Im implementing a simple blutooth classic scan from the official docs on my Redmi Note 4 (Bluetooth 4.1).
However I am not seeing a toast that should appear when the onReceive function on the broadcast receiver is called.
What could be wrong here?
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
defaultAdapter = BluetoothAdapter.getDefaultAdapter()
if (defaultAdapter == null) {
toast("no adapter")
return
}
if (!defaultAdapter!!.isEnabled) {
val enableBluetoothIntent = Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE)
startActivityForResult(enableBluetoothIntent, REQUEST_ENABLE_BLUETOOTH)
}
searchButton.setOnClickListener { newDevicesList() }
val filter = IntentFilter(BluetoothDevice.ACTION_FOUND)
Log.i("receiver", "registering receiver")
registerReceiver(receiver, filter)
}
private val receiver = object : BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent) {
toast("maybe i find new device who know")
when (intent.action) {
BluetoothDevice.ACTION_FOUND -> {
// Discovery has found a device. Get the BluetoothDevice
// object and its info from the Intent.
val device: BluetoothDevice? =
intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE)
val deviceName = device?.name
val deviceHardwareAddress = device?.address // MAC address
toast("device $deviceName was found")
}
BluetoothAdapter.ACTION_DISCOVERY_FINISHED -> {
context.unregisterReceiver(this)
}
}
if (defaultAdapter!!.isDiscovering) {
toast("scan already in progress")
} else {
toast("starting discovery")
defaultAdapter!!.startDiscovery();
}
}
How do i know that the onReceive function never gets called? cause this toast toast("maybe i find new device who know") never appears.
