百度地图，定位自己+地图显示（在地图上显示自己当前位置，并覆盖自己的位置）

package com.youtu; 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; import android.location.Location; import android.os.Bundle; public class MapDemo extends MapActivity implements LocationListener { BMapManager mapManager=null; private String key="8FD56A032431F6F3219137C43EEF1E8E3FFF59CB";//CK private MKLocationManager mLocationManager = null; MapView mapview; MyLocationOverlay myLocationOverlay; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //初始化Mapactivity mapManager=new BMapManager(getApplication()); mapManager.init(key,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.mapview); // 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); } protected boolean isRouteDisplayed() { return false; } @Override protected void onDestroy() { if(mapManager!=null){ mapManager.destroy(); mapManager=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(); } @Override public void onLocationChanged(Location location) { if(mLocationManager!=null){ System.out.println("aaaaaaaaaa"); mapview.setBuiltInZoomControls(true); MapController mapcontroller=mapview.getController(); GeoPoint point=new GeoPoint((int)(location.getLatitude()*1E6),(int)(location.getLongitude()*1E6));//设置中心位置 mapcontroller.setCenter(point);//设置中心点 mapcontroller.setZoom(13);//设置缩放值 } } @Override protected boolean isLocationDisplayed() { // TODO Auto-generated method stub return myLocationOverlay.isMyLocationEnabled(); } }