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java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()	at android.os.Handler.(	at android.bluetooth.BluetoothAdapter$1.(	at android.bluetooth.BluetoothAdapter.(	at android.bluetooth.BluetoothAdapter.getDefaultAdapter(	at	at	at lejos.pc.comm.NXTConnector.connectTo(	at lejos.pc.comm.NXTConnector.connectTo(	at	at lejos.pc.comm.NXTCommandConnector.getSingletonOpen(	at lejos.nxt.Motor.(	at	at org.ros.internal.node.DefaultNode$	at org.ros.internal.node.DefaultNode$	at org.ros.concurrent.ListenerCollection$	at java.util.concurrent.ThreadPoolExecutor.runWorker(	at java.util.concurrent.ThreadPoolExecutor$	at