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;}@Overridepublic 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"/>