GooglePlayServicesUtil vs GoogleApiAvailability

Question

I am trying to use Google Play Service in my Android app. As Google document says, we need to check if the Google API is available before using it. I have searched some way

Answer 1

Check the device to make sure it has the Google Play Services APK. If it doesn't, display a dialog that allows users to download the APK from the Google Play Store or enable it in the device's system settings.

public static boolean checkPlayServices(Activity activity) {
    final int PLAY_SERVICES_RESOLUTION_REQUEST = 9000;
    GoogleApiAvailability apiAvailability = GoogleApiAvailability.getInstance();
    int resultCode = apiAvailability.isGooglePlayServicesAvailable(activity);
    if (resultCode != ConnectionResult.SUCCESS) {
        if (apiAvailability.isUserResolvableError(resultCode)) {
            apiAvailability.getErrorDialog(activity, resultCode, PLAY_SERVICES_RESOLUTION_REQUEST)
                    .show();
        } else {
            Logger.logE(TAG, "This device is not supported.");
        }
        return false;
    }
    return true;
}