android recyclerview(int,int) a null reference

Question

package com.tdc.shop.activity;

import java.util.ArrayList;
import java.util.List;

import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;

import com.tdc.adapter.SearcheHotAdapter;
import com.tdc.shop.R;

public class SearcheActivity extends BaseActivity {

private RecyclerView id_recyclerview;
private List<String> mDatas ;
//private SearcheNineAdapter searcheNine;

@Override
int getLayoutId() {
    return R.layout.searcheactivity;
}

@Override
void findView() {
    id_recyclerview =(RecyclerView) findViewById(R.id._recyclerview);
}

@Override
void initView() {
    mDatas =new ArrayList<String>();
String[] mData={"五粮液","茅台","泸州老窖","汾酒","西风","洋河","剑南春","水井坊","拉菲","酒鬼酒","名状","人头马","轩尼诗","奔富"};
for (int i = 0; i < mData.length; i++) {
    mDatas.add(mData[i]);
}

}

@Override
void initData() {
    id_recyclerview.setLayoutManager(new GridLayoutManager(SearcheActivity.this,5));
    id_recyclerview.setAdapter(new SearcheHotAdapter(SearcheActivity.this,mDatas));
}

}
错误截图：

Answer 1

因为程序还没有执行findViewById，就调用recyclerView.setLayoutManager（）。应该是findView的方法没执行，或者在initView后面执行