pubspec.yaml

dependencies:
  flutter:
    sdkflutter
  firebase_core^0.5.1
  firebase_auth^0.18.2
  battery^1.0.7


app 경로의 build.gradle

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.4.21"
    implementation platform('com.google.firebase:firebase-bom:26.1.1')
    implementation 'com.google.firebase:firebase-analytics:18.0.0'


app/android 경로의 build.gradle

    dependencies {
        classpath 'com.android.tools.build:gradle:4.0.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.3.4'