java.lang.IllegalStateException: RecyclerView has no LayoutManager

问题

I am getting below exception-

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)

I have added the following code,however i am still getting this exception-

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

If I remove the content inside recycler view then there is no exception.

回答1:

Remove the child elements from RecyclerView in your layout file. I don't know what those are supposed to be, but they are not supposed to be children of the RecyclerView.

回答2:

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

Having setHasFixedSize() before the LayoutManager statement fixed the issue for me.

来源：https://stackoverflow.com/questions/30123080/java-lang-illegalstateexception-recyclerview-has-no-layoutmanager

标签

android

navigation-drawer

android-recyclerview