How to create Multiple Environments in React Native Android

Hi Guys, In this article, we are going to learn about How to create Multiple Environments in React Native Android. Generally, developers need to create multiple environments for their project to share the build with the Internal testing team or to make App live on the play store. to do this developers need to create productFlavors such as dev for development purposes and prod for the production environment when the developer wants to create signed APK. so in this article we will learn complete Gradle configuration to use App for testing as well as production with signed APK. let’s understand step by step.

1. Create secrets.properties file

Consider you have completed one milestone or one scope of work. and you want to share build with your testing team or you want to share build on open or close testing in the play store. the first step is to create jks file for the project using Android studio. this file is unique and one time so keep it safe in multiple locations in your disk.

To create jks file goto Build-> Generate Signed Bundle

Select Android App Bundle

Click on create new. make sure passwords are noted somewhere or enter the same password for Key store & Alias.

How to create Multiple Environments in React Native Android

Create secrets.properties file in ProjectName/app/secrets.properties

How to create Multiple Environments in React Native Android

Add jks file path & passwords in it.

RELEASE_STORE_FILE=/home/Saurabh/Android_Projects_new/project-workspace/IMP/DemoProject.jks
RELEASE_STORE_PASSWORD=Demo@123
RELEASE_KEY_ALIAS=Demo
RELEASE_KEY_PASSWORD=Demo@123

2. Create multiple environments in gradle

Import secrets.properties file in Gradle as follows

def secretsFile = file('secrets.properties')
def secrets = new Properties()
if (secretsFile.exists()) {
    secrets.load(new FileInputStream(secretsFile))
}

Use secretFile in signingConfigs release section

  signingConfigs {
        debug {
            storeFile file('debug.keystore')
            storePassword 'android'
            keyAlias 'androiddebugkey'
            keyPassword 'android'
        }
        release {
            if (secrets.getProperty('RELEASE_STORE_FILE')) {
                storeFile file(secrets.getProperty('RELEASE_STORE_FILE'))
                storePassword secrets.getProperty('RELEASE_STORE_PASSWORD')
                keyAlias secrets.getProperty('RELEASE_KEY_ALIAS')
                keyPassword secrets.getProperty('RELEASE_KEY_PASSWORD')
            }
        }
    }

Finally, add the following flavors code to it.

 // Specifies one flavor dimension.
    flavorDimensions "version"

    productFlavors {
        prod {
            applicationId 'com.saurabh.demoApp'
            versionCode 2
            versionName '0.0.1'
        }
        dev {
            applicationId 'com.saurabh.dempApp'
            versionCode 1
            versionName '0.0.38'
        }
    }

3. Complete code of Gradle file

apply plugin: "com.android.application"
apply plugin: 'com.google.gms.google-services'

def secretsFile = file('secrets.properties')
def secrets = new Properties()
if (secretsFile.exists()) {
    secrets.load(new FileInputStream(secretsFile))
}


import com.android.build.OutputFile

/**
 * The react.gradle file registers a task for each build variant (e.g. bundleDebugJsAndAssets
 * and bundleReleaseJsAndAssets).
 * These basically call `react-native bundle` with the correct arguments during the Android build
 * cycle. By default, bundleDebugJsAndAssets is skipped, as in debug/dev mode we prefer to load the
 * bundle directly from the development server. Below you can see all the possible configurations
 * and their defaults. If you decide to add a configuration block, make sure to add it before the
 * `apply from: "../../node_modules/react-native/react.gradle"` line.
 *
 * project.ext.react = [
 *   // the name of the generated asset file containing your JS bundle
 *   bundleAssetName: "index.android.bundle",
 *
 *   // the entry file for bundle generation
 *   entryFile: "index.android.js",
 *
 *   // https://facebook.github.io/react-native/docs/performance#enable-the-ram-format
 *   bundleCommand: "ram-bundle",
 *
 *   // whether to bundle JS and assets in debug mode
 *   bundleInDebug: false,
 *
 *   // whether to bundle JS and assets in release mode
 *   bundleInRelease: true,
 *
 *   // whether to bundle JS and assets in another build variant (if configured).
 *   // See http://tools.android.com/tech-docs/new-build-system/user-guide#TOC-Build-Variants
 *   // The configuration property can be in the following formats
 *   //         'bundleIn${productFlavor}${buildType}'
 *   //         'bundleIn${buildType}'
 *   // bundleInFreeDebug: true,
 *   // bundleInPaidRelease: true,
 *   // bundleInBeta: true,
 *
 *   // whether to disable dev mode in custom build variants (by default only disabled in release)
 *   // for example: to disable dev mode in the staging build type (if configured)
 *   devDisabledInStaging: true,
 *   // The configuration property can be in the following formats
 *   //         'devDisabledIn${productFlavor}${buildType}'
 *   //         'devDisabledIn${buildType}'
 *
 *   // the root of your project, i.e. where "package.json" lives
 *   root: "../../",
 *
 *   // where to put the JS bundle asset in debug mode
 *   jsBundleDirDebug: "$buildDir/intermediates/assets/debug",
 *
 *   // where to put the JS bundle asset in release mode
 *   jsBundleDirRelease: "$buildDir/intermediates/assets/release",
 *
 *   // where to put drawable resources / React Native assets, e.g. the ones you use via
 *   // require('./image.png')), in debug mode
 *   resourcesDirDebug: "$buildDir/intermediates/res/merged/debug",
 *
 *   // where to put drawable resources / React Native assets, e.g. the ones you use via
 *   // require('./image.png')), in release mode
 *   resourcesDirRelease: "$buildDir/intermediates/res/merged/release",
 *
 *   // by default the gradle tasks are skipped if none of the JS files or assets change; this means
 *   // that we don't look at files in android/ or ios/ to determine whether the tasks are up to
 *   // date; if you have any other folders that you want to ignore for performance reasons (gradle
 *   // indexes the entire tree), add them here. Alternatively, if you have JS files in android/
 *   // for example, you might want to remove it from here.
 *   inputExcludes: ["android/**", "ios/**"],
 *
 *   // override which node gets called and with what additional arguments
 *   nodeExecutableAndArgs: ["node"],
 *
 *   // supply additional arguments to the packager
 *   extraPackagerArgs: []
 * ]
 */

project.ext.react = [
        entryFile   : "index.js",
        enableHermes: false,  // clean and rebuild if changing
]

apply from: "../../node_modules/react-native/react.gradle"

/**
 * Set this to true to create two separate APKs instead of one:
 *   - An APK that only works on ARM devices
 *   - An APK that only works on x86 devices
 * The advantage is the size of the APK is reduced by about 4MB.
 * Upload all the APKs to the Play Store and people will download
 * the correct one based on the CPU architecture of their device.
 */
def enableSeparateBuildPerCPUArchitecture = false

/**
 * Run Proguard to shrink the Java bytecode in release builds.
 */
def enableProguardInReleaseBuilds = false

/**
 * The preferred build flavor of JavaScriptCore.
 *
 * For example, to use the international variant, you can use:
 * `def jscFlavor = 'org.webkit:android-jsc-intl:+'`
 *
 * The international variant includes ICU i18n library and necessary data
 * allowing to use e.g. `Date.toLocaleString` and `String.localeCompare` that
 * give correct results when using with locales other than en-US.  Note that
 * this variant is about 6MiB larger per architecture than default.
 */
def jscFlavor = 'org.webkit:android-jsc:+'

/**
 * Whether to enable the Hermes VM.
 *
 * This should be set on project.ext.react and mirrored here.  If it is not set
 * on project.ext.react, JavaScript will not be compiled to Hermes Bytecode
 * and the benefits of using Hermes will therefore be sharply reduced.
 */
def enableHermes = project.ext.react.get("enableHermes", false);

android {
    compileSdkVersion rootProject.ext.compileSdkVersion

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    defaultConfig {
        applicationId "com.saurabh.demoApp"
        minSdkVersion rootProject.ext.minSdkVersion
        targetSdkVersion rootProject.ext.targetSdkVersion
        //versionCode 1
       // versionName "0.0.38"
        // Enabling multidex support.
        multiDexEnabled true

    }
    splits {
        abi {
            reset()
            enable enableSeparateBuildPerCPUArchitecture
            universalApk false  // If true, also generate a universal APK
            include "armeabi-v7a", "x86", "arm64-v8a", "x86_64"
        }
    }
    signingConfigs {
        debug {
            storeFile file('debug.keystore')
            storePassword 'android'
            keyAlias 'androiddebugkey'
            keyPassword 'android'
        }
        release {
            if (secrets.getProperty('RELEASE_STORE_FILE')) {
                storeFile file(secrets.getProperty('RELEASE_STORE_FILE'))
                storePassword secrets.getProperty('RELEASE_STORE_PASSWORD')
                keyAlias secrets.getProperty('RELEASE_KEY_ALIAS')
                keyPassword secrets.getProperty('RELEASE_KEY_PASSWORD')
            }
        }
    }
    buildTypes {
        debug {
            signingConfig signingConfigs.debug
        }
        release {
            // Caution! In production, you need to generate your own keystore file.
            // see https://facebook.github.io/react-native/docs/signed-apk-android.
            signingConfig signingConfigs.debug
            minifyEnabled enableProguardInReleaseBuilds
            proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
        }
    }

    // Specifies one flavor dimension.
    flavorDimensions "version"

    productFlavors {
        prod {
            applicationId 'com.saurabh.demoApp'
            versionCode 2
            versionName '0.0.1'


        }
        dev {
            applicationId 'com.saurabh.demoApp'
            versionCode 1
            versionName '0.0.38'

        }


    }


    // applicationVariants are e.g. debug, release
    applicationVariants.all { variant ->
        variant.outputs.each { output ->
            // For each separate APK per architecture, set a unique version code as described here:
            // https://developer.android.com/studio/build/configure-apk-splits.html
            def versionCodes = ["armeabi-v7a": 1, "x86": 2, "arm64-v8a": 3, "x86_64": 4]
            def abi = output.getFilter(OutputFile.ABI)
            if (abi != null) {  // null for the universal-debug, universal-release variants
                output.versionCodeOverride =
                        versionCodes.get(abi) * 1048576 + defaultConfig.versionCode
            }

        }
    }
}

dependencies {
    implementation project(':rn-fetch-blob')
    implementation project(':@react-native-firebase_analytics')
    implementation project(':@react-native-firebase_remote-config')
    implementation 'androidx.multidex:multidex:2.0.1'
    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0-alpha03'
    implementation project(':react-native-fs')
    implementation project(':@react-native-community_netinfo')
    implementation project(':react-native-text-input-mask')
    implementation project(':react-native-video')
    implementation project(':react-native-biometrics')
    implementation project(':react-native-touch-id')
    implementation project(':react-native-push-notification')
    implementation project(':react-native-version-number')
    implementation project(':react-native-document-picker')
    implementation project(':react-native-image-crop-picker')
    implementation project(':react-native-datetimepicker')
    implementation project(':@react-native-community_async-storage')
    implementation project(':@react-native-firebase_app')
    implementation project(':react-native-restart')
    implementation project(':react-native-localization')
    implementation project(':react-native-fast-image')
    implementation project(':react-native-linear-gradient')
    implementation project(':react-native-reanimated')
    implementation project(':react-native-gesture-handler')
    implementation project(':react-native-webview')
    implementation project(':react-native-material-kit')
    implementation project(':react-native-vector-icons')
    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation "com.facebook.react:react-native:+"  // From node_modules
    // Firebase dependencies
    implementation "com.google.android.gms:play-services-base:17.6.0"
    // implementation 'com.google.firebase:firebase-config:17.0.0'
    implementation "com.google.firebase:firebase-core:16.0.9"
    implementation 'com.google.firebase:firebase-analytics:17.2.0'
    implementation "com.google.firebase:firebase-messaging:20.1.0"
    implementation 'com.android.support:multidex:1.0.3'

    if (enableHermes) {
        def hermesPath = "../../node_modules/hermes-engine/android/";
        debugImplementation files(hermesPath + "hermes-debug.aar")
        releaseImplementation files(hermesPath + "hermes-release.aar")
    } else {
        implementation jscFlavor
    }
}

// Run this once to be able to run the application with BUCK
// puts all compile dependencies into folder libs for BUCK to use
task copyDownloadableDepsToLibs(type: Copy) {
    from configurations.compile
    into 'libs'
}

apply plugin: 'com.google.gms.google-services'
apply from: file("../../node_modules/@react-native-community/cli-platform-android/native_modules.gradle"); applyNativeModulesAppBuildGradle(project)

After completing these steps you will see two different environments in your project Build Variants section one is for development purposes & the other is for production purposes you can upload prodRelease variant on play store.

If you use same Gradle configuration describe above then you will see four variants:

  1. devDebug  (Use for development)
  2. devRelease  (Use to share with the testing team)
  3. prodDebug  (Use to share with the testing team)
  4. prodRelease  (Use for only production purpose on play store with signed APK)

This is How you can create Multiple Environments in React Native Android.
Thank you 🙂

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