android googleMap使用并在指定的位置下标注

android googleMap使用并在指定的位置上标注

1.使用googleMap 项目必须使用google APIS
2.必须申请key

 	protected void onCreate(Bundle arg0) {			super.onCreate(arg0);	 		setContentView(R.layout.map);			mapView = (MapView)findViewById(R.id.map);			// 设置显示模式	     //  mapView.setTraffic(true);	     mapView.setSatellite(true);//是否卫星模式	     mapView.setStreetView(false);	      //设置缩放模式	     mapView.setBuiltInZoomControls(true);	     GeoPoint geoPoint = new GeoPoint((int)(22.548723*1E6),(int)(113.936591*1E6));	     mapCon=mapView.getController();	     mapCon.setCenter(geoPoint);	     mapCon.setZoom(15);	     Projection projection = mapView.getProjection();	       //进行画布	     List<Overlay> overlays = mapView.getOverlays();	     overlays.add(new MyPostionOverlay(projection,geoPoint ));	   }	

		/** * 主要是画图 将标记位置 * @author Administrator * */public class MyPostionOverlay extends Overlay {	private Projection projection;	private GeoPoint geoPoint; 	public MyPostionOverlay(Projection projection, GeoPoint geoPoint ){		this.projection=projection;		this.geoPoint=geoPoint;	}	@Override	public void draw(Canvas canvas, MapView mapView, boolean shadow) {		super.draw(canvas, mapView, shadow);		//准备园图		Point point = new Point();		Paint paint = new Paint();		paint.setColor(Color.RED);		paint.setAntiAlias(true);		paint.setStyle(Style.FILL);		//经度转像素		projection.toPixels(geoPoint, point);		//将图画到上层		canvas.drawCircle(point.x, point.y, 6.0f, paint); 	}		

布局文件中加入
<com.google.android.maps.MapView
     android:id="@+id/map"
                 android:layout_width="fill_parent"
                 android:layout_height="fill_parent"
                 android:enabled="true"
                 android:clickable="true"
                 android:apiKey="0L96i8AoAKKTN50BsQTVZJDpNM48n34utP2nhTg"/>
                
android:apiKey是申请的key

不要忘记申请权限和导入mapslib
在application标签中加入
<uses-library android:name="com.google.android.maps"/>