raex_app/scripts/android/afterBuild.js

const fs = require("fs");
const path = require("path");
module.exports = function (context) {
    const projectRoot = context.opts.projectRoot;

    const cordovaCommon = context.requireCordovaModule("cordova-common");
    const { ConfigParser } = cordovaCommon;
    const appConfig = new ConfigParser(path.resolve(projectRoot, "config.xml"));

    if (context.cmdLine.includes("--release")) {
        let version = appConfig.version();
        let channel = "default";
        let match = context.cmdLine.match(/channel=(.+?)(\s|$)/);
        if (match) {
            channel = match[1];
            console.log("channel: " + channel);
        }
        const projectRoot = context.opts.projectRoot;
        fs.copyFileSync(
            path.resolve(
                projectRoot,
                "platforms/android/app/build/outputs/apk/release/app-release.apk"
            ),
            path.resolve(
                projectRoot,
                `platforms/android/app/build/outputs/apk/channel/app-release-${version}-${channel}.apk`
            )
        );
    }
};