return int value from dataStore preferences

Question

I have an application where I'm saving int value using datastore preferences , when I get the value , I execute the code and want to return that int value so that I can use it in different places in my code but could not figure it out , if anyone can help , thank you in advance

I tried to make a global member to assign that value and then return but since the value is returned asynchronously , it is crashing the app .

This is my code

private fun setTextSize() : Int {
        val dataStore = requireContext().createDataStore("textSize")
        lifecycleScope.launch { 
            dataStore.data.collect { 
              val textSize =  it[Common.TEXT_SIZE_PREFERENCE] 
            }
        }
    }

user_1511776 · Answer

If you want to get the value directly you should use runBlocking. Something like this should do the trick:

val textSize = runBlocking { dataStore.data.first() }[Common.TEXT_SIZE_PREFERENCE]

user_3159267 · Answer

You can add suspend modifier to your function and access it using CoroutineScope as

suspend fun setTextSize() = dataStore.data.firstOrNull()[Common.TEXT_SIZE_PREFERENCE] ?: -1

While accesing

lifeCycleScope.launch{
    val textSize = setTextSize()
}

return int value from dataStore preferences

2 Answers