other.gradle

// Converts the SVG launcher icon to multiple resolution PNGs
task makeIcons << {
    def dir_res = 'app/res/'
    def dir_svg = 'images/'

    def launcher_fn_svg = 'ic_launcher.svg'
    def launcher_fn_png = 'ic_launcher.png'

    def sizeLogo = 512
    def sizeMap = [ 'mdpi': 48, 'hdpi': 72, 'xhdpi': 96, 'xxhdpi': 144, 'xxxhdpi': 192 ]

    def convertSvg = {
        size, dir_in, dir_out ->
            println "Converting launcher icon into ${dir_out} ..."
            def output1 = exec {
                commandLine 'mkdir', '-p', dir_out
            }
            def output2 = exec {
                commandLine 'rsvg-convert', '-f', 'png', '-w', size, '-h', size, '-o', dir_out + launcher_fn_png, dir_in + launcher_fn_svg
            }
    }

    convertSvg(sizeLogo, dir_svg, dir_svg)

    sizeMap.each {
        key, val -> convertSvg(val, dir_svg, dir_res + 'drawable-' + key + '/')
    }
}