未调用我的RecyclerView的适配器的方法。

• 只调用了getItemCount()和类Constructor（List不为空，我已经检查过了）。
• 不调用方法onCreateViewHolder()和onBindViewHolder()。
• 我有其他片段在同一活动，使用几乎相同的程序，但他们的工作非常好。
• 我尝试创建一个新的适配器类，但也没有工作。
• 方法getItemCount()被调用2次
• 我正在为2个不同的recyclerview的适配器视图使用相同的XML文件，它们都工作正常。

我的适配器类

public class OfflineAdapter extends RecyclerView.Adapter<OfflineAdapter.OfflineHolder>{
private Context context;
private List<MovieDBObject> list;

public class OfflineHolder extends RecyclerView.ViewHolder {
    @BindView(R.id.movie_grid_imageView)
    ImageView imageView;

    public OfflineHolder(View itemView) {
        super(itemView);
        ButterKnife.bind(this, itemView);
        Log.i("bitmap", String.valueOf(4));
    }
}

public OfflineAdapter (Context context, List<MovieDBObject> list) {
    this.context = context;
    this.list = list;
    Log.i("bitmap", String.valueOf(1));
}

@Override
public OfflineHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.movie_grid_imageview, parent, false);
    Log.i("bitmap", String.valueOf(3));
    return new OfflineHolder(view);
}

@Override
public void onBindViewHolder(OfflineHolder holder, int position) {
    MovieDBObject object = list.get(position);
    holder.imageView.setImageBitmap(object.getPoster());
    Log.i("bitmap", String.valueOf(5));
}

@Override
public int getItemCount() {
    Log.i("bitmap", String.valueOf(2));
    return list.size();
}
}

调用RecyclerView的片段

public class FavouriteMovies extends Fragment{
@BindView(R.id.favourite_movies_recyclerView)
RecyclerView recyclerView;
List<MovieDBObject> list = new ArrayList<>();
MovieDBHelper movieDBHelper;
OfflineAdapter offlineAdapter;

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_fav_movies, container, false);
    ButterKnife.bind(this, rootView);

    movieDBHelper = ((MainActivity)getActivity()).dbHelper;
    final GridLayoutManager layoutManager = new GridLayoutManager(getContext(), 2);

    offlineAdapter = new OfflineAdapter(getContext(), list);
    recyclerView.setAdapter(offlineAdapter);
    recyclerView.setLayoutManager(layoutManager);
    recyclerView.hasFixedSize();
    recyclerView.setItemAnimator(new DefaultItemAnimator());
    prepareList();
    return rootView;
}

private void prepareList(){
    list = movieDBHelper.getAllMovies();
    Log.i("bitmap", list.size()+"");
    offlineAdapter.notifyDataSetChanged();
}
}

片段的XML文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="HELLO"/>

<android.support.v7.widget.RecyclerView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/favourite_movies_recyclerView"/>

</LinearLayout>

适配器视图的XML文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content">

<ImageView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/movie_grid_imageView"/>

</RelativeLayout>