Can you send me the analyzer log? 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] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en
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