An Android app remembers its data after uninstall and reinstall

Question

While developing an Android app targeting all versions above 4.1, I observed that uninstalling my app and installing it again does not clear its data.

The app is d

Answer 1

If you are targeting android 10 then you have to put android:hasFragileUserData="true" in application tag of AndroidManifest.xml

  

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android:hasFragileUserData is a new manifest setting (I’m guessing on ). “If true the user is prompted to keep the app’s data on uninstall”. This seems ripe for abuse, but I can see where it might be useful for some apps.

See https://commonsware.com/blog/2019/06/06/random-musings-q-beta-4.html