如何让service不被系统杀掉
简单的方法: 可以让service在前台运行,但是必须执行一个Notification,即调用service 的startForeground方法
A foreground service is a service that's considered to be something the user is actively aware of and thus not a candidate for the system to kill when low on memory. A foreground service must provide a notification for the status bar, which is placed under the "Ongoing" heading, which means that the notification cannot be dismissed unless the service is either stopped or removed from the foreground.
For example, a music player that plays music from a service should be set to run in the foreground, because the user is explicitly aware of its operation. The notification in the status bar might indicate the current song and allow the user to launch an activity to interact with the music player.
To request that your service run in the foreground, call startForeground()
. This method takes two parameters: an integer that uniquely identifies the notification and the Notification
for the status bar. For example:
Notification notification = new Notification(R.drawable.icon, getText(R.string.ticker_text),
System.currentTimeMillis());
Intent notificationIntent = new Intent(this, ExampleActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
notification.setLatestEventInfo(this, getText(R.string.notification_title),
getText(R.string.notification_message), pendingIntent);
startForeground(ONGOING_NOTIFICATION, notification);
To remove the service from the foreground, call stopForeground()
. This method takes a boolean, indicating whether to remove the status bar notification as well. This method does not stop the service. However, if you stop the service while it's still running in the foreground, then the notification is also removed.
Note: The methods startForeground()
and stopForeground()
were introduced in Android 2.0 (API Level 5). In order to run your service in the foreground on older versions of the platform, you must use the previoussetForeground()
method—see the startForeground()
documentation for information about how to provide backward compatibility.
For more information about notifications, see Creating Status Bar Notifications.
要想实现需求,我们只需要在onStartCommand里面调用 startForeground,然后再onDestroy里面调用stopForeground即可!
实际情况就譬如手机里面的音乐播放器一样,不管手机如何休眠,只要开始播放音乐了,就不会kill掉这个服务,一旦停止播放音乐,服务就可能被清掉。
此外,可以参考:
Android开发之如何保证Service不被杀掉(broadcast+system/app)
(转载: http://blog.csdn.net/mad1989/article/details/22492519)