firebase cloud message package 다운로드 [https://pub.dev/packages/firebase_messaging](https://pub.dev/packages/firebase_messaging) [project]/android/build.gradle 수정 dependencies { // Example existing classpath classpath 'com.android.tools.build:gradle:3.5.3' // Add the google services classpath classpath 'com.google.gms:google-services:4.3.2' } [project]/android/app/build.gradle 수정 /..
