Move images named in iOS convention to Android resource directories convention

ios2android.sh

#!/bin/bash

# Moves ios images (file.png, file@2x.png, file@3x.png) into android drawable folders (drawable-mdpi, drawable-xhdpi, drawable-xxhdpi) and normalises file names.
# Simplified version of https://github.com/Ninjanetic/ios2android MIT License (MIT)

rm -rf drawable-mdpi
rm -rf drawable-xhdpi
rm -rf drawable-xxhdpi
mkdir drawable-mdpi
mkdir drawable-xhdpi
mkdir drawable-xxhdpi

function image2drawable {
    x=${1/$2./.}
    if [[ ${x} =~ -568h ]]; then
        x=${x/-568h./.}
    fi
    x=${x//-/_}

    if [[ ${x} =~ ^[0-9] ]]; then
        x="img_${x}"
    fi

    x=`echo $x | tr "[:upper:]" "[:lower:]"`
    echo $1
    cp $1 $3/$x
}

for ii in *.jpg *.png; do 
    if [ -f $ii ];
    then
        if [[ ${ii} =~ @3x ]]; then
            image2drawable ${ii} @3x drawable-xxhdpi
        elif [[ ${ii} =~ @2x ]]; then
            image2drawable ${ii} @2x drawable-xhdpi
        else
            image2drawable ${ii} "" drawable-mdpi
        fi
    fi
done