package com.GpsEx1;

import java.io.IOException;
import java.util.List;
import java.util.Locale;

import android.app.Activity;
import android.content.Context;
import android.location.Address;
import android.location.Criteria;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class GpsEx1 extends Activity {
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  
  String context = Context.LOCATION_SERVICE;
  
  LocationManager locationManager;
  locationManager = (LocationManager) getSystemService(context);
  
  Criteria criteria = new Criteria();
  criteria.setAccuracy(Criteria.ACCURACY_FINE);
  criteria.setAltitudeRequired(false);
  criteria.setBearingRequired(false);
  criteria.setCostAllowed(true);
  criteria.setPowerRequirement(Criteria.POWER_LOW);

  String provider = locationManager.getBestProvider(criteria, true);
  Location location = locationManager.getLastKnownLocation(provider);
  updateWithNewLocation(location);
  locationManager.requestLocationUpdates(provider, 2000, 10,
    locationListener);

 }
 private void updateWithNewLocation (Location location) {
  
  final String latlongString;
   final TextView myLocationText;
   Button Btn1;
   
   Button Btn2 = (Button)findViewById(R.id.Btn1);
   myLocationText = (TextView) findViewById(R.id.myLocationText);

   String addressString = "No address found";
   

   if (location != null) {
    double lat = location.getLatitude();
    double lng = location.getLongitude();
    latlongString = "위도 : " + lat + "\n경도 : " + lng;
    

    double latitude = location.getLatitude();
    double longitude = location.getLongitude();

    Geocoder gc = new Geocoder(this, Locale.KOREAN);

    try {
     List<Address> addresses = gc.getFromLocation(latitude,
       longitude, 1);
     StringBuilder sb = new StringBuilder();

     if (addresses.size() > 0) {
      Address address = addresses.get(0);
      for (int i = 0; i < address.getMaxAddressLineIndex(); i++)
       sb.append(address.getAddressLine(i)).append("\n");

      sb.append(address.getLocality()).append("\n");
      sb.append(address.getPostalCode()).append("\n");
      sb.append(address.getCountryName()).append("\n");

      
      addressString = sb.toString();
     }

    } catch (IOException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }

   } else {
    latlongString = "location 발견안됨";
   }
   
   myLocationText.setText("당신의 현재 위치는 \n" + "" + "이고 \n\n"
     + "주소는 \n" + "" + "입니다");
   
   Btn2.setOnClickListener(new OnClickListener() {
    
    public void onClick(View main) {
     
     // TODO Auto-generated method stub
     myLocationText.setText("당신의 현재 위치는 \n" + latlongString + "이고 \n\n"
       + "주소는 \n" + addressString + "입니다");
    }
   });
  }

  private final LocationListener locationListener = new LocationListener() {
   public void onLocationChanged(Location location) {
    updateWithNewLocation(location);
   }

   public void onProviderDisabled(String provider) {
    updateWithNewLocation(null);
   }

   public void onProviderEnabled(String provider) {
   }

   public void onStatusChanged(String provider, int status, Bundle extras) {
   }
  };
}

안되는 부분이 
 addressString = sb.toString();   // 1번

 myLocationText.setText("당신의 현재 위치는 \n" + latlongString + "이고 \n\n"
       + "주소는 \n" + addressString + "입니다"); // 2번

1번을 고치면 2번이 오류가납니다.

final 로 픽셀시킬경우그럽니다.