keytool  -genkey  -v  -keystore  my-release-key.keystore  -alias  my-key-alias  -keyalg  RSA  -keysize  2048  -validity  10000

MYAPP_RELEASE_STORE_FILE=my-release-key.keystore
MYAPP_RELEASE_KEY_ALIAS=my-key-alias
MYAPP_RELEASE_STORE_PASSWORD=*****  // 替换成相应的密码
MYAPP_RELEASE_KEY_PASSWORD=*****  // 替换成相应的密码

...
android {
...
defaultConfig { ... }
    // 开始
signingConfigs {
    release {
        storeFile file(MYAPP_RELEASE_STORE_FILE)
        storePassword MYAPP_RELEASE_STORE_PASSWORD
        keyAlias MYAPP_RELEASE_KEY_ALIAS
        keyPassword MYAPP_RELEASE_KEY_PASSWORD
    }
}
    // 结束
buildTypes {
    release {
        ...
        signingConfig signingConfigs.release
    }
}
}
...
// 找到 def enableSeparateBuildPerCPUArchitecture = false
// 修改为 def enableSeparateBuildPerCPUArchitecture = true
// 找到 universalApk false
// 修改为 universalApk true
// 找到 def enableProguardInReleaseBuilds = false
// 修改为 def enableProguardInReleaseBuilds = true
// 最后清空缓存
// Android Studio Build > Clean Project

cd android && ./gradlew assembleRelease
// 包位置 android/app/build/outputs/apk/app-release.apk

cd android && ./gradlew installRelease