Failed to resolve com.google.android.gms play-services-auth:11.4.0

问题:

I am trying to write code for Android FirebaseUI ― Auth in my android project but from last two days, I am getting errors in my current code and don't know how to fix it. trying hard but nothing happened in the right way.

here is my build.gradle(project:FriendlyChat)

// Top-level build file where you can add configuration options common to all sub-projects/modules.  buildscript {     repositories {         jcenter()         mavenLocal()     }     dependencies {         classpath 'com.android.tools.build:gradle:2.2.2'          // NOTE: Do not place your application dependencies here; they belong         // in the individual module build.gradle files         classpath 'com.google.gms:google-services:3.0.0'     } }  allprojects {     repositories {         jcenter()         mavenLocal()     } }  task clean(type: Delete) {     delete rootProject.buildDir } 

here is my build.gradle(Module:app)

apply plugin: 'com.android.application' apply plugin: 'com.google.gms.google-services'  repositories {     mavenLocal()     flatDir {         dirs 'libs'     } }  android {     compileSdkVersion 24     buildToolsVersion "24.0.1"      defaultConfig {         applicationId "com.google.firebase.udacity.friendlychat"         minSdkVersion 16         targetSdkVersion 24         versionCode 1         versionName "1.0"     }     buildTypes {         release {             minifyEnabled false             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'         }     }     packagingOptions {         exclude 'META-INF/LICENSE'         exclude 'META-INF/LICENSE-FIREBASE.txt'         exclude 'META-INF/NOTICE'     } }  dependencies {     compile fileTree(dir: 'libs', include: ['*.jar'])      // Displaying images     compile 'com.android.support:design:24.2.1'     compile 'com.android.support:appcompat-v7:24.2.1'     compile 'com.github.bumptech.glide:glide:3.6.1'     compile 'com.google.firebase:firebase-database:11.0.4'     compile 'com.google.firebase:firebase-auth:11.0.4'    compile 'com.google.android.gms:play-services-auth:11.4.0'      testCompile 'junit:junit:4.12' } 

回答1:

Failed to resolve com.google.android.gms play-services-auth:11.4.0 .

Add maven { url "https://maven.google.com" } to your root level build.gradle file

allprojects {     repositories {         jcenter()         maven {             url "https://maven.google.com"         }     } } 

This maven repo is required starting from 11.2.0.

Also pay attention since you are using different version. Use the same version.

compile 'com.google.firebase:firebase-database:11.0.4' compile 'com.google.firebase:firebase-auth:11.0.4' compile 'com.google.android.gms:play-services-auth:11.4.0' 

回答2:

Add google() repository to your "build.gradle" file. This gradle method is equivalent to maven { url "https://maven.google.com" }.

repositories {     jcenter()     google() } 

回答3:

add this in your project level gradle file

allprojects {     repositories {         jcenter()         maven {             url "https://maven.google.com"         }     } } 

回答4:

This error means that google play services 11.4.0 is not installed in your android studio.
To fix this you need to change the version of the dependency to what is installed in your android studio.
For this go to : Project Structure -> Project Settings -> Modules -> Dependencies
Here click on the + sign. Find your desired dependency.You can check its version here.You can also add the dependency to your project from here.

It is always recommended that you update your google play services SDK tools from SDK manager and use the newest version.

回答5:

Change your top level dependency gradle setting

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {     repositories {         jcenter()         mavenLocal()     }     dependencies {         classpath 'com.android.tools.build:gradle:2.3.2'          // NOTE: Do not place your application dependencies here; they belong         // in the individual module build.gradle files         classpath 'com.google.gms:google-services:3.0.0'     } }  allprojects {     repositories {         jcenter()         mavenLocal()     } }  task clean(type: Delete) {     delete rootProject.buildDir } 

回答6:

I faced the same problem here today and just had to disable gradle offline work option on "File >> Settings >> Build, Execution, Deployment >> Gradle >> Offline work".

回答7:

From Firebase doc:

// ADD THIS AT THE BOTTOM apply plugin: 'com.google.gms.google-services' 

Bottom position of this line not top (below apply plugin: 'com.android.application').

回答8:

In my case I already had the google() repository installed. I was unable to resolve the dependency until I rebooted Android Studio. My guess is it couldn't resolve due to some lingering proxy config from when I had Charles open earlier in the day.

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