Multi tool use

Android - Firebase Database Quickstart Gradle Project Sync Failed

I am trying to build this project Firebase Database Quickstart, but I am facing error in App level build.gradle file.

build.gradle

Here is my error message

By searching google and stackoverflow i found some solution then i add this 'com.google.android.gms:play-services-auth:15.0.1' line in my gradle file so my error reduces from 6 to 3.

google

stackoverflow

'com.google.android.gms:play-services-auth:15.0.1'

Error message after adding this 'com.google.android.gms:play-services-auth:15.0.1'

'com.google.android.gms:play-services-auth:15.0.1'

Now i am unable to fix this error.

My Google Play services and Google Repository version is up to date and maven { url "https://maven.google.com" } is already added before in the project level build.gradle.

maven { url "https://maven.google.com" }

Here my App Level gradle file:

apply plugin: 'com.android.application'
check.dependsOn 'assembleDebugAndroidTest'

android {
compileSdkVersion 27

defaultConfig {
applicationId "com.google.firebase.quickstart.database"
minSdkVersion 16
targetSdkVersion 27
versionCode 1
versionName "1.0"
testInstrumentationRunner 'android.support.test.runner.AndroidJUnitRunner'
}

buildTypes {
release {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
signingConfig signingConfigs.debug
}
}
}

configurations.all {
resolutionStrategy.force 'com.android.support:support-annotations:27.1.1'
}

dependencies {
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support:recyclerview-v7:27.1.1'
implementation 'com.android.support:cardview-v7:27.1.1'
implementation 'com.android.support:design:27.1.1'

implementation 'com.firebaseui:firebase-ui-database:4.0.0'

implementation 'com.google.android.gms:play-services-auth:15.0.1'

implementation 'com.google.firebase:firebase-core:16.0.1'
implementation 'com.google.firebase:firebase-auth:16.0.2'
implementation 'com.google.firebase:firebase-database:16.0.1'

// Needed to fix a dependency conflict with FirebaseUI'
implementation 'android.arch.core:runtime:1.1.1'

// Needed to fix a dependency conflict with FirebaseUI'
implementation 'android.arch.core:runtime:1.1.1'

testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
androidTestImplementation 'com.android.support.test:rules:1.0.2'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
}

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


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