map android 使用,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 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

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