6 在系统中定义并获取通知服务的代码使哪一个（）？ A: NotificationManager manager = (NotificationManager) getService(NOTIFICATION_SERVICE); B: NotificationManager manager = (NotificationManager) getService(NOTIFICATION_SERVICE_Manager); C: NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE_Manager); D: NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

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2022-05-31

6 在系统中定义并获取通知服务的代码使哪一个（）？ A: NotificationManager manager = (NotificationManager) getService(NOTIFICATION_SERVICE); B: NotificationManager manager = (NotificationManager) getService(NOTIFICATION_SERVICE_Manager); C: NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE_Manager); D: NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

6 在系统中定义并获取通知服务的代码使哪一个（）？
A: NotificationManager manager = (NotificationManager) getService(NOTIFICATION_SERVICE);
B: NotificationManager manager = (NotificationManager) getService(NOTIFICATION_SERVICE_Manager);
C: NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE_Manager);
D: NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

答案：

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