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Is SharedPreferences necessary for all data?

I am new in Android.

I have a database like this.

enter image description here

I used SharedPreferences for remember user information.

However, there is a point that I do not understand. When the user logins the application, do I need to save all Firebase data in SharedPreference for the application to remember the user?

Which type of datas save in SharedPreference? I just want, If a user logins the application, my application will remember the user and its checkboxes, comments, likes or something else.

It might be a stupid question, but I am new in this. Thank you for all.

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Answer

Yes you can use sharedPreferences for this purpose. You can save int, String, boolean, float, double… in sharedPreferences.

You need to save user information in sharedPreferences on login.

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