I recently learned Coroutines and I am trying my best to implement it to everything.
I learned you could convert a callback to a coroutine.
Is it possible to convert a Broadcast Receiver to coroutines by using suspendCoroutine?
How do I do this?
Here is one way (courtesy of leonardkraemer and this answer):
suspend fun Context.getCurrentScanResults(): List<ScanResult> {
val wifiManager = getSystemService(Context.WIFI_SERVICE) as? WifiManager ?: return listOf()
return suspendCancellableCoroutine { continuation ->
val wifiScanReceiver = object : BroadcastReceiver() {
override fun onReceive(c: Context, intent: Intent) {
if (intent.action == WifiManager.SCAN_RESULTS_AVAILABLE_ACTION) {
unregisterReceiver(this)
continuation.resume(wifiManager.scanResults)
}
}
}
continuation.invokeOnCancellation {
unregisterReceiver(wifiScanReceiver)
}
registerReceiver(wifiScanReceiver, IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION))
wifiManager.startScan()
}
}