与MaterialNavigationDrawer库一起使用时RecyclerView提供空对象引用

Question

我正在尝试使用MaterialNavigationDrawer库。维基上说：

MaterialNavigationDrawer是ActionBarActivity，但有一些重要的更改：

null

public class MainActivity extends MaterialNavigationDrawer implements
        OffersFragment.OnEnterNameFragmentInteractionListener,
        OfferDetailsFragment.OnShowNamesFragmentInteractionListener {

    public static final String TAG = "MainActivity";

    RecyclerView recyclerView;
    LinearLayoutManager linearLayoutManager;

    @Override
    public void init(Bundle bundle) {
        loadSampleData();

        recyclerView = (RecyclerView) findViewById(R.id.rv_offers);
        recyclerView.setHasFixedSize(true);

        linearLayoutManager = new LinearLayoutManager(getApplicationContext());
        recyclerView.setLayoutManager(linearLayoutManager);

        RecyclerViewAdapter rvAdapter = new RecyclerViewAdapter(this, offerList);
        recyclerView.setAdapter(rvAdapter);


        MaterialAccount account = new MaterialAccount(this.getResources(),
                "Akshay","[e-mail]",R.drawable.photo, R.drawable.navbar_header);
        account.setTitle("Title");
        this.addAccount(account);

        MaterialSection section = newSection("Share", R.drawable.ic_share_grey600_24dp, new OffersFragment());
        this.addSection(section);

        MaterialSection settingsSection = newSection("Settings", new OffersFragment());
        this.addBottomSection(settingsSection);
    }
....
....
}

尝试对Android.support.v7.widget.recyclerview.onmeasure（Recyclerview.java:1764)上的空对象引用调用虚拟方法“void android.support.v7.widget.recyclerview$LayoutManager.onmeasure（android.support.v7.widget.recyclerview$recycler,android.support.v7.widget.recyclerview$state,int,int）”

Answer 1

我可以通过引用这个来实现它。现在，我没有在父活动中初始化回收器视图，而是在片段本身中执行该操作，并且它可以工作。