소스자체에는 문제가 없다고 생각합니다..
모토로이 자체에서 돌려봤으나 돌아오는 값이 없는데 이 문제 진단 부탁드립니다.

문제는 가져오는 값이 NULL값이라 에러처리문의 문장이 나오더군요..
구동은 모토로이로 직접.. 구동했습니다..

02-16 21:43:32.936: ERROR/StatusBarPolicy(1317): Modified icon Level=5
02-16 21:47:18.694: ERROR/NetworkStateTracker(1317): net.tcp.buffersize.hsdpa not found in system properties. Using defaults
02-16 22:02:59.678: ERROR/AndroidRuntime(20502): ERROR: thread attach failed
02-16 22:03:01.014: ERROR/AndroidRuntime(20519): ERROR: thread attach failed
02-16 22:03:09.155: ERROR/StatusBarPolicy(1317): Modified icon Level=5
02-16 22:03:11.186: ERROR/StatusBarPolicy(1317): Modified icon Level=4
02-16 22:03:41.717: ERROR/AndroidRuntime(20542): ERROR: thread attach failed
02-16 22:03:42.999: ERROR/AndroidRuntime(20553): ERROR: thread attach failed
02-16 22:03:52.858: ERROR/SUPLJ(1317): Select() returned!!
02-16 22:03:53.053: ERROR/SUPLJ(1317): Select() returned!!
02-16 22:03:53.319: ERROR/SUPLJ(1317): Select() returned!!
02-16 22:03:53.921: ERROR/StatusBarPolicy(1317): Modified icon Level=4



[mainfest에는 퍼미션 줬구요..]
  <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
  <uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION"></uses-permission>
 
[GPS.java]

package com.ex.Gps;
import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
public class Gps extends Activity {
 private LocationManager lm;
 private LocationListener locListenD;
  public TextView tvLatitude;
  public TextView tvLongitude;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
 
        // 텍스트뷰를 찾는다
         tvLatitude = (TextView)findViewById(R.id.tvLatitude);
        tvLongitude = (TextView)findViewById(R.id.tvLongitude);
        
        // LocationListener의 핸들을 얻는다
        lm =(LocationManager)getSystemService(Context.LOCATION_SERVICE);        
        
        //GPS 위치 서비스에 연결한다
        Location loc = lm.getLastKnownLocation("gps");
        
        if(loc!=null) {
         // TextView를 채운다
          tvLatitude.setText(Double.toString(loc.getLatitude()));
         tvLongitude.setText(Double.toString(loc.getLongitude()));         
            // Location Manager에게 위치정보를 업데이트해달라고 요청한다.
            locListenD = new DispLocListener();
            lm.requestLocationUpdates("gps", 30000L, 10.0f, locListenD);           
        }
        else {
         Log.d("location", "location is null");
        }
    }
    private class DispLocListener implements LocationListener {
     public void onLocationChanged(Location location) {
      // TextView를 업데이트 한다.
      tvLatitude.setText(Double.toString(location.getLatitude()));
      tvLongitude.setText(Double.toString(location.getLongitude()));      
     }
     public void onProviderDisabled(String provider) { 
     }
     public void onProviderEnabled(String provider) {
     }
     public void onStatusChanged(String provider, int status, Bundle extras) { 
     }
    }
}
 
 

[main.xml]

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >
<TextView  
 android:id="@+id/lblLatitude"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Latitude:" />
<TextView
 android:id="@+id/tvLatitude"  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" />
<TextView  
 android:id="@+id/lblLongitude"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Longitude:" />
<TextView  
 android:id="@+id/tvLongitude"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content"/>    
</LinearLayout>