问题
I am desperately trying to integrate GA v4 in my Android app. And I followed the guide here https://developers.google.com/analytics/devguides/collection/android/v4/
And integrated Google Play Services lib as described, but it gives me
Could not find class 'com.google.android.gms.analytics.Tracker
But I can find classes and its namespaces in the project.
I can't figure out what's happening here.
回答1:
I followed also the instruction on Analytics for Android v4.
But additionally I had to update play services and build tools in the SDK manager. Then I had to add compile 'com.google.android.gms:play-services:8.4.0' in the app build.gradle (above of compile 'com.google.android.gms:play-services-analytics:8.4.0'. The Tracker class was still unknown (red underlined) but despite of that I pressed "Run" (install app) in Android Studio and only then analytics was recognized and could be used.
回答2:
I had the same problem and the reason was my Google Play services package was outdated.
Using Eclipse, I went into Window > Android SDK Manager, checked only Google Play services package (under "Extras" in the bottom), updated it and created a new lib project.
Then I followed the steps in tutorial below to create a new google play services lib project.
https://developer.android.com/google/play-services/setup.html
Hope it helps!
/Paulo
来源：https://stackoverflow.com/questions/25360884/google-analytics-v4-in-android-could-not-find-class-com-google-android-gms-ana