为什么 DividerItemDecoration 在 recyclerView 片段中获得空对象引用？

Question

So i try to show my data from local database in recyclerView in HomeFragment, but when I start my app this getting error like this : Attempt to invoke virtual method 'void androidx.recyclerview.widget.RecyclerView.addItemDecoration(androidx.recyclerview.widget.RecyclerView$ItemDecoration)' on a null object reference at org.d3ifcool.tasksreminder.ui.home.HomeFragment.onCreateView(HomeFragment.kt:50)

this is my AddTaskAdapter

AddTaskViewModel

HomeFragment

Answer 1

Your recyclerView object is null . Since you have implemented binding you should use your binding object. Also, move your code to onViewCreated(View, Bundle?) as you will want your view to have been created when you reference a view object

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)
    
    ...
    binding.recyclerView.addItemDecoration(...)
}