How do I find main activity on Android?

This can be found in the application’s manifest. The main activity is the activity with the intent-filter whose name is android.

What is main activity in Android?

An Android activity is one screen of the Android app’s user interface. In that way an Android activity is very similar to windows in a desktop application. … The Android app starts by showing the main activity, and from there the app may make it possible to open additional activities.