Make android and ios icons from hi res image

make_icons.sh

#!/bin/sh
 #
 # Thomas Haukland

 original=`echo $1 | sed 's/.png//'`

 rm -rf ios droid

 # iOS
 mkdir ios
 for size in 20 29 40 58 60 76 80 87 120 152 167 180 512 1024; do
     newname="$original-$size.png"
     newfile="ios/$newname"
     cp $1 $newfile
     sips -Z $size $newfile
 done;

 # droid
 mkdir droid
 for dpiAndSize in "ldpi-36" "mdpi-48" "hdpi-72" "xhdpi-96" "xxhdpi-144" "xxxhdpi-192"; do
     dpifolder=`echo $dpiAndSize | sed "s/-.*//"`
     dpifolder="drawable-$dpifolder"
     mkdir "droid/$dpifolder"
     size=`echo $dpiAndSize | sed "s/.*-//"`
     newfile="droid/$dpifolder/icon.png"
     cp $1 $newfile
     sips -Z $size $newfile
 done;