How can I store and update a common (temporary) data between activities and fragments in Android?

Question

i have an application with multiple fragments and activities. I'm wondering if I can create a container class between fragments. (I want to save with set and pull with get)

For example, I will save the gender information of the user in the FragmentA class, and then I will use this information when I switch to FragmentB. In the same way; I will get the user's age, height, weight in FragmentC class. and then I will access this information in the FragmentE (Final) class and save it to the Room database. How can I do this? Could you please give an example in Java?

Note: I'm using Shared Preferencens but I want to look for a different method as I don't know if it works asynchronously or synchronously. For example, can we create such a container with ViewModel LiveData, store the data and access it from anywhere?

You can also consider a class with static variables. – maddy23285 Oct 06 '22 at 17:47 — maddy23285, Oct 06 '22 at 17:47

ahjo4321hsotuhsa · Accepted Answer · 2022-10-06T18:59:25.277

1

Shared ViewModel in Android to communicate with other fragments. You can save your all data in this SharedViewModel and acsess it in all the fragments.

Please follow this link https://www.geeksforgeeks.org/shared-viewmodel-in-android/

Here they have used two fragment which act as sender and receiver similarly you can create for your multiple fragments

//Java Implementation of SharedViewModel

Sharing data between fragments using new architecture component ViewModel

edited Oct 06 '22 at 18:59

answered Oct 06 '22 at 18:35

ahjo4321hsotuhsa

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Can you share an example for java? – He1 Oct 06 '22 at 18:49
Java example of SharedViewModel https://stackoverflow.com/questions/44272914/sharing-data-between-fragments-using-new-architecture-component-viewmodel – ahjo4321hsotuhsa Oct 06 '22 at 19:00
Thanks for your answer. May I ask another question? Do you think it makes sense to use shared prefrences or sharedviewmodel? – He1 Oct 06 '22 at 19:12
If you want to keep your data saved even if user kills the app then use SharedPrefrences otherwise sharedViewModel – ahjo4321hsotuhsa Oct 07 '22 at 02:20
To understand in detail: https://medium.com/@khadijahameed415/sharedviewmodel-in-kotlin-ec9b09b41a78 – Khadija Hameed Feb 02 '23 at 04:58

How can I store and update a common (temporary) data between activities and fragments in Android?

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