How to update Google Play Services to 9.8.7

问题

I am trying to implement firebase in android project but always getting:
Google Play services out of date. Requires 9877000 but found 9683480
My graddle project/app files look like:

...
compile 'com.google.firebase:firebase-core:9.8.0'
    compile 'com.google.firebase:firebase-database:9.8.0'
    compile 'com.google.firebase:firebase-auth:9.8.0'

}

apply plugin: 'com.google.gms.google-services'

and

dependencies {
        classpath 'com.android.tools.build:gradle:2.2.2'
        classpath 'com.google.gms:google-services:3.0.0'

I created Nexus S emulator with API 23 and Target: Android 6.0 (Google APIs) x86_64

Inside emulator Google App Services version is 9.6.83

What should I do to be able to run firebase as don't know what to install or update anymore :/
I am new to android and don't know if I am missing something small.

回答1:

The updated Android tools (which contains the Android Emulator system image) isn't out yet. Only once that is out will your emulators have Google Play Services 9.8, which is a prerequisite for Firebase SDK 9.8.

If you want to test on an emulator, you will have to downgrade your app to Firebase SDK 9.6 for the moment.

If you deploy to a physical device, it'll likely already have the latest version.

回答2:

A possible walkthrough would be to downgrade the emulator's API version (e.g. from 23 to 20) by creating a new emulator (Tools -> Android -> AVD Manager -> Create New Virtual Device. On the second screen, select your prefered (e.g. 20) API version.

来源：https://stackoverflow.com/questions/40249454/how-to-update-google-play-services-to-9-8-7