Eldhopj

import android.annotation.SuppressLint
import android.content.SharedPreferences
import androidx.appcompat.app.AppCompatDelegate


private const val COUNTRY_CODE = "COUNTRY_CODE"
private const val FIRST_TIME = "FIRST_TIME"
private const val THEME = "theme"
private const val PREVIOUS_USER = "PREVIOUS_USER"
class PrefManager(val context: Context, private val preferenceName: String = "eldhopj") {

Eldhopj

// calling the Activity B
resultLauncher.launch(Intent(requireContext(), B::class.java))

// we get data in here from B
private var resultLauncher =
registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
    when (result.resultCode) {
        Activity.RESULT_OK -> {
            result.data?.getStringExtra("VALUE")?.let {
                // data received here

Eldhopj

    private suspend fun singleValueEvent((ref: DatabaseReference ,onCancellation: CancellationCallback = {}),onCancellation: CancellationCallback = {}): DataResponse<DataSnapshot> {
        return suspendCancellableCoroutine { continuation -> // can use suspendCoroutine not worry about cancellation
            val valueEventListener = object : ValueEventListener {
                override fun onCancelled(error: DatabaseError) {
                    continuation.resume(DataResponse.Error(error.toException()), onCancellation) // setting data
                }

                override fun onDataChange(snapshot: DataSnapshot) {
                    continuation.resume(DataResponse.Changed(snapshot), onCancellation) 
                }

Eldhopj

interface ConnectivityObserver {

    fun observe(): Flow<Status>

    enum class Status {
        Available, Unavailable, Losing, Lost
    }
}