How to scan for available bluetooth devices in range in android?

问题

I need to get a list of available bluetooth devices in the area using google android 2.1.

Thing is, i don't just need a list of those devices, i need some unique id for each device found and i need an indicator, how "good" the signal is received (like the "level" in android.wifi.ScanResult)... How do i do that?

回答1:

Check out code below :

Starting search

mBluetoothAdapter.startDiscovery(); 
mReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
    String action = intent.getAction();

    //Finding devices                 
    if (BluetoothDevice.ACTION_FOUND.equals(action)) 
    {
        // Get the BluetoothDevice object from the Intent
        BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
        // Add the name and address to an array adapter to show in a ListView
       mArrayAdapter.add(device.getName() + "\n" + device.getAddress());
    }
  }
};

IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND); 
registerReceiver(mReceiver, filter);

回答2:

Call method bluetoothScanning, context is required

void bluetoothScanning(){

    IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
    context.registerReceiver(mReceiver, filter);
    final BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    mBluetoothAdapter.startDiscovery();

}


// Create a BroadcastReceiver for ACTION_FOUND.
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (BluetoothDevice.ACTION_FOUND.equals(action)) {
            // Discovery has found a device. Get the BluetoothDevice
            // object and its info from the Intent.
            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            String deviceName = device.getName();
            String deviceHardwareAddress = device.getAddress(); // MAC address

            Log.i("Device Name: " , "device " + deviceName);
            Log.i("deviceHardwareAddress " , "hard"  + deviceHardwareAddress);
        }
    }
};

Result

Name: LE-Bose Revolve+ SoundLink deviceHardwareAddress: MAC .....

回答3:

This code uses BeaconManager, it continuously scans for new Bluetooth devices and returns a Beacons List object which you can use to get what ever information you need.

Make sure you import BeaconManager

private BeaconManager beaconManager;

//In onCreate method
beaconManager = BeaconManager.getInstanceForApplication(this);
beaconManager.getBeaconParsers().add(new BeaconParser().
                setBeaconLayout("m:2-3=0215,i:4-19,i:20-21,i:22-23,p:24-24"));

//use these out of the onCreate method
public void onScanStart(View view) {
        stopScanButton.setEnabled(true);
        scanningButton.setEnabled(false);
        beaconManager.bind(this);
}

@Override
public void onBeaconServiceConnect() {
    beaconManager.removeAllRangeNotifiers();
    beaconManager.addRangeNotifier(new RangeNotifier() {
    @Override
    public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {
    for (Beacon b : beacons) {
        System.out.println(String.format("%s: %f: %d", b.getBluetoothName(), b.getDistance(), b.getRssi()));
  });
    try {
//Tells the BeaconService to start looking for beacons that match the passed.
        beaconManager.startRangingBeaconsInRegion(new Region("myRangingUniqueId", null, null, null));
    } catch (RemoteException e) {
        Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
    }
}

Let me know if that works for you!

来源：https://stackoverflow.com/questions/3170805/how-to-scan-for-available-bluetooth-devices-in-range-in-android

标签

android

bluetooth

scanning