无法解析符号SetLayoutManager - Android

Question

我正在尝试为我的一个java类设置视图。我在SetLayoutManager和Linear LayoutManager上收到错误。我是初学者，所以任何帮助都会非常感激。

package com.bignerdranch.android.criminalintent;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;


public class CrimeListFragment extends Fragment {

    private RecyclerView mCrimeRecyclerView;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_crime_list, container, false);

        mCrimeRecyclerView = (RecyclerView) view.findViewById(R.id.crime_recycler_view);
        mCrimeRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

        return view;
    }
}

Answer 1

这样做：

...
mCrimeRecyclerView = (RecyclerView) view.findViewById(R.id.crime_recycler_view);
mCrimeRecyclerView.setHasFixedSize(true);
LinearLayoutManager mL = new LinearLayoutManager(view.getContext());
mCrimeRecyclerView.setLayoutManager(mL);