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Can't get the value from doInBackGround() process at onPostExecute()

I'm using AsyncTask to insert, update and delete data from database. I used this code to insert, update, delete and it works fine. But when I want to use select, and show the data at EditText, I can't get the value from doInBackground() to the onPostExecute() and it shows nothing.
Here's my code :
MenuUtama.java
public class MenuUtama extends Activity {
/** Called when the activity is first created. */
private TextView nama_user;
private String nm_user = "";
private EditText kode, nama, harga, deskripsi;
private Button insert, update, delete, cek;
private String kode1, nama1, harga1, deskripsi1;
JSONArray data = null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
kode = (EditText) findViewById(R.id.editKode);
nama = (EditText) findViewById(R.id.editNama);
harga = (EditText) findViewById(R.id.editHarga);
deskripsi = (EditText) findViewById(R.id.editDes);
cek = (Button) findViewById(R.id.btnCek);
insert = (Button) findViewById(R.id.buttonInsert);
update = (Button) findViewById(R.id.buttonUpdate);
delete = (Button) findViewById(R.id.buttonDelete);
nama_user = (TextView) findViewById(R.id.textView3);
Intent i = getIntent();
nm_user = i.getStringExtra("nama_user");
nama_user.setText(nm_user);
insert.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
String url = "";
url = "http://192.168.1.10/crudsederhana/aksi.php";
try {
String ko = URLEncoder.encode(kode.getText().toString(),"utf-8");
String n = URLEncoder.encode(nama.getText().toString(),"utf-8");
String hr = URLEncoder.encode(harga.getText().toString(),"utf-8");
String d = URLEncoder.encode(deskripsi.getText().toString(), "utf-8");
url += "?a=insert&kd=" + ko + "&nm=" + n + "&hrg=" + hr + "&deskripsi=" + d;
new CRUD().execute(url);
}
catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
});
update.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
String url = "";
url = "http://192.168.1.10/crudsederhana/aksi.php";
try {
String ko = URLEncoder.encode(kode.getText().toString(),"utf-8");
String n = URLEncoder.encode(nama.getText().toString(),"utf-8");
String hr = URLEncoder.encode(harga.getText().toString(),"utf-8");
String d = URLEncoder.encode(deskripsi.getText().toString(), "utf-8");
url += "?a=update&kd=" + ko + "&nm=" + n + "&hrg=" +hr+ "&des=" + d;
new CRUD().execute(url);
}
catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
});
delete.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
String url = "";
kode1 = kode.getText().toString();
url = "http://192.168.1.10/crudsederhana/aksi.php?a=delete&kd=" + kode1;
new CRUD().execute(url);
}
});
cek.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
String url = "";
kode1 = kode.getText().toString();
url = "http://192.168.1.10/crudsederhana/aksi.php?a=read&kd="+kode1;
new CRUD().execute(url);
}
});
}
public class CRUD extends AsyncTask<String, String, String> {
String success;
String kode_d, nama_d, harga_d, des_d;
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected String doInBackground(String... params) {
JSONParser jParser = new JSONParser();
JSONObject json = jParser.getJSONFromUrl(params[0]);
try {
success = json.getString("success");
Log.e("error", "nilai sukses=" + success);
JSONArray hasil = json.getJSONArray("login");
if (success.equals("1")) {
for (int i = 0; i < hasil.length(); i++) {
JSONObject c = hasil.getJSONObject(i);
kode_d = c.getString("kd");
nama_d = c.getString("nm");
harga_d = c.getString("hrg");
des_d = c.getString("deskripsi");
}
}
else {
Log.e("erro", "tidak bisa ambil data 0");
}
}
catch (Exception e) {
// TODO: handle exception
Log.e("erro", "tidak bisa ambil data 1");
}
return kode_d;
}
protected void onPostExecute(String result) {
super.onPostExecute(result);
kode.setText(kode_d);
nama.setText(nama_d);
harga.setText(harga_d);
deskripsi.setText(des_d);
}
}
}
JSONParser.java
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;
}
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;
}
}

It is because you don't return any value from the doInBackground() (always return null) and you are not using the 'string' in the onPostExecute(String result) formal parameter. Garbage-In-Garbage-Out

your doInBackground() returns just a string return kode_d; and then in your onPostExecute(String result) (which expects a String) you use the kode_d which is null.
If you want all of those values to be returned create an ArrayList(), return it at the end doInBackground() and get it in onPostExecute(ArrayList result) with an iteration and pass it to you textviews.
Even better create an object and add the values to each field. Your fields are the kode_d, nama_d, harga_d, des_d
this is what the onPostExecute does
/**
* <p>Runs on the UI thread after {#link #doInBackground}. The
* specified result is the value returned by {#link #doInBackground}.
* To better support testing frameworks, it is recommended that this be
* written to tolerate direct execution as part of the execute() call.
* The default version does nothing.</p>
*
* <p>This method won't be invoked if the task was cancelled.</p>
*
* #param result The result of the operation computed by {#link #doInBackground}.
*
* #see #onPreExecute
* #see #doInBackground
* #see #onCancelled(Object)
*/

Displaying database records in android using JAVA RESTful webservice

I am trying to display database record using java restful web service. I have able to create a login form using it but I cannot display the records on the database. I tried this code but its not working at all. When button is pressed nothing happens. Heres my code.
DriverDetails.java
class Details extends Activity {
TextView name1;
TextView plate1;
Button Btngetdata;
//URL to get JSON Array
private static String url = "http://192.168.254.108:8080/taxisafe/display/taxidetails";
//JSON Node Names
private static final String TAG_USER = "taxi";
private static final String TAG_NAME = "taxi_name";
private static final String TAG_EMAIL = "taxi_plate_no";
JSONArray user = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Btngetdata = (Button)findViewById(R.id.getdata);
Btngetdata.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
new JSONParse().execute();
}
});
}
private class JSONParse extends AsyncTask<String, String, JSONObject> {
#Override
protected void onPreExecute() {
super.onPreExecute();
name1 = (TextView)findViewById(R.id.name);
plate1 = (TextView)findViewById(R.id.plate);
}
#Override
protected JSONObject doInBackground(String... args) {
HttpConnection jParser = new HttpConnection();
// Getting JSON from URL
JSONObject json = jParser.getJSONFromUrl(url);
return json;
}
#Override
protected void onPostExecute(JSONObject json) {
try {
// Getting JSON Array
user = json.getJSONArray(TAG_USER);
JSONObject c = user.getJSONObject(0);
// Storing JSON item in a Variable
String name = c.getString(TAG_NAME);
String email = c.getString(TAG_EMAIL);
//Set JSON Data in TextView
name1.setText(name);
plate1.setText(email);
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
HttpConnection.java
public class HttpConnection {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public HttpConnection() {
}
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;
}
}

I suggest adding Volley to your project
https://developer.android.com/training/volley/index.html
and following the example here https://developer.android.com/training/volley/request.html#request-json
You will not need to create your own HTTP request. Let Volley handle the network request using JSONObjectRequest

Attempt to invoke virtual method 'int org.json.JSONObject.getInt(java.lang.String)' on a null object reference

I'm trying to check the username/psw on my phpmyadmin database
but I can't figure out the problem.
The logcat gives me this error:
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int org.json.JSONObject.getInt(java.lang.String)' on a null object reference
Java code:
public class MainActivity extends ActionBarActivity {
// Progress Dialog
private ProgressDialog pDialog;
private String password="";
private String userName="";
JSONParser jsonParser = new JSONParser();
// url to create new product
private static String url_login = "http://localhost/android_connect/get_login.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
Button btnSignIn;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnSignIn=(Button)findViewById(R.id.buttonSignIN);
}
public void signIn(View V)
{
final Dialog dialog = new Dialog(MainActivity.this);
dialog.setContentView(R.layout.login);
dialog.setTitle("Login");
// get the Refferences of views
final EditText editTextUserName=(EditText)dialog.findViewById(R.id.editTextUserNameToLogin);
final EditText editTextPassword=(EditText)dialog.findViewById(R.id.editTextPasswordToLogin);
Button btnSignIn=(Button)dialog.findViewById(R.id.buttonSignIn);
// Set On ClickListener
btnSignIn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// get The User name and Password
userName=editTextUserName.getText().toString();
password=editTextPassword.getText().toString();
new LoginUser().execute();
}
});
dialog.show();
}
class LoginUser extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Verificoo NomeUtente & Password ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Checking login
* */
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("use_username", userName));
params.add(new BasicNameValuePair("use_psw", password));
// getting JSON Object
// Note that create product url accepts POST method
JSONObject json = jsonParser.makeHttpRequest(url_login,
"POST", params);
// check for success tag
try {
int success = json.getInt(TAG_SUCCESS)
if (success == 1) {
//blablabla
} else {
Intent intent = getIntent();
finish();
Toast.makeText(MainActivity.this, "User Name or Password does not match", Toast.LENGTH_LONG).show();
startActivity(intent);
}
} 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();
}
}
}

#miselking
here the class JsonParser
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;
}
}

check json is not null
if(json!=null){do something}

Error at this line
httpPost.setEntity(new UrlEncodedFormEntity(params));
Use this line
if (params!=null)
httpPost.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
and also in GET method use HTTP.UTF_8 instead of "utf-8"

ERROR parsing data value of type org.json.JSONArray cannot be converted to JSONObject

While Running the code (given after the error msg) throws the error as
Coding follows:
public class Slide extends ActionBarActivity {
private ProgressDialog pDialog;
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>> detailsList; //Creating a Arraylist
private static String URL = "URL to my php page";
private static final String TAG_DETAILS = "details";
private static final String TAG_TITLE = "title";
JSONArray details = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_slide);
new onlineload().execute();
}
class onlineload extends AsyncTask<String, String, String>
{
#Override
protected void onPreExecute()
{
super.onPreExecute();
pDialog = new ProgressDialog(Slide.this);
pDialog.setMessage("Fetching Books...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
#Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
String title = "";
TextView tvTitle = (TextView)findViewById(R.id.Title);
List<NameValuePair> params = new ArrayList<NameValuePair>();
JSONObject json = jParser.makeHttpRequest(URL, "GET", params);
Log.d("All Products:",json.toString());
try {
details = json.getJSONArray(TAG_DETAILS);
for (int i = 0; i < details.length(); i++) {
JSONObject c = details.getJSONObject(i);
title = title + c.getString(TAG_TITLE)+"\n";
tvTitle.setText(title);
}
}
catch (JSONException e) {
e.printStackTrace();
}
return null;
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
Shown above is my java code..
Function of this code is to fetch Book title (more than 10 books title is available in database)from the online database and view it in an scroll view activity ..
my php code is working am getting the output only the problem is in displaying it in android activity !!
Looking for some help!!
JSON CODE:
public class JSONParser {
static InputStream is = null;
static JSONArray jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
// function get json from url
// by making HTTP POST or GET method
public JSONArray 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
Log.d("Entered Get", "Get SUccess"+url+method);
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 JSONArray(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}

Agree with #ρяσѕρєя K
There was cast exception occurred that means you need to use JSON Array. Coz you are using JSON Object where actually JSON Array is required.
If you are confused within response which is receiving is JSONArray or JSONObject then you can go for get() method which return data in Object manner.
example : Object c = details.get(i);
So after that you can check for
If(c instanceOf JSONArray){
/// perform as array operation
}
If(c instanceOf JSONObject){
// perform json object retrieving operation
}

JSON: Value of type java.lang.String cannot be converted to JSONObject

I'm trying to program an app to send a String to a service. A friend of mine has a service to receive the data.
Logcat shows this error: "org.json.JSONException: Value FIRST of type java.lang.String cannot be converted to JSONObject"
Here is my code:
Main Activity
public class MainActivity extends Activity {
private String URL = "String with my friend's url";
private Button btnAddValue;
String num = "1";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RadioGroup answer = (RadioGroup) findViewById(R.id.answer);
answer.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
switch (checkedId) {
case R.id.answerA:
num = "1";
break;
case R.id.answerB:
num = "2";
break;
case R.id.answerC:
num = "3";
break;
}
}
});
btnAddValue = (Button) findViewById(R.id.submit);
btnAddValue.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
new AddNewValue().execute(num);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
private class AddNewValue extends AsyncTask<String, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected Void doInBackground(String... arg) {
// TODO Auto-generated method stub
String number = arg[0];
// Preparing post params
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("number", number));
ServiceHandler serviceClient = new ServiceHandler();
String json = serviceClient.makeServiceCall(URL,
ServiceHandler.POST, params);
Log.d("Create Request: ", "> " + json);
if (json != null) {
try {
JSONObject jsonObj = new JSONObject(json);
boolean error = jsonObj.getBoolean("error");
// checking for error node in json
if (!error) {
// new category created successfully
Log.e("Value added successfully ",
"> " + jsonObj.getString("message"));
} else {
Log.e("Add Error: ",
"> " + jsonObj.getString("message"));
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("JSON Data", "JSON data error!");
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
}
}
Service Handler
public class ServiceHandler {
static InputStream is = null;
static String response = null;
public final static int GET = 1;
public final static int POST = 2;
public ServiceHandler() {
}
public String makeServiceCall(String url, int method) {
return this.makeServiceCall(url, method, null);
}
public String makeServiceCall(String url, int method,
List<NameValuePair> params) {
try {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpEntity httpEntity = null;
HttpResponse httpResponse = null;
if (method == POST) {
HttpPost httpPost = new HttpPost(url);
if (params != null) {
httpPost.setEntity(new UrlEncodedFormEntity(params));
}
httpResponse = httpClient.execute(httpPost);
} else if (method == GET) {
if (params != null) {
String paramString = URLEncodedUtils
.format(params, "utf-8");
url += "?" + paramString;
}
HttpGet httpGet = new HttpGet(url);
httpResponse = httpClient.execute(httpGet);
}
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, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
response = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error: " + e.toString());
}
return response;
}
}
I read questions to other people with the same problem. The solution seemed to be to add a "{" at the beginning of the json String and a "}" at the end, but it didn't work to me. I tried changing this:
String json = serviceClient.makeServiceCall(URL_NEW_PREDICTION,
ServiceHandler.POST, params);
to this:
String json = "{" + serviceClient.makeServiceCall(URL_NEW_PREDICTION,
ServiceHandler.POST, params) + "}";
but the I got this error:
"org.json.JSONException: Expected ':' after FIRST at character 9 of {FIRST DATA New record created successfully}"

You're receiving back a string that is not able to be parsed to JSON. You can't just make something JSON by adding braces, it needs to adhere to proper JSON formatting. This site shows some good examples of what that means.
Specifically, the parser is telling you that having a space after FIRST isn't okay without having quotes around it...but just adding that won't fix the issue, the problem is more deep than that.