正在学习Tag ，想知道 TabHost tabs = getTabHost?报错

import com.example.mess.next.New;


import android.app.Activity;
import android.content.Intent;
import android.content.res.Resources;
import android.os.Bundle;
import android.view.Menu;
import android.widget.TabHost;


public class MainActivity extends Activity {


@Override
protected void onCreate(Bundle savedInstanceState) {



       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);
       super.onCreate(savedInstanceState);
       setContentView(R.layout.maingai);
               
       TabHost tabs = getTabHost();    错误：The method getTabHost() is undefined for the type MainActivity
       TabHost.TabSpec spec = null;
       //通过Intent，将activity导入，对于intent，这个类不能是内部类，这个类必须在AndroidManifest中注册的类
       Intent intent = new Intent();
       intent.setClass(MainActivity.this,New.class);
       spec = tabs.newTabSpec("Tag1");
       spec.setIndicator("Intent");
       spec.setContent(intent);
       tabs.addTab(spec);
   }