Here is a simple guide on how to check the appPackage and appActivity in apk.

How to Check the appPackage or appActivity of an APK

Option 1:

1. aapt dump badging xxxx.apk
2. Lookup “package: name” and “launchable-activity: name” in terminal’s output

Option 2:

1. java -jar apktool_2.3.3.jar d xxxx.apk
2. Lookup appPackage and appActivity in AndroidManifest.xml