How to get application data?

Question

Java

Hello, I wanted to ask what material is there on how to get information about applications (for example, FB) from my application? I am a beginner and for practice I decided to write an application that displays statistics, for example, the time of using applications installed on the user's phone.

Answer 1

Develop the right mindset.
Is there such ready-made statistics in Android, do you see it there? If there is, look for the API.
If not, implement an algorithm, in this case it is a timer that, say, every 5 seconds checks whether the specified application is running , and saves this data, for example, to a .