Remove unused resources (drawables and layouts) from an Android project.

remove-unused-resources.sh

remove_unused_resources() {
  TAG=$1 # Just for logging
  RESOURCE_PATH=$2
  EXTENSION=$3

  echo
  echo $TAG
  for file in $RESOURCE_PATH*/*.$EXTENSION
    do
      # strip the extension
      bname=`basename $file .$EXTENSION`
      bname=`basename $bname .9` # hack for *.9.png and *.png
      # Check if the resource is referenced anywhere
      git grep -c $bname > /dev/null
      # If the resource isn't referenced, remove it
      if [ $? -eq 1 ]
      then
        echo "$file ($bname)"
        git rm $file
      fi
    done
}

remove_unused_resources "drawable xml" src/main/res/drawable xml
remove_unused_resources "drawable png" src/main/res/drawable png
remove_unused_resources "layout" src/main/res/layout xml
remove_unused_resources "menu" src/main/res/menu xml
remove_unused_resources "anim" src/main/res/anim xml
remove_unused_resources "xml" src/main/res/anim xml