Go app that separates the list of android drawables. It expects icons to have ...-xhdpi.png suffix on all items.

separate-android-drawables.go

package main

import (
	"os"
    "strings"
    "io/ioutil"
)

func main() {
    files, _ := ioutil.ReadDir("./")
    for _, f := range files {

        fileName := f.Name()
        if !strings.Contains(fileName, ".") {
            continue
        }

        fileParts := strings.Split(fileName, ".")
        if !strings.EqualFold(fileParts[1], "png") {
        	continue;
        }

        fileNameParts := strings.Split(fileParts[0], "-")
    	drawableFolderName := fileNameParts[len(fileNameParts)-1:][0]

    	if _, err := os.Stat(drawableFolderName); os.IsNotExist(err) {
		    os.Mkdir("drawable-" + drawableFolderName, os.ModePerm)
		}

		fileNameWithoutDrawableRes := strings.Replace(fileName, "-" + drawableFolderName, "", -1)
    
		os.Rename(fileName, "drawable-" + drawableFolderName + "/" + fileNameWithoutDrawableRes)
    }
}