百度地图画轨迹连接线

1. package com.life.hua.activity;  
2. import android.content.Context;  
3. import android.graphics.Canvas;  
4. import android.graphics.Color;  
5. import android.graphics.Paint;  
6. import android.graphics.Paint.Style;  
7. import android.graphics.Path;  
8. import android.graphics.Point;  
9. import android.os.Bundle;  
10. import com.baidu.mapapi.BMapManager;  
11. import com.baidu.mapapi.GeoPoint;  
12. import com.baidu.mapapi.MapActivity;  
13. import com.baidu.mapapi.MapController;  
14. import com.baidu.mapapi.MapView;  
15. import com.baidu.mapapi.Overlay;  
16. import com.baidu.mapapi.Projection;  
17. import com.life.hua.activity.BaseApplication;  
18. import com.life.hua.activity.R;  
19.   
20. public class BaiduMapActivity extends MapActivity {  
21.     private Context mContext;  
22.     private MapView mapView;  
23.     @Override  
24.     protected boolean isRouteDisplayed() {  
25.         // TODO Auto-generated method stub  
26.         return false;  
27.     }  
28.     private GeoPoint gpoint1, gpoint2, gpoint3;// 连线的点  
29.     @Override  
30.     protected void onCreate(Bundle arg0) {  
31.         super.onCreate(arg0);  
32.         setContentView(R.layout.baidumap_layout);  
33.   
34.         BaseApplication baseApp = (BaseApplication) this.getApplication();  
35.         if (baseApp.mBMapManage == null) {  
36.             baseApp.mBMapManage = new BMapManager(mContext);  
37.             baseApp.mBMapManage.init(baseApp.mStrKey,  
38.                     new BaseApplication.MyGeneralListener());  
39.         }  
40.         baseApp.mBMapManage.start();  
41.         super.initMapActivity(baseApp.mBMapManage);// 初始化map sdk  
42.         mapView = (MapView) findViewById(R.id.bmapView);  
43.         mapView.setBuiltInZoomControls(true);  
44.         // 设置在缩放动画过程中也显示overlay,默认为不绘制  
45.         mapView.setDrawOverlayWhenZooming(true);  
46.   
47.         // RouteLine routeLine =  
48.         // (RouteLine)getIntent().getSerializableExtra("routeLine");  
49.   
50.         //这里画点和连接线  
51.         MyOverlay myOverlay = new MyOverlay();  
52.         mapView.getOverlays().add(myOverlay);  
53.           
54.         MapController mapController = mapView.getController();  
55.         mapController.zoomIn();  
56.           
57.         gpoint1 = new GeoPoint((int) (2259316 * 10),  
58.                 (int) (11396279 * 10));  
59.         gpoint2 = new GeoPoint((int) (2259245 * 10),  
60.                 (int) (11396226 * 10));  
61.         gpoint3 = new GeoPoint((int) (2259121 * 10),  
62.                 (int) (11396066 * 10));       
63.         mapController.animateTo(gpoint1);//设置一个起点  
64.     }  
65.   
66.     class MyOverlay extends Overlay {  
67.   
68.         @Override  
69.         public void draw(Canvas canvas, MapView mapView, boolean shadow) {  
70.             super.draw(canvas, mapView, shadow);  
71.               
72.             Projection projection = mapView.getProjection();  
73.             Point p1 = new Point();  
74.             Point p2 = new Point();  
75.             Point p3 = new Point();  
76.             // 经度转像素  
77.             projection.toPixels(gpoint1, p1);  
78.             projection.toPixels(gpoint2, p2);  
79.             projection.toPixels(gpoint3, p3);  
80.           
81.             //第一个画笔 画圆  
82.             Paint fillPaint = new Paint();  
83.             fillPaint.setColor(Color.BLUE);  
84.             fillPaint.setAntiAlias(true);  
85.             fillPaint.setStyle(Style.FILL);  
86.               
87.             // 将图画到上层  
88.             canvas.drawCircle(p1.x, p1.y, 5.0f, fillPaint);  
89.             canvas.drawCircle(p2.x, p2.y, 5.0f, fillPaint);  
90.             canvas.drawCircle(p3.x, p3.y, 5.0f, fillPaint);  
91.   
92.             //第二个画笔 画线  
93.             Paint paint = new Paint();  
94.             paint.setColor(Color.BLUE);  
95.             paint.setDither(true);  
96.             paint.setStyle(Paint.Style.STROKE);  
97.             paint.setStrokeJoin(Paint.Join.ROUND);  
98.             paint.setStrokeCap(Paint.Cap.ROUND);  
99.             paint.setStrokeWidth(4);  
100.   
101.             //连接  
102.             Path path = new Path();  
103.             path.moveTo(p1.x, p1.y);  
104.             path.lineTo(p2.x, p2.y);  
105.             path.lineTo(p3.x, p3.y);  
106.             //画出路径  
107.             canvas.drawPath(path, paint);  
108.         }  
109.     }  
110.   
111. }