How Do I use Bonding Method in Android NRF Blinky ?

[ox00]

I am using this sample https://github.com/NordicSemiconductor/Android-nRF-Blinky . I noticed that when device rotation is changed the device stills connected. 

I changed the nrfBlinky to  using UART. So that it can send & receive data.

 When navigating to other activity or backpress the service is destroyed. But what I don't understand is why when rotating the devices the activity stills connected?

BlinkyViewModel

	// Connection states Connecting, Connected, Disconnecting, Disconnected etc.
	private final MutableLiveData<Boolean> mBondingState= new MutableLiveData<>();
	
		public LiveData<Boolean> getBondingState() {
		return mBondingState;
	}

@Override
	public void onBondingRequired(@NonNull final BluetoothDevice device) {
		// Blinky does not require bonding
		mBondingState.postValue(true);
	}

	@Override
	public void onBonded(@NonNull final BluetoothDevice device) {
		// Blinky does not require bonding
		mBondingState.postValue(true);
	}

	@Override
	public void onBondingFailed(@NonNull final BluetoothDevice device) {
		// Blinky does not require bonding
		mBondingState.postValue(false);
	}
	
	///////////////////////////////////////////////////////////////
	
	BlinkyActivity
	
	
	mViewModel.getBondingState().observe(this, this::onBondingStateChanged);
	
		private void onBondingStateChanged(final boolean connected) {
//		mLed.setEnabled(connected);
		if (!connected) {
			mLed.setChecked(false);
			mButtonState.setText("KETUM");
		}

	}

[Roshan Rajaratnam]

This is because its using android architecture components and the view model here holds the connection. The view model does not get destroyed when rotation changes hence the conection still is available.

[ox00]

But why when I navigate to other activity  the view model is destroyed? I want the connection still connected

[Roshan Rajaratnam]

when you go back from a viewmodel it does get destroyed but if you go in to navigate to anotheror the next activity the previous one will go in to pause and will not get destroyed. May be you are callig disconnect? I remommend reading a little bit abount Android architecture components.

[ox00]

I think I already configured out why. This nrf_blinky is not implemented the bind service so that why it gets destroyed.