TAG_USERTYPE);
Log.d("userType", type);
String file1="classid.txt";
String file2="notification.txt";
String file3="userid.txt";
writefile(file1,classid);
writefile(file2,"true");
writefile(file3,userid);
writefile("start.txt",startdate);
writefile("end.txt",enddate);
writefile("Login.txt","yes");
Log.d("Create response","user work");
Intent in = new Intent(MainActivity.this,
userPage.class);
in.putExtra("classid", classid);
startActivity(in);
finish();
}
else {
// failed to login
type = json.getString("message");
Toast.makeText(getApplicationContext(), type, Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
e.printStackTrace();
}
// dismiss the dialog once done
pDialog1.dismiss();
}
}
}
这是JSONParser.class
package com.example.utyccschedulefinal;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;
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.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
// function get json from url
// by making HTTP POST or GET mehtod
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if (method == "POST") {
// request method is POST
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} else if (method == "GET") {
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
答案 0 :(得分：2)
您提供的链接不正确。 试试http://utyatanarponcybercity.000webhostapp.com/memberLogin.php
您必须删除 public_html ，因为它是托管您网站的服务器中的目录。 （根目录）