create a connection to a BluetoothLE device using Samsung Galaxy S3

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