Add Scripts to android/app/build.gradle to pick version code and version name from package.json

build.gradle

// Import JSON parser, place it at the top of the file
import groovy.json.JsonSlurper

// Read package.json and return `version` field
def getVersionFromNpm() {
    //  Read and parse package.json file from project root
    def inputFile = new File("$rootDir/../package.json")
    def packageJson = new JsonSlurper().parseText(inputFile.text)


    println ("Version Name: " +  packageJson["version"]);
    // Return the version, you can get any value this way
    return packageJson["version"]
}

// Convert version name to a version number
def getNumericVersionFromNpm() {

    def versionName =  getVersionFromNpm()
    def parts = versionName.split("\\.")


    int hotfix = parts[2] as int
    int minor = parts[1] as int
    int major = parts[0] as int

    def numericVersion =  major*100000 + minor*1000 + hotfix
    println('Version Code: ' + numericVersion)

    return numericVersion
}