Android Notification的使用-优快云博客

本文详细介绍了Android 4.1中通知功能的增强，特别是如何使用`android:parentActivityName`属性在点击通知打开的Activity与返回键行为之间的交互。提供了核心代码示例，包括如何构建通知并设置返回栈，确保用户从特定Activity返回到主Activity，而非回到历史任务。

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[size=medium] Android 4.1 (Jelly Bean) 增强了通知功能，在AndroidManifest.xml中可以为Activity添加属性[color=red]android:parentActivityName="MainActivity"[/color]，实现点击通知打开ResultActivity时，再按返回键，回到MainActivity，而不是回到之前的Task。只在4.1的机器上有效，在2.x的机器上和以前没有任何区别。

核心代码如下：[/size]

    public void showNotification() {
    	NotificationCompat.Builder mBuilder =
    			  new NotificationCompat.Builder(this)
    			  .setSmallIcon(R.drawable.ic_launcher)
    			  .setContentTitle("My Notification")
    			  .setContentText("Hello World");

    	//NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();
//    	String [] events = new String[6];
//    	inboxStyle.setBigContentTitle("Event tracker details:");
//    	for (String event : events) {
//    		inboxStyle.addLine(event);
//    	}
//    	mBuilder.setStyle(inboxStyle);

    	Intent intent = new Intent(this, ResultActivity.class);

    	//The stack builder object will contain an artificial back stack for the started Activity.
    	//This ensures that navigating backward from the Activity leads out of your application to the Home screen
    	TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);

    	//Adds the back stack for the Intent (but not the Intent itself)
    	stackBuilder.addParentStack(ResultActivity.class);

    	//Adds the intent that starts the Activity to the top of the stack
    	stackBuilder.addNextIntent(intent);

    	PendingIntent pendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
    	mBuilder.setContentIntent(pendingIntent);

    	mBuilder.setDefaults(Notification.DEFAULT_SOUND);
    	mBuilder.setAutoCancel(true);
    	//mBuilder.setDefaults(Notification.DEFAULT_ALL);

    	NotificationManager mgr = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    	mgr.notify(0, mBuilder.build());
    }

[size=medium]部分AndroidManifiest.xml代码[/size]

<activity android:name=".ResultActivity"
            android:parentActivityName=".MainActivity" >
</activity>

[size=medium]参考：[url]http://developer.android.com/guide/topics/ui/notifiers/notifications.html[/url][/size]