CODEWITHSUNDEEP
androidbluetooth
deepak tiwari
deepak tiwari

Reputation: 107

BluetoothProfile of Paired android device

is there any way to get the Profile of a paired blutooth device. i have been able to pair a bluetooth device and it has been paired as INPUT_DEVICE in android, i get the Object of BluetoothDevice for that , which contains the address and other things, but if the android has stored it's profile then from where we can get the paired device profile , like is it HEADSET or A2DP or INPUT_DEVICE or other.

i have already tried the method of service listener

private BluetoothProfile.ServiceListener listener=new BluetoothProfile.ServiceListener() {

        @Override
        public void onServiceDisconnected(int profile) {
            // TODO Auto-generated method stub
            //if(profile==BluetoothProfile.HEADSET)
                headSet=null;
        }

        @Override
        public void onServiceConnected(int profile, BluetoothProfile proxy) {
            // TODO Auto-generated method stub
            switch(profile){
            case BluetoothProfile.HEADSET:
                Log.e("found","headset");
                break;
            case BluetoothProfile.A2DP:
                Log.e("found","a2dp");
                activity.onA2DPListenr((BluetoothA2dp) proxy);
                break;
            case BluetoothProfile.HEALTH:
                Log.e("found","HEALTH");
                break;
            }


            }
        }
    };

now whenever i call it via

activity.getAdapter().getProfileProxy(activity, listener,
                BluetoothProfile.HEADSET);

it'll go to headset log, and when i call with

activity.getAdapter().getProfileProxy(activity, listener,
                BluetoothProfile.HEALTH);

it'll go to health log, and shows that the profile has been connected for same device.but the same device can bot be both.

also my requirment totally different from this, i don't want to try different scenarios to find out the actual profile of my paired device which android already contains, is their any way to get the actual profile..?

Upvotes: 1

Views: 2727

Answers (1)

deepak tiwari
deepak tiwari

Reputation: 107

the bluetooth profile or service associated with the BluetoothDevice can be found by 

    boolean hasLatestUuids=device.fetchUuidsWithSdp();
            if(hasLatestUuids){
/*getUuids() return cached uuids so we need to make an sdp request to get refresh uuid associated with the device*/
                ParcelUuid[] uu=device.getUuids();
                for(ParcelUuid u:uu){
                    Log.e("found","uuid "+u.getUuid());
                }
            }

we can also make request via reflection as:

Method m=null;
        boolean hasLatestUuid=false;
        try {
            m=BluetoothDevice.class.getDeclaredMethod("fetchUuidsWithSdp", null);
            m.setAccessible(true);
            hasLatestUuid=(Boolean) m.invoke(device, null);
        } catch (NoSuchMethodException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IllegalArgumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        ParcelUuid[] uuids=null;
if(hasLatestUuid){
    try {
        m=device.getClass().getDeclaredMethod("getUuids", null);
        m.setAccessible(true);
        uuids=(ParcelUuid[]) m.invoke(device, null);
    } catch (NoSuchMethodException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IllegalArgumentException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (InvocationTargetException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    if(uuids!=null){
        for(ParcelUuid u:uuids){
            Log.e("found","uuid "+u.describeContents());
            Log.e("found","uuid "+u.getUuid());
        }
    }

here the log return the uuids list supported by the remote device, for example in my case i need to connect to two different devices , first one with HID profile and second with serial port or socket, so

for serial port device i am getting uuid:00001101-0000-1000-8000-00805f9b34fb

for HumanInterface i am getting uuid:00001124-0000-1000-8000-00805f9b34fb

it has bas_uuid:00000000-0000-1000-8000-00805F9B34FB and for serialPort:0x1101 and for HID:0x1124

all these information can be found http://bluetooth-pentest.narod.ru/doc/assigned_numbers_-_service_discovery.html

we can also check this via BluetoothClass i.e

public static final int PROFILE_HEADSET = 0;
/** @hide */
public static final int PROFILE_A2DP = 1;
/** @hide */
public static final int PROFILE_OPP = 2;
/** @hide */
public static final int PROFILE_HID = 3;
/** @hide */
public static final int PROFILE_PANU = 4;
/** @hide */
public static final int PROFILE_NAP = 5;


BluetoothClass myClass=device.getBluetoothClass();
        int val=myClass.getDeviceClass();
        Log.e("found","class "+val);
        Log.e("found","class "+(val|bitmask));

        Log.e("found","PROFILE_HEADSET:"+doesclassMatch(PROFILE_HEADSET,myClass));
        Log.e("found","PROFILE_A2DP:"+doesclassMatch(PROFILE_A2DP,myClass));
        Log.e("found","PROFILE_OPP:"+doesclassMatch(PROFILE_OPP,myClass));
        Log.e("found","PROFILE_HID:"+doesclassMatch(PROFILE_HID,myClass));
        Log.e("found","PROFILE_PANU:"+doesclassMatch(PROFILE_PANU,myClass));
        Log.e("found","PROFILE_NAP:"+doesclassMatch(PROFILE_NAP,myClass));




private boolean doesclassMatch(int profile,BluetoothClass myClass){
    Method m=null;
    try {
        m=BluetoothClass.class.getMethod("doesClassMatch", new Class[]{int.class});
        m.setAccessible(true);
        return (Boolean) m.invoke(myClass, profile);
    } catch (NoSuchMethodException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IllegalArgumentException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (InvocationTargetException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return false;

}

it'll return true for particular type or service the device contain.

but as per BluetoothClass specification:

BluetoothClass is useful as a hint to roughly describe a device
 * (for example to show an icon in the UI), but does not reliably describe which
 * Bluetooth profiles or services are actually supported by a device. Accurate
 * service discovery is done through SDP requests, which are automatically
 * performed when creating an RFCOMM socket with 
 * BluetoothDevice#createRfcommSocketToServiceRecord} and 
 * BluetoothAdapter#listenUsingRfcommWithServiceRecord

https://android.googlesource.com/platform/frameworks/base/+/4f868ed/core/java/android/bluetooth/BluetoothClass.java

Upvotes: 2

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