Script that allows renaming namespace of Android APK so you can install same application multiple times

rename-apk-namespace

#!/bin/bash
# author Marek Vavrecan (vavrecan@gmail.com)

# show usage
[ $# -eq 0 ] && { echo "Usage: $0 [apk path] [source namespace] [target namespace]"; exit 1; }

APK_PATH="$1"
NAMESPACE_FROM="$2"
NAMESPACE_TO="$3"

# escape . 
NAMESPACE_REPLACE=$(echo "s/$NAMESPACE_FROM/$NAMESPACE_TO/g" | sed -e 's/\./\\\./g')

# change to smalli support com.namespace to com/namespace
NAMESPACE_SLASHES_REPLACE=$(echo "s/$NAMESPACE_FROM/$NAMESPACE_TO/g" | sed -e 's/\./\\\//g')

if [ -f "apktool.jar" ];
then
else
   echo "Please get apktool from http://code.google.com/p/android-apktool/ to continue"
   exit 1;
fi

java -jar apktool.jar d -o out -f $APK_PATH

# replace tricks
find ./out -type f -exec sed -i $NAMESPACE_REPLACE {} \;
find ./out -type f -exec sed -i $NAMESPACE_SLASHES_REPLACE {} \;
find ./out -type f -exec sed -i 's/<string name="app_name">\(.*\)<\/string>/<string name="app_name">\1 Beta<\/string>/g' {} \;

mv out/smali/com/youcognize out/smali/com/youcognizebeta

# compile
java -jar apktool.jar b -o ./debug.apk -f ./out

# sign it again
jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore key.keystore ./debug.apk "password" -storepass "password" -keypass "password"

# cleanup
rm -R ./out

# to get key
# 	keytool -genkey -v -keystore key.keystore -alias password -keyalg RSA -keysize 2048 -validity 10000
# this might be needed to fix align, but was not needed so far 
# 	zipalign -v 4 debug.apk debug2.apk