Derivation of images into Android drawable folders

android_image_folders.sh

#!/bin/sh

# GOAL
# Convert images png or jpg into Android drawable folder and convert into webp

# HOW TO USE IT
# · Setup: "brew install imagemagick" // https://formulae.brew.sh/formula/imagemagick
# · Place your images in the same folder of this script
# · Run the script

# POST SCRIPTUM
# Adapted from https://stackoverflow.com/a/25355105/12057504

BASE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"

pushd "${BASE_DIR}" || exit

  rm -rf drawable-xxxhdpi
  rm -rf drawable-xxhdpi
  rm -rf drawable-xhdpi
  rm -rf drawable-hdpi
  rm -rf drawable-mdpi
  mkdir -p drawable-xxxhdpi
  mkdir -p drawable-xxhdpi
  mkdir -p drawable-xhdpi
  mkdir -p drawable-hdpi
  mkdir -p drawable-mdpi

  for path in *.png; do
    if [ "$path" = "*.png" ]; then
      echo "Skip png"
    else
      echo "Creating different drawable dimensions for: ${path}"
      if [ "$path" = "ic_launcher.png" ]; then
          convert ic_launcher.png -resize 144x144 drawable-xxhdpi/ic_launcher.png
          convert ic_launcher.png -resize 96x96 drawable-xhdpi/ic_launcher.png
          convert ic_launcher.png -resize 72x72 drawable-hdpi/ic_launcher.png
          convert ic_launcher.png -resize 48x48 drawable-mdpi/ic_launcher.png
          rm -i ic_launcher.png
      else
          cp "${path}" "drawable-xxxhdpi/$path"
          convert "${path}" -resize 75% "drawable-xxhdpi/$path"
          convert "${path}" -resize 50% "drawable-xhdpi/$path"
          convert "${path}" -resize 38% "drawable-hdpi/$path"
          convert "${path}" -resize 25% "drawable-mdpi/$path"
          magick "drawable-xxxhdpi/$path" -quality 80 -define webp:lossless=true "drawable-xxxhdpi/${path%.*}.webp"
          magick "drawable-xxhdpi/$path" -quality 80 -define webp:lossless=true "drawable-xxhdpi/${path%.*}.webp"
          magick "drawable-xhdpi/$path" -quality 80 -define webp:lossless=true "drawable-xhdpi/${path%.*}.webp"
          magick "drawable-hdpi/$path" -quality 80 -define webp:lossless=true "drawable-hdpi/${path%.*}.webp"
          magick "drawable-mdpi/$path" -quality 80 -define webp:lossless=true "drawable-mdpi/${path%.*}.webp"
          rm -f "drawable-xxxhdpi/$path"
          rm -f "drawable-xxhdpi/$path"
          rm -f "drawable-xhdpi/$path"
          rm -f "drawable-hdpi/$path"
          rm -f "drawable-mdpi/$path"
      fi
    fi
  done

  for path in *.jpg; do
    if [ "$path" = "*.jpg" ]; then
      echo "Skip jpeg"
    else
      echo "Creating different drawable dimensions for: ${path}"
      cp "${path}" "drawable-xxxhdpi/$path"
      convert "${path}" -resize 75% "drawable-xxhdpi/$path"
      convert "${path}" -resize 50% "drawable-xhdpi/$path"
      convert "${path}" -resize 38% "drawable-hdpi/$path"
      convert "${path}" -resize 25% "drawable-mdpi/$path"
      magick "drawable-xxxhdpi/$path" -quality 80 -define webp:lossless=true "drawable-xxxhdpi/${path%.*}.webp"
      magick "drawable-xxhdpi/$path" -quality 80 -define webp:lossless=true "drawable-xxhdpi/${path%.*}.webp"
      magick "drawable-xhdpi/$path" -quality 80 -define webp:lossless=true "drawable-xhdpi/${path%.*}.webp"
      magick "drawable-hdpi/$path" -quality 80 -define webp:lossless=true "drawable-hdpi/${path%.*}.webp"
      magick "drawable-mdpi/$path" -quality 80 -define webp:lossless=true "drawable-mdpi/${path%.*}.webp"
      rm -f "drawable-xxxhdpi/$path"
      rm -f "drawable-xxhdpi/$path"
      rm -f "drawable-xhdpi/$path"
      rm -f "drawable-hdpi/$path"
      rm -f "drawable-mdpi/$path"
    fi
  done

popd || exit