Minimizing corona app to 2.8/3.6 MB

readme.md

Usage:

./minimize.sh -n test.apk For small APK without embedded resources for widgets. Minimal size is about 2.8 MB

./minimize.sh test.apk Just repackage it. Minimal size is about 3.9 MB

minimize.sh

#!/bin/bash -e

DELETE_RES=0

while test $# -gt 0; do
        case "$1" in
                -h|--help)
                        echo "minimize.sh - repackage APK for minimal size"
                        echo " "
                        echo "./minimize.sh [--no-res|-n] <input.apk>"
                        echo " "
                        echo "options:"
                        echo "-h, --help        show brief help"
                        echo "-n, --no-res        uses plugin.beta for output"
                        exit 0
                        ;;
                -n|--no-res)
                        DELETE_RES=1
                        shift
                        ;;
                *)
                        break
                        ;;
        esac
done

if [ ! -f "$1" ]; then
    echo "Must input APK! Run"  
    echo "./minimize.sh -h"
    echo "for more info"
    exit 0
fi


if [[ -z "${SDK_BUILD_TOOLS}" ]]; then
    SDK_BUILD_TOOLS=~/Library/Android/sdk/build-tools/$(ls -r ~/Library/Android/sdk/build-tools/ | head -n 1)
    # echo "Default build-tools: $SDK_BUILD_TOOLS"
fi

if [ ! -f "$SDK_BUILD_TOOLS/zipalign" ]; then
    echo "Cannot find Android SDK in ~/Library/Android/sdk/build-tools, default Android Studio location"
    echo "Set SDK_BUILD_TOOLS env to desired build tools location. For example:"
    echo "SDK_BUILD_TOOLS=~/Android/sdk/build-tools/26.0.2    ./minimize.sh -n myapk.apk"
    exit 0
fi




OUT=$(mktemp -d)

unzip -q "$1" -d "$OUT/out"
pushd "$OUT/out" > /dev/null

if [ $DELETE_RES == 1 ]; then
    rm -r res/raw
fi


zip -q -r ../zipped.apk  .
popd > /dev/null


RESULT=$(dirname "$1")/mini-$(basename "$1")

rm -f "$RESULT"

"$SDK_BUILD_TOOLS/zipalign" -z 4 "$OUT/zipped.apk"  "$OUT/aligned.apk"
"$SDK_BUILD_TOOLS/apksigner" sign --ks /Applications/Corona/Corona\ Simulator.app/Contents/Resources/debug.keystore --ks-pass pass:"android" --out="$RESULT" --min-sdk-version=19 "$OUT/aligned.apk"