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A few days ago, I downloaded the Bluetooth Smart Scanner software on Google Play Store. After installed it on my Samsung Galaxy S3 phone, I could scan my Bluetooth LE device successfully. Even though I had tried all ways to scan my bluetooth LE device, there was nothing displayed on my computer. So I decompiled this software, there was a startLeDiscovery() method in the package android.bluetooth . But what confused me was that this method didn't exist in my android.jar of android sdk 15. At last, I replaced the BlutoothAdapter.class file and BluetoothDevice.class file of android.jar with them of Bluetooth Smart Scanner software, so that I could successfully call the startLeDiscovery() method in Eclipse. The source code as shown below. public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); IntentFilter intent = new IntentFilter(); intent.addAction(BluetoothDevice.ACTION_FOUND); intent.addAction(BluetoothDevice.EXTRA_UUID); intent.addAction(BluetoothDevice.ACTION_GATT_PRIMARY_UUID); registerReceiver(searchDevices, intent); //bluetooth.discovery(); bluetooth.startLeDiscovery(); } private BroadcastReceiver searchDevices = new BroadcastReceiver() { public void onReceive(Context context, Intent intent) { String action = intent.getAction(); BluetoothDevice device = null; if (BluetoothDevice.ACTION_FOUND.equals(action)) { device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); String msg = device.getName()+"\n"+device.getAddress(); Log.i("hella",msg); bluetooth.cancelDiscovery(); connectDevice(device); } } };` It turned out that I successfully scanned my bluetooth LE device on Galaxy s3 phone

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