Java代码
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Path;
import android.graphics.Point;
import android.os.Bundle;
import com.baidu.mapapi.BMapManager;
import com.baidu.mapapi.GeoPoint;
import com.baidu.mapapi.MapActivity;
import com.baidu.mapapi.MapController;
import com.baidu.mapapi.MapView;
import com.baidu.mapapi.Overlay;
import com.baidu.mapapi.Projection;

public class BaiduMapActivity extends MapActivity {
private Context mContext;
private MapView mapView;
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
@Override
protected void onCreate(Bundle arg0) {
super.onCreate(arg0);
setContentView(R.layout.baidumap_layout);

BaseApplication baseApp = (BaseApplication) this.getApplication();
if (baseApp.mBMapManage == null) {
baseApp.mBMapManage = new BMapManager(mContext);
baseApp.mBMapManage.init(baseApp.mStrKey,
new BaseApplication.MyGeneralListener());
}
baseApp.mBMapManage.start();
super.initMapActivity(baseApp.mBMapManage);// 初始化map sdk
mapView = (MapView) findViewById(R.id.bmapView);
mapView.setBuiltInZoomControls(true);
// 设置在缩放动画过程中也显示overlay,默认为不绘制
mapView.setDrawOverlayWhenZooming(true);

// RouteLine routeLine =
// (RouteLine)getIntent().getSerializableExtra("routeLine");

//这里画点和连接线
MyOverlay myOverlay = new MyOverlay();
mapView.getOverlays().add(myOverlay);

MapController mapController = mapView.getController();
mapController.zoomIn();

mapController.animateTo(new GeoPoint((int) (2259316 * 10),
(int) (11396279 * 10)));//设置一个起点
}

class MyOverlay extends Overlay {

public void draw(Canvas canvas, MapView mapView, boolean shadow) {
super.draw(canvas, mapView, shadow);
Paint paint = new Paint();
paint.setColor(Color.BLUE);
paint.setDither(true);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeCap(Paint.Cap.ROUND);
paint.setStrokeJoin(Paint.Join.ROUND);
paint.setStrokeWidth(5);
Projection projection = mapView.getProjection();
Point p1 = new Point();
projection.toPixels(gpoint1 = new GeoPoint((int) (2259316 * 10), (int) (11396279 * 10)), p1);
canvas.drawCircle(p1.x, p1.y, projection.metersToEquatorPixels(500), paint);
}
}

}

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