unable to make connection between 2 device bluetooth android

Question

I have tried to connect two devices by using the Android Bluetooth Chat example on the Android developer site. It\'s only connecting from one of the devices and when I am tryi

Answer 1

I also think your problem is not within your code.

Two Years ago I have modified the BluetoothChat example application. You can find the modified project here - Bluetooth Chat and the binary here: Bluetooth Chat

If this works better between your two devices it might help.

I tested it just now on Android version 2.3.3 (Nexus One) and on Version 4.0.4 (Galaxy Nexus).

Answer 2

I have done this,and i think you get connection lost when the device discoverable change. Please do check the device discoverable in both,you can enable it by code.

Intent discoverableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,0);
startActivity(discoverableIntent);

Answer 3

I'm not sure if just copy the code straight away and try to run it if so, bear in mind android.app.ActionBar; require version 3.0. Also Bluetooth communication is not exactly peer to peer it's Master Slave.

Answer 4

Saurabh, make this change please and watch it work:

                if (Build.VERSION.SDK_INT < 9) { // VK: Build.Version_Codes.GINGERBREAD is not accessible yet so using raw int value
                // VK: 9 is the API Level integer value for Gingerbread
                try {
                    tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
                } catch (IOException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
            } else {
                Method m = null;
                try {
                    m = device.getClass().getMethod("createInsecureRfcommSocketToServiceRecord", new Class[] { UUID.class });
                } catch (NoSuchMethodException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                try {
                    tmp = (BluetoothSocket) m.invoke(device, (UUID) MY_UUID);
                } catch (IllegalAccessException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (InvocationTargetException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }