通知（Notification）初探

通知用法：1.在活動裏創建；2.在廣播接收器裏創建；3.在服務裏創建

步驟：

1.通過NotificationManager來對通知進行管理，調用Context的getSystemService()方法獲取到（參數爲Context.NOTIFICATION_SERVICE）；

2.創建一個Notification對象。參數一：指定通知的圖標；參數二：指定通知ticker內容；參數三：指定通知被創建的時間，以毫秒爲單位

3.對通知的佈局進行設定，調用Notification的setLatestEventInfo()方法來設置。參數一：Context；參數二：標題內容；參數三：正文內容；參數四：點擊事件

4.設置點擊效果，PendingIntent，可根據需求使用getActivity()、getBroadcast()、getService()方法獲取。參數一：Context；參數二：0；參數三：Intent對象；參數四：PendingItent的行爲

5.顯示通知，調用NotificationManager的notify()方法。參數一：id，每個通知所指定的id是唯一的；參數二：Notification對象

NotificationManager mamager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
Notification notification = new Notification(R.drawable.ic_launcher, "This is ticker text",System.currentTimeMillis());
Intent intent = new Intent(this, NotificationActivity.class);
PendingIntent pi = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
notification.setLatestEventInfo(this, "This is content title", "This is content text", pi);
mamager.notify(1, notification);

6.使通知消失

NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
manager.cancel(1);

想要取消哪一條通知，就在cancel()方法中傳入該通知的id

高級技巧

1.音頻

Uri soundUri = Uri.fromFile(new File("/system/media/audio/ringtones/...."));

notification.sound = soundUri;

2.震動

long[] vibrates = {0, 1000, 1000, 1000};
notification.vibrate = vibrates;

下標爲0： 表示手機靜止時常。下標爲1：表示手機震動時常。依次類推

權限：<uses-permission android:name="android.permission.VIBRATE"/>

3.LED燈

			notification.ledARGB = 0xFF0000;
			notification.ledOnMS = 1000;
			notification.ledOffMS = 1000;
			notification.flags = Notification.FLAG_SHOW_LIGHTS;

也可以默認設置，會根據手機的具體環境來設置

notification.defaults = Notification.FLAG_SHOW_LIGHTS;