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 nee d 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())    ...