Detectar conexión de datos en android

public boolean networkAvailable() {
	Context context = getApplicationContext();
	ConnectivityManager connectMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
	if (connectMgr != null) {
		NetworkInfo[] netInfo = connectMgr.getAllNetworkInfo();
		if (netInfo != null) {
			for (NetworkInfo net : netInfo) {
				if (net.getState() == NetworkInfo.State.CONNECTED) {
					return true;
				}
			}
		}
	} 
	else {
		Log.d("NETWORK", "No network available");
	}
	return false;
}