Question

I am searching for a possibility to store the user ID (received after login) in a way that all Activites have access to it.
If I understood it correctly a SharedPreference is only available for one specific Acitivty.

Which possibilites do I have to save the ID comprehensively?

Greetings,
oetzi

Answer 1

• Option 1: Create a singleton to hold your data (preferred)
• Option 2: Override Application and access the data using the context

Those are for application states which will be non-persistent, meaning that they’re stored in memory and therefor will be lost, as soon as your application quits.

For persistent storage, use one of those.

• Option 1: Use the SharedPrefferences
• Option 2: Use a SQLiteDatabase
• Option 3: Use the internal application memory (for private data)

For more ideas, see the Storage Options article from the Android Docs.