title: java.net.UnknownHostException error although there is a valid connection the to website
body: <p>I am having two android applications..The first of them consists of an edit text with a button and an image view ...clicking the button will invoke a connection to website and download an image to the image view...This applications works well
  this is the xml of first application:</p>
  
  <pre><code>    &lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      xmlns:tools="http://schemas.android.com/tools"
      android:id="@+id/activity_main"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:paddingBottom="@dimen/activity_vertical_margin"
      android:paddingLeft="@dimen/activity_horizontal_margin"
      android:paddingRight="@dimen/activity_horizontal_margin"
      android:paddingTop="@dimen/activity_vertical_margin"
      tools:context="arb.myapplication.MainActivity"&gt;
  
      &lt;ImageView
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          app:srcCompat="@mipmap/ic_launcher"
          android:layout_alignParentBottom="true"
          android:layout_marginBottom="131dp"
          android:id="@+id/imageView"
          android:visibility="invisible"/&gt;
  
      &lt;Button
          android:text="Button"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_alignParentRight="true"
          android:layout_alignParentEnd="true"
          android:layout_marginRight="39dp"
          android:layout_marginEnd="39dp"
          android:layout_marginTop="11dp"
          android:id="@+id/button3"
          android:elevation="0dp" /&gt;
  
      &lt;EditText
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:inputType="textPersonName"
          android:ems="10"
          android:layout_below="@+id/button3"
          android:layout_alignParentLeft="true"
          android:layout_alignParentStart="true"
          android:layout_marginLeft="26dp"
          android:layout_marginStart="26dp"
          android:layout_marginTop="47dp"
          android:id="@+id/editText"
          android:background="@android:color/background_light"
          android:textColor="@android:color/background_dark" /&gt;
  
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>and here is the java file of the first application</p>
  
  <pre><code>    package arb.myapplication;
  
  import android.graphics.Bitmap;
  import android.graphics.BitmapFactory;
  import android.graphics.drawable.BitmapDrawable;
  import android.os.AsyncTask;
  import android.support.v7.app.AppCompatActivity;
  import android.os.Bundle;
  import android.view.View;
  import android.widget.Button;
  import android.widget.EditText;
  import android.widget.ImageView;
  import android.widget.RelativeLayout;
  import android.widget.Toast;
  
  import org.jsoup.Connection;
  import org.jsoup.Jsoup;
  import org.jsoup.nodes.Attribute;
  import org.jsoup.nodes.Attributes;
  import org.jsoup.nodes.Document;
  import org.jsoup.nodes.Element;
  import org.jsoup.select.Elements;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.net.URL;
  
  
  public class MainActivity extends AppCompatActivity {
  
      class DownloadIcon extends AsyncTask&lt;String, Object, Integer&gt;
      {
          String uri="";
  
          public DownloadIcon(String s) {uri=s;
          }
  
  
          @Override
          protected Integer doInBackground(String... objects) {
              Connection connecion= Jsoup.connect("http://icons.better-idea.org/icons?url="+uri+"#result");
              Document document= null;
              try {
                  document = connecion.get();
              } catch (IOException e) {
                  e.printStackTrace();
              }
              Element element=document.select("td.url").first().child(0);
              String url=element.attr("href");
              InputStream inputStream= null;
              try {
                  inputStream = new URL(url).openStream();
              } catch (IOException e) {
                  e.printStackTrace();
              }
              Bitmap bitmap=BitmapFactory.decodeStream(inputStream);
              publishProgress(bitmap);
              return 0;
          }
  
          @Override
          protected void onProgressUpdate(Object... values) {
              ImageView imageView=(ImageView) findViewById(R.id.imageView);
              imageView.setVisibility(View.VISIBLE);
              Bitmap bitmap=(Bitmap) values[0];
              imageView.setImageBitmap(bitmap);
              //Toast.makeText(getBaseContext(),values[0].toString(),Toast.LENGTH_LONG).show();
          }
  
          @Override
          protected void onPostExecute(Integer integer) {
              Toast.makeText(getBaseContext(),"done",Toast.LENGTH_SHORT).show();
          }
      }
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          Button button3=(Button) findViewById(R.id.button3);
          button3.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View view) {
                  EditText editText=(EditText) findViewById(R.id.editText);
                  new DownloadIcon(editText.getText().toString()).execute();
  
              }
          });
      }
  }
  </code></pre>
  
  <p>I copied the code of downloading the image to the second application and did some small changes to it but it is not working well any more 
  This is the xml code which is not important as the download process runs when calling <code>onResume()</code></p>
  
  <pre><code>    &lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      xmlns:tools="http://schemas.android.com/tools"
      android:id="@+id/activity_main"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:paddingBottom="@dimen/activity_vertical_margin"
      android:paddingLeft="@dimen/activity_horizontal_margin"
      android:paddingRight="@dimen/activity_horizontal_margin"
      android:paddingTop="@dimen/activity_vertical_margin"
      tools:context="arb.passwordmanager.MainActivity"
      android:background="@drawable/green_background"&gt;
  
      &lt;android.support.v7.widget.RecyclerView
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:id="@+id/grid"&gt;
  
  
      &lt;/android.support.v7.widget.RecyclerView&gt;
  
      &lt;android.support.design.widget.FloatingActionButton
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:clickable="true"
          app:fabSize="mini"
          app:srcCompat="@android:drawable/ic_menu_add"
          android:id="@+id/floatingActionButton"
          app:elevation="0dp"
          app:backgroundTint="#66FF66"
          android:layout_alignParentBottom="true"
          android:layout_alignParentRight="true"
          android:layout_alignParentEnd="true" /&gt;
      &lt;ImageView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:visibility="gone"
          android:src="@android:drawable/ic_delete"
          android:id="@+id/delete"/&gt;
  
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>this is the java file</p>
  
  <pre><code>    package arb.passwordmanager;
  
  import android.content.Intent;
  import android.content.SharedPreferences;
  import android.database.Cursor;
  import android.database.sqlite.SQLiteDatabase;
  import android.graphics.Bitmap;
  import android.graphics.BitmapFactory;
  import android.graphics.Color;
  import android.graphics.drawable.BitmapDrawable;
  import android.os.AsyncTask;
  import android.provider.ContactsContract;
  import android.support.design.widget.FloatingActionButton;
  import android.support.v7.app.ActionBar;
  import android.support.v7.app.AppCompatActivity;
  import android.os.Bundle;
  import android.support.v7.widget.GridLayoutManager;
  import android.support.v7.widget.RecyclerView;
  import android.text.Html;
  import android.view.Menu;
  import android.view.MenuItem;
  import android.view.View;
  import android.webkit.WebView;
  import android.widget.Button;
  import android.widget.ImageView;
  import android.widget.TextView;
  import android.widget.Toast;
  
  import org.jsoup.Connection;
  import org.jsoup.Jsoup;
  import org.jsoup.nodes.Document;
  import org.jsoup.nodes.Element;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.IOException;
  import java.io.InputStream;
  import java.net.URL;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Objects;
  
  import yellow5a5.actswitchanimtool.ActSwitchAnimTool;
  
  public class MainActivity extends AppCompatActivity {
  
      Menu mMenu;
      void check_password_checked()
      {
          Boolean b=getIntent().getExtras().getBoolean("checked");
          if(!b)finish();
      }
  
      void receive_animation()
      {
          if(getIntent().getExtras().getBoolean("animation"))
          {
              FloatingActionButton fab=(FloatingActionButton) findViewById(R.id.floatingActionButton);
              new ActSwitchAnimTool(this)
                      .receiveIntent(getIntent())
                      .setAnimType(ActSwitchAnimTool.MODE_SHRINK)
                      .target(fab)
                      .build();
          }
      }
  
      void set_fab_click()
      {
          FloatingActionButton fab=(FloatingActionButton) findViewById(R.id.floatingActionButton);
          fab.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View view) {
                  FloatingActionButton fab=(FloatingActionButton) findViewById(R.id.floatingActionButton);
                  Intent i=new Intent(getBaseContext(),add_account_activity.class);
                  ActSwitchAnimTool asat=new ActSwitchAnimTool(MainActivity.this).setAnimType(0)
                          .target(fab)
                          .setShrinkBack(false)
                          .setmColorStart(Color.parseColor("#66FF66"))
                          .setmColorEnd(Color.parseColor("#66FF66"))
                          .startActivity(i,false)
                          ;
                  asat.setAnimType(0).build();
              }
          });
      }
  
      GridLayoutManager gridLayoutManager;
      RecyclerView recyclerView;
      List &lt;Item&gt; items;
      void set_spans()
      {
          SharedPreferences sharedPreferences=getSharedPreferences("view",MODE_PRIVATE);
          Boolean b=sharedPreferences.getBoolean("grid",true);
          if(b)gridLayoutManager=new GridLayoutManager(this,3);
          else gridLayoutManager=new GridLayoutManager(this,1);
          recyclerView=(RecyclerView) findViewById(R.id.grid);
          recyclerView.setLayoutManager(gridLayoutManager);
      }
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
          check_password_checked();
          receive_animation();
          set_fab_click();
          set_spans();
      }
  
      class DownloadIcon extends AsyncTask&lt;Object, Object, Integer&gt;
      {
  
          //String uri="";
  
          //public DownloadIcon(String s) {uri=s;
          //}
  
  
          @Override
          protected Integer doInBackground(Object... objects) {
              Connection connecion= Jsoup.connect("http://www.icons.better-idea.org/icons?url="+objects[0].toString()+"#result");
  
              try {
                  Document document= connecion.get();
                  Element element=document.select("td.url").first().child(0);
                  String url=element.attr("href");
                  InputStream inputStream = new URL(url).openStream();
                  Bitmap bitmap=BitmapFactory.decodeStream(inputStream);
                  //publishProgress(bitmap);
              } catch (IOException e) {
                  publishProgress("http://www.icons.better-idea.org/icons?url="+objects[0].toString()+"#result");
                  e.printStackTrace();
  
              }
  
              return 0;
          }
  
          @Override
          protected void onProgressUpdate(Object... values) {
             /* ImageView imageView=(ImageView) findViewById(R.id.imageView);
              imageView.setVisibility(View.VISIBLE);
              Bitmap bitmap=(Bitmap) values[0];
              imageView.setImageBitmap(bitmap);*/
              //Toast.makeText(getBaseContext(),values[0].toString(),Toast.LENGTH_LONG).show();
              Toast.makeText(getBaseContext(),values[0].toString(),Toast.LENGTH_LONG).show();
          }
  
          @Override
          protected void onPostExecute(Integer integer) {
              Toast.makeText(getBaseContext(),"done",Toast.LENGTH_SHORT).show();
          }
      }
  
      String correct_url(String s)
      {
          s=s.replace(" ","");
          if(!s.contains("."))s+=".com";
          else if(s.lastIndexOf(".")&lt;s.length()-4)s+=".com";
          return s;
      }
  
      void init_data()
      {
          database d=new database(this,database.DATABASE_NAME,null,database.DATABASE_VERSION);
          SQLiteDatabase sqLiteDatabase=d.getReadableDatabase();
          Cursor cursor=sqLiteDatabase.rawQuery("SELECT * FROM "+database.TABLE_ACCOUNTS,null);
          items=new ArrayList&lt;&gt;(cursor.getCount());
  
          if(cursor.getCount()&gt;0)
          {
              cursor.moveToFirst();
              do {
                  File file =new File(String.valueOf(getFilesDir()),cursor.getString(0));
                  Bitmap b =null;
                  try {
                      b= BitmapFactory.decodeStream(new FileInputStream(file));
                      items.add(new Item(cursor.getString(0),cursor.getString(1),b));
                  } catch (FileNotFoundException e) {
                      new DownloadIcon().execute(correct_url(cursor.getString(0)),b);
                  }
                  //items.add(new Item(cursor.getString(0),cursor.getString(1)))
              }while (cursor.moveToNext());
          }
      }
  
      @Override
      protected void onResume() {
          super.onResume();
          init_data();
      }
  
      @Override
      public boolean onCreateOptionsMenu(Menu menu) {
          mMenu=menu;
          SharedPreferences sharedPreferences=getSharedPreferences("view",MODE_PRIVATE);
          Boolean b= sharedPreferences.getBoolean("grid",true);
          if(b)getMenuInflater().inflate(R.menu.edit_password,menu);
          else getMenuInflater().inflate(R.menu.list_view,menu);
          return true;
      }
  
      void settings()
      {
          Intent i=new Intent(this,Settings.class);
          i.putExtra("checked",true);
                  startActivity(i);
  
      }
  
      void fab_click()
      {
      FloatingActionButton fab=(FloatingActionButton) findViewById(R.id.floatingActionButton);
          fab.performClick();
      }
  
      void list_view()
      {
          mMenu.clear();
          getMenuInflater().inflate(R.menu.edit_password,mMenu);
          SharedPreferences sharedPreferences=getSharedPreferences("view",MODE_PRIVATE);
          SharedPreferences.Editor editor=sharedPreferences.edit().putBoolean("grid",true);
          editor.commit();
          gridLayoutManager.setSpanCount(3);
      }
  
      void grid_view()
      {
          mMenu.clear();
          getMenuInflater().inflate(R.menu.list_view,mMenu);
          SharedPreferences sharedPreferences=getSharedPreferences("view",MODE_PRIVATE);
          SharedPreferences.Editor editor=sharedPreferences.edit().putBoolean("grid",false);
          editor.commit();
          gridLayoutManager.setSpanCount(1);
      }
  
      @Override
      public boolean onOptionsItemSelected(MenuItem item) {
          switch (item.getItemId())
          {
              case R.id.settings_menu :
                  settings();
                  return true;
              case R.id.add_new_account_menu:
                  fab_click();
                  return true;
              case R.id.list_view:
                  list_view();
                  return true;
              case R.id.grid_view:
                  grid_view();
                  return true;
              default: return true ;
  
          }
      }
  }
  </code></pre>
  
  <p>the only important part is the <code>init_data()</code> void that runs in onResume()
  it checks the database for specific data and search it and downloads image 
  I used "facebook.com"  as a parameter to send to the async task but it is not working although it works in the first application</p>
  
  <p>it returns the folowing error </p>
  
  <pre><code>W/System.err: java.net.UnknownHostException: Unable to resolve host "www.icons.better-idea.org": No address associated with hostname
  W/System.err:     at java.net.InetAddress.lookupHostByName(InetAddress.java:424)
  W/System.err:     at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
  W/System.err:     at java.net.InetAddress.getAllByName(InetAddress.java:214)
  W/System.err:     at libcore.net.http.HttpConnection.&lt;init&gt;(HttpConnection.java:70)
  W/System.err:     at libcore.net.http.HttpConnection.&lt;init&gt;(HttpConnection.java:50)
  W/System.err:     at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:362)
  W/System.err:     at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
  W/System.err:     at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
  W/System.err:     at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:316)
  W/System.err:     at libcore.net.http.HttpEngine.connect(HttpEngine.java:311)
  W/System.err:     at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:290)
  W/System.err:     at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:240)
  W/System.err:     at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:81)
  W/System.err:     at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:652)
  W/System.err:     at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:629)
  W/System.err:     at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:261)
  W/System.err:     at org.jsoup.helper.HttpConnection.get(HttpConnection.java:250)
  W/System.err:     at arb.passwordmanager.MainActivity$DownloadIcon.doInBackground(MainActivity.java:125)
  W/System.err:     at arb.passwordmanager.MainActivity$DownloadIcon.doInBackground(MainActivity.java:111)
  W/System.err:     at android.os.AsyncTask$2.call(AsyncTask.java:287)
  W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:234)
  W/System.err:     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
  W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
  W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
  W/System.err:     at java.lang.Thread.run(Thread.java:856)
  W/System.err: Caused by: libcore.io.GaiException: getaddrinfo failed: EAI_NODATA (No address associated with hostname)
  W/System.err:     at libcore.io.Posix.getaddrinfo(Native Method)
  W/System.err:     at libcore.io.ForwardingOs.getaddrinfo(ForwardingOs.java:59)
  W/System.err:     at java.net.InetAddress.lookupHostByName(InetAddress.java:405)
  W/System.err:   ... 24 more
  W/System.err: Caused by: libcore.io.ErrnoException: getaddrinfo failed: ENOENT (No such file or directory)
  W/System.err:   ... 27 more
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/dalvikvm: GC_EXPLICIT freed 2905K, 21% free 14545K/18344K, paused 4ms+4ms, total 37ms
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4d6c1ab8, 0x4d6c1ab8) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglDestroySurface() surface: 0x4d6c1ab8, android window 0x4c056218, Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  D/HAWAII_EGL: eglMakeCurrent(0x40c84968, 0x4c1a4cf0, 0x4c1a4cf0) Thread: 4807
  D/HAWAII_EGL: eglDestroyContext() context: 0x40c84968, VC context: 1, Thread 4807
  E/HAWAII_EGL: Destroying surface without window
  D/HAWAII_EGL: Destroying context in eglMakeCurrent
  D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 4807
  Disconnected from the target VM, address: 'localhost:8601', transport: 'socket'
  </code></pre>
  
  <p>I searched for a solution for this problem and find one of the following:
  I should include internet uses permission which I did
  Then I should provide a good internet connection and make sure the server is working 
  But the first application is working fine while the other does not although they use the same internet connection and connects to the same server and use the same url
  help me please</p>