package exam.SelfSos;
import java.util.ArrayList;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
 public class Advice extends Activity {
  ArrayList<MyItem> arItem;
  public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.advice);
   
   arItem = new ArrayList<MyItem>();
   MyItem mi;
   mi = new MyItem(R.drawable.timer_image, "타이머 기능");arItem.add(mi);
   mi = new MyItem(R.drawable.siren_image, "사이렌 기능");arItem.add(mi);
   mi = new MyItem(R.drawable.bell_image, "벨소리 기능");arItem.add(mi);
   
   MyListAdapter MyAdapter = new MyListAdapter(this, R.layout.advice_list, arItem);
   
   ListView MyList;
   MyList=(ListView)findViewById(R.id.list);
   MyList.setAdapter(MyAdapter); 
   
   }
  }
 
 
 //리스트 뷰에 출력할 항목
 class MyItem {
  MyItem(int aIcon, String aName) {
   Icon = aIcon;
   Name = aName;
  }
  int Icon;
  String Name;
 }
  
 //어댑터 클래스
 class MyListAdapter extends BaseAdapter {
  Context maincon;
  LayoutInflater Inflater;
  ArrayList<MyItem> arSrc;
  int layout;
  
  public MyListAdapter(Context context, int alayout, ArrayList<MyItem> aarSrc) {
   maincon = context;
   Inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
   arSrc = aarSrc;
   layout = alayout;
  }
 
  public int getCount() {
   return arSrc.size();
  }
 
  public String getItem(int position) {
   return arSrc.get(position).Name;
  }
 
  public long getItemId(int position) {
   return position;
  }
 
  // 각 항목의 뷰 생성
  public View getView(int position, View convertView, ViewGroup parent) {
   final int pos = position;
   if (convertView == null) {
    convertView = Inflater.inflate(layout, parent, false);
   }
   ImageView img = (ImageView)convertView.findViewById(R.id.img);
   img.setImageResource(arSrc.get(position).Icon);
   TextView txt = (TextView)convertView.findViewById(R.id.text);
   txt.setText(arSrc.get(position).Name);
   ImageButton btn = (ImageButton)convertView.findViewById(R.id.btn);
   btn.setOnClickListener(new ImageButton.OnClickListener() {
    public void onClick(View v) {
     
     AlertDialog.Builder bld = new AlertDialog.Builder(Advice.this);
     bld.setTitle("타이머 기능");
     bld.setMessage("타이머 기능은....");
     bld.setIcon(R.drawable.button_image);
     bld.show();
     
    }
   });
   return convertView;
  }
 }

마지막단락 다섯번째줄 

AlertDialog.Builder bld = new AlertDialog.Builder(Advice.this); 에서

No enclosing instance of the type Advice is accessible in scope 이런 오류나 뜨는데 이 오류는 왜 뜨는거죠?
네이버, 구글 등등 다 찾아봐도 모르겠어요 .....
아시는분 답변해주시면 감사하겠습니다!