What is the purpose of Android Bluetooth package?

Android platform includes support for the Bluetooth framework that allows a device to wirelessly exchange data with other Bluetooth devices . Android provides Bluetooth API to perform these different operations. Android provides BluetoothAdapter class to communicate with Bluetooth.

To clear your cache:

Android Bluetooth Helper Library allows you to access the Bluetooth of your mobile device, manage turn-on/off, and discover bluetooth devices around you .

A list of paired devices can be obtained by invoking the getBondedDevices() method, which returns a set of BluetoothDevice objects. We invoke the getBondedDevices() method in the DeviceListFragment ‘s onCreate() method.