Connect to Bluetooth programmatically

Question

I'm trying to connect programmatically my device to for example on my Headsets... I had KitKat version and all worked perfect (Bluetooth always was connecting without problems autommatically) but since I've updated to Lolipop it doesn't. I'd like to know if there is any way to connect any paired device of my Android phone to Bluetooth when it turns on.

Since now I've this code (gets the Device name and Device Address) because I thought with it I could connect doing something like device.connect(MAC-Address); but it didn't work...

    BluetoothAdapter bluetoothAdapter
    = BluetoothAdapter.getDefaultAdapter();
Set < BluetoothDevice > pairedDevices = bluetoothAdapter.getBondedDevices();
if (pairedDevices.size() > 0) {
    for (BluetoothDevice device: pairedDevices) {
        mDeviceName.add(device.getName());
        mDeviceMAC.add(device.getAddress());

    }
}
bluetoothClass.setDeviceName(mDeviceName);
bluetoothClass.setDeviceMac(mDeviceMAC);

Question

On my MotoG (KitKat) if I turn my Bluetooth it connects autommatically to device (if it's near and paired ofc...) but on my LG G3 I must go to Configuration/Bluetooth/Paired devices/ and there tap the device to connect... and I want to avoid this... should be possible?

---

I would like to know if there is any possibility to connect to specific Bluetooth just adding the Device name or Device MAC... More or less like Android does when I click on my device to connect it connects autommatically... I just want to get that CLICK event. I know that Android should connect autommatically to a paired device but there's any exceptions that doesn not ... the only way to pair it it's doing the click... that's why I'm wondering if it's there a way to do it... I've read and tested kcoppock answer but it still don't work ..

Any suggestion?

EDIT

The main thing that I wanted to do is to connect my Bluetooth autommatically but since I've read on Hey you answer... I figured it out and I know it's an Android bug, so the thing that I would like to do is select the paired devices and then click on the device that I want to connect (Without doing any Intent) and connect it, instead to go Configuration/Bluetooth/.... Btw I've read any answers on StackOverflow and I found something with Sockets are they used to connect Bluetooth?Could be it a solution?

Solution

This is how i made this work using Java Reflection and BluetoothProfile:

Attributes:

private boolean mIsConnect = true;
private BluetoothDevice mDevice;
private BluetoothA2dp mBluetoothA2DP;
private BluetoothHeadset mBluetoothHeadset;
private BluetoothHealth mBluetoothHealth;

Call:

mBluetoothAdapter.getProfileProxy(getApplicationContext() , mProfileListener, BluetoothProfile.A2DP);
mBluetoothAdapter.getProfileProxy(getApplicationContext() , mProfileListener, BluetoothProfile.HEADSET);
mBluetoothAdapter.getProfileProxy(getApplicationContext() , mProfileListener, BluetoothProfile.HEALTH);

Listener:

private BluetoothProfile.ServiceListener mProfileListener = new BluetoothProfile.ServiceListener() {
        public void onServiceConnected(int profile, BluetoothProfile proxy) {
            if (profile == BluetoothProfile.A2DP) {
                mBluetoothA2DP = (BluetoothA2dp) proxy;
                try {
                    if (mIsConnect) {
                        Method connect = BluetoothA2dp.class.getDeclaredMethod("connect", BluetoothDevice.class);
                        connect.setAccessible(true);
                        connect.invoke(mBluetoothA2DP, mDevice);
                    } else {
                        Method disconnect = BluetoothA2dp.class.getDeclaredMethod("disconnect", BluetoothDevice.class);
                        disconnect.setAccessible(true);
                        disconnect.invoke(mBluetoothA2DP, mDevice);
                    }
                }catch (Exception e){
                } finally {
                }
            } else if (profile == BluetoothProfile.HEADSET) {
                mBluetoothHeadset = (BluetoothHeadset) proxy;
                try {
                    if (mIsConnect) {
                        Method connect = BluetoothHeadset.class.getDeclaredMethod("connect", BluetoothDevice.class);
                        connect.setAccessible(true);
                        connect.invoke(mBluetoothHeadset, mDevice);
                    } else {
                        Method disconnect = BluetoothHeadset.class.getDeclaredMethod("disconnect", BluetoothDevice.class);
                        disconnect.setAccessible(true);
                        disconnect.invoke(mBluetoothHeadset, mDevice);
                    }
                }catch (Exception e){
                } finally {
                }
            } else if (profile == BluetoothProfile.HEALTH) {
                mBluetoothHealth = (BluetoothHealth) proxy;
                try {
                    if (mIsConnect) {
                        Method connect = BluetoothHealth.class.getDeclaredMethod("connect", BluetoothDevice.class);
                        connect.setAccessible(true);
                        connect.invoke(mBluetoothHealth, mDevice);
                    } else {
                        Method disconnect = BluetoothHealth.class.getDeclaredMethod("disconnect", BluetoothDevice.class);
                        disconnect.setAccessible(true);
                        disconnect.invoke(mBluetoothHealth, mDevice);
                    }
                }catch (Exception e){
                } finally {
                }
            }
        }
        public void onServiceDisconnected(int profile) {
        }
    };

I hope this helps anyone trying to connect to Bluetooth Audio devices and headsets.

Comments

[Skizo-ozᴉʞS]

I'll take a look when I have time thanks for the answer hexan :)

[Skizo-ozᴉʞS]

If I need some code more to make it works I'll let you know :D

[hexan]

No problem! :) You should just need to set mDevice and mBluetoothAdapter (BluetoothAdapter mBluetoothAdapter). If you need any more help don't hesitate.

[x0a]

Very nice. Thanks. Do you know where we can read about why you need "getDeclaredMethod" rather than calling the methods directly?