Bluetooth GATT disconnect onConnectionStateChange not called

Question

I'm trying to implement my own timeout on my bluetooth GATT services by schedule a timer and call BluetoothGatt.disconnect() manually. But the callback is not called like what usually happen if the disconnect is triggered from the remote devices. There is also a log from the BluetoothGatt that the disconnect function is called

D/BluetoothGatt﹕ cancelOpen() - device: 00:07:80:04:1A:5A

and this is my code to disconnect

private void scheduleDisconnect() {
    isTimerRunning = true;
    disconnectTimer = new Timer();
    disconnectTimer.schedule(new TimerTask() {
        @Override
        public void run() {
            isTimerRunning = false;
            disconnect();
        }
    }, 2000);
}

Why is onConnectionStateChange not called? It's working well for another callback and action

Answer 1

Is your disconnect() method closing the connection as well? Only call BluetoothGatt.close() when you are done with the device, or else your callbacks will be unregistered.