Automatically build and sign Android APK files for Ionic 2.0

build-android.sh

#!/bin/bash

# Author: Brad Bird
# Website: http://bradders.rocks
# Email: hello@bradders.rocks

# Instructions
# 0. Place this file in the root directory of your Ionic app
# 1. If you haven't made a keystore file go here https://developer.android.com/studio/publish/app-signing.html#signing-manually
# 2. Place your .keystore file in the root directory
# 3. Make sure you have access to "zipalign" and "apksigner" commands by typing them in the terminal
# 4. ????
# 5. PROFIT

# Set colours
RESTORE='\033[0m'
RED='\033[00;31m'
GREEN='\033[00;32m'
YELLOW='\033[00;33m'

# Set up some vars
# Can change these to suit your preferences
APK_DIR=platforms/android/build/outputs/apk/
KEYSTORE_DEFAULT=braddersrocks.keystore

# Check .keystore file exists
if [ ! -f ${KEYSTORE_DEFAULT} ]; then
    echo -e "${RED}ERROR${RESTORE} Keystore file not found!"
    exit
fi

# Enter version number for build.
read -p "What version is this build?: " APK_VERSION

# Check .keystore file exists
if [ -z ${APK_VERSION} ]; then
    echo -e "${RED}ERROR${RESTORE} You  must set a version number!"
    exit
fi

# Check if the release already exists
# If it does ask the user if they wish to rebuild it
if [ -f ${APK_DIR}android-release-${APK_VERSION}.apk ]; then
    echo -ne "${YELLOW}WARNING${RESTORE}: "
    read -p "A version already exists for ${APK_VERSION}. Do you want to overwrite it? (y/n): " CONFIRM_OVERWRITE

    # If nothing is entered assume it is a "y"
    if [ -z ${CONFIRM_OVERWRITE} ]; then
        CONFIRM_OVERWRITE="y"
    fi

    if [ ${CONFIRM_OVERWRITE} = "n" ]; then
        exit
    fi
fi

# Make Ionic release build for Android
ionic build android --release

# Align the .apk
zipalign -v -p 4 ${APK_DIR}android-release-unsigned.apk ${APK_DIR}android-release-unsigned-aligned.apk

# Sign the .apk with the version number provided earlier
apksigner sign --ks braddersrocks.keystore --out ${APK_DIR}android-release-${APK_VERSION}.apk ${APK_DIR}android-release-unsigned-aligned.apk

# Clear temporary unsigned/unaligned .apks
rm ${APK_DIR}android-release-unsigned.apk
rm ${APK_DIR}android-release-unsigned-aligned.apk

# Success message!
echo -e "${GREEN}SUCCESS${RESTORE}: Your signed Android release has been built"
echo -e "${GREEN}SUCCESS${RESTORE}: APK located at ${APK_DIR}android-release-${APK_VERSION}.apk"