Google Play services: How to handle devices that do not have Google Play?

Question

Google Play services is an Android library whose goal is to provide:

• OAuth 2.0 authentication
• Google+ sign-in
• Google+ +1 button
• various other goodies

If I were to use it (for instance because I want Google+ sign-in), what would happen to users whose device does not have Google Play? (Nook, Cyanogenmod, China Mobile, old devices, maybe Huawei?, etc)

QUESTION: Will my app become incompatible with such devices? Will it be displayed as compatible but then crash, or not work?
Is there a best practice to keep this in mind when using Google Play services?

Solution 1

GooglePlayServicesUtil.isGooglePlayServicesAvailable(android.content.Context)

is deprecated!

Use:

 GoogleApiAvailability api = GoogleApiAvailability.getInstance();
        int code = api.isGooglePlayServicesAvailable(activity);
        if (code == ConnectionResult.SUCCESS) {
           // Do Your Stuff Here
        } else {
           AlertDialog alertDialog =
                 new AlertDialog.Builder(activity, R.style.AppCompatAlertDialogStyle).setMessage(
                       "You need to download Google Play Services in order to use this part of the application")
                       .create();
           alertDialog.show();
        }

Solution 2

If the feature from Google Play Services is essential for your app there would be no way to get your App working.

You can check if the services are enabled from within your app with GooglePlayServicesUtil.isGooglePlayServicesAvailable(android.content.Context)
which returns ConnectionResult.SUCCESS if Play Services is available.

You can now try to convince the user to install it (if possible) or disable the feature that is using the service.

As the Google Play Services is not a feature declared in the manifest your app should install fine on any device but may crash later on if you are using the APIs without checking if they are available.

You can try the behaviour with the emulator. Just create an AVD without the Google APIs and put your App on it.