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* Tag for Log
*/
private static final String TAG = "DeviceListActivity";

/**
* Return Intent extra
*/
public static String EXTRA_DEVICE_ADDRESS = "device_address";

/**
* Member fields
*/
private BluetoothAdapter mBtAdapter;

/**
* Newly discovered devices
*/
private ArrayAdapter<String> mNewDevicesArrayAdapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

// Setup the window
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setContentView(R.layout.activity_device_list);

// Set result CANCELED in case the user backs out
setResult(Activity.RESULT_CANCELED);

// Initialize the button to perform device discovery
Button scanButton = (Button) findViewById(R.id.button_scan);
scanButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
doDiscovery();
v.setVisibility(View.GONE);
}
});

// Initialize array adapters. One for already paired devices and
// one for newly discovered devices
ArrayAdapter<String> pairedDevicesArrayAdapter =
new ArrayAdapter<String>(this, R.layout.device_name);
mNewDevicesArrayAdapter = new ArrayAdapter<String>(this, R.layout.device_name);

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