android - 快速 fragment 切换 View 绑定(bind) null

Question

我在选项卡布局中有 2 个 fragment ，它们之间的快速切换会导致 View 返回为空，使用 ViewBinding。这是因为构建 FragmentXBinding 类的延迟吗？
用法示例:

chatadapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
            @Override
            public void onItemRangeInserted(int positionStart, int itemCount) {
                binding.chatRecyclerView.smoothScrollToPosition(0);
            }
        });

错误:

java.lang.NullPointerException: Attempt to read from field 'androidx.recyclerview.widget.RecyclerView com.iku.databinding.FragmentChatBinding.chatRecyclerView' on a null object reference

Answer 1

fragment X

 FragmentXBinding binding;


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    binding = FragmentChatBinding.inflate(inflater, container, false);
    init();
    return binding.getRoot();
}

 private void init() {
    // all initialization 
}

这有助于我用空引用解决我的错误