<?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"   >   <com.baidu.mapapi.MapView Android:id="@+id/map_View"   Android:layout_width="fill_parent"   Android:layout_height="fill_parent"   Android:clickable="true"   />
</LinearLayout>

package com.liufeng.baidumap;   import Android.location.Location;
import Android.os.Bundle;   import com.baidu.mapapi.BMapManager;
import com.baidu.mapapi.GeoPoint;
import com.baidu.mapapi.LocationListener;
import com.baidu.mapapi.MKLocationManager;
import com.baidu.mapapi.MapActivity;
import com.baidu.mapapi.MapController;
import com.baidu.mapapi.MapView;
import com.baidu.mapapi.MyLocationOverlay;   /**  * 创建Activity（继承com.baidu.mapapi.MapActivity）  *   * @author liufeng  * @date 2011-05-02  */
public class MyLocationActivity extends MapActivity implements LocationListener {   private BMapManager mapManager;   private MKLocationManager mLocationManager = null;   private MyLocationOverlay myLocationOverlay;   private MapView mapView;   private MapController mapController;   @Override   public void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.main);   // 初始化MapActivity    mapManager = new BMapManager(getApplication());   // init方法的第一个参数需填入申请的API Key    mapManager.init("285B415EBAB2A92293E85502150ADA7F03C777C4", null);   super.initMapActivity(mapManager);   mLocationManager = mapManager.getLocationManager();   // 注册位置更新事件    mLocationManager.requestLocationUpdates(this);   // 使用GPS定位    mLocationManager.enableProvider((int) MKLocationManager.MK_GPS_PROVIDER);   mapView = (MapView) findViewById(R.id.map_View);   // 设置地图模式为交通地图    mapView.setTraffic(true);   // 设置启用内置的缩放控件    mapView.setBuiltInZoomControls(true);   // 构造一个经纬度点    GeoPoint point = new GeoPoint((int) (26.597239 * 1E6), (int) (106.720397 * 1E6));   // 取得地图控制器对象，用于控制MapView    mapController = mapView.getController();   // 设置地图的中心    mapController.setCenter(point);   // 设置地图默认的缩放级别    mapController.setZoom(7);   // 添加定位图层    myLocationOverlay = new MyLocationOverlay(this, mapView);   // 注册GPS位置更新的事件,让地图能实时显示当前位置    myLocationOverlay.enableMyLocation();   // 开启磁场感应传感器    myLocationOverlay.enableCompass();   mapView.getOverlays().add(myLocationOverlay);   }   @Override   protected boolean isRouteDisplayed() {   return false;   }   @Override   protected void onDestroy() {   if (mapManager != null) {   mapManager.destroy();   mapManager = null;   }   mLocationManager = null;   super.onDestroy();   }   @Override   protected void onPause() {   if (mapManager != null) {   mapManager.stop();   }   super.onPause();   }   @Override   protected void onResume() {   if (mapManager != null) {   mapManager.start();   }   super.onResume();   }   /**  * 根据MyLocationOverlay配置的属性确定是否在地图上显示当前位置  */   @Override   protected boolean isLocationDisplayed() {   return myLocationOverlay.isMyLocationEnabled();   }   /**  * 当位置发生变化时触发此方法  *   * @param location 当前位置  */   @Override   public void onLocationChanged(Location location) {   if (location != null) {   // 将当前位置转换成地理坐标点    final GeoPoint pt = new GeoPoint((int) (location.getLatitude() * 1000000), (int) (location.getLongitude() * 1000000));   // 将当前位置设置为地图的中心    mapController.setCenter(pt);   }   }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:Android="http://schemas.android.com/apk/res/android"   package="com.liufeng.baidumap"   Android:versionCode="1"   Android:versionName="1.0">   <application Android:icon="@drawable/icon" android:label="@string/app_name">   <activity Android:name=".MyLocationActivity" android:label="@string/app_name">   <intent-filter>   <action Android:name="android.intent.action.MAIN" />   <category Android:name="android.intent.category.LAUNCHER" />   </intent-filter>   </activity>   </application>   <uses-sdk Android:minSdkVersion="4" />   <!-- 访问网络的权限 -->   <uses-permission Android:name="android.permission.INTERNET" />   <!-- 访问精确位置的权限 -->   <uses-permission Android:name="android.permission.ACCESS_FINE_LOCATION" />   <!-- 访问网络状态的权限 -->   <uses-permission Android:name="android.permission.ACCESS_NETWORK_STATE" />   <!-- 访问WIFI网络状态的权限 -->   <uses-permission Android:name="android.permission.ACCESS_WIFI_STATE" />   <!-- 改变WIFI网络状态的权限 -->   <uses-permission Android:name="android.permission.CHANGE_WIFI_STATE" />   <!-- 读写存储卡的权限 -->   <uses-permission Android:name="android.permission.WRITE_EXTERNAL_STORAGE" />   <!-- 读取电话状态的权限 -->   <uses-permission Android:name="android.permission.READ_PHONE_STATE" />
</manifest>