Detect when user launches a new application on an Android device

Question

I have been trying to detect when the user launches an application on his/her device.

So I found this solution:

https://stackoverflow.com/a/7239840/833219

Answer 1

you can detect application launch with tag of ActivityManager in logs.

in log you can find useful data.you can detect run packages.

for example :

06-06 16:09:06.007: I/ActivityManager(1663): Starting: Intent { act=android.intent.action.MAIN flg=0x10840000 cmp=com.android.phone/.InCallScreen } from pid -1

it is com.android.phone package and InCallScreen starts for first page.

you can check packages name and detect when your target application launched.