Question

I want to insert some data into a database using a http post request.
My post.php page is:

      if(trim($_GET['param1'])!="" && trim($_GET['param2'])!="" && trim($_GET['param3'])!="" && trim($_GET['param4'])!="" && trim($_GET['param5'])!="")
{
    $connectionInfo = array(  "UID" => $DB_USER,  "PWD" => $DB_PASS, "Database"=>$DB_DATABASE );
    $con = sqlsrv_connect($DB_SERVER,$connectionInfo);
    if(!$con)
    {
      die('Could not connect: ' . sqlsrv_errors());
    }
    $query="INSERT INTO Table (param1,param2,param3,param4,param5) VALUES (
            '".$_GET['param1']."',
            ".$_GET['param2'].",
            ".$_GET['param3'].",
            '".$_GET['param4']."',
            ".$_GET['param5'].")";
            [...]

and in order to send data, I append all the parameters to the url, like: http://<myip>/MySite/post.php?param2=10&param3=8&param1=2012-12-01 13:00:00&param4=Name&param5=80

and everything works fine, but when I try to send my data from my Android application I could not achive my target.
How can I pass data via url?
In Android I’ve tried:

    HttpPost httppost = new HttpPost("http://<Myip>/MySite/post.php");
    List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(5);
    nameValuePairs.add(new BasicNameValuePair("param2", "10"));
    nameValuePairs.add(new BasicNameValuePair("param3", "98"));
    nameValuePairs.add(new BasicNameValuePair("param1", "2012-12-01 13:00:00"));
    nameValuePairs.add(new BasicNameValuePair("param4", "Name"));
    nameValuePairs.add(new BasicNameValuePair("param5", "50"));
    //httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, "UTF-8"));
    httppost.setHeader("Content-Type", "application/x-www-form-urlencoded");
    httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));  

    // Execute HTTP Post Request
    HttpResponse response = httpclient.execute(httppost)

and with:

String urlParameters = "param1=2012-12-01 13:00:00&param2=b&param3=c...";
String request = "http://<Myip>/MySite/post.php";
URL url = new URL(request); 
HttpURLConnection connection = (HttpURLConnection) url.openConnection();           
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setInstanceFollowRedirects(false); 
connection.setRequestMethod("POST"); 
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); 
connection.setRequestProperty("charset", "utf-8");
connection.setRequestProperty("Content-Length", ""  Integer.toString(urlParameters.getBytes().length));
connection.setUseCaches (false);
DataOutputStream wr = new DataOutputStream(connection.getOutputStream ());
wr.writeBytes(urlParameters);
wr.flush();
wr.close();
connection.disconnect();

but I always get errors.
Using second method the exception is:

12-17 18:08:26.617: E/AndroidRuntime(4837): FATAL EXCEPTION: main
12-17 18:08:26.617: E/AndroidRuntime(4837): android.os.NetworkOnMainThreadException
12-17 18:08:26.617: E/AndroidRuntime(4837):     at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at libcore.io.IoBridge.connect(IoBridge.java:112)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at java.net.Socket.connect(Socket.java:842)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at libcore.net.http.HttpConnection.<init>(HttpConnection.java:77)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:351)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:86)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:308)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at libcore.net.http.HttpEngine.connect(HttpEngine.java:303)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:282)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:232)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at libcore.net.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:188)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at  com.example.applic.applic.postData(MyApp.java:197)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at com.example.applic.applic$1.run(MyApp.java:127)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at android.os.Handler.handleCallback(Handler.java:605)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at android.os.Handler.dispatchMessage(Handler.java:92)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at android.os.Looper.loop(Looper.java:137)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at android.app.ActivityThread.main(ActivityThread.java:4514)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at java.lang.reflect.Method.invokeNative(Native Method)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at java.lang.reflect.Method.invoke(Method.java:511)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
12-17 18:08:26.617: E/AndroidRuntime(4837):     at dalvik.system.NativeStart.main(Native Method)

What can I do?

Answer 1

NetworkOnMainThreadException :

The exception that is thrown when an application attempts to perform a
networking operation on its main thread.

means you are trying to run network operation from UI Thread so put your all network related code inside AsyncTask‘s doInBackground method and use onPostExecute for updating UI when doInBackground method execution complete

and if your are using API LEVEL 9 or GREATER FROM 9 then add StrictMode in onCreate of Activity to avoid this error

StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
                 .detectDiskReads()
                 .detectDiskWrites()
                 .detectNetwork()  
                 .penaltyLog()
                 .build());