CC2650STK: Android Application - can not connect with SensorTag due to BluetoothLeService null

Hi,

I am developing my own app for the CC2650 STK in Android Studio. To do this I've downloaded the Android Source Code from git.

However this is a version from 2015. Is there a newer one anywhere?

I have adapted the code slightly and the scanning for devices works fine. If I want to connect to the device, I get an error, saying that my BluetoothLeService is a null object, when I try to call the connect method. I don't really understand as I have the same code that is used in the Android source code from TI.

Did anyone have a similar problem before?

This is my onConnect() method, which is called from my MainActivity

void onConnect() {
    if (mNumDevs > 0) {

        int connState = btManager.getConnectionState(mBluetoothDevice,
                BluetoothGatt.GATT);

        switch (connState) {
            case BluetoothGatt.STATE_CONNECTED:
                mBluetoothLeService.disconnect(null);
                break;
            case BluetoothGatt.STATE_DISCONNECTED:
                boolean ok = mBluetoothLeService.connect(mBluetoothDevice.getAddress());
                if (!ok) {
                    setError("Connect failed");
                }
                break;
            default:
                setError("Device busy (connecting/disconnecting)");
                break;
        }
    }
}

Thank you for you help!
Best, Claudia