Android 14 - Apps can kill only their own background processes

From OS 14 (regardless of targeting OS 14), when your app calls killBackgroundProcesses(), the API can kill only the background processes of your own app.

 

killBackgroundProcesses (API level 8)

How to kill the background service process:

// manifest
<uses-permission android:name="android.permission.KILL_BACKGROUND_PROCESSES" />

// kill the background service process
val activityManager = getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
activityManager.killBackgroundProcesses("jp.naver.line.android")

In previous OS versions, It can kill the process of another package name:

// OS9
2023-05-31 16:09:33.231   953-9505  ActivityManager         system_server                        I  Killing 2272:jp.naver.line.android:transcoding/u0a143 (adj 900): kill background

// OS12
2023-05-31 16:39:27.797   959-5166  ActivityManager         system_server                        I  Killing 17228:jp.naver.line.android:transcoding/u0a395 (adj 905): kill background

// OS13
2023-05-31 16:45:47.126  1301-2483  ActivityManager         system_server                        I  Killing 19459:jp.naver.line.android:transcoding/u0a328 (adj 965): kill background

If you pass in the package name of another app, this method has no effect on that app's background processes, and the following message appears in Logcat:

// OS14 - targets Android 13 or 14
2023-05-31 16:35:11.720   540-917   ActivityManager         system_server                        W  Invalid packageName: jp.naver.line.android

 

Refers

https://blog.esper.io/google-crack-down-task-killer/

https://developer.android.com/about/versions/14/behavior-changes-all?authuser=4#kill-own-background-processes