鸿 网 互 联 www.68idc.cn

Android开发学习笔记:Notification和NotificationManager浅析

来源:互联网 作者:佚名 时间:2013-08-30 16:33
Notification和NotificationManager操作相对比较简单,一般获取系统级的服务NotificationManager,然后实例化Notification,设置它的属性,通过NotificationMana

   Notification和NotificationManager操作相对比较简单,一般获取系统级的服务NotificationManager,然后实例化Notification,设置它的属性,通过NotificationManager发出通知就可以了。基本步骤如下:

1.获取NotificationManager

 String service = Context.NOTIFICATION_SERVICE;

NotificationManager mNotificationManager =(NotificationManager)getSystemService(service);

2.实例化Notification对象

3.设置Notification的属性

调用setLatestEventInfo()方法在视图中设置图标和时间。

4.发出通知

   下面是具体的例子,在这个例子里定义了一个MainActivity发出广播通知,美国服务器,定义一个MyReceiver类继承Broadcasts接受通知,当接收完通知之后,服务器空间,启动一个SecondActivity,在SecondActivity类中通过Notification和NotificationManager来可视化显示广播通知。具体的步骤如下:

MainActivity.java

MyReceiver.java

SecondActivity.java

main.xml

second.xml

在AndroidManifest.xml文件中16~21加入对receiver,SecondActivity的声明

效果图:

 Notification丰富的提示方式:

声音提醒

·使用默认声音

notification.defaults |= Notification.DEFAULT_SOUND;

·使用自定义声音

notification.sound = Uri.parse("file:///sdcard/notification/ringer.mp3");

·注:如果定义了默认声音,那么自定义声音将被覆盖

振动提醒

·使用默认振动

notification.defaults |= Notification.DEFAULT_VIBRATE;

·使用自定义振动

long[] vibrate = {0,100,200,300};
notification.vibrate = vibrate;

·注:如果定义了默认振动,那么自定义振动将被覆盖

灯光闪烁提醒

·使用默认闪烁

notification.defaults |= Notification.DEFAULT_LIGHTS;

·使用自定义闪烁

notification.ledARGB = 0xff00ff00; // LED灯的颜色,绿灯
notification.ledOnMS = 300; // LED灯显示的毫秒数,300毫秒
notification.ledOffMS = 1000; // LED灯关闭的毫秒数,1000毫秒
notification.flags |= Notification.FLAG_SHOW_LIGHTS; // 必须加上这个标志

更多特性

可以通过 Notification 的相关字段或标志(flags)为提醒设置更多的特性。

·FLAG_AUTO_CANCEL 标志:当提醒被用户点击之后会自动被取消(cancel);

·FLAG_INSISTENT 标志:在用户响应之前会一直重复提醒音;

·FLAG_ONGOING_EVENT 标志:Add this to the flags field to group the notification under

the "Ongoing" title in the Notifications window.

·FLAG_NO_CLEAR 标志:当在提醒栏中点击“清除提醒”按钮时,该提醒将不会被清除;

·number 字段:This value indicates the current number of events represented by the notification.

The appropriate number is overlaid on top of the status bar icon. If you intend to use this

field, then you must start with "1" when the Notification is first created. (If you change

the value from zero to anything greater during an update, the number is not shown.)

this value to correlate with the drawable's defined in a LevelListDrawable.

·contentView 字段:To define your own layout for the expanded message, instantiate a

RemoteViews object and pass it to the contentView field of your Notification. Pass the

PendingIntent to the contentIntent field.

本文出自 “IT的点点滴滴” 博客,请务必保留此出处

网站空间
网友评论
<