このように怒られ,
Execution failed for task ':app:processDebugGoogleServices'. Please fix the version conflict either by updating the version of the google-services plugin (information about the latest version is available at https://bintray.com/android/android-tools/com.google.gms.google-services/) or updating the version of com.google.android.gms to 8.3.0.
build.gradle を見ると「8.4.0」
apply plugin: 'com.google.gms.google-services' |
compile 'com.google.android.gms:play-services-gcm:8.4.0' |
こんな答えだと.
android - Version conflict updating to 8.4.0 - Stack Overflow
compile 'com.google.android.gms:play-services-gcm:8.4.0' |
apply plugin: 'com.google.gms.google-services' |
まとめ
build.gradle (project-top)
classpath 'com.android.tools.build:gradle:2.0.0-alpha3' |
classpath 'com.google.gms:google-services:2.0.0-alpha3' |
// NOTE: Do not place your application dependencies here; they belong |
// in the individual module build.gradle files |
build.gradle (app-module)
compile fileTree(dir: 'libs', include: ['*.jar']) |
compile 'com.google.android.gms:play-services:8.4.0' |
apply plugin: 'com.google.gms.google-services' |
おつかれさまでした.

google-services/build.gradle