getInstallerPackageName returns null

Question

In my Android app I wanted to check the source of app installation. I looked at the Android documentation and found the following API as part of the PackageManager class:

Answer 1

if you want to test this the way is to store the apk on the device by using the

adb push 'test.apk' '/sdcard/Download'

then go to the adb shell by typing in 'adb shell' and hitting enter in the terminal then install using the following command

pm install -i 'installernameyouwant' /sdcard/Download/test.apk

when installing the app in above method the call to getInstallerPackageName() returns the installer name you gave in the above command

credits to @mattmook for the "pm install" command.