Android Dex Method Count more sophisticated scripts that gives you method cound by package @JakeWharton https://gist.github.com/JakeWharton/6002797 and @tsmith https://gist.github.com/tyvsmith/6056422

dexmethodcount

You can add this to your shell profile and then use it as  dexcount file. 
This file should have a classes.dex in order to work, that means it has to be a android lib project or android apk.

count(){
 mkdir temp >/dev/null
 cp $1 temp/$1+copy > /dev/null
 unzip temp/$1+copy -d temp/ > /dev/null
 cat temp/classes.dex | head -c 92 | tail -c 4 | hexdump -e '1/4 "%d\n"'
 rm -R temp > /dev/null	
}

alias dexcount='count'

Gracias! tienes toda la razón. He actualizado el código, además era el que estaba usando ya en mi profile