未解决的参考GoogleSignIn

Question

I'm getting "Unresolved reference" for GoogleSignIn

The current files set up:

settings.gradle

include ':app', ':signin:app'

project gradle:

buildscript {

ext{
    kotlin_version = '1.2.60'
    lifecycle_version = '1.1.1'
}

repositories {
    jcenter()
    google()
    mavenCentral()
    maven {
        url 'https://maven.fabric.io/public'
    }
}
dependencies {
    classpath 'com.android.tools.build:gradle:3.1.4'
    classpath 'com.google.gms:google-services:4.0.1'
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    classpath 'io.fabric.tools:gradle:1.25.4'

    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
}
}
allprojects {
repositories {
    jcenter()
    google()
    maven {
        url 'https://maven.google.com/'
    }
}
}

app gradle:

dependencies {
...
implementation 'com.google.android.gms:play-services-gcm:15.0.1'
...}

and finally import:

import com.google.android.gms.auth.api.signin.GoogleSignIn

I tried to rebuild Project, Refresh Gradle Projects and Invalidate caches and I still get Unresolved reference for GoogleSignIn. When I tried to change play-services-gcm: 15.0.1 ' to play-services-gcm: 16.0.0 ', which is the newest Google Account Login, I get an error: "Failed to resolve: com.google.android.gms:play-services-gcm:16.0.0". Installing repository and sync projects gives another error "Could not find dependency com.google.android.gms:play-services-gcm:16.0.0"

Gradle version 4.4 Android Plugin Version 3.1.4

Answer 1

You should not implement all google play services in your project for use only auth service

The size of the Apk file will increase, so replace the dependency as below

implementation 'com.google.android.gms:play-services-auth:16.0.0'

And it is advisable update google-services Plugin Version to 4.0.2