android - 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?

Answer 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();
        }