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Following 2 possible solutions will resolve this problem :  Solution1 : To fix the problem, it was required that I list the path to my corporate PAC file by using  Configure -> "Appearance and Behavior" -> System Settings -> HTTP Proxy . I selected "Automatic proxy configuration url:" Delete your  ~/.Android*  folders (losing all of your settings :/). Run Android Studio. It will show you a welcome wizard where it tries to download the SDK again (and fails due to my rubbish internet). Click the X on the wizard window. That will enable you to get to the normal welcome dialog. Go to Settings->Project Defaults->Project Structure and change the Android SDK location to the correct one. Solution 2 : To fix the problem, it was required that I list the path to my corporate PAC file by using  Configure -> "Appearance and Behavior" -> System Settings -> HTTP Proxy . I selected "Automatic proxy configuration url:&quo
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"unterminated entity ref" Exception while working with DomParser in Android

WebService Response Looks:
---------------------trimString--------------------------------
<restaurant>
<name>
<sid>1</sid>
<restcode>1</restcode>
<restname>Garden Restaurant</restname>
<status>1</status>
</name>

<name>
<sid>2</sid>
<restcode>2</restcode>
<restname>Bar & Restaurant</restname>
<status>1</status>
</name>
</restaurant>
---------------------------------------------------------------------------------------------------------------------
LogCat ErrorLog Data :::

05-11 11:22:07.783: E/Error:(1044): unterminated entity ref (position:ENTITY_REF @11:19 in java.io.StringReader@40d7e790) 
05-11 11:22:07.823: I/System.out(1044): -------doc-------null
05-11 11:22:07.823: W/dalvikvm(1044): threadid=11: thread exiting with uncaught exception (group=0x40a70930)
05-11 11:22:07.833: E/AndroidRuntime(1044): FATAL EXCEPTION: Thread-87
05-11 11:22:07.833: E/AndroidRuntime(1044): java.lang.NullPointerException
05-11 11:22:07.833: E/AndroidRuntime(1044): at org.maxima.kot.PLLoginScreen$1.run(PLLoginScreen.java:179)
05-11 11:22:07.833: E/AndroidRuntime(1044): at java.lang.Thread.run(Thread.java:856)
05-11 11:22:07.843: W/Trace(1044): Unexpected value from nativeGetEnabledTags: 0
05-11 11:22:07.863: W/Trace(1044): Unexpected value from nativeGetEnabledTags: 0
05-11 11:22:07.873: I/Choreographer(1044): Skipped 210 frames!  The application may be doing too much work on its main thread.
05-11 11:22:16.742: W/Trace(1044): Unexpected value from nativeGetEnabledTags: 0
05-11 11:22:16.742: W/Trace(1044): Unexpected value from nativeGetEnabledTags: 0
05-11 11:22:16.853: W/Trace(1044): Unexpected value from nativeGetEnabledTags: 0
05-11 11:22:16.853: W/Trace(1044): Unexpected value from nativeGetEnabledTags: 0
05-11 11:22:16.884: W/Trace(1044): Unexpected value from nativeGetEnabledTags: 0
05-11 11:22:16.904: W/Trace(1044): Unexpected value from nativeGetEnabledTags: 0
05-11 11:22:16.933: W/Trace(1044): Unexpected value from nativeGetEnabledTags: 0
05-11 11:22:17.383: E/WindowManager(1044): Activity org.maxima.kot.PLLoginScreen has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{40d53f30 V.E..... R.....ID 0,0-139,88} that was originally added here
05-11 11:22:17.383: E/WindowManager(1044): android.view.WindowLeaked: Activity org.maxima.kot.PLLoginScreen has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{40d53f30 V.E..... R.....ID 0,0-139,88} that was originally added here
05-11 11:22:17.383: E/WindowManager(1044): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:354)
05-11 11:22:17.383: E/WindowManager(1044): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:216)
05-11 11:22:17.383: E/WindowManager(1044): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
05-11 11:22:17.383: E/WindowManager(1044): at android.app.Dialog.show(Dialog.java:281)
05-11 11:22:17.383: E/WindowManager(1044): at android.app.ProgressDialog.show(ProgressDialog.java:116)
05-11 11:22:17.383: E/WindowManager(1044): at android.app.ProgressDialog.show(ProgressDialog.java:99)
05-11 11:22:17.383: E/WindowManager(1044): at org.maxima.kot.SharedVariables.showActivityIndicator(SharedVariables.java:42)
05-11 11:22:17.383: E/WindowManager(1044): at org.maxima.kot.PLLoginScreen.loginBtnonClick(PLLoginScreen.java:145)
05-11 11:22:17.383: E/WindowManager(1044): at java.lang.reflect.Method.invokeNative(Native Method)
05-11 11:22:17.383: E/WindowManager(1044): at java.lang.reflect.Method.invoke(Method.java:511)
05-11 11:22:17.383: E/WindowManager(1044): at android.view.View$1.onClick(View.java:3592)
05-11 11:22:17.383: E/WindowManager(1044): at android.view.View.performClick(View.java:4202)
05-11 11:22:17.383: E/WindowManager(1044): at android.view.View$PerformClick.run(View.java:17340)
05-11 11:22:17.383: E/WindowManager(1044): at android.os.Handler.handleCallback(Handler.java:725)
05-11 11:22:17.383: E/WindowManager(1044): at android.os.Handler.dispatchMessage(Handler.java:92)
05-11 11:22:17.383: E/WindowManager(1044): at android.os.Looper.loop(Looper.java:137)
05-11 11:22:17.383: E/WindowManager(1044): at android.app.ActivityThread.main(ActivityThread.java:5039)
05-11 11:22:17.383: E/WindowManager(1044): at java.lang.reflect.Method.invokeNative(Native Method)
05-11 11:22:17.383: E/WindowManager(1044): at java.lang.reflect.Method.invoke(Method.java:511)
05-11 11:22:17.383: E/WindowManager(1044): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
05-11 11:22:17.383: E/WindowManager(1044): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
05-11 11:22:17.383: E/WindowManager(1044): at dalvik.system.NativeStart.main(Native Method)
05-11 11:22:17.412: W/Trace(1044): Unexpected value from nativeGetEnabledTags: 0
05-11 11:22:17.603: I/Choreographer(1044): Skipped 228 frames!  The application may be doing too much work on its main thread.
05-11 11:27:08.485: W/IInputConnectionWrapper(1044): showStatusIcon on inactive InputConnection
05-11 11:27:08.485: I/Process(1044): Sending signal. PID: 1044 SIG: 9

 ---------------------------------------------------------------------------------------------------------------

 MyJavaCode:
//if internet is there...
if(SharedVariables.checkInternetConnection(this))
{
progressDialog =SharedVariables.showActivityIndicator("Logging In...", PLLoginScreen.this);//ProgressDialog.show(PLLoginScreen.this, "", "Logging In...");
Thread thread=new Thread(new Runnable() {
@Override
public void run() {

try {
  HttpClient httpclient = new DefaultHttpClient();
     HttpPost httppost = new HttpPost("http://hotelkaveri.net/getrestaurants.php");
  List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
      
      System.out.println("---------------------userName---------------------------------"+ userName);
      System.out.println("---------------------password---------------------------------"+ password);
     
      nameValuePairs.add(new BasicNameValuePair("UserName", userName));//listOfOrdersToSen.get(i).getTableNo().toString()));           
          nameValuePairs.add(new BasicNameValuePair("Password", password));  
          httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
   // httpclient.execute(httppost);
  HttpResponse response = httpclient.execute(httppost);
  //HttpEntity entity = response.getEntity();
  responsestr=EntityUtils.toString(response.getEntity()).trim();
  //System.out.println(EntityUtils.getContentMimeType(entity));
  System.out.println("------------------responsestr-------------"+responsestr);
} catch (Exception e) {         
    }
 
 

if(responsestr.contains("restname")){
  trimString=responsestr.substring(137, (responsestr.length()- 46)).trim();
  System.out.println("---------------------trimString--------------------------------"+ trimString);
  // XMLParser parser = new XMLParser();
  System.out.println("--------------");

 //Here in below "doc" object become Null,here iam getting the value in "trimString" but its unable to parse that string,because that string having '&',so i just replace it .then problem is over. 
In order to solve this problem i just used this line here -->
trimString=trimString.replaceAll("&", "&amp;");  then problem solved..

  Document doc = getDomElement(trimString); // getting DOM element
  System.out.println("-------doc-------"+doc);
  NodeList nl = doc.getElementsByTagName("name");
  SharedVariables.restaurantNameArray=new String[nl.getLength()];
  SharedVariables.restaurantCodeArray=new String[nl.getLength()];
  //preparedTime=new String[nl.getLength()];
  //itemCode=new String[nl.getLength()];
  // looping through all item nodes <item>
  for (int i = 0; i < nl.getLength(); i++) {
  Element e = (Element) nl.item(i);  
 
  SharedVariables.restaurantNameArray[i] = getValue(e, "restname"); // name child value
  System.out.println("-----------------------------------restname------------"+SharedVariables.restaurantNameArray[i]);
  SharedVariables.restaurantCodeArray[i]= getValue(e, "restcode"); // description child value
  System.out.println("-------------------------------------restCode-------"+SharedVariables.restaurantCodeArray[i]);
  //itemRate[i] = getValue(e, "it_rate"); // cost child value
  // System.out.println("-------------------------------------------cost------"+itemRate[i]);
  //preparedTime[i] = getValue(e, "pretime"); // description child value
  // System.out.println("-------------------------------------description-------"+preparedTime[i]);
    
  }
  }


activity.runOnUiThread(new Runnable() {
@Override
public void run() {
 
  /*if(progressDialog.isShowing())
progressDialog.dismiss();*/
SharedVariables.hideActivityIndicator(progressDialog);
loginEmailEdtr.setText("");
loginPasswordEdtr.setText("");

System.out.println("----------responsestr length-----------"+responsestr.trim().length());
System.out.println("----------responsestr length-----------"+trimString.trim().length());
if(trimString!=null)
if(trimString.contains("restname")){
//trimString="";

Intent i=new Intent(PLLoginScreen.this, RestarentSelectActivity.class);
//i.putExtra("restNameArray", restName);
//i.putExtra("restCodeArray", restCode);
//i.putExtra("itemRateArray", itemRate);
//i.putExtra("itemPreparedTime", preparedTime);
startActivity(i);
}else{
SharedVariables.showAlertMessage(" Enter valid Username and Pass", activity);
}
}
  });

//timeoutHandler.sendEmptyMessage(0);



/**/



}});thread.start();
}else
{
SharedVariables.showAlertMessage("No Internet Connection !!", this);
}





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