AndroidでFireBaseを11.0.4から12.0.1に更新するとエラー

Question

Android Oreoで通知アイコンが真っ白になるという現象が発生し、それを解決するために
Firebaseを12にすれば良いという記事を見ました。
参考：https://kwmt27.net/2018/04/21/push-notification-for-android-oreo/

そのために
以下のbuild.gradleの★の部分を11.0.4から12.0.1に書き換えましたが、上部画像のようにエラーとなりました。

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.3.1'
    compile 'com.android.support:design:25.3.1'
    compile 'com.google.firebase:firebase-core:12.0.1' 　★
    compile 'com.google.firebase:firebase-messaging:12.0.1'　★
    compile 'com.google.firebase:firebase-analytics:12.0.1'　★
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    testCompile 'junit:junit:4.12'
    compile 'se.emilsjolander:StickyScrollViewItems:1.1.0'
    compile 'com.fasterxml.jackson.core:jackson-databind:2.3.4'
    compile 'org.apmem.tools:layouts:1.10'
    compile 'com.google.android.gms:play-services:12.0.1'
    compile 'com.google.code.gson:gson:2.2.4'
    compile 'com.android.support:multidex:1.0.0'
    compile 'com.google.firebase:firebase-appindexing:12.0.1'　★
}

Show Log in Exploterをクリックし、idea.logを見てもエラーのようなものが見つからないのですが、何が原因なのでしょうか。
▼idea.log

2018-06-08 11:36:39,264 [6003201]   INFO - e.project.sync.GradleSyncState - Started sync with Gradle for project 'job'. 
2018-06-08 11:36:39,281 [6003218]   INFO - s.plugins.gradle.GradleManager - Instructing gradle to use java from C:/Program Files/Android/Android Studio/jre 
2018-06-08 11:36:39,286 [6003223]   INFO - s.plugins.gradle.GradleManager - Instructing gradle to use java from C:/Program Files/Android/Android Studio/jre 
2018-06-08 11:36:39,311 [6003248]   INFO - xecution.GradleExecutionHelper - Passing command-line args to Gradle Tooling API: [-Djava.awt.headless=true, -Pandroid.injected.build.model.only=true, -Pandroid.injected.build.model.only.advanced=true, -Pandroid.injected.invoked.from.ide=true, --init-script, C:\Users\userxxx\AppData\Local\Temp\asLocalRepo317.gradle, --init-script, C:\Users\userxxx\AppData\Local\Temp\ijinit.gradle] 
2018-06-08 11:36:44,383 [6008320]   INFO - ule.android.SdkModuleSetupStep - Set Android SDK 'Android API 25 Platform' (C:\Users\userxxx\AppData\Local\Android\Sdk) to module 'app' 
2018-06-08 11:36:44,432 [6008369]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\add-ons\addon-google_apis-google-24\package.xml 
2018-06-08 11:36:44,439 [6008376]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\build-tools\25.0.2\package.xml 
2018-06-08 11:36:44,445 [6008382]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\build-tools\25.0.3\package.xml 
2018-06-08 11:36:44,451 [6008388]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\build-tools\26.0.1\package.xml 
2018-06-08 11:36:44,455 [6008392]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\cmake\3.6.4111459\package.xml 
2018-06-08 11:36:44,460 [6008397]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\docs\package.xml 
2018-06-08 11:36:44,467 [6008404]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\emulator\package.xml 
2018-06-08 11:36:44,472 [6008409]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\extras\android\m2repository\package.xml 
2018-06-08 11:36:44,478 [6008415]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\extras\google\google_play_services\package.xml 
2018-06-08 11:36:44,484 [6008421]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\extras\google\m2repository\package.xml 
2018-06-08 11:36:44,490 [6008427]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\extras\intel\Hardware_Accelerated_Execution_Manager\package.xml 
2018-06-08 11:36:44,493 [6008430]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\extras\m2repository\com\android\support\constraint\constraint-layout-solver\1.0.2\package.xml 
2018-06-08 11:36:44,498 [6008435]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\extras\m2repository\com\android\support\constraint\constraint-layout\1.0.2\package.xml 
2018-06-08 11:36:44,502 [6008439]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\lldb\2.3\package.xml 
2018-06-08 11:36:44,508 [6008445]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\ndk-bundle\package.xml 
2018-06-08 11:36:44,512 [6008449]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\patcher\v4\package.xml 
2018-06-08 11:36:44,516 [6008453]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\platform-tools\package.xml 
2018-06-08 11:36:44,519 [6008456]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\platforms\android-21\package.xml 
2018-06-08 11:36:44,522 [6008459]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\platforms\android-23\package.xml 
2018-06-08 11:36:44,526 [6008463]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\platforms\android-24\package.xml 
2018-06-08 11:36:44,530 [6008467]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\platforms\android-25\package.xml 
2018-06-08 11:36:44,533 [6008470]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\sources\android-25\package.xml 
2018-06-08 11:36:44,536 [6008473]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\system-images\android-24\google_apis_playstore\x86\package.xml 
2018-06-08 11:36:44,540 [6008477]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\system-images\android-25\google_apis\x86\package.xml 
2018-06-08 11:36:44,544 [6008481]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\system-images\android-25\google_apis\x86_64\package.xml 
2018-06-08 11:36:44,547 [6008484]   INFO - s.RepoProgressIndicatorAdapter - Parsing C:\Users\userxxx\AppData\Local\Android\Sdk\tools\package.xml 
2018-06-08 11:36:44,647 [6008584]   INFO - pl.ProjectRootManagerComponent - project roots have changed 
2018-06-08 11:36:44,683 [6008620]   INFO - pl.ProjectRootManagerComponent - project roots have changed 
2018-06-08 11:36:44,710 [6008647]   INFO - pl.ProjectRootManagerComponent - project roots have changed 
2018-06-08 11:36:44,723 [6008660]   INFO - e.project.sync.GradleSyncState - Sync with Gradle successful for project 'job'. 
2018-06-08 11:36:44,939 [6008876]   INFO - .diagnostic.PerformanceWatcher - Pushing properties took 1ms; general responsiveness: ok; EDT responsiveness: ok 
2018-06-08 11:36:44,974 [6008911]   INFO - .diagnostic.PerformanceWatcher - Indexable file iteration took 35ms; general responsiveness: ok; EDT responsiveness: ok 
2018-06-08 11:36:45,005 [6008942]   INFO -       #com.jetbrains.cidr.lang - Clearing symbols finished in 0 s. 
2018-06-08 11:36:45,007 [6008944]   INFO -       #com.jetbrains.cidr.lang - Loading symbols finished in 0 s. 
2018-06-08 11:36:45,008 [6008945]   INFO -       #com.jetbrains.cidr.lang - Building symbols finished in 0 s. 
2018-06-08 11:36:45,008 [6008945]   INFO -       #com.jetbrains.cidr.lang - Saving symbols finished in 0 s. 

◆環境
Windows 10
Android Studio 2.3.3
min sdk version 21
target sdk version 25
compile sdk version 25

Answer 1

build.gradle (Project) に

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

のように、GoogleのMavenリポジトリーのURLが記述されているでしょうか？

また、12.0.1も少し古いようで、
https://firebase.google.com/docs/android/setup
を参考にして新しいバージョンにした方がいいかもしれません（新しいものにしたことによって新たなバグに遭遇する可能性もあるので、新しくすればいいというものでもないが）。

上記サイトは、表示言語をEnglishにしてください。日本語だと表示される内容が古いです。Googleのドキュメントは「日本語だと情報が古い」ということがしばしばあるので、注意が必要です。

Comments

[yrema]

解決しました。ありがとうございます！