BlueToothHelper

void registerBlueToothReceiver()

Register the receiver for bluetooth status broadcast.

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void unregisterBlueToothReceiver()

Unregister the receiver for bluetooth status broadcast.

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String getContentDevice()

Get the name of connected bluetooth device.
return:
name of connected bluetooth.

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String getBlueToothMac() (*)

Get MAC address of connected bluetooth.
return:
bluetooth MAC address, e.g. 22:22:86:2A:22:E7

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