How to force delete application data on uninstall (Android)?

Question

There is a strange function in some Android devices (at least Galaxy S7): they restore data (for example the SQLite database) when the application is reinstalled. This behavior interrupts my app because the data is supposed to be deleted during uninstallation.

How can I force Android to completely delete all that data when the app is manually uninstalled?

Answer 1

You have to disable the backup from AndroidManifest.xml

android:allowBackup="false"
tools:replace="android:allowBackup"

N.B: If you use any third party library that use android:allowBackup="true" then it conflicts and give error. To resolve this and override the setting you also have to add tools:replace="android:allowBackup".