'Share and persist an ID/string between Android apps
I'm working on an app for a customer that already have a couple of apps. Request is to find a way to have an ID/string that could be generated (using a GUID) and shared between that set of apps. A sort of "CustomerDeviceID". i.e. When user installs the first app from that publisher an ID is generated and stored in some way. Then, when user installs the second or third app, that ID could be retrieved and used. Obviously that process should NOT be driven by the user (no pickers, no permissions, no intents). Android provides ANDROID_ID to do that but it is generated using keystore, so apps should also be signed using the same keystore (customer apps aren't!). On iOS we are using shared keychain, but I can't find a way to do that on Android... any ideas? Thanks in advance
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