how come I cannot see the method:
Method m = btdev.getClass().getMethod("createRfcommSocket", new Class[] {
int.class });Anything wrong with my dev/sdk env? or is it a hidden API? On Thu, Feb 4, 2010 at 2:33 AM, Bwd <[email protected]> wrote: > Good day. > I was able to create a stable connection to the BT device. > To do this, I changed your code: > BluetoothSocket btsocket = > btdev.createRfcommSocketToServiceRecord(uuid); > btsocket.connect(); > > Upon: > int RFCOMM_CHANEL = 1; //SPP chanel > Method m = btdev.getClass().getMethod("createRfcommSocket", new > Class[] { int.class }); > BluetoothSocket connection = (BluetoothSocket) m.invoke(btdev, > RFCOMM_CHANEL); > connection.connect(); > > And now the connection has been stable and not broken and you can read > and receive data by input and output streams. > > > On 16 янв, 02:48, Sean Liao <[email protected]> wrote: > > Anyone look into or experienced the same problem using the role switch > > feature? I think this may be a bug on the android sdk: > > > > If android bt advertise it support role switch and it should fullfil the > > request from remote device. Or, it should simply advertise that it > doesn't > > support role switch so the remote device would not request role switch? > > > > is that how it suppose to work? comments? > > > > On Mon, Nov 30, 2009 at 11:36 AM, Sean Liao <[email protected]> > wrote: > > > We hooked up a BT protocol analyzer to monitor why connection getting > > > dropped right after connection. We are certain it is due to "Role > Switch". > > > By disable role switch, I have successfully established connection, > read > > > and write. > > > > > The behavior seems not right, and I think there may be a problem on my > > > Android phones. The following is what I observed from the protocol > > > analyzer: > > > > > 1. Android makes a connection to remote device. It is succesful. > > > 2. Remote device requests "Role Switch". > > > => Android "must" response yes (I believe, otherwise, connection > > > would just stay and no further steps shall take place) > > > > > 3. Android immediately disconnects the above connection. > > > 4. The remote device attempts to establish a connection to my Android > > > phone, it fails. I can see the remote device trying to negotiate > connection > > > rate but eventually giving up. > > > > > The above I believe 3 and 4 are the steps when role switch taken place. > I > > > could be wrong but by disable role switch on remote device, the > connection > > > is fairly robust. > > > > > May I request "role switch" feature for next release? > > > > > Best regards, > > > Sean > > > > > On Tue, Nov 24, 2009 at 12:45 PM, Sean Liao <[email protected] > >wrote: > > > > >> Hi, I wrote a simple test driver to test the bluetooth apis. Anyone > can > > >> verify whether I am using the API correctly? Everything seems good > but no > > >> data read :-( > > > > >> > =========================================================================== > > >> // before calling the following, inquiry scan successfully returned, > and > > >> the remote device is pre-paired. > > > > >> private boolean doTestConnection() { > > > > >> Log.d("SwxBtCommImpl", "doTestConnection"); > > > > >> String btAddr = "00:08:1B:CA:C7:29"; > > > > >> BluetoothDevice btdev = > > >> BluetoothAdapterImpl.getInstance().getRemoteDevice(btAddr); > > > > >> // widcom using the following GUID > > >> // 00001101-0000-1000-8000-00805F9B34FB > > >> UUID uuid = > UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); > > > > >> try { > > >> BluetoothSocket btsocket = > > >> btdev.createRfcommSocketToServiceRecord(uuid); > > > > >> btsocket.connect(); > > >> Log.d("SwxBtCommImpl", "connected"); > > > > >> try { > > >> Thread.sleep(1000); > > >> } catch (InterruptedException e1) { > > >> // TODO Auto-generated catch block > > >> e1.printStackTrace(); > > >> } > > > > >> InputStream instream = btsocket.getInputStream(); > > >> Log.d("", "getInputStream"); > > > > >> byte[] data = new byte[512]; > > >> for (int i = 0; i < 20; i++) { > > >> int numOfAvailable = instream.available(); > > > > >> Log.d("SwxBtCommImpl", "read " + i + ": " + numOfAvailable > + " > > >> bytes"); > > >> if(numOfAvailable > 0) { > > >> int numOfRead = instream.read(data); > > >> Log.d("SwxBtCommImpl", new String(data) + "-" + > numOfRead); > > >> } else { > > > > >> try { > > >> Thread.sleep(500); > > >> } catch (InterruptedException e) { > > >> // TODO Auto-generated catch block > > >> e.printStackTrace(); > > >> } > > >> } > > >> } > > > > >> instream.close(); > > >> instream = null; > > > > >> btsocket.close(); > > > > >> } catch (IOException e) { > > >> // TODO Auto-generated catch block > > >> Log.e("", "bt connection failed", e); > > >> } > > > > >> return true; > > >> } > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected]<android-developers%[email protected]> > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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