Android Notification的使用

Android 4.1 (Jelly Bean) 增强了通知功能，在AndroidManifest.xml中可以为Activity添加属性android:parentActivityName="MainActivity"，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：

    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());    }

部分AndroidManifiest.xml代码

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

参考：http://developer.android.com/guide/topics/ui/notifiers/notifications.html

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