android - why this Error is Comming -


i want simplily android app connect php mysql, read many tutorial of php , mysql connect php android app every 1 running on emmulor, have no real device,so use emmulator testing.

why error commingfrom code

my java file

import java.io.bufferedreader; import java.io.inputstream; import java.io.inputstreamreader; import java.util.arraylist;  import org.apache.http.httpentity; import org.apache.http.httpresponse; import org.apache.http.namevaluepair; import org.apache.http.client.httpclient; import org.apache.http.client.entity.urlencodedformentity; import org.apache.http.client.methods.httppost; import org.apache.http.impl.client.defaulthttpclient; import org.apache.http.message.basicnamevaluepair; import org.json.jsonobject;  import android.support.v7.app.actionbaractivity; import android.support.v7.app.actionbar; import android.support.v4.app.fragment; import android.os.bundle; import android.util.log; import android.view.layoutinflater; import android.view.menu; import android.view.menuitem; import android.view.view; import android.view.viewgroup; import android.widget.button; import android.widget.edittext; import android.widget.toast; import android.os.build;  public class mainactivity extends actionbaractivity {  string name; string id; inputstream is=null; string result=null; string line=null; int code;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      final edittext e_id=(edittext) findviewbyid(r.id.edittext1);     final edittext e_name=(edittext) findviewbyid(r.id.edittext2);     button insert=(button) findviewbyid(r.id.button1);      insert.setonclicklistener(new view.onclicklistener() {      @override     public void onclick(view v) {         // todo auto-generated method stub          id = e_id.gettext().tostring();         name = e_name.gettext().tostring();          insert();     } }); }     public void insert()      {     arraylist<namevaluepair> namevaluepairs = new arraylist<namevaluepair>          ();  namevaluepairs.add(new basicnamevaluepair("id",id)); namevaluepairs.add(new basicnamevaluepair("name",name));      try     {     httpclient httpclient = new defaulthttpclient();         httppost httppost = new httppost("http://127.0.0.1/android/insert.php");         httppost.setentity(new urlencodedformentity(namevaluepairs));         httpresponse response = httpclient.execute(httppost);          httpentity entity = response.getentity();         = entity.getcontent();         log.e("pass 1", "connection success ");      }       catch(exception e)      {         log.e("fail 1", e.tostring());         toast.maketext(getapplicationcontext(), "invalid ip address",         toast.length_long).show();      }            try       {         bufferedreader reader = new bufferedreader         (new inputstreamreader(is,"iso-8859-1"),8);         stringbuilder sb = new stringbuilder();         while ((line = reader.readline()) != null)          {             sb.append(line + "\n");           }         is.close();         result = sb.tostring();     log.e("pass 2", "connection success "); }     catch(exception e) {         log.e("fail 2", e.tostring()); }       try {         jsonobject json_data = new jsonobject(result);         code=(json_data.getint("code"));          if(code==1)         {     toast.maketext(getbasecontext(), "inserted successfully",         toast.length_short).show();         }         else         {      toast.maketext(getbasecontext(), "sorry, try again",         toast.length_long).show();         } } catch(exception e) {         log.e("fail 3", e.tostring()); } }   @override public boolean oncreateoptionsmenu(menu menu) {     getmenuinflater().inflate(r.menu.main, menu);     return true;  }

}

this php file

<?php $host="127.0.0.1";     $db="android"; $uname="root"; $pwd="";      $con = mysqli_connect("$host","$uname","$pwd") or die("connection failed"); mysqli_select_db($con,$db) or die("db selection failed");  $id=(isset($_request['id']) )?$_request['id']: ''; $name=(isset($_request['name']) ) ? $_reqest['name']: '';  $flag['code']=0;  if($r=mysqli_query("insert sample values('$id','$name')   ,$con")) {     $flag['code']=1;     echo"hi"; }  print(json_encode($flag)); mysqli_close($con); ?>

and logcat window

09-30 03:35:16.800: e/fail 1(1064): android.os.networkonmainthreadexception 09-30 03:35:16.870: e/fail 2(1064): java.lang.nullpointerexception: lock ==    null 09-30 03:35:16.870: e/fail 3(1064): java.lang.nullpointerexception

this exception thrown when application attempts perform networking operation on main thread. run code in asynctask:

 private class networktask extends asynctask<string, void, void> {          protected void doinbackground(string... urls) {             try {              <!--your network stuff goes here -->              } catch (exception e) {              }         }          protected void onpostexecute(void resut) {             // todo: feed         }     }

Comments

Post a Comment

Popular posts from this blog

html - Outlook 2010 Anchor (url/address/link) -

i'm trying link specific pdf page msoutlook'10 or msword'10, #page=... anchor particularly useful , works fine elsewhere. unfortunately when click [ctr-k] in outlook or winword, links re-formatted assuming unc path. pdf file located on shared drive. using "file:" prefix links open pdf in adobe reader (outside of browser), , "http:" open inside browser. issue seem need open in browser "file:" prefix in order anchor work. know anchors work inside browser. outlook uses windows/explorer default program (based on file extension) seems open in adobe reader neglecting anchor. is aware of solution, link specific page or bookmark of shared-pdf ms outlook and/or winword link? common references: mailermailer.com/...anchor-tags-html-emails campaignmonitor.com/...anchor-links-in-email-newsletters/ stackoverflow.com/...anchor-in-pdf-document
Read more

javascript - Why does running this loop 9 times take 100x longer than running it 8 times? -

consider code: test = function() { } t = new test(); (var = 0; < 8; i++) { result = t instanceof test; } if change number of iterations 8 9 , loop take 100 times longer complete in latest version of firefox (41.0.1). tested on 2 different pcs , magic limit 8. here jsperf test used: http://jsperf.com/instanceof-8-times-vs-9-times does have idea why might happen? seems specific instanceof . not happen if else object, example check property. note: filed bugzilla bug this. jan de mooij mozilla team has posted details in bugzilla thread . here's simplistic interpretation of highly technical answers: in i < 8 case, firefox smart enough hoist result = t instanceof test; statement out of loop (according tests, doesn't seem omit altogether). in i < 9 case, apparently doesn't optimization . why? reason not clear, related fact 9 iterations threshold above function considered "hot" enough run through jit compiler. i < 8 cas...
Read more

Getting gateway time-out Rails app with Nginx + Puma running on Digital Ocean -

following this guide setup app on digital ocean droplet, not working. site not loading , it's throwing: "gateway time-out". the puma server works, since ps aux | grep puma prints: root 15878 0.0 0.4 376832 2168 ? sl 12:50 0:00 puma 2.13.4 (unix:///var/www/myapp/shared/tmp/sockets/myapp-puma.sock) [20150930164940] root 15881 0.0 0.7 903676 3692 ? sl 12:50 0:06 puma: cluster worker 0: 15878 [20150930164940] root 24654 0.0 0.1 11748 916 pts/2 s+ 18:00 0:00 grep --color=auto puma my nginx config: user root; worker_processes 1; events { worker_connections 1024; } http { upstream puma { server unix:///var/www/myapp/shared/tmp/sockets/myapp-puma.sock; } server { listen 80; server_name myapp.com; root /var/www/myapp/current/public; access_log /var/www/myapp/current/log/access.log; error_log /...
Read more