MainActivity

----------------------------

package com.example.mapview_real;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.MenuItem;
import android.support.v4.app.NavUtils;
import com.google.android.maps.*;

public class MainActivity extends MapActivity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
  
     MapView map_view = new MapView(this,"0KzJZGuPUdXjPL9IHjETA5NFuHyN3Q9QPx6GNuA");
     map_view = (MapView)findViewById(R.id.mapview);
     map_view.setBuiltInZoomControls(true);
     MapController ctrl = map_view.getController();
     
     GeoPoint pt = new GeoPoint((int)(37*1E5),(int)(126*1E6));
     ctrl.animateTo(pt);
     
     ctrl.setZoom(15);
     
     map_view.setSatellite(true);
     map_view.displayZoomControls(true);
     
     super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @Override
    protected boolean isRouteDisplayed()
    {
   
     return false;
    }
}

-------------------------------------------------

Manifest

----------------------------------------------

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.mapview_real"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
   
    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
      
        <activity
            android:name=".MainActivity"
            android:label="@string/title_activity_main" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <uses-library android:name="com.google.android.maps"></uses-library>
    </application>

</manifest>

-----------------------

activity_main

----------------------------

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <com.google.android.maps.MapView
        android.id="@+id/mapview"
        android.layout_width="fill_parent"
        android.layout_height="fill_parent"
        android.apikey="0KzJZGuPUdXjPL9IHjETA5NFuHyN3Q9QPx6GNuA"
        android.clickable="true"
></com.google.android.maps.MapView>
</RelativeLayout>
---------------------------------------------------------------

log cat

------------------------------------------------------------------

08-05 09:38:58.524: E/AndroidRuntime(625): FATAL EXCEPTION: main
08-05 09:38:58.524: E/AndroidRuntime(625): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mapview_real/com.example.mapview_real.MainActivity}: java.lang.NullPointerException
08-05 09:38:58.524: E/AndroidRuntime(625):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
08-05 09:38:58.524: E/AndroidRuntime(625):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
08-05 09:38:58.524: E/AndroidRuntime(625):  at android.app.ActivityThread.access$600(ActivityThread.java:123)
08-05 09:38:58.524: E/AndroidRuntime(625):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
08-05 09:38:58.524: E/AndroidRuntime(625):  at android.os.Handler.dispatchMessage(Handler.java:99)
08-05 09:38:58.524: E/AndroidRuntime(625):  at android.os.Looper.loop(Looper.java:137)
08-05 09:38:58.524: E/AndroidRuntime(625):  at android.app.ActivityThread.main(ActivityThread.java:4424)
08-05 09:38:58.524: E/AndroidRuntime(625):  at java.lang.reflect.Method.invokeNative(Native Method)
08-05 09:38:58.524: E/AndroidRuntime(625):  at java.lang.reflect.Method.invoke(Method.java:511)
08-05 09:38:58.524: E/AndroidRuntime(625):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
08-05 09:38:58.524: E/AndroidRuntime(625):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
08-05 09:38:58.524: E/AndroidRuntime(625):  at dalvik.system.NativeStart.main(Native Method)
08-05 09:38:58.524: E/AndroidRuntime(625): Caused by: java.lang.NullPointerException
08-05 09:38:58.524: E/AndroidRuntime(625):  at com.google.android.maps.MapActivity.setupMapView(MapActivity.java:400)
08-05 09:38:58.524: E/AndroidRuntime(625):  at com.google.android.maps.MapView.<init>(MapView.java:289)
08-05 09:38:58.524: E/AndroidRuntime(625):  at com.google.android.maps.MapView.<init>(MapView.java:235)
08-05 09:38:58.524: E/AndroidRuntime(625):  at com.example.mapview_real.MainActivity.onCreate(MainActivity.java:18)
08-05 09:38:58.524: E/AndroidRuntime(625):  at android.app.Activity.performCreate(Activity.java:4465)
08-05 09:38:58.524: E/AndroidRuntime(625):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
08-05 09:38:58.524: E/AndroidRuntime(625):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
08-05 09:38:58.524: E/AndroidRuntime(625):  ... 11 more

반나절 고민해봤는데 뭐가 틀린건지 모르겠습니다

조언부탁드립니다(__)