TodoListViewModel.kt

class TodoListViewModel : AndroidViewModel {

    private var  mTodoTaskList : LiveData<List<TodoTask>> ?= null

    constructor(application: Application) : super(application) {
        val appDatabase : AppDatabase? = AppDatabase.getInstance(this.getApplication())
        mTodoTaskList = appDatabase?.todoTaskDao()?.getallTasks()
    }

    fun getAllTasksFromViewModel() : LiveData<List<TodoTask>>? {
        return mTodoTaskList
    }

}