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Getting org.json.JSONException: End of input at character 0 errror in Android App

I have tried all answers given for "org.json.JSONException: End of input at character 0 " before my question ,
but not getting correct way for my app, please help me ,
Log
08-22 10:59:45.112: I/System.out(6677): .....reader.readLine().......... [{"m_id":1,"send_id":1,"user_name_from":"mahi ","user_imei_from":"356605052523574","message":"mahi","time_date":"2014-08-21 05:32:15 PM","item":null,"qty":null,"image":null,"user_name_to":"demo","user_imei_to":"000000000000000"}]
08-22 10:59:45.122: W/System.err(6677): org.json.JSONException: End of input at character 0 of
08-22 10:59:45.122: W/System.err(6677): at org.json.JSONTokener.syntaxError(JSONTokener.java:450)
08-22 10:59:45.132: W/System.err(6677): at org.json.JSONTokener.nextValue(JSONTokener.java:97)
08-22 10:59:45.132: W/System.err(6677): at org.json.JSONArray.<init>(JSONArray.java:87)
08-22 10:59:45.132: W/System.err(6677): at org.json.JSONArray.<init>(JSONArray.java:103)
08-22 10:59:45.132: W/System.err(6677): at com.pis.pisservices.AllMessageService$sync.doInBackground(AllMessageService.java:167)
08-22 10:59:45.152: W/System.err(6677): at com.pis.pisservices.AllMessageService$sync.doInBackground(AllMessageService.java:1)
08-22 10:59:45.152: W/System.err(6677): at android.os.AsyncTask$2.call(AsyncTask.java:264)
08-22 10:59:45.152: W/System.err(6677): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
08-22 10:59:45.152: W/System.err(6677): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
08-22 10:59:45.152: W/System.err(6677): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
08-22 10:59:45.162: W/System.err(6677): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
08-22 10:59:45.162: W/System.err(6677): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
08-22 10:59:45.162: W/System.err(6677): at java.lang.Thread.run(Thread.java:856)
In Activity
protected Void doInBackground(Void... params)
{
HttpClient client= new DefaultHttpClient();
HttpGet getrequest= new HttpGet(SERVICE_URL);
try
{
System.out.println("..........sync...All msg..Service...In try........");
HttpResponse response=client.execute(getrequest);
System.out.println("....jsdata.response..."+response);
InputStream jsdata= response.getEntity().getContent();
System.out.println("....jsdata.InputStream..."+jsdata);
BufferedReader reader= new BufferedReader(new InputStreamReader(jsdata));
StringBuilder builder = new StringBuilder();
String line;
System.out.println(".....reader.readLine().........."+reader.readLine());
while((line=reader.readLine())!=null)
{
builder.append(line);
System.out.println("....builder.append(line);..."+builder.append(line));
}
String Jsondata=builder.toString();
JSONArray item=new JSONArray(Jsondata);
// System.out.println(".....JSONArray..item...."+item);
int temp=item.length();
System.out.println("...All msg.temp...."+temp);
if(item != null)
{
Cursor cur = dbh.getblankIdCUR();
System.out.println("...dbh.getblankIdCUR()....."+dbh.getblankIdCUR());
for(int i = 0; i < item.length(); i++){
if(i<temp)
{
JSONObject c = item.getJSONObject(i);
String m_id =c.getString(TAGm_id);
String send_id =c.getString(TAG_send_id);
String from_name =c.getString(TAGfrom_name);
String from_imei = c.getString(TAGfrom_imei);
String msg = c.getString(TAGMessage);
String msg_img = c.getString(TAGmsg_image);
String m_item=c.getString(TAGitem);
String Qty = c.getString(TAGQty);
String time_date = c.getString(TAGtime_date);
String to_imei = c.getString(TAGto_imei);
String to_name = c.getString(TAGto_name);
String Unique_id = from_imei + time_date;
System.out.println("......All msg..Service....sdds...........");
System.out.println("...msg..cur.getCount() ..........."+cur.getCount() );
// update the sent message
if(cur.getCount() != 0)
{ System.out.println("........Service...ssssssssssss............");
cur.moveToFirst();
do {
int snd=cur.getInt(1);
String s= Integer.toString(snd);
System.out.println("........send_id.equalsIgnoreCase(s)...fdf........"+send_id.equalsIgnoreCase(s));
if(send_id.equalsIgnoreCase(s))
{
System.out.println("........send_id.equalsIgnoreCase(s)..........."+send_id.equalsIgnoreCase(s));
dbh.updatemessage(from_imei,send_id,m_id,time_date);
break;
}
} while (cur.moveToNext());
}
// get messages which has been send by other
else if((send_id.equalsIgnoreCase("0")) && ((!from_imei.equalsIgnoreCase(Imei_no)) || (from_imei.equalsIgnoreCase(Imei_no))))
{
dbh.Insert_msgdata(m_id,send_id, from_name, from_imei, msg, msg_img, m_item, Qty, time_date, to_imei, to_name);
showNotification(from_name);
}
// get all messages which after data clear
else
{
dbh.Insert_msgdata(m_id,send_id, from_name, from_imei, msg, msg_img, m_item, Qty, time_date, to_imei, to_name);
}
}
}
}
}
catch (JSONException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
Jason String
[{"m_id":1,"send_id":1,"user_name_from":"mahi ","user_imei_from":"356605052523574","message":"mahi","time_date":"2014-08-21 05:32:15 PM","item":null,"qty":null,"image":null,"user_name_to":"demo","user_imei_to":"000000000000000"}]
My jason is not getting null , means it has some values.
I have tried this on Locally But not done.
I have used Get Method.
So , Please Help Me to solve this.
Thanks.

change
String line;
System.out.println(".....reader.readLine().........."+reader.readLine());
while((line=reader.readLine())!=null)
{
builder.append(line);
System.out.println("....builder.append(line);..."+builder.append(line));
}
to
while((line=reader.readLine())!=null)
{
System.out.println(".....reader.readLine().........."+ line);
builder.append(line);
System.out.println("....builder.append(line);..."+builder.append(line));
}
otherwise you are reading the line, printing it and throwing it away, and will not be added to the jsonData variable

Android Application Force closing (retrieving data)

I am new to Android application development and Java programming, currently, I'm working on a project to retrieve from my database the status of a service. However, the application will stop working whenever I tried to submit my tracking ID.
MainActivity.java
package com.example.trackstatus;
import com.example.testapp.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends Activity {
Button btnViewStatus;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Buttons
btnViewStatus = (Button) findViewById(R.id.btnViewStatus);
// view products click event
btnViewStatus.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// Launching View status activity
Intent i = new Intent(getApplicationContext(), ViewTrackingStatusActivity.class);
startActivity(i);
}
});
}}
TrackStatus Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package = "com.example.trackstatus"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="20" />
<!-- Internet Permissions -->
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<!-- View Tracking Status Activity -->
<activity
android:name=".ViewTrackingStatusActivity"
android:label="View Tracking Status" >
</activity>
</application>
</manifest>
ViewTrackingStatusActivity.java
package com.example.trackstatus;
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 com.example.testapp.R;
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.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class ViewTrackingStatusActivity extends Activity{
TextView textView1;
EditText trackingNumberText;
Button btnViewStatus;
String tid;
String tracking;
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
// url to get service status
private static String url = "http://10.0.2.2/1201716f/android%20connect/get_svc.php?tid=0";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_TRACKING = "tracking";
private static final String TAG_TID = "tid";
public String trackingno;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView1 = (TextView) findViewById(R.id.textView1);
trackingNumberText = (EditText) findViewById(R.id.trackingNumberText);
trackingno = trackingNumberText.getText().toString();
btnViewStatus = (Button) findViewById(R.id.btnViewStatus);
Intent intent = getIntent();
tid = intent.getStringExtra(TAG_TID);
// Getting tracking status details in background thread
new GetStatusDetails().execute();
//Toast.makeText(getApplicationContext(),"Hello",
// Toast.LENGTH_LONG).show();
}
class GetStatusDetails extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(ViewTrackingStatusActivity.this);
pDialog.setMessage("Loading details");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
protected String doInBackground(String... params) {
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
// Check for success tag
int success;
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("tid", trackingno));
// getting product details by making HTTP request
// Note that product details url will use GET request
JSONObject json = jsonParser.makeHttpRequest(url, "GET", params);
// check your log for json response
Log.d("Tracking Status Details", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully received product details
JSONArray trackingObj = json.getJSONArray(TAG_TRACKING); // JSON Array
// get first product object from JSON Array
JSONObject tracking = trackingObj.getJSONObject(0);
// display tracking status in ToastBox
Toast.makeText(ViewTrackingStatusActivity.this,json.getString(TAG_TRACKING),Toast.LENGTH_LONG).show();
}
else
{
//service with tid not found
Toast.makeText(getApplicationContext(),"Service not found!",Toast.LENGTH_LONG).show();
}
}
catch (JSONException e)
{
e.printStackTrace();
}
}
});
return null;
}
}
}
JSONParser.java
package com.example.trackstatus;
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;
}
}
Logcat
08-19 23:52:46.644: D/AndroidRuntime(3809): Shutting down VM
08-19 23:52:46.644: W/dalvikvm(3809): threadid=1: thread exiting with uncaught exception (group=0x41b37700)
08-19 23:52:46.654: E/AndroidRuntime(3809): FATAL EXCEPTION: main
08-19 23:52:46.654: E/AndroidRuntime(3809): android.os.NetworkOnMainThreadException
08-19 23:52:46.654: E/AndroidRuntime(3809): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1133)
08-19 23:52:46.654: E/AndroidRuntime(3809): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
08-19 23:52:46.654: E/AndroidRuntime(3809): at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
08-19 23:52:46.654: E/AndroidRuntime(3809): at libcore.io.IoBridge.connect(IoBridge.java:112)
08-19 23:52:46.654: E/AndroidRuntime(3809): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
08-19 23:52:46.654: E/AndroidRuntime(3809): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
08-19 23:52:46.654: E/AndroidRuntime(3809): at java.net.Socket.connect(Socket.java:842)
08-19 23:52:46.654: E/AndroidRuntime(3809): at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
08-19 23:52:46.654: E/AndroidRuntime(3809): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
08-19 23:52:46.654: E/AndroidRuntime(3809): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
08-19 23:52:46.654: E/AndroidRuntime(3809): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
08-19 23:52:46.654: E/AndroidRuntime(3809): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
08-19 23:52:46.654: E/AndroidRuntime(3809): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
08-19 23:52:46.654: E/AndroidRuntime(3809): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
08-19 23:52:46.654: E/AndroidRuntime(3809): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
08-19 23:52:46.654: E/AndroidRuntime(3809): at com.example.trackstatus.JSONParser.makeHttpRequest(JSONParser.java:63)
08-19 23:52:46.654: E/AndroidRuntime(3809): at com.example.trackstatus.ViewTrackingStatusActivity$GetStatusDetails$1.run(ViewTrackingStatusActivity.java:92)
08-19 23:52:46.654: E/AndroidRuntime(3809): at android.os.Handler.handleCallback(Handler.java:730)
08-19 23:52:46.654: E/AndroidRuntime(3809): at android.os.Handler.dispatchMessage(Handler.java:92)
08-19 23:52:46.654: E/AndroidRuntime(3809): at android.os.Looper.loop(Looper.java:137)
08-19 23:52:46.654: E/AndroidRuntime(3809): at android.app.ActivityThread.main(ActivityThread.java:5293)
08-19 23:52:46.654: E/AndroidRuntime(3809): at java.lang.reflect.Method.invokeNative(Native Method)
08-19 23:52:46.654: E/AndroidRuntime(3809): at java.lang.reflect.Method.invoke(Method.java:525)
08-19 23:52:46.654: E/AndroidRuntime(3809): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:738)
08-19 23:52:46.654: E/AndroidRuntime(3809): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554)
08-19 23:52:46.654: E/AndroidRuntime(3809): at dalvik.system.NativeStart.main(Native Method)
08-19 23:52:49.086: I/Process(3809): Sending signal. PID: 3809 SIG: 9

According to your LogCat message:
Caused by: java.lang.NullPointerException at com.example.trackstatus.ViewTrackingStatusActivity.onCreate(ViewTrackingStatusActivity.java:55)
You are missing :
setContentView(R.layout.your_layout);
where your EditText trackingNumberText must be declared.
thats the reason for what trackingNumberText is null
trackingNumberText = (EditText) findViewById(R.id.trackingNumberText);
More info:
setContentView() method
Update:
Since you have this new exception: NetworkOnMainThreadException
android.os.NetworkOnMainThreadException at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1133)
you have to implement the use of AsyncTask
And hey! you don´t need to use runOnUiThread inside the doInBackground() method of the Asynctask :P:
protected String doInBackground(String... params) {
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
Move the lines that implies operations on UI thread like
Toast.makeText(getApplicationContext(),"Service not found!",Toast.LENGTH_LONG).show();
to the onPostExecute() method of the Asynctask

The error is in Line55
String trackingno = trackingNumberText.getText().toString();
trackingNumberText is NULL
instead try to do NULL check
String trackingno = "";
if(trackingNumberText.getText().length() > 0)
{
trackingno = trackingNumberText.getText().toString();
} else {
Toast.makeText(getApplicationContext(), "Enter values", Toast.LENGTH_LONG).show();
return;
}
EDIT:
You have to send all requests to server in Background Thread, use AsyncTask
Here is the detailed example for performing Network Operation.

what the error in this code to get json data? [duplicate]

This question already has answers here:
How can I fix 'android.os.NetworkOnMainThreadException'?
(66 answers)
android.os.NetworkOnMainThreadException . Need to use async task?
(2 answers)
Closed 9 years ago.
What is the error in this code?
I would like to add a facebook page name and get its json data, but there is something error I cannot discover. These are all files I use and added logcat messages:
PagesActivity.java
package com.engahmedphp.facebookcollector;
import org.json.JSONException;
import org.json.JSONObject;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class PagesActivity extends Activity {
DatabaseHandler db = new DatabaseHandler(this);
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pages);
final Button button = (Button) findViewById(R.id.addPage);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
AlertDialog.Builder alert = new AlertDialog.Builder(
PagesActivity.this);
alert.setTitle("Add New Page");
alert.setMessage("Enter Page Name OR Valid Facebook Link");
// Set an EditText view to get user input
final EditText input = new EditText(PagesActivity.this);
alert.setView(input);
alert.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
String value = input.getText().toString();
// Do something with value!
String url = "http://graph.facebook.com/"
+ value + "/?fields=picture,name";
// Creating JSON Parser instance
JSONParser jParser = new JSONParser();
// getting JSON string from URL
JSONObject json = jParser.getJSONFromUrl(url);
try {
// Storing each json item in variable
String name = json.getString("name");
String fid = json.getString("id");
String picture = json
.getJSONObject("picture")
.getJSONObject("data")
.getString("url");
db.addPage(name, fid, picture);
} catch (JSONException e) {
e.printStackTrace();
}
// addPageData(value);
}
});
alert.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
// Canceled.
}
});
alert.show();
}
});
}
void addPageData(String pageName) {
String url = "http://graph.facebook.com/" + pageName
+ "/?fields=picture,name";
// Creating JSON Parser instance
JSONParser jParser = new JSONParser();
// getting JSON string from URL
JSONObject json = jParser.getJSONFromUrl(url);
try {
// Storing each json item in variable
String name = json.getString("name");
String fid = json.getString("id");
String picture = json.getJSONObject("picture")
.getJSONObject("data").getString("url");
db.addPage(name, fid, picture);
} catch (JSONException e) {
e.printStackTrace();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.splash, menu);
return true;
}
}
JSONParser.java
package com.engahmedphp.facebookcollector;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
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() {
}
public JSONObject getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
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;
}
}
LogCat
08-31 03:35:23.031: D/dalvikvm(15972): GC_FOR_ALLOC freed 39K, 6% free 2633K/2792K, paused 65ms, total 68ms
08-31 03:35:23.041: I/dalvikvm-heap(15972): Grow heap (frag case) to 3.767MB for 1136500-byte allocation
08-31 03:35:23.163: D/dalvikvm(15972): GC_FOR_ALLOC freed 2K, 5% free 3740K/3904K, paused 116ms, total 116ms
08-31 03:35:23.511: D/gralloc_goldfish(15972): Emulator without GPU emulation detected.
08-31 03:35:26.611: I/Choreographer(15972): Skipped 30 frames! The application may be doing too much work on its main thread.
08-31 03:39:40.903: D/dalvikvm(15972): GC_FOR_ALLOC freed 47K, 4% free 4013K/4180K, paused 48ms, total 81ms
08-31 03:39:40.903: I/dalvikvm-heap(15972): Grow heap (frag case) to 4.638MB for 635812-byte allocation
08-31 03:39:41.023: D/dalvikvm(15972): GC_FOR_ALLOC freed 2K, 4% free 4631K/4804K, paused 111ms, total 111ms
08-31 03:39:41.483: I/Choreographer(15972): Skipped 83 frames! The application may be doing too much work on its main thread.
08-31 03:39:48.701: D/AndroidRuntime(15972): Shutting down VM
08-31 03:39:48.701: W/dalvikvm(15972): threadid=1: thread exiting with uncaught exception (group=0x414c4700)
08-31 03:39:48.741: E/AndroidRuntime(15972): FATAL EXCEPTION: main
08-31 03:39:48.741: E/AndroidRuntime(15972): android.os.NetworkOnMainThreadException
08-31 03:39:48.741: E/AndroidRuntime(15972): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1133)
08-31 03:39:48.741: E/AndroidRuntime(15972): at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
08-31 03:39:48.741: E/AndroidRuntime(15972): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
08-31 03:39:48.741: E/AndroidRuntime(15972): at java.net.InetAddress.getAllByName(InetAddress.java:214)
08-31 03:39:48.741: E/AndroidRuntime(15972): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
08-31 03:39:48.741: E/AndroidRuntime(15972): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
08-31 03:39:48.741: E/AndroidRuntime(15972): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
08-31 03:39:48.741: E/AndroidRuntime(15972): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
08-31 03:39:48.741: E/AndroidRuntime(15972): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
08-31 03:39:48.741: E/AndroidRuntime(15972): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
08-31 03:39:48.741: E/AndroidRuntime(15972): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
08-31 03:39:48.741: E/AndroidRuntime(15972): at com.engahmedphp.facebookcollector.JSONParser.getJSONFromUrl(JSONParser.java:38)
08-31 03:39:48.741: E/AndroidRuntime(15972): at com.engahmedphp.facebookcollector.PagesActivity$1$1.onClick(PagesActivity.java:49)
08-31 03:39:48.741: E/AndroidRuntime(15972): at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:166)
08-31 03:39:48.741: E/AndroidRuntime(15972): at android.os.Handler.dispatchMessage(Handler.java:99)
08-31 03:39:48.741: E/AndroidRuntime(15972): at android.os.Looper.loop(Looper.java:137)
08-31 03:39:48.741: E/AndroidRuntime(15972): at android.app.ActivityThread.main(ActivityThread.java:5103)
08-31 03:39:48.741: E/AndroidRuntime(15972): at java.lang.reflect.Method.invokeNative(Native Method)
08-31 03:39:48.741: E/AndroidRuntime(15972): at java.lang.reflect.Method.invoke(Method.java:525)
08-31 03:39:48.741: E/AndroidRuntime(15972): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
08-31 03:39:48.741: E/AndroidRuntime(15972): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
08-31 03:39:48.741: E/AndroidRuntime(15972): at dalvik.system.NativeStart.main(Native Method)

You are getting NetworkOnMainThreadException. See How to fix android.os.NetworkOnMainThreadException? . This exception is thrown when an application attempts to perform a networking operation on its main (UI) thread. Do the networking tasks using AsyncTask or inside a new thread. See the Android Documentation on NetworkOnMainThreadException for reasons of this Exception.
Here:
// getting JSON string from URL
JSONObject json = jParser.getJSONFromUrl(url);
you are doing network related stuff on main UI thread. Try to do this in a new thread.

The JSONParser make a HTTP connect in UI thread(The oneClick is invoked in UI thread)and it was fobidden now.
So you need move the network codes to other thread.

In case you have not noticed; StrictMode for network access results in a fatal error as for Android 3.0 (Honeycomb) or later, unless your app is targeting an API version before Honeycomb.
The right way of solving this is to use Android AsyncTask for network access.
The lazy way of handling this is to turn the check of:
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);

As others mentioned, you shouldn't be doing networking on UI thread to make your app UI responsive.
Try this
public class JsonParser extends AsyncTask<String, Void, JSONObject> {
InputStream is = null;
JSONObject jObj = null;
String json = "";
#Override
protected JSONObject doInBackground(String... params) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(params[0]);
HttpResponse httpResponse = httpClient.execute(httpPost);
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;
}
#Override
protected void onPostExecute(JSONObject json) {
try {
// Storing each json item in variable
String name = json.getString("name");
String fid = json.getString("id");
String picture = json
.getJSONObject("picture")
.getJSONObject("data")
.getString("url");
db.addPage(name, fid, picture);
} catch (JSONException e) {
e.printStackTrace();
}
}
}
Put the above class in your activity class, then use new JsonParser().execute(url); to fetch data and update the database.

Getting an error when connecting from android to PHP server

I have an android application project that connect to PHP server that I write it in codeigniter.
My JSONparser is:
package com.example.com.tourism;
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 method
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;
}
}
and my activity java code that connect to the server is
package com.example.com.tourism;
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;
public class SignUp extends Activity {
EditText first,last,birth ,pass;
private ProgressDialog pDialog;
private static String url_create_user = "http://10.0.2.2/tourism/index.php/site/register";
JSONParser jsonParser = new JSONParser();
private static final String TAG_SUCCESS = "success";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sign_up);
Button signUp=(Button)findViewById(R.id.sign_up);
first =(EditText) findViewById(R.id.edfname);
last =(EditText) findViewById(R.id.edlname);
pass =(EditText) findViewById(R.id.edpass);
signUp.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
new Createnewuser().execute();
}
});
}
class Createnewuser extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(SignUp.this);
pDialog.setMessage("Creating User..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Creating product
* */
protected String doInBackground(String... args) {
String name = first.getText().toString();
String price = last.getText().toString();
String description = pass.getText().toString();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("first_name", name));
params.add(new BasicNameValuePair("last_name", price));
params.add(new BasicNameValuePair("password", description));
// getting JSON Object
// Note that create product url accepts POST method
JSONObject json = jsonParser.makeHttpRequest(url_create_user,
"POST", params);
// check log cat fro response
Log.d("Create Response", json.toString());
// check for success tag
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully created product
Intent i = new Intent(getApplicationContext(), MainActivity.class);
startActivity(i);
// closing this screen
finish();
} else {
// failed to create product
}
} 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 done
pDialog.dismiss();
}
}
and the error in log cat is
07-07 11:30:44.159: E/JSON Parser(20514): Error parsing data org.json.JSONException: Value <!DOCTYPE of type java.lang.String cannot be converted to JSONObject
07-07 11:30:44.189: W/dalvikvm(20514): threadid=11: thread exiting with uncaught exception (group=0x40a71930)
07-07 11:30:44.229: E/AndroidRuntime(20514): FATAL EXCEPTION: AsyncTask #1
07-07 11:30:44.229: E/AndroidRuntime(20514): java.lang.RuntimeException: An error occured while executing doInBackground()
07-07 11:30:44.229: E/AndroidRuntime(20514): at android.os.AsyncTask$3.done(AsyncTask.java:299)
07-07 11:30:44.229: E/AndroidRuntime(20514): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
07-07 11:30:44.229: E/AndroidRuntime(20514): at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
07-07 11:30:44.229: E/AndroidRuntime(20514): at java.util.concurrent.FutureTask.run(FutureTask.java:239)
07-07 11:30:44.229: E/AndroidRuntime(20514): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
07-07 11:30:44.229: E/AndroidRuntime(20514): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
07-07 11:30:44.229: E/AndroidRuntime(20514): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
07-07 11:30:44.229: E/AndroidRuntime(20514): at java.lang.Thread.run(Thread.java:856)
07-07 11:30:44.229: E/AndroidRuntime(20514): Caused by: java.lang.NullPointerException
07-07 11:30:44.229: E/AndroidRuntime(20514): at com.example.com.tourism.SignUp$Createnewuser.doInBackground(SignUp.java:98)
07-07 11:30:44.229: E/AndroidRuntime(20514): at com.example.com.tourism.SignUp$Createnewuser.doInBackground(SignUp.java:1)
07-07 11:30:44.229: E/AndroidRuntime(20514): at android.os.AsyncTask$2.call(AsyncTask.java:287)
07-07 11:30:44.229: E/AndroidRuntime(20514): at java.util.concurrent.FutureTask.run(FutureTask.java:234)
07-07 11:30:44.229: E/AndroidRuntime(20514): ... 4 more
07-07 11:30:44.429: I/Choreographer(20514): Skipped 49 frames! The application may be doing too much work on its main thread.
07-07 11:30:44.779: I/Choreographer(20514): Skipped 222 frames! The application may be doing too much work on its main thread.
07-07 11:30:45.069: I/Choreographer(20514): Skipped 149 frames! The application may be doing too much work on its main thread.
07-07 11:30:45.369: I/Choreographer(20514): Skipped 194 frames! The application may be doing too much work on its main thread.
07-07 11:30:45.459: I/Choreographer(20514): Skipped 50 frames! The application may be doing too much work on its main thread.
07-07 11:30:46.019: E/WindowManager(20514): Activity com.example.com.tourism.SignUp has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{40d743a8 V.E..... R.....ID 0,0-304,96} that was originally added here
07-07 11:30:46.019: E/WindowManager(20514): android.view.WindowLeaked: Activity com.example.com.tourism.SignUp has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{40d743a8 V.E..... R.....ID 0,0-304,96} that was originally added here
07-07 11:30:46.019: E/WindowManager(20514): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:354)
07-07 11:30:46.019: E/WindowManager(20514): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:216)
07-07 11:30:46.019: E/WindowManager(20514): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
07-07 11:30:46.019: E/WindowManager(20514): at android.app.Dialog.show(Dialog.java:281)
07-07 11:30:46.019: E/WindowManager(20514): at com.example.com.tourism.SignUp$Createnewuser.onPreExecute(SignUp.java:75)
07-07 11:30:46.019: E/WindowManager(20514): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586)
07-07 11:30:46.019: E/WindowManager(20514): at android.os.AsyncTask.execute(AsyncTask.java:534)
07-07 11:30:46.019: E/WindowManager(20514): at com.example.com.tourism.SignUp$1.onClick(SignUp.java:57)
07-07 11:30:46.019: E/WindowManager(20514): at android.view.View.performClick(View.java:4204)
07-07 11:30:46.019: E/WindowManager(20514): at android.view.View$PerformClick.run(View.java:17355)
07-07 11:30:46.019: E/WindowManager(20514): at android.os.Handler.handleCallback(Handler.java:725)
07-07 11:30:46.019: E/WindowManager(20514): at android.os.Handler.dispatchMessage(Handler.java:92)
07-07 11:30:46.019: E/WindowManager(20514): at android.os.Looper.loop(Looper.java:137)
07-07 11:30:46.019: E/WindowManager(20514): at android.app.ActivityThread.main(ActivityThread.java:5041)
07-07 11:30:46.019: E/WindowManager(20514): at java.lang.reflect.Method.invokeNative(Native Method)
07-07 11:30:46.019: E/WindowManager(20514): at java.lang.reflect.Method.invoke(Method.java:511)
07-07 11:30:46.019: E/WindowManager(20514): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
07-07 11:30:46.019: E/WindowManager(20514): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
07-07 11:30:46.019: E/WindowManager(20514): at dalvik.system.NativeStart.main(Native Method)
i don't know where the problem is, please help me
is my code incorrect ???
if any one have correct code please give it to me i am using codeigniter for php and this is the code that i call it above
function register_get()
{
$json = array('status' => false );
if($this->input->post()==null){
$this -> response($json, 200);
}
$firstname = $this->post("first_name");
$lastname = $this->post("last_name");
$password = $this->post("password");
if(!$firstname || !$lastname || !$password){
$json['status'] = "wrong insert";
$this -> response($json, 200);
}
$this->load->model('Data_model');
$result = $this->Data_model->search($firstname, $lastname);
if($result)
{
$this->Data_model->insert($firstname,$lastname,$password);
$json['status'] = true;
}
// here if false..
$this -> response($json, 200);
}

There are issues with your PHP. You are not passing back any JSON. You will need to change your script to encode your array into JSON.
$result = json_encode($json)
Returning the actual JSON will help. Make sure you are not returning any HTML either. Your Java is trying to parse a JSON response, but you are responding with <!DOCTYPE...

Force close using sockets and AsyncTask

Hello people of stack....
Please see my class code and my LogCat below...
I am getting a force close when trying to connect. If someone could help me to figure out why it would be much appreciated.
Basically what the code is doing is:
Taking an IP Address from an intent.
Connecting to the IP with port 32
Then send a command, wait for response and the send another command.
After the 2 commands our sent I should get a response of "SNX_COM>"
Once the connection is established, I want the connection to stay open to send specific commands on button click.
Please help :)
package com.smarte.smartipcontrol;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
public class IPControl extends Activity {
private Socket socket;
private String serverIpAddress = "com.smarte.smartipcontrol.ACTU_IP";
private static final int REDIRECTED_SERVERPORT = 32;
public PrintWriter out;
public BufferedReader in;
public String data;
public Object pd;
public void getModel(View view) {
try {
out.println("[m\r\n");
//System.out.print("root\r\n");
while(!in.ready());
String textStatus = readBuffer();
} catch(IOException e) {}
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.act_ipcontrol);
try{
this.pd = ProgressDialog.show(this, "Loading..", "Please Wait...", true, false);
new AsyncAction().execute();
}catch (Exception e) {
e.printStackTrace();
}
}
private class AsyncAction extends AsyncTask<String, Void, String> {
protected String doInBackground(String... args) {
try {
InetAddress serverAddr = InetAddress.getByName(serverIpAddress);
socket = new Socket(serverAddr, REDIRECTED_SERVERPORT);
} catch (UnknownHostException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
try {
out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())), true); in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
while (! in .ready());
readBuffer();
out.println("root\r\n");
//System.out.print("root\r\n");
while (! in .ready());
readBuffer();
out.println("root\r\n");
//System.out.print("root\r\n");
while (! in .ready());
String msg = "";
while ( in .ready()) {
msg = msg + (char) in .read();
}
} catch (IOException e) {}
return null;//returns what you want to pass to the onPostExecute()
}
protected void onPostExecute(String result) {
//resultis the data returned from doInbackground
IPControl.this.data = result;
if (IPControl.this.pd != null) {
((Dialog) IPControl.this.pd).dismiss();
}
}
}
private String readBuffer() throws IOException {
String msg = "";
while(in.ready()) {
msg = msg + (char)in.read();
}
//System.out.print(msg);
if(msg.indexOf("SNX_COM> ") != -1) return msg.substring(0, msg.indexOf("SNX_COM> "));
else return msg;
}
}
Logcat.......
12-03 15:39:56.346: E/AndroidRuntime(2697): FATAL EXCEPTION: AsyncTask #5
12-03 15:39:56.346: E/AndroidRuntime(2697): java.lang.RuntimeException: An error occured while executing doInBackground()
12-03 15:39:56.346: E/AndroidRuntime(2697): at android.os.AsyncTask$3.done(AsyncTask.java:299)
12-03 15:39:56.346: E/AndroidRuntime(2697): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
12-03 15:39:56.346: E/AndroidRuntime(2697): at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
12-03 15:39:56.346: E/AndroidRuntime(2697): at java.util.concurrent.FutureTask.run(FutureTask.java:239)
12-03 15:39:56.346: E/AndroidRuntime(2697): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
12-03 15:39:56.346: E/AndroidRuntime(2697): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
12-03 15:39:56.346: E/AndroidRuntime(2697): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
12-03 15:39:56.346: E/AndroidRuntime(2697): at java.lang.Thread.run(Thread.java:856)
12-03 15:39:56.346: E/AndroidRuntime(2697): Caused by: java.lang.NullPointerException
12-03 15:39:56.346: E/AndroidRuntime(2697): at com.smarte.smartipcontrol.IPControl$AsyncAction.doInBackground(IPControl.java:71)
12-03 15:39:56.346: E/AndroidRuntime(2697): at com.smarte.smartipcontrol.IPControl$AsyncAction.doInBackground(IPControl.java:1)
12-03 15:39:56.346: E/AndroidRuntime(2697): at android.os.AsyncTask$2.call(AsyncTask.java:287)
12-03 15:39:56.346: E/AndroidRuntime(2697): at java.util.concurrent.FutureTask.run(FutureTask.java:234)
12-03 15:39:56.346: E/AndroidRuntime(2697): ... 4 more

I think your problem is here:
InetAddress serverAddr = InetAddress.getByName(serverIpAddress);
socket = new Socket(serverAddr, REDIRECTED_SERVERPORT);
I can't find where your serverIpAddress is assigned, thus you get NullPointerException.