React Native - flash light app

... //

Build and Release an Android app

The best doc to read about it Flutter | Build and Release an Android app

---

Create an upload keystore

echo y | keytool -genkey -keystore ./upload-keystore.jks \
    -dname "CN=Francis Rodrigues, OU=Engineering, O=InfoTech, L=Garibaldi, ST=Rio Grande do Sul, C=BR" \
    -alias upload -keypass android  -storepass android \
    -keyalg RSA -keysize 2048 -validity 2000

Reference the keystore from the app

Create a file in ~/android/local.properties as below:

MYAPP_UPLOAD_STORE_PASSWORD=android
MYAPP_UPLOAD_KEY_PASSWORD=android
MYAPP_UPLOAD_KEY_ALIAS=upload
MYAPP_UPLOAD_STORE_FILE=./upload-keystore.jks

Configure signing in gradle

Configure gradle to use your upload key when building your app in release mode by editing the [project]/android/app/build.gradle file.

1. Add the keystore information from your properties file before the android block:

def keystoreProperties = new Properties()
def keystorePropertiesFile = rootProject.file('local.properties')
if (keystorePropertiesFile.exists()) {
    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
}

android {
    ...
}

2. Find the buildTypes block and add the following signing configuration info:

signingConfigs {
    debug: {
        ....
    }
    release {
        if (keystoreProperties['MYAPP_UPLOAD_STORE_FILE']) {
            storeFile file(keystoreProperties['MYAPP_UPLOAD_STORE_FILE'])
            storePassword keystoreProperties['MYAPP_UPLOAD_STORE_PASSWORD']
            keyAlias keystoreProperties['MYAPP_UPLOAD_KEY_ALIAS']
            keyPassword keystoreProperties['MYAPP_UPLOAD_KEY_PASSWORD']
        }
    }
}
buildTypes {
    debug: {
        ...
    }
    release {
        signingConfig signingConfigs.release
    }
}

Release builds of your app will now be signed automatically.

3. The generated app will be located at ./android/app/build/outputs/apk/release/app-release.apk

Install it by running adb install <path-to-release-apk>

Performing Streamed Install
Success