val viewModel : TodoListViewModel = ViewModelProviders.of(this).get(TodoListViewModel::class.java)
        viewModel.getAllTasksFromViewModel()?.observe(
                this ,
                Observer {
                    if (it != null) {
                        mTodoTaskAdapters = TodoTaskAdapters(this , it)
                        mTaskRecyclerView.layoutManager = LinearLayoutManager(
                                this.applicationContext ,
                                LinearLayout.VERTICAL , false)
                        mTaskRecyclerView.adapter = mTodoTaskAdapters
                    }
                }
        )