解析数据时出错 Org.Json.JSONException：字符处输入结束答案

【问题标题】：Error Parsing Data Org.Json.JSONException: End Of Input At Charac解析数据时出错 Org.Json.JSONException：字符处输入结束
【发布时间】：2015-04-17 16:19:31
【问题描述】：

我正在尝试通过 Eclipse 上的 android 应用程序连接到本地主机上的数据库。（我对这一切都很陌生）。我的代码没有错误，但是当我运行应用程序并输入我的详细信息并点击“保存”Button 时，应用程序停止响应并给出以下错误

Error Parsing Data Org.Json.JSONException: End Of Input At Charac

我不确定错误问题是与我的 Json 数组还是我的实际 php 文件有关。我在网上看到了很多类似的问题，但仍然没有找到解决办法，有人可以建议我尝试吗？

我的班级是：

package com.example.independentretailers;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;

import com.example.independentretailers.R;
import android.app.Activity; 
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle; 
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class retailersignup extends Activity {
private ProgressDialog pDialog;

JSONParser jsonParser = new JSONParser();

EditText etRetailName, etTypeofBusiness, etLocation, etGPS, etPhoneNumber,    etEmail, etPassword;
Button bSave;

private static String url_create_reatiler = "http://10.0.2.2/tutorial2.php";

private static final String TAG_SUCCESS = "success";

//  @SuppressLint("NewApi")
@Override
protected void onCreate (Bundle savedInstanceState){
    super.onCreate(savedInstanceState);

    //setup strict mode policy 
 //     StrictMode.ThreadPolicy policy = new    StrictMode.ThreadPolicy.Builder().permitAll().build();
//      StrictMode.setThreadPolicy(policy);
    setContentView(R.layout.retailersignup);
    //for Retail name
    etRetailName = (EditText) findViewById(R.id.editText1);
    //for type of business 
    etTypeofBusiness = (EditText) findViewById(R.id.editText2);
    //for Location
    etLocation = (EditText) findViewById(R.id.editText3);
    //for GPS
    etGPS = (EditText) findViewById(R.id.editText4); 
    //for Phone Number
    etPhoneNumber = (EditText) findViewById(R.id.editText5);
    //for email
    etEmail = (EditText) findViewById(R.id.editText6);
    //for password
    etPassword = (EditText) findViewById(R.id.editText7);
    //setting up ID for the button 
    bSave = (Button) findViewById(R.id.button1);
    //setting up onclick listener 
    bSave.setOnClickListener(new View.OnClickListener(){


        InputStream is = null;
        @Override 
        public void onClick(View arg0){
                 new CreateNewRetailer().execute();
        }
    });
  }

class CreateNewRetailer extends AsyncTask<String, String, String>{ 

protected String doInBackground(String...args){
            //storing values inside edit texts inside strings 
            String RetailName = etRetailName.getText().toString();
            String TypeofBusiness = etTypeofBusiness.getText().toString(); 
            String Location = etLocation.getText().toString();
            String GPS = etGPS.getText().toString();
            String PhoneNumber = etPhoneNumber.getText().toString(); 
            String Email = etEmail.getText().toString(); 
            String Password = etPassword.getText().toString(); 

            //setting name pair values 
            List<NameValuePair> nameValuePairs = new     ArrayList<NameValuePair>();
            //adding string values inside the name value pairs 
            nameValuePairs.add(new BasicNameValuePair("Retail Name",    RetailName));
            nameValuePairs.add(new BasicNameValuePair("Type of Business",   TypeofBusiness));
            nameValuePairs.add(new BasicNameValuePair("Location", Location));
            nameValuePairs.add(new BasicNameValuePair("GPS", GPS));
            nameValuePairs.add(new BasicNameValuePair("Phone Number", PhoneNumber));
            nameValuePairs.add(new BasicNameValuePair("Email", Email));
            nameValuePairs.add(new BasicNameValuePair("Password", Password));

            JSONObject json = jsonParser.makeHttpRequest     (url_create_reatiler, "POST", nameValuePairs);
            //setting up the connection inside the try catch 

            try{ 
                //setting up the default client
                int success = json.getInt(TAG_SUCCESS);
            }
                catch(JSONException e){
                    e.printStackTrace();
                }

 return null;
}

protected void onPostExcute(String file_url){
pDialog.dismiss();

}
}
}

我的 JsonParser 类是：包 com.example.independentretailers;

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;

 }
}

<?php 

$response = array();

$con=mysql_connect("localhost", "root");
mysql_select_db("independentretailers",$con); 

if (isset($_POST['Retail Name']) && isset($_POST['Type of Business']) &&   isset($_POST['Location'])&& isset($_POST['GPS'])&& isset($_POST['Phone    Number'])&& isset($_POST['Email'])&& isset($_POST['Password'])) {


$RetailName = $_POST['Retail Name']; 
$TypeofBusiness = $_POST['Type of Business'];
$Location = $_POST['Location'];
$GPS = $_POST['GPS'];
$PhoneNumber = $_POST['Phone Number'];
$Email = $_POST['Email'];
$Password = $_POST['Password'];

$result = mysql_query("INSERT INTO retailer(Retail Name, Type of Business,    Location, GPS, Phone Number, Email, Password)    VALUES('$RetailName','$TypeofBusiness','$Location','$GPS','$PhoneNumber','$Email    ','$Password')");

// 检查行是否插入如果（$结果）{ // 成功插入数据库 $response["成功"] = 1; $response["message"] = "零售商成功创建。";

    // 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);
}
?>

我的完整 logcat 错误是：

04-17 15:45:54.393: D/dalvikvm(555): Not late-enabling CheckJNI (already on)
04-17 15:45:55.263: I/dalvikvm(555): threadid=3: reacting to signal 3
04-17 15:45:55.393: I/dalvikvm(555): Wrote stack traces to '/data/anr/traces.txt'
04-17 15:45:55.775: I/dalvikvm(555): threadid=3: reacting to signal 3
04-17 15:45:55.854: I/dalvikvm(555): Wrote stack traces to '/data/anr/traces.txt'
04-17 15:45:56.264: I/dalvikvm(555): threadid=3: reacting to signal 3
04-17 15:45:56.354: I/dalvikvm(555): Wrote stack traces to '/data/anr/traces.txt'
04-17 15:45:56.635: D/gralloc_goldfish(555): Emulator without GPU emulation detected.
04-17 15:45:56.763: I/dalvikvm(555): threadid=3: reacting to signal 3
04-17 15:45:56.863: I/dalvikvm(555): Wrote stack traces to '/data/anr/traces.txt'
04-17 15:47:12.763: I/dalvikvm(555): threadid=3: reacting to signal 3
04-17 15:47:12.783: I/dalvikvm(555): Wrote stack traces to '/data/anr/traces.txt'
04-17 15:47:15.883: D/dalvikvm(555): GC_CONCURRENT freed 169K, 5% free 6749K/7047K, paused 8ms+6ms
04-17 15:47:32.033: D/dalvikvm(555): GC_CONCURRENT freed 386K, 8% free 6785K/7303K, paused 5ms+26ms
04-17 15:47:37.123: E/JSON Parser(555): Error parsing data org.json.JSONException: End of input at character 0 of 
04-17 15:47:37.123: W/dalvikvm(555): threadid=11: thread exiting with uncaught exception (group=0x409c01f8)
04-17 15:47:37.166: E/AndroidRuntime(555): FATAL EXCEPTION: AsyncTask #1
04-17 15:47:37.166: E/AndroidRuntime(555): java.lang.RuntimeException: An error occured while executing doInBackground()
04-17 15:47:37.166: E/AndroidRuntime(555):  at android.os.AsyncTask$3.done(AsyncTask.java:278)
04-17 15:47:37.166: E/AndroidRuntime(555):  at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
04-17 15:47:37.166: E/AndroidRuntime(555):  at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
04-17 15:47:37.166: E/AndroidRuntime(555):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
04-17 15:47:37.166: E/AndroidRuntime(555):  at java.util.concurrent.FutureTask.run(FutureTask.java:137)
04-17 15:47:37.166: E/AndroidRuntime(555):  at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
04-17 15:47:37.166: E/AndroidRuntime(555):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
04-17 15:47:37.166: E/AndroidRuntime(555):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
04-17 15:47:37.166: E/AndroidRuntime(555):  at java.lang.Thread.run(Thread.java:856)
04-17 15:47:37.166: E/AndroidRuntime(555): Caused by: java.lang.NullPointerException
04-17 15:47:37.166: E/AndroidRuntime(555):  at com.example.independentretailers.retailersignup$CreateNewRetailer.doInBackground(retailersignup.java:97)
04-17 15:47:37.166: E/AndroidRuntime(555):  at com.example.independentretailers.retailersignup$CreateNewRetailer.doInBackground(retailersignup.java:1)
04-17 15:47:37.166: E/AndroidRuntime(555):  at android.os.AsyncTask$2.call(AsyncTask.java:264)
04-17 15:47:37.166: E/AndroidRuntime(555):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
04-17 15:47:37.166: E/AndroidRuntime(555):  ... 5 more
04-17 15:47:40.524: I/dalvikvm(579): threadid=3: reacting to signal 3
04-17 15:47:40.582: I/dalvikvm(579): Wrote stack traces to '/data/anr/traces.txt'
04-17 15:47:40.753: D/gralloc_goldfish(579): Emulator without GPU emulation detected.

【问题讨论】：

标签： php android json

【解决方案1】：

解析您的 JSON 时出错。我建议记录您的 JSON 响应，可能是这样：

// try parse the string to a JSON object
try {
    Log.d("My JSON", json);
    jObj = new JSONObject(json);
} catch (JSONException e) {
    Log.e("JSON Parser", "Error parsing data " + e.toString());
}

从那里您可以查看问题是在您的 PHP 中还是在您的应用程序中。

【讨论】：

我知道，这不是解决方案。但是你应该再次运行并检查你的日志，看看你的 JSON 响应是什么。如果可能，请在此处发布。
我认为它根本没有命中 JSON，因为它无法访问 try catch 并且我的日志消息从第一次开始没有改变？
您的异常是“解析数据错误”而不是“转换结果错误”，这意味着它得到了响应，但在解析数据时抛出了异常。同样，我的回答不是解决您的问题，而是要知道您收到了什么以了解出了什么问题。
好的，我明白了.. 这可能看起来很傻，但是我在哪里可以找到我的日志？我似乎找不到它只有 logcat
在您的 logcat 中，您可以看到您的日志。查找您刚刚添加的那个，或使用 Ctrl + F 并查找“我的 JSON”。