使用GPS实时记录运动路线

使用GPS实时记录运动路线,没有经过真机测试但是理论上应该没问题 等有流量后进行一下性能测试

主要思路就是使用list实时记录运动坐标 , 继承 Overlay，并重写draw方法，在draw方法中通过list的数值画出path。

首先声明list

private List<GeoPoint> gPointList = new ArrayList<GeoPoint>();继承Overlay

<span style="font-size:16px;">class MyOverlay extends Overlay { @Override public void draw(Canvas canvas, MapView mapView, boolean shadow) { // TODO Auto-generated method stub super.draw(canvas, mapView, shadow); //Log.i(TAG, "draw");地图变化时候不断重绘 // 画笔 Paint paint = new Paint(); paint.setColor(Color.RED); paint.setDither(true); paint.setStyle(Paint.Style.STROKE); paint.setStrokeJoin(Paint.Join.ROUND); paint.setStrokeCap(Paint.Cap.ROUND); paint.setStrokeWidth(2); Projection projection = mapView.getProjection(); Path path = new Path(); if (gPointList.size()>1) {//2 Point p1 = new Point(); projection.toPixels(gPointList.get(0), p1); path.moveTo(p1.x, p1.y); for (int i = 0; i < gPointList.size()-1; i++) { Point p2 = new Point(); projection.toPixels(gPointList.get(i+1), p2); path.lineTo(p2.x, p2.y); Log.i(TAG, ""+p2.x+""+p2.y); } canvas.drawPath(path, paint);// 画出路径 } } } </span>

显示在map上

//绘制路径

gpoint1 = new GeoPoint((int) (lat * 1000000), (int) (lng * 1000000)); gPointList.add(gpoint1); myOverlay = new MyOverlay(); overlays.add(myOverlay);

4月20日 发现 如果放到线程里 貌似更好 可以设置多少时间取样

class ThreadGetRoute implements Runnable { public void run() { try { gpoint1 = new GeoPoint((int) (lat * 1000000), (int) (lng * 1000000)); gPointList.add(gpoint1); myOverlay = new MyOverlay(); overlays.add(myOverlay); Thread.sleep(10000); } catch (Exception e) { e.printStackTrace(); } } }