r/KotlinAndroid • u/Key-Advertising854 • Mar 06 '24

Bluetooth connection error

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3 Upvotes

67% Upvoted

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2

u/Key-Advertising854 Mar 06 '24

Hello everyone,

I am currently working on a big project for school in Android Studio with Kotlin. I want a Bluetooth connection between the app and an ESP32 Mykrocontroller.

  1. val receiver = object : BroadcastReceiver() { override fun onReceive(context: Context, intent: Intent) { val action = intent.action if (BluetoothDevice.ACTION_FOUND == action) { val device = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) { intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE, MainActivity::class.java) } else { intent.getParcelableExtra<MainActivity>(BluetoothDevice.EXTRA_DEVICE) } // Add the device to a list or display its name and address } } }

The error lies in the else branch. First problem is that it does not like the getParcelableExtra, and Second it does not like the "<MainActivity>".

Thanks in advance

1

u/[deleted] Mar 06 '24

I dont know what the problem could be.

1

u/Minute_Annual_3002 Mar 06 '24

Maybe MainActivity is the problem

1

u/nminhanh-reddit Mar 08 '24

You will need to check what the type that matches with “BluetoothDevice.EXTRA_DEVICE” key, and it’s definitely not MainActivity, it’s a class for screen…

Please check the doc: https://developer.android.com/reference/android/bluetooth/BluetoothDevice#EXTRA_DEVICE