The proper way to determine network connectivity in Android.

Connectivity.java

	/**
	 * This static method determines if we have network connectivity at this moment.
	 * @param context the app context
	 * @return true if network is up and available, false otherwise
	 */
	public static boolean isOnline(Context context) {
		ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
		NetworkInfo ni = cm.getActiveNetworkInfo();
		return (ni != null && ni.isAvailable() && ni.isConnected());
	}

	// Not necessary, but to trigger an event when network status changes,
	// include the following in your Activity / Fragment

	@Override
	public void onResume() {
		super.onResume();
		IntentFilter filter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
		registerReceiver(mConnReceiver, filter);
	}

	@Override
	public void onPause() {
		super.onPause();
		unregisterReceiver(mConnReceiver);
	}

	private BroadcastReceiver mConnReceiver = new BroadcastReceiver() {
		@Override
		public void onReceive(Context context, Intent intent) {
			if (isOnline(context)) {
			    //TODO
			}
		}
	};