How in application A to track when application B closes?

Question

Java

There are 2 applications (A, B). It is necessary to track in application A when application B closes

11-18 11:29:18.075 219-219/? I/BufferQueueConsumer: [com.venom.tonuka.tsd/com.e1c.mobile.App](this:0x7f7bb78000,id:637,api:1,p:-1,c:-1) disconnect(C)
11-18 11:29:18.075 219-219/? I/BufferQueue: [com.venom.tonuka.tsd/com.e1c.mobile.App](this:0x7f7bb78000,id:637,api:1,p:-1,c:-1) ~BufferQueueCore
11-18 11:29:20.027 732-753/? I/ActivityManager: Killing 15593:com.venom.tonuka.tsd/u0a96 (adj 9): remove task

Answer 1

not solvable in the current realities of the play. The rules are getting tougher. Privacy .... The point is that the adders will each sit in their own sandbox and will not have the right to lean out of it. Already in the 12th android, in order to simply catch the intent, you need to fill out a special section of the manifest. to simply check for the presence of a certain program, also prescribe its package name in the query.
If the main purpose of the application is not related to such time management, then moderation will not miss it.
So it goes / If your application A is the default launcher (see parental control), then there is a solution, as it were. And if the application is simply installed on the phone, then spying is impossible.