Check for Wifi and see whether internet is reachable or not

package com.example.checkinternetconnection;

import java.io.IOException;

import java.net.HttpURLConnection;
import java.net.URL;
import android.app.Activity;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.view.Menu;

public class MainActivity extends Activity {
   
   
    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        StrictMode.setThreadPolicy(policy);
        ConnectivityManager cm =
                (ConnectivityManager)getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
       
        NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
        boolean isConnected = activeNetwork != null &&
                              activeNetwork.isConnectedOrConnecting();
        System.out.println("internet connection is "+isConnected);
       
       
         boolean isReachable = false;
       
         if (activeNetwork != null && activeNetwork.isConnected()) {
                // Some sort of connection is open, check if server is reachable
                try {
                    URL url = new URL("http://www.google.com");
                    HttpURLConnection urlc = (HttpURLConnection) url.openConnection();
                    urlc.setRequestProperty("User-Agent", "Android Application");
                    urlc.setRequestProperty("Connection", "close");
                    urlc.setConnectTimeout(30 * 1000);
                    urlc.connect();
                    isReachable = (urlc.getResponseCode() == 200);
                    System.out.println("internet reachable true");
                } catch (IOException e) {
              
                   
                      System.out.println("internet reachable false"+e.getMessage());
                    Log.e("internet", e.getMessage());
                }
            }
       
       
       
       
       
           
       
       
    }

    @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;
    }

}


Manifest Changes :
-----------------------------------
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.checkinternetconnection"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="10"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.checkinternetconnection.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

</manifest>