Question

我得到的是异常 -

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)

我添加了以下代码，但是我仍然遇到此异常 -

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

如果删除回收站视图中的内容，则没有例外。

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，但他们不应该是RecyclerView的孩子。

Answer 2

mDrawerList.setHasFixedSize(true);
LinearLayoutManager llm = new LinearLayoutManager(getActivity());
llm.setOrientation(LinearLayoutManager.VERTICAL);
mDrawerList.setLayoutManager(llm);

在setHasFixedSize()语句之前LayoutManager为我解决了问题。

java.lang.IllegalStateException：RecyclerView没有LayoutManager

2 个答案: