Приложение для Android неожиданно останавливается

Question

Logcat error 
    05-07 23:57:26.990: E/JSON Parser(1297): Error parsing data org.json.JSONException: Value ???<br of type java.lang.String cannot be converted to JSONObject 
05-07 23:57:27.000: E/AndroidRuntime(1297): FATAL EXCEPTION: AsyncTask #1 
05-07 23:57:27.000: E/AndroidRuntime(1297): java.lang.RuntimeException: An error occured while executing doInBackground() 
05-07 23:57:27.000: E/AndroidRuntime(1297):at android.os.AsyncTask$3.done(AsyncTask.java:200) 
05-07 23:57:27.000: E/AndroidRuntime(1297): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274) 

Я разрабатываю приложение для входа в систему Android. У меня возникла проблема, когда приложение неожиданно останавливается при нажатии кнопки входа либо на эмулятор, либо на устройство Android. Поскольку я использую правильный IP-адрес и подключаю правильно wampserver database..may, я знаю, что такое ошибка, даже я перезапускаю eclipse.

Здесь класс JSONParser.java

import android.util.Log; 
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; 


public class JSONParser { 

static InputStream is = null; 
static JSONObject jObj = null; 
static String json = ""; 

// constructor 
public JSONParser() { 

} 


public JSONObject getJSONFromUrl(final String url) { 

    // Making HTTP request 
    try { 
     // Construct the client and the HTTP request. 
     DefaultHttpClient httpClient = new DefaultHttpClient(); 
     HttpPost httpPost = new HttpPost(url); 

     // Execute the POST request and store the response locally. 
     HttpResponse httpResponse = httpClient.execute(httpPost); 
     // Extract data from the response. 
     HttpEntity httpEntity = httpResponse.getEntity(); 
     // Open an inputStream with the data content. 
     is = httpEntity.getContent(); 

    } catch (UnsupportedEncodingException e) { 
     e.printStackTrace(); 
    } catch (ClientProtocolException e) { 
     e.printStackTrace(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 

    try { 
     // Create a BufferedReader to parse through the inputStream. 
     BufferedReader reader = new BufferedReader(new InputStreamReader(
       is, "iso-8859-1"), 8); 
     // Declare a string builder to help with the parsing. 
     StringBuilder sb = new StringBuilder(); 
     // Declare a string to store the JSON object data in string form. 
     String line = null; 

     // Build the string until null. 
     while ((line = reader.readLine()) != null) { 
      sb.append(line + "\n"); 
     } 

     // Close the input stream. 
     is.close(); 
     // Convert the string builder data to an actual string. 
     json = sb.toString(); 
    } catch (Exception e) { 
     Log.e("Buffer Error", "Error converting result " + e.toString()); 
    } 

    // Try to 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 the JSON Object. 
    return jObj; 

} 


// 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; 

} 
} 

Здесь login.java кодирование

package com.example.testpsm1; 

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 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.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.Toast; 

public class Login extends Activity implements OnClickListener{ 

private EditText user, pass; 
private Button mSubmit; 

// Progress Dialog 
private ProgressDialog pDialog; 

// JSON parser class 
JSONParser jsonParser = new JSONParser(); 

//php login script location: 

//localhost : 
//testing on your device 
//put your local ip instead, on windows, run CMD > ipconfig 
//or in mac's terminal type ifconfig and look for the ip under en0 or en1 

//testing on Emulator: 
private static final String LOGIN_URL = "http://192.168.1.9/webservice/login.php"; 



//JSON element ids from repsonse of php script: 
private static final String TAG_SUCCESS = "success"; 
private static final String TAG_MESSAGE = "message"; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_login); 

    //setup input fields 
    user = (EditText)findViewById(R.id.email); 
    pass = (EditText)findViewById(R.id.password); 

    //setup buttons 
    mSubmit = (Button)findViewById(R.id.login); 


    //register listeners 
    mSubmit.setOnClickListener(this); 


} 

@Override 
public void onClick(View v) { 
    // TODO Auto-generated method stub 

      new AttemptLogin().execute(); 

} 

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

    /** 
    * Before starting background thread Show Progress Dialog 
    * */ 
    boolean failure = false; 

    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     pDialog = new ProgressDialog(Login.this); 
     pDialog.setMessage("Attempting login..."); 
     pDialog.setIndeterminate(false); 
     pDialog.setCancelable(true); 
     pDialog.show(); 
    } 

    @Override 
    protected String doInBackground(String... args) { 
     // TODO Auto-generated method stub 
     // Check for success tag 
     int success; 
     String username = user.getText().toString(); 
     String password = pass.getText().toString(); 
     try { 
      // Building Parameters 
      List<NameValuePair> params = new ArrayList<NameValuePair>(); 
      params.add(new BasicNameValuePair("username", username)); 
      params.add(new BasicNameValuePair("password", password)); 

      Log.d("request!", "starting"); 
      // getting product details by making HTTP request 
      JSONObject json = jsonParser.makeHttpRequest(
        LOGIN_URL, "POST", params); 

      // check your log for json response 
      Log.d("Login attempt", json.toString()); 

      // json success tag 
      success = json.getInt(TAG_SUCCESS); 
      if (success == 1) { 
       Log.d("Login Successful!", json.toString()); 
       Intent i = new Intent(Login.this, ReadComments.class); 
       finish(); 
       startActivity(i); 
       return json.getString(TAG_MESSAGE); 
      }else{ 
       Log.d("Login Failure!", json.getString(TAG_MESSAGE)); 
       return json.getString(TAG_MESSAGE); 

      } 
     } 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 product deleted 
     pDialog.dismiss(); 
     if (file_url != null){ 
      Toast.makeText(Login.this, file_url, Toast.LENGTH_LONG).show(); 
     } 

    } 

} 


} 

Вот login.java кодирования

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 

xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
> 


<TextView 
android:id="@+id/textView2" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_alignParentTop="true" 
android:layout_centerHorizontal="true" 
android:layout_marginTop="17dp" 
android:gravity="center" 
android:text="Mobile Attendance System" 
android:textAppearance="?android:attr/textAppearanceLarge" 
android:textStyle="bold" /> 

<EditText 
android:id="@+id/email" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_alignBaseline="@+id/textView1" 
android:layout_alignBottom="@+id/textView1" 
android:layout_alignParentRight="true" 
    android:layout_marginTop="70dp" 
android:ems="10" /> 

<EditText 
    android:id="@+id/password" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_alignBottom="@+id/TextView01" 
android:layout_alignLeft="@+id/login" 
android:layout_alignTop="@+id/TextView01" 
android:ems="10" 
android:inputType="textPassword" > 

<requestFocus /> 
</EditText> 

<Button 
android:id="@+id/login" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_centerVertical="true" 
android:layout_toRightOf="@+id/textView1" 
android:text="Login" /> 

<TextView 
android:id="@+id/TextView01" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_below="@+id/textView1" 
android:layout_marginTop="20dp" 
android:layout_toLeftOf="@+id/editText1" 
android:text="Password" 
android:textSize="20dp" /> 

<TextView 
android:id="@+id/textView1" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:layout_alignParentLeft="true" 
android:layout_below="@+id/textView2" 
android:layout_marginTop="34dp" 
android:text="Username" 
android:textSize="20dp" /> 

</RelativeLayout> 

Answer 1

Возвращаемые данные не содержат действительный Объект JSON. Угадываясь из выдержки, они также не соответствуют ISO 8859-1.

Answer 2

Посмотрев на трассировку стека, я обнаружил, что ваш ответ Api в сети возвращает
тег, который нельзя разобрать на объекты Jason. Ответ, возвращенный с сервера, ошибочно проверяет это.