PlayServicesUtils - Get Advertising Id

PlayServicesUtils.java

public class PlayServicesUtils {
  private static String advertisingId = "";
  private static boolean limitAdTrackingEnabled = false;

  private PlayServicesUtils() {
  }
 
  public static void prepareAdvertisingId(final Context context) {
    if (TextUtils.isEmpty(advertisingId)) {
      new Thread(new Runnable() {
        public void run() {
          advertisingId = internalGetAdvertisingId(context);
          limitAdTrackingEnabled = internalIsPlayTrackingEnabled(context);
        }
      }).start();
    }
  }

  private static String internalGetAdvertisingId(Context context) {
    try {
      Object AdvertisingInfoObject = getAdvertisingIdInfoObject(context);
      return (String) invokeInstanceMethod(AdvertisingInfoObject, "getId", null);
    } catch (Throwable t) {
      return null;
    }
  }

  private static Boolean internalIsPlayTrackingEnabled(Context context) {
    try {
      Object AdvertisingInfoObject = getAdvertisingIdInfoObject(context);
      Boolean isLimitedTrackingEnabled =
          (Boolean) invokeInstanceMethod(AdvertisingInfoObject, "isLimitAdTrackingEnabled", null);
      return isLimitedTrackingEnabled == null ? false : isLimitedTrackingEnabled;
    } catch (Throwable t) {
      return false;
    }
  }

  private static Object getAdvertisingIdInfoObject(Context context) throws Exception {
    return invokeStaticMethod("com.google.android.gms.ads.identifier.AdvertisingIdClient", "getAdvertisingIdInfo",
        new Class[] { Context.class }, context);
  }

  private static Object invokeStaticMethod(String className, String methodName, Class[] classArgs, Object... args)
      throws Exception {
    Class classObject = Class.forName(className);
    return invokeMethod(classObject, methodName, null, classArgs, args);
  }

  private static Object invokeMethod(Class classObject, String methodName, Object instance, Class[] classArgs,
      Object... args) throws Exception {
    @SuppressWarnings("unchecked") Method methodObject = classObject.getMethod(methodName, classArgs);
    if (methodObject == null) {
      return null;
    }
    return methodObject.invoke(instance, args);
  }

  private static Object invokeInstanceMethod(Object instance, String methodName, Class[] classArgs, Object... args)
      throws Exception {
    Class classObject = instance.getClass();
    return invokeMethod(classObject, methodName, instance, classArgs, args);
  }

  public static String getAdvertisingId() {
    return advertisingId;
  }

  public static boolean isLimitAdTrackingEnabled() {
    return limitAdTrackingEnabled;
  }
}