Android maps google

package br.com.android;

import android.app.Activity;
import android.os.Bundle;

public class MapasSimplesActivity extends MapActivity { \\ erro nesta linha, na MapActivity
   
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main); \\erro aqui nesta linha
        MapView mapView = (MapView) findViewById(R.id.map_view) ;\\erro aqui nesta linha
        mapView.setClickable(true) ;

        MyLocationOverlay mlo = new MyLocationOverlay(this, mapView) ;\\erro aqui esta linha
        mlo.enableCompass() ;
        mlo.enableMyLocation() ;
        mapView.getOverlays().add(mlo) ;
    }
    

	protected boolean isRouteDisplayed() {
        return false;
    }
 }

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 		package="com.example.package.name">
  
  		<application android:name="MyApplication" >
    		<uses-library android:name="com.google.android.maps" />
    		 <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
			<uses-permission android:name="android.permission.INTERNET" />
   
  		</application>
  
 	 </manifest>
   <com.google.android.maps.MapView
       			 android:id="@+id/map_view"
                 android:layout_width="fill_parent"
                 android:layout_height="fill_parent"
                 android:enabled="true"
     			 android:clickable="true"
                 android:apiKey="0eTgDADY1yjQIs-iW_8GO4URsClmWinsKEXd7IQ"
                 />
   
</LinearLayout>