Change the Android bluetooth device name

Thanks for the original answer, here are a few things I found when implementing that might help someone else out.

1) BT has to be enabled for setName() to work.

2) It takes time for BT to Enable. ie. you Can't just call enable() then setName()

3) It takes time for the name to "sink in". ie. you can't call getName() right after setName() and expect the new name.

So, here is a snippet of code I came up with to use a runnable to get the job done in the background. It is also time bound to 10seconds, so it won't run forever if there is a problem.

Finally, this is part of our power on check, and we normally leave BT disabled (due to battery). So, I turn BT back off after, you may not want to do that.

// BT Rename
//
final String sNewName = "Syntactics";
final BluetoothAdapter myBTAdapter = BluetoothAdapter.getDefaultAdapter();
final long lTimeToGiveUp_ms = System.currentTimeMillis() + 10000;
if (myBTAdapter != null)
{
    String sOldName = myBTAdapter.getName();
    if (sOldName.equalsIgnoreCase(sNewName) == false)
    {
        final Handler myTimerHandler = new Handler();
        myBTAdapter.enable();
        myTimerHandler.postDelayed(
                new Runnable()
                {
                    @Override
                    public void run()
                    {
                        if (myBTAdapter.isEnabled())
                        {
                            myBTAdapter.setName(sNewName);
                            if (sNewName.equalsIgnoreCase(myBTAdapter.getName()))
                            {
                                Log.i(TAG_MODULE, "Updated BT Name to " + myBTAdapter.getName());
                                myBTAdapter.disable();
                            }
                        }
                        if ((sNewName.equalsIgnoreCase(myBTAdapter.getName()) == false) && (System.currentTimeMillis() < lTimeToGiveUp_ms))
                        {
                            myTimerHandler.postDelayed(this, 500);
                            if (myBTAdapter.isEnabled())
                                Log.i(TAG_MODULE, "Update BT Name: waiting on BT Enable");
                            else
                                Log.i(TAG_MODULE, "Update BT Name: waiting for Name (" + sNewName + ") to set in");
                        }
                    }
                } , 500);
    }
}

Yes you can change your device name using setName(String name) of BluetoothAdapter type.Following is the sample code:

    private BluetoothAdapter bluetoothAdapter = null;
    bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

    void ChangeDeviceName(){
                    Log.i(LOG, "localdevicename : "+bluetoothAdapter.getName()+" localdeviceAddress : "+bluetoothAdapter.getAddress());
                    bluetoothAdapter.setName("NewDeviceName");
                    Log.i(LOG, "localdevicename : "+bluetoothAdapter.getName()+" localdeviceAddress : "+bluetoothAdapter.getAddress());
                }