android - java.lang.IllegalStateException : RecyclerView has no LayoutManager 错误

Question

我低于异常-

Caused by: java.lang.IllegalStateException: RecyclerView has no LayoutManager
            at android.support.v7.widget.RecyclerView.generateLayoutParams(RecyclerView.java:2820)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:757)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
            at com.peoplecloud.app.guggu.NavigationDrawerFragment.onCreateView(NavigationDrawerFragment.java:75)
            at android.app.Fragment.performCreateView(Fragment.java:1700)
            at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:866)
            at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1040)
            at android.app.FragmentManagerImpl.addFragment(FragmentManager.java:1142)
            at android.app.Activity.onCreateView(Activity.java:4803)

我已经添加了下面的代码，但是我仍然得到这个异常-

 LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
    layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
    mDrawerList.setLayoutManager(layoutManager);

如果我删除了回收站 View 中的内容，那么也不异常(exception)。

Answer 1

从布局文件中的 RecyclerView 中删除子元素。我不知道那些应该是什么，但它们不应该是 RecyclerView 的子项。