Why can't the import com.google.android.gms.plus be resolved?

Question

I'm trying to integrate Google sign-in in my app but the import com.google.android.gms.plus says that the symbol plus can't be resolved, why? Is it because of the version I'm using?s

This is my app gradle:

apply plugin: 'com.android.application'


android {
compileSdkVersion 23
buildToolsVersion "23.0.1"

defaultConfig {
    applicationId "com.example.hadi.do2get"
    minSdkVersion 14
    targetSdkVersion 22
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
  }
 }

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.0'
compile 'com.android.support:design:23.1.0'
compile 'com.parse.bolts:bolts-android:1.+'
compile 'com.parse:parse-android:1.+'
compile 'com.google.android.gms:play-services-auth:8.4.0'
}

apply plugin: 'com.google.gms.google-services'

This is my project gradle:

buildscript {
repositories {
    jcenter()
}
dependencies {
    classpath 'com.android.tools.build:gradle:2.0.0-alpha3'
    classpath 'com.google.gms:google-services:2.0.0-alpha3'


 }
}

allprojects {
repositories {
    jcenter()
  }
}

task clean(type: Delete) {
delete rootProject.buildDir
}

I've tried many tutorials but none of them works. Google's own tutorial gives me errors too.

Answer 1

try doing

'com.google.android.gms:play-services-plus:8.4.0'