android_sms_backup_parser.rb

require "oga"
input = "" # sms backup xml file
output = "" #sms export txt file
file = File.open(input, "r:UTF-8")

from_hash = {"1" => "From", "2" => "Me"}
messages = []
document = Oga.parse_xml(file)
document.xpath("allsms/sms").each do |node|
  messages << "#{from_hash[node.get(:type)]} (#{node.get(:time)}): #{node.get(:body)}".encode("UTF-8")
end

messages = messages.reverse
file.close

output = File.open(output, "w:UTF-8") do |file|
  file.write(messages.join("\r\n"))
end