String _message ="this is my long message which needs to be split in to two string after 160 characters. This is a long message. This is a long message. This is a long message. This is a long message. This is a long message.";
Part 1: this is my long message which needs to be split in to two string after 160 characters. This is a long message. This is a long message. This is a long message. T
rest of message: his is a long message. This is a long message.