Android之Notification

先来一段代码

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mNotificationManager = (NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE);
Intent intent = new Intent(context,
MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pi = PendingIntent.getActivity(context,
0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

rv = new RemoteViews(context.getPackageName(), R.layout.down_notification);  

NotificationCompat.Builder  mBuilder = new NotificationCompat.Builder(context);   
mBuilder.setPriority(Notification.FLAG_HIGH_PRIORITY);  
Notification notification = mBuilder.build();  
notification.icon = R.drawable.ic_launcher;  
notification.tickerText = "通知内容";  
notification.contentIntent = pi;  
notification.contentView = rv;  
notification.flags |= Notification.FLAG_ONGOING_EVENT;  

mNotificationManager.notify(NOTIFICATION_ID, notification);                                                                             

咱们分段代码分析

[java] view
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mNotificationManager = (NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE);

获取noficationmanger，通知管理器，她可以显示通知或者取消显示。

[java] view
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Intent intent = new Intent(context,
MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pi = PendingIntent.getActivity(context,
0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

设置点击通知栏跳转的activity，特别注意的是

[java] view
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intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

如果栈内已经存在该activity，则不需要再次重新创建该activity，并且清除该activity前面所有的activity显示到最上层。

通知的视图

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rv = new RemoteViews(context.getPackageName(), R.layout.down_notification);

所有的对视图内的控件的操作都可以 用 rv....来实现。

通知栏的优先级：有时候可以看到QQ音乐了，360安全管理了，为什么他们的通知都是显示到嘴上面呢？其实我们的也可以哦

[java] view
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NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context);
mBuilder.setPriority(Notification.FLAG_HIGH_PRIORITY);

这里可以设置优先级，简单不

下面的都是一些基本的配置了

[java] view
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Notification notification = mBuilder.build();
notification.icon = R.drawable.ic_launcher;
notification.tickerText = "通知内容";
notification.contentIntent = pi;
notification.contentView = rv;
notification.flags |= Notification.FLAG_ONGOING_EVENT;

通知显示图标

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notification.icon = R.drawable.ic_launcher;

通知显示的内容

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notification.tickerText = "通知内容";

点击通知跳转的内容

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notification.contentIntent = pi;

通知的视图

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notification.contentView = rv;

使自己的Notification像Android QQ一样能出现在 “正在运行的”栏目下面

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notification.flags |= Notification.FLAG_ONGOING_EVENT;

设置

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notification.flags

为 Notification.FLAG_AUTO_CANCEL ，该标志表示当用户点击 Clear 之后，能够清除该通知。