Failed to resolve com google firebase firebase-core 9 0 0

Question

I get the following  error while upgrading a firebase project from old domain to new google firebase domain      Failed to resolve  com google firebase firebase-core 9 0 0   I followed the steps mentioned on the Firebase documentation  in the section Add Firebase to your Android Project  topic Available libraries   What are my options to resolve this error

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Go to Android SDK Manager and install the latest version of below two libraries   Google Play Services Google Repository

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Tried all the above  use the Firebase Assistant  It is the simplest way to solve this  First remove all the dependencies you added to the build gradle  using the manual method  and then in Android Studio    Click Tools  gt  Firebase to open the Assistant window    It really is as easy as that

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In my case  on top of adding google   in repositories for the project level gradle file  I had to also include it in the app level gradle file   repositories       mavenLocal       google       flatDir           dirs  libs

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If all the above methods are not working then change implementation  com google firebase firebase-core 12 0 0  to implementation  com google firebase firebase-core 10 0 0  in your app level build gradle file  This would surely work

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Update Aug 2017  As of version 11 2 0 Firebase and Google Play services dependencies are available via Google s Maven Repo   You no longer need to use the Android SDK manager to import these dependencies   In your root build gradle file add the repo   allprojects     repositories                  maven   url  https   maven google com            If you are using gradle 4 0 or higher you can replace maven   url  https   maven google com    with just google       The 9 0 0 version of Firebase was built using Google Play services 9 0 and is now available under the new packaging com google firebase    See Release Notes for Google Play services 9 0 https   developers google com android guides releases may 2016 - v90  New versions of packages Google Play Services  rev 30  and Google Repository  rev 26  were just released in the SDK manager so it s likely you just need to update     Downloading Google Play Services and Google Repository  From Android Studio    Click Tools   Android   SDK Manager  Click into the SDK Tools tab  Select and install Google Play Services  rev 30  and Google Repository  rev 26    See the image below  Sync and Build your project        From IntelliJ IDEA   As of April 2017  the latest versions of Google Play Services and Repository are listed below    Click Tools   Android   SDK Manager  Under the Packages panel  Look for the Extras  Select and install Google Play Services  rev 39  and Google Repository  rev 46   See the image below  Perform a gradle project sync and Build your project

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Following are the prerequisites if you want to add firebase to your project     For working with Firebase you should install Android Studio 1 5 or higher   Download the latest Google Play services SDK from through Android SDK Manager  The device should be running Android 2 3  Gingerbread  or newer  and Google Play services 9 2 0 or newer    I could only find out all this after hours of struggle   Source  Adding Firebase to your Android App

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If using command line tools  do  sdkmanager  extras google m2repository  sdkmanager  extras android m2repository

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Error  30  13  Failed to resolve  com google firebase firebase-auth 9 6 1   If you ever get this error and you are using Android studio 2 2 that comes with firebase component integrated in it which has libraries version 9 6 0 by default and you are adding the latest dependencies like 9 6 1    You might need to downgrade com google firebase firebase-auth 9 6 1 to com google firebase firebase-auth 9 6 0   Or check the library version of your pre-installed firebase and make sure it is of the same version with the new library you are trying to add or added to your project

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Need to Update  Android SDK   SDK Tools -  Support Repository -  Google Repository  After updating the Android SDK need to sync gradle build in Android studio

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Faced myself and seen several times in comments for similar questions - that even after installing  latest  Google Play Services and Google Repository still having the same issue   The thing is that they may be latest for your current revision of Android SDK Tools  but not that latest your app build requires   In such case make sure to install latest version of Android SDK Tools first  and probably Android SDK Platform-tools  both under Tools branch   Also please note you may need to go through this several times if you haven t updated for a long time  i e  install latest Android SDK Tools and Android SDK Platform-tools  then restart Android SDK Manager  then repeat   since the updates seem to be going through some critical mandatory milestones and you cannot install the very latest if you currently have the revision which is pretty  old

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dependencies       compile  com google android gms play-services-maps 11 8 0      compile  com google android gms play-services-auth 11 8 0      compile  com google android gms play-services-ads 11 8 0      compile  com google firebase firebase-storage 11 8 0     apply plugin   com google gms google-services       Top-level build file where you can add configuration options common to all sub-projects modules   buildscript       repositories             maven   url  https   maven fabric io public             jcenter           google             dependencies           classpath  com android tools build gradle 3 0 0          classpath  com google gms google-services 3 1 1               NOTE  Do not place your application dependencies here  they belong            in the individual module build gradle files          allprojects       repositories           jcenter           google

[android] Failed to resolve: com.google.firebase:firebase-core:9.0.0

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