Android status bar notification notification, Notificationmanager introduction

Notification (notice) generally used in the phone, sms, mail, Alarm clock, in the status bar of the phone will appear a small icon, prompting the user to handle this notification, then the hand from the top of the slide status bar can be expanded and processed this notice;

In the Android system, it is convenient to send a status bar notification. Send a status bar notification must use two classes: Notificationmanager, Notification;

Notificationmanager: is the status bar notification management class, responsible for the notification, clear notification, etc. notificationmanager is a system service that must begetSystemService()方法来获取;

Notification: is the specific status bar notification object, you can set icon, text, cue sound, vibration and so on parameters;

Let's look at the basic parameters required for the next notification:

(1) Icon: icons;

(2) Pendingintent: Click the notification execution page to jump;

(2) Ticker text:notification just out of the time, in the status bar scrolling subtitles, if very long, will automatically split the scroll;

(3) The title of Content Title:notification after its expansion;
(4) Content text:notification after the expansion;

A notification usually requires the following steps:

(1) Get Notificationmanager:

Nmanager = (Notificationmanager) getsystemservice (Notification_service);

(2) Instantiate the notification object and set the properties of the notification;

Notification.icon = R.drawable.icon;//set the icon that the notification displays in the status barNotification.tickertext = "one Message is coming!!!";//notification of what is displayed in the status barNotification.when = when;//set the time to notifyNotification.sound = Uri.parse ("Android.resource://com.sun.alex/raw/dida");//Custom SoundsNotification.flags |= Notification.flag_auto_cancel;//clicking the Clear button or clicking the notification will automatically disappearNotification.flags |= notification.flag_insistent;//All the time , like music always playing, knowing the user responseNotification.defaults = Notification.default_sound;//call system comes with soundNotification.defaults = notification.default_vibrate;//Set Default VibrationNotification.defaults = Notification.default_all;//set the ringtone to vibrateNotification.defaults = Notification.default_all;//set all properties to the default

(3) Call the Setlatesteventinfo () method to set the icon and time in the view;

// Instantiate Intent New Intent (mainactivity.  this, mainactivity. class ); // Get Pendingintent Pendingintent pintent = pendingintent.getactivity (mainactivity.  this, 00); // Set Event information notification.setlatesteventinfo (mainactivity.  this, "Title", "Content",pintent);

(4) Notification: A notification message is executed by the Notify () method of the Notificationmanager object;

Private int notification_id =nmanager.notify (notification_id, Notification);

(5) Clear notification: Through the Notificationmanager cancel (int) method, to clear a notification, where the parameter is the unique identification ID of notification, of course, can also be cancelall () to clear the status bar all notifications;

Nmanager.cancel (notification_id);

Here's an example to illustrate:

Three buttons, respectively, are sent, then updated, the last clear notification;

The first step, click Send after;

Then check the notification:

In the second step, click Update Notifications, and then view the notifications:

Step three: Clear notifications:

The implementation code is as follows:

Layout file Activity_main.xml only three buttons, do not write;

mainly see Mainactivity.java

 Packagecom.xiaozhang.notificationtest;Importandroid.app.Activity;Importandroid.app.Notification;ImportAndroid.app.NotificationManager;Importandroid.app.PendingIntent;Importandroid.content.Intent;ImportAndroid.os.Bundle;ImportAndroid.view.View;ImportAndroid.view.View.OnClickListener;ImportAndroid.widget.Button; Public classMainactivityextendsActivity {PrivateButton button1, Button2, Button3; //Notification Manager    PrivateNotificationmanager Nmanager; //Notification Display content    Privatependingintent pendingintent; @Override Public voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main);    Init (); }    Private voidinit () {button1=(Button) Findviewbyid (R.id.button1); Button2=(Button) Findviewbyid (R.id.button2); Button3=(Button) Findviewbyid (R.id.button3);        Button1.setonclicklistener (onclick);        Button2.setonclicklistener (onclick);        Button3.setonclicklistener (onclick); Nmanager=(Notificationmanager) Getsystemservice (Notification_service); Intent Intent=NewIntent ( This, Mainactivity.class); Pendingintent= Pendingintent.getactivity (mainactivity. This, 0, Intent,0); } onclicklistener onclick=NewOnclicklistener () {Private intnotification_id = 110; PrivateNotification Notification; @SuppressWarnings ("Deprecation") @Override Public voidOnClick (View v) {Switch(V.getid ()) { Caser.id.button1:notification=NewNotification (); Notification.icon= R.drawable.icon;//set the icon that the notification displays in the status barNotification.tickertext = "one Message is coming!!!";//notification of what is displayed in the status bar//If you want to take all of the default values, use Default_all. //The default sound is used hereNotification.defaults |=Notification.default_sound; Notification.defaults|=notification.default_vibrate; Notification.defaults|=notification.default_lights; //let the sound and vibration loop indefinitely until the user respondsNotification.flags |=notification.flag_insistent; //automatically disappears when notifications are clickedNotification.flags |=Notification.flag_auto_cancel; //Second parameter: message caption displayed when drop-down status bar//third parameter: message content displayed when drop-down status bar//Fourth parameter: Perform a page jump when you click on the notificationNotification.setlatesteventinfo (mainactivity. This, "Notification 1",                        "First message: One message", pendingintent); //Issue status bar notificationsnmanager.notify (notification_id, Notification);  Break;  CaseR.id.button2://Update Notifications//For example, the status bar prompt has a new text message, haven't had time to check, and a new message prompt, you can update the original notification method. //(It is also possible to resend a notification, but this will cause confusion in the notification, and display multiple notifications to the user, not user friendly)Notification.setlatesteventinfo (mainactivity. This, "Notification 2",                        "Second message: Second message", pendingintent);                Nmanager.notify (notification_id, Notification);  Break;  CaseR.id.button3:nmanager.cancel (notification_id);  Break; }        }    };}

Android status bar notification notification, Notificationmanager introduction