Ndtyjky

EDITED on 14.11.2018:

I would like to simplify my question, how can I receive a click event in the activity from the Fragment which contains a recycler-view and it has an adapter which handels the click event?

The application looks the following:

I am working on an application which is using BLE service (based on the Google BLE example). I have a DeviceScanActivity which is successfully able to search and connects to BLE periphery, this activity starts a new activity, DeviceControlActivity and I bind the BLE service to it:

@Override

protected void onStart() {

    super.onStart();

    Log.d(TAG, "onStart: bind Service. " + mServiceConnection);

    Intent gattServiceIntent = new Intent(this, BluetoothLeService.class);

    bindService(gattServiceIntent, mServiceConnection, BIND_AUTO_CREATE);

}

In this activity I am able to send values/messages to the BLE periphery.

My application has another activity, ManualModeActivity.
When I start this activity I unbind the BLE service first in case of DeviceControlActivity:

@Override

protected void onStop() {

    super.onStop();

    Log.d(TAG, "onStop: BLE Service is unbind " + mServiceConnection);

    unbindService(mServiceConnection);

    BLEServiceBonded = false;

}

Then in the newly started activity (ManualModeActivity) I bind the BLE service to it, like it is done in case of the DeviceControlActivity.

And now starts the problem, or basically I am new in android programming and I do not know what should I do next to use the BLE service in the ManualModeActivity, I am searching since two days, nothing useful is found.

So let see what I am not able to do, or what makes the challenge for me.

The ManualModeActivity has a ViewPage with two tabs, I have created a ManualTabPagerAdapter which extends FragmentStatePagerAdapter, in this adapter I am loading the fragments, e.g. the ManualDeviceFrament. This fragment has RecyclerView, every item in the RecyclerView has a button, to handle the list and button clicks I have created a ManualListAdapter.
And now the challenge, if I click on the button I want to send a BLE message, but the BLE service, mBluetoothLeService is null.
I want to use the following command to send message:

mBluetoothLeService.writeCustomCharacteristic("Hello");

In case of both activities I have the following code to handle the service connection:

    private final ServiceConnection mServiceConnection = new ServiceConnection() {



    @Override

    public void onServiceConnected(ComponentName componentName, IBinder service) {

        mBluetoothLeService = ((BluetoothLeService.LocalBinder) service).getService();

        if (!mBluetoothLeService.initialize()) {

            Log.e(TAG, "Unable to initialize Bluetooth");

            finish();

        }

        mBluetoothLeService.connect(mDeviceAddress);

        BLEServiceBonded = true;

    }

    @Override

    public void onServiceDisconnected(ComponentName componentName) {

        BLEServiceBonded = false;

    }

}

So guys I would like to ask you to tell me some possible solutions, because I did not find any useful stuff, I am a newbee so maybe some basic knowledge is missing. If you need further details, just let me know and I will post it here.

did you bind and unbind the service on ManualModeActivity as well?
and another thing on overriding onStop method it's better to write overridden code first than calling parent function first.
@Override
protected void onStop() {
unbindService(mServiceConnection);
BLEServiceBonded = false;
super.onStop();
Log.d(TAG, "onStop: BLE Service is unbind " + mServiceConnection);
}