How do I differentiate from which store app is ins

Question

My app. is deployed in Play Store as well as Baidu Store. For notificatiions, need to differentiate from where app. is installed.

When I used getInstallerPackageName() method, Redmi Note 3 returns correct value but HTC returns null.

Why is this difference observed ?

Is there any other better way ?

Answer 1

Regarding this answer: https://stackoverflow.com/a/13293534/2724879 i suggest that when its null then its from Baidu and when its com.android.vending then its from google xD