Check Internet connectivity in android

Many applications connect to Internet to perform certain tasks, so in this tutorial we will see how to create a java class to check the internet connection of mobile. So lets begin.



Step 1- we need to provide permission in manifest file.

<manifest>   
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

     <application...
    ...............
    </activity>
</manifest>

Step 2- create below function after onCreate() method to check Internet connection.

protected boolean isOnline() 

{
   ConnectivityManager cm = (ConnectivityManager) getSystemService (Context.CONNECTIVITY_SERVICE);
   NetworkInfo netInfo = cm.getActiveNetworkInfo();   

    if (netInfo != null && netInfo.isConnectedOrConnecting()) 

      {return true;}  

    else 
      {return false;}
}

Step 3: we can now call above function in onClick listener of any component of android.

// Check for Internet Connection
if (isOnline() )

{
   Toast.makeText(getApplicationContext(), "Internet Connected", Toast.LENGTH_SHORT).show();
}

else 

{  Toast.makeText(getApplicationContext(), "No Internet Connection", Toast.LENGTH_SHORT).show();

}