Android 蓝牙设备 Kotlin

Question

pairedDevices=mBluetoothAdapter?.bondedDevices
for (d in listOfNotNull(pairedDevices)) {
    blueArray?.add(d._____)
}

blueArray is an ArrayList in which i want to store the string name of available bluetooth devices but - d.getName() is not working

What can i do?

Answer 1

listOfNotNull() in this case will simply create a list with the sole element of what getBondedDevices() returns. You're creating a List<Set<BluetoothDevice>> and trying to call getName() on the Set .

Might want to do something like this instead:

for (device in mBluetoothAdapter.bondedDevices) {
    blueArray.add(device.name)
}

Answer 2

You should declare pairedDevice as set of BluetoothDevice then iterate through the set and add to your array

val pairedDevice: Set<BluetoothDevice>? = bluetoothAdapter?.bondedDevices
        if (pairedDevice != null){
            var listDeviceName = arrayListOf<String>()
            try {
                pairedDevice.forEachIndexed { index, device ->
                    listDeviceName.add(index, device.name)
                }catch (e:IndexOutOfBoundsException){
                Log.e("TAG", "indexOutOfBond",e)
            }