1.检查 RecyclerView 是否已经正确初始化。

2.检查 RecyclerView.Adapter 是否已经正确初始化。

3.检查 RecyclerView.Adapter 中的数据是否已经正确赋值。

示例代码：

//获取 RecyclerView RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view);

//初始化 LayoutManager 和 Adapter recyclerView.setLayoutManager(new LinearLayoutManager(this)); MyAdapter adapter = new MyAdapter(dataList);

//设置 Adapter recyclerView.setAdapter(adapter); //这一行可能会报 null reference 错误

//MyAdapter 类 public class MyAdapter extends RecyclerView.Adapter { private List mDataList;

public MyAdapter(List dataList) {
    mDataList = dataList;
}

@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.item_view, parent, false);
    return new MyViewHolder(itemView);
}

@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
    holder.textView.setText(mDataList.get(position));
}

@Override
public int getItemCount() {
    return mDataList.size();
}

}