Replace immediate number in decompiled APK source file to constant variable reference.

convert.js

#!/usr/bin/env node

let fs = require('fs')
let { argv } = require('process')

let res_map = fs.readFileSync('R.map').toString().split('\n').slice(0,-1).map(v => v.slice(0,-1).split(' = ')).reduce((dict, v) => {
  dict[v[1]] = v[0]
  return dict
}, {})

let exp = RegExp('(.*)(' + Object.keys(res_map).join('|') + ')(.*)', 'g')

let src = fs.readFileSync(argv[2]).toString().replace(exp, (match, p1, p2, p3) => p1 + res_map[p2] + p3)

fs.writeFileSync(argv[2], src)