Ndtyjky

My app uses an android service in which
I create a retrofit instance and make a webservice call, whenever i get a firebase notification.

My app works fine in foreground and background
receives notification and the webservice is also triggered.

But when my app is in kill condition.

I check if the android service is running, if not I start the service and send a broadcast receiver to trigger the webservice call, but i receive the following error.

Caused by: java.lang.NullPointerException: Attempt to invoke virtual
method 'java.lang.Object retrofit2.Retrofit.create(java.lang.Class)'
on a null object reference

Is this because, retrofit instance cannot be created in app kill condition.

how can i fix this?

Thanks in advance

public class FCM_Background extends Service {
private static String urlString;
private static String orderBaseUrl, orderUrl, orderMethod, receiveBaseUrl, receiveUrl, receivedMethod;
private static Context context;

private BroadcastReceiver receiver;

private String orderId;

private ArrayList<Integer> orderid;

DecimalFormat form = new DecimalFormat("#.##");

private Toast toastMessage;

private String paymentType;

private String orderComment;

private String LogTag = FCM_Background.class.getSimpleName();

private SQLiteHelper helper;

public static SQLiteDatabase db;

private String location_id;

private String state;





@Nullable

@Override

public IBinder onBind(Intent intent) {

    return null;

}



@Override

public int onStartCommand(Intent intent, int flags, final int startId) {

    orderid = new ArrayList<Integer>();





    receiver = new BroadcastReceiver() {

        @Override

        public void onReceive(Context context, Intent intent) {

            location_id = MyPreferenceManager.getInstance(getApplicationContext()).getData(Common.LOCATION_ID);

            state = intent.getExtras().getString("FROM");



            fetchJsonDataFromRetrofit();



        }

    };



    registerReceiver(receiver, new IntentFilter(Common.FCM_BROADCAST));



    return super.onStartCommand(intent, flags, startId);



}





public synchronized void fetchJsonDataFromRetrofit() {

    helper = new SQLiteHelper(getApplicationContext());

    db = helper.getWritableDatabase();

    final ApiInterface listApi = new ApiClient().getClient().create(ApiInterface.class);



    Common.validationToken = MyPreferenceManager.getInstance(getApplicationContext()).getData(Common.AUTH_TOKEN);

    if (null == orderBaseUrl || null == orderUrl) {

        orderBaseUrl = MyPreferenceManager.getInstance(this).getData(Common.DOMAIN_NAME);

        orderUrl = "admin/api/orders";

    }

final Call OrderCall = listApi.getOrderDetails(orderBaseUrl, orderUrl, Common.validationToken);

    OrderCall.enqueue(new Callback<OrderView>() {



        @Override

        public void onResponse(Call<OrderView> call, Response<OrderView> response) {





            orderBaseUrl = null;

            orderUrl = null;

            if (response.isSuccessful()) {





                ArrayList<Order> orders = response.body().getOrderList();

                int orderSize = orders != null ? orders.size() : 0;

                String orderType = null;

                String orderCreatedDate = null;



                if (orderSize > 0) {



                    orderDetails(orders, orderType, orderCreatedDate);



                }



            } else {

                ActionOnTokenExpiry(response);

            }

        }



        @Override

        public void onFailure(Call<OrderView> call, Throwable t) {

        }

    });

}