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Android JSON Data Posting results in IO Exception Always

I have a server and I use following Link to post data in my DB
http://URL.php?action=insert&vhc=vehiclenumber&mobile=mobilenumberoftheperson&time=currenttime
To keep record of vehicle entering time, Now I want to post same Data from Android for which I am using Following Code:
Inside Button Goes this:
button.setOnClickListener(new View.OnClickListener() {
//Toast.makeText(getApplicationContext(),"Data is tried!", Toast.LENGTH_LONG).show();
public void onClick(View v)
{
new Thread(new Runnable() {
public void run() {
postData();
}
}).start();
}
});
And my PostData Function is defined below:
public void postData() {
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("url.php");
try {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("vhc", "ABC124"));
nameValuePairs.add(new BasicNameValuePair("mobile", "089944440000"));
nameValuePairs.add(new BasicNameValuePair("time", "2014-12-28 22:22:52"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
message = e.getMessage();
// TODO Auto-generated catch block
} catch (IOException e) {
message= e.getMessage();
// TODO Auto-generated catch block
}
}
Now I tried to debug and found it failing at HttpResponse response = httpclient.execute(httppost); step and leads it to IOException, Please indicate my error to resolve the issue. Thanks!

In you current solution you create a thread, but the thread execute you code sequentially and it does not wait for the response from your server. As a result your client get a null response.
Solution : you have to use AsyncTask for retrieve/send data from/to server. Execute data retrieve part in the doBackground method of AsyncTask. And get your response from the postExecute method. See details here

sending GCM message in java

I am new in Java programming. i have developed an android application which send a request to GCM server and in response its getting a registration id which i am send to my java server and on server i am storing it in database. Its working fine :)
For second part i have written http code in java server. with this code i am access the registration id from database and sending it to GCM server with a string message for for device. But i am getting error. my code for http client is here. please can some one help?
public static String REQUEST_URL = "https://android.googleapis.com/gcm/send";
private static String GCM_ID = "APA91bFEnZXT7YRTJm2d5NpbKcpJCuDwEIJjZmwYITIIWIOFIZHEtwYc8S3oN_Upe3RnSvUqcwmntIrMqaF8Vn04b_EZtvoDQMAqt21Zw9Sb9GhNXwVS70yDOjUyRohH7u1RmtTHRrkjaBUueIjS2gD1Uw1cQDJbQg";
/**
* #param args
*/
public static void main(String[] args) {
List<NameValuePair> formparams = new ArrayList<NameValuePair>();
formparams.add(new BasicNameValuePair("registration_id", GCM_ID));
formparams.add(new BasicNameValuePair("data", "this is data mesg"));
// UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams,
// "UTF-8");
HttpClient httpclient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(REQUEST_URL);
httpPost.setHeader("Authorization",
"key=AIzaSyBTgKVWevp0GwM5m2QAuF__39eEI0bclVA");
httpPost.setHeader("Content-Type",
"application/x-www-form-urlencoded;charset=UTF-8");
try {
httpPost.setEntity(new UrlEncodedFormEntity(formparams, "utf-8"));
httpclient.execute(httpPost);
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

I don't know what error you got, but this line :
formparams.add(new BasicNameValuePair("data", "this is data mesg"));
should be :
formparams.add(new BasicNameValuePair("data.message", "this is data mesg"));
Each payload parameter you include in the GCM message should have a name of the form data.<key>.

Sending simple POST by HttpRequest with Android

I want my application to send two strings through the query string to a php file that will handle them as POST variables.
So far I have this code
public void postData() {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("www.mywebsite.com/my_phpfile.php?var1=20&var2=31");
try {
HttpResponse response = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
}
I think it's an easy problem to solve but it's my first android app and I'd appreciate all the help.

Use nameValuePairs to pass data in the POST request.
Try it like this :
public void postData() {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.yoursite.com/yourscript.php");
try {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("id", "123"));
nameValuePairs.add(new BasicNameValuePair("string", "Hey"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
// Catch Protocol Exception
} catch (IOException e) {
// Catch IOException
}
}

Java application terminates at getOutputStream()

I'm creating an application for our Android devices. The aim of this section is to post a username and password (currently just assigned as a string) to a web service and to receive a login token. When running the code, at the getOutputStream() line, my code terminates and will no progress any further.
I have assigned the android emulator GSM access and also set the proxy and DNS server within Eclipse. I'm not sure where to go with it now!
This is within my onHandleIntent():
protected void onHandleIntent(Intent i) {
try{
HttpURLConnection http_conn = (HttpURLConnection) new URL("http://www.XXXXX.com").openConnection();
http_conn.setRequestMethod("POST");
http_conn.setDoInput(true);
http_conn.setDoOutput(true);
http_conn.setRequestProperty("Content-type", "application/json; charset=utf-8");
String login = URLEncoder.encode("XXXXX", "UTF-8") + "=" + URLEncoder.encode("XX", "UTF-8");
login += "&" + URLEncoder.encode("XXXXX", "UTF-8") + "=" + URLEncoder.encode("XX", "UTF-8");
OutputStreamWriter wr = new OutputStreamWriter(http_conn.getOutputStream());
//TERMINATES HERE
wr.write(login);
wr.flush();
BufferedReader rd = new BufferedReader(new InputStreamReader(http_conn.getInputStream()));
String line = rd.toString();
wr.close();
rd.close();
http_conn.disconnect();
}
catch (IOException e){
}
}
This is my first go at java and have only been writing it for a few days so bear with me if I've missed something obvious.
Thanks

If you want to POST something using HTTP, why not use HTTP POST? ;-)
Here is an example snippet:
public void postData() {
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.yoursite.com/script.php");
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("id", "12345"));
nameValuePairs.add(new BasicNameValuePair("stringdata", "AndDev is Cool!"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
}
Source: http://www.androidsnippets.com/executing-a-http-post-request-with-httpclient

This may not be the appropriate answer, but will certainly be helpful to you. I have used this code for sending and receiving the request and reply resp, to a webservice.
This code is working, but will need some Refactoring, as i have used some extra variable, which are not needed.
I have used the NameValuePair here for Post
public String postData(String url, String xmlQuery) {
final String urlStr = url;
final String xmlStr = xmlQuery;
final StringBuilder sb = new StringBuilder();
Thread t1 = new Thread(new Runnable() {
public void run() {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(urlStr);
try {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(
1);
nameValuePairs.add(new BasicNameValuePair("xml", xmlStr));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
Log.d("Vivek", response.toString());
HttpEntity entity = response.getEntity();
InputStream i = entity.getContent();
Log.d("Vivek", i.toString());
InputStreamReader isr = new InputStreamReader(i);
BufferedReader br = new BufferedReader(isr);
String s = null;
while ((s = br.readLine()) != null) {
Log.d("YumZing", s);
sb.append(s);
}
Log.d("Check Now",sb+"");
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} /*
* catch (ParserConfigurationException e) { // TODO
* Auto-generated catch block e.printStackTrace(); } catch
* (SAXException e) { // TODO Auto-generated catch block
* e.printStackTrace(); }
*/
}
});
t1.start();
try {
t1.join();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("Getting from Post Data Method "+sb.toString());
return sb.toString();
}

String line = rd.toString();
should be
String line = rd.readLine();
that might do the trick. rd.toString() gives you a String representation of your BufferedReader. It does not trigger the HTTP operation. I did not test your code, so there might be other errors as well, this was just the obvious one.

Android, HttpPost for WCF

I'm trying to use httpost to get data from our WCF webservice
If the webservice function is without params , something like List getAllMessages()
I'm getting the List in json, no problem here
The tricky part is when the function needs to get argument
let's say Message getMessage(string id)
when trying to call this kind of functions I get error code 500
The working code is:
public String GetAllTitles()
{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(
"http://www.xxx.com/Service/VsService.svc/GetAllTitles");
httppost.setHeader("Content-Type", "application/json; charset=utf-8");
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
return readHttpResponse(response);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
this code works great for functios without arguments..
I took this code and changed it to:
public String SearchTitle(final String id)
{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(
"http://www.xxx.com/Service/VsService.svc/SearchTitle");
httppost.setHeader("Content-Type", "application/json; charset=utf-8");
httppost.setHeader("Accept", "application/json; charset=utf-8");
NameValuePair data = new BasicNameValuePair("id",id);
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(data);
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
return readHttpResponse(response);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
The function header in thr webservice is:
[OperationContract]
public TitleResult SearchTitle(string id)
{
Stopwatch sw = LogHelper.StopwatchInit();
try
{
TitleManager tm = new TitleManager();
Title title = tm.TitleById(id);
sw.StopAndLog("SearchTitle", "id: " + id);
return new TitleResult() { Title = title };
}
catch (Exception ex)
{
sw.StopAndLogException("SearchTitle", ex, "id: " + id);
return new TitleResult() { Message = ex.Message };
}
}
Anyone can see what am I missing?
Thanks, I'm breaking my head over this one.

List isn't json,
try
String data = "{ id : \"" + id + "\" }";
Don't forget to set Content-Length to data.length.