Failed to resolve: com.google.firebase:firebase-core:16.0.1

Question

I'm trying to add firebase cloud storage to my app. Below is the app build.gradle. But it says: Failed to resolve: com.google.firebase:firebase-core:16.0.1. Why? There is no firebase-core in the dependencies at all.

apply plugin: 'com.android.application'  android {     compileSdkVersion 27     defaultConfig {         applicationId "com.louise.udacity.mydict"         minSdkVersion 15         targetSdkVersion 27         versionCode 1         versionName "1.0"         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"     }     buildTypes {         release {             minifyEnabled false             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'         }     } }  dependencies {     implementation fileTree(dir: 'libs', include: ['*.jar'])     implementation 'com.android.support:appcompat-v7:27.1.1'     implementation 'com.android.support.constraint:constraint-layout:1.1.0'     implementation 'com.google.firebase:firebase-storage:16.0.1'     implementation 'com.google.firebase:firebase-auth:16.0.1'     testImplementation 'junit:junit:4.12'     androidTestImplementation 'com.android.support.test:runner:1.0.2'     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'      implementation 'com.google.cloud:google-cloud-storage:1.31.0'     implementation 'com.firebase:firebase-jobdispatcher:0.8.5' }  apply plugin: 'com.google.gms.google-services' 

Answer 1

From the docs:-

Your app gradle file now has to explicitly list com.google.firebase:firebase-core as a dependency for Firebase services to work as expected.

Add:

 implementation 'com.google.firebase:firebase-core:16.0.1' 

and in top level gradle file use the latest version of google play services:

classpath 'com.google.gms:google-services:4.0.2' 

https://firebase.google.com/support/release-notes/android

https://bintray.com/android/android-tools/com.google.gms.google-services

Note:

You need to add the google() repo in the top level gradle file, as specified in the firebase docs and also it should be before jcenter():

 buildscript {   repositories {           google()           jcenter()       }    dependencies {   classpath 'com.android.tools.build:gradle:3.1.3'   classpath 'com.google.gms:google-services:4.0.2'    } }  allprojects {      repositories {               google()              jcenter()   } }  task clean(type: Delete) {   delete rootProject.buildDir  } 

https://firebase.google.com/docs/android/setup

Answer 2

As @Peter Haddad mentioned above,

To fix this issue I followed Google firebase integration guidelines and did the following changes in my app/build.gradle and project/build.gradle

Follow below mentioned link if you have any doubts

https://firebase.google.com/docs/android/setup

changes in app/build.gradle

implementation 'com.google.android.gms:play-services-base:15.0.2'  implementation "com.google.firebase:firebase-core:16.0.1"  implementation "com.google.firebase:firebase-messaging:17.4.0"

Changes in Project/build.gradle

repositories {            google()          jcenter()          mavenCentral()          maven {              url 'https://maven.fabric.io/public'          }      }      dependencies {          classpath 'com.android.tools.build:gradle:3.1.4'          classpath 'com.google.gms:google-services:4.2.0'// // google-services plugin it should be latest if you are using firebase version 16.0 +               }      allprojects {      repositories {           google()// add it to top instead of bottom or somewhere in middle          mavenLocal()          mavenCentral()          maven {              url 'https://maven.google.com'          }                   jcenter()          maven {              // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm              url "$rootDir/../node_modules/react-native/android"          }                }  }