Check Internet Connection

ConnectivityManager cn = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

          NetworkInfo nf = cn.getActiveNetworkInfo();

          if (nf != null && nf.isConnected() == true) {

                 Toast.makeText(getApplicationContext(),                                                                      "Internet Connected.", Toast.LENGTH_LONG).show();

          } else {

          

                 Toast.makeText(getApplicationContext(),

                                                                      "No Internet.", Toast.LENGTH_LONG).show();

          }