Best way to store common data in Android at session?

Question

When user open my Application.

It will call API to my server, and take the json and stored in somewhere, and the json It stored can use anywhere in my application (any Activity, any Fragment, like SharedPreference).

When user close the application, data will clear. Reopen it, It's will calling and storing data again.

What method should I can use? Or any other implementation? Thank you

you could also use a fragment and set `retaininstance(true)` and use it as model — tscheppe, Aug 18 '20 at 10:22
@mikenlanggio Yes you can. See : https://stackoverflow.com/a/5919074/2808493 — Armin, Aug 18 '20 at 11:25
@Armin I mean. Should I use `SharedPreference` to store data json. Because, the data may has large amounts. Any affect to performance, memory, speed? Should I use Singleton class instead? — mikenlanggio, Aug 19 '20 at 03:44

score 0 · Answer 1 · answered Aug 18 '20 at 10:14

0

Extend Application class like this:

    class Global: Application() {
    
        init { instance = this }
    
        companion object {
            private var instance: Global? = null
            lateinit var json: JSONProp
        }

        override fun onCreate() {
            super.onCreate()
            //Fetch Json and store it in jsonProp
        }
    }

Manifest:

<application android:name=".Global" />

You can then use the data anywhere in the app while it's alive like this:

val json = Global.json

answered Aug 18 '20 at 10:14

Simon

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What difference when implement `Application` vs just Singleton class? – mikenlanggio Aug 18 '20 at 10:28
It is convenient for things that should be set up before any of your application logic is executed (I understood you want to fetch the Json as soon as possible on the app start). – Simon Aug 18 '20 at 11:15

Best way to store common data in Android at session?

1 Answers1