How to know various activities in an android application

Question

I want to see activities of an app downloaded from play store. Basically I want to know the activities of an app so that I can start that application from an android phone or adb. So far I learned that to start an application we can use,

$ sudo adb shell am start -n applicationPackageName/.activityName

eg. $ sudo adb shell am start -n com.google.android.contacts/.ContactsActivity

And is there some other way to start an application from terminal from android phone or from adb?

Answer 1

Easy solution.

Decompile the app and take a look at the AndroidManifest.xml

Actually most developers forget about this option that you can infect start a specific Activity skipping Activities like Login. Make sure you handle stuff like that in your app. Intentionally throwing unhanded IllegalStatExceptions for example, effectively crashing it :)