目前百度地图SDK所集成的检索服务包括:POI检索、公交信息查询、线路规划、地理编码、在线建议查询、短串分享。
上篇博客讲解了POI检索和在线建议查询,这篇博客将讲解经常用到的线路规划。
在讲解代码之前先上张效果图:
好了!现在我们上代码,来实现上面的功能(代码中都做了相应的注解)
路线规划检索有三种检索:驾车,步行,公交车!三种实现的步骤基本类似,下面我们就拿一种来做解析(公交车)。
1.首先我们要实例化路线规划检索的实例
// 初始化搜索模块,注册事件监听 mSearch = RoutePlanSearch.newInstance(); mSearch.setOnGetRoutePlanResultListener(this);
@Override public void onGetTransitRouteResult(TransitRouteResult result) { if (result == null || result.error != SearchResult.ERRORNO.NO_ERROR) { Toast.makeText(MainActivity.this, "抱歉,未找到结果", Toast.LENGTH_SHORT) .show(); } if (result.error == SearchResult.ERRORNO.AMBIGUOUS_ROURE_ADDR) { // 起终点或途经点地址有岐义,通过以下接口获取建议查询信息 // result.getSuggestAddrInfo() return; } if (result.error == SearchResult.ERRORNO.NO_ERROR) { nodeIndex = -1; pre_next_id.setVisibility(View.VISIBLE); route = result.getRouteLines().get(0); TransitRouteOverlay overlay = new MyTransitRouteOverlay(mBaiduMap); mBaiduMap.setOnMarkerClickListener(overlay); routeOverlay = overlay; overlay.setData(result.getRouteLines().get(0)); overlay.addToMap(); overlay.zoomToSpan(); } }
3.检索起、终点信息
/** * 发起路线规划搜索示例 * * @param v */ public void Search_RoutePlan_Process(View v) { // 重置浏览节点的路线数据 route = null; pre_next_id.setVisibility(View.INVISIBLE); mBaiduMap.clear(); // 处理搜索按钮响应 EditText editSt = (EditText) findViewById(R.id.start); EditText editEn = (EditText) findViewById(R.id.end); // 设置起终点信息,对于tranist search 来说,城市名无意义 PlanNode stNode = PlanNode.withCityNameAndPlaceName("北京", editSt .getText().toString()); PlanNode enNode = PlanNode.withCityNameAndPlaceName("北京", editEn .getText().toString()); // 实际使用中请对起点终点城市进行正确的设定 if (v.getId() == R.id.drive) { mSearch.drivingSearch((new DrivingRoutePlanOption()).from(stNode) .to(enNode)); } else if (v.getId() == R.id.transit) { mSearch.transitSearch((new TransitRoutePlanOption()).from(stNode) .city("北京").to(enNode)); } else if (v.getId() == R.id.walk) { mSearch.walkingSearch((new WalkingRoutePlanOption()).from(stNode) .to(enNode)); } }
/** * 节点浏览示例 * * @param v */ public void nodeClick(View v) { if (route == null || route.getAllStep() == null) { return; } if (nodeIndex == -1 && v.getId() == R.id.pre) { return; } // 设置节点索引 if (v.getId() == R.id.next) { if (nodeIndex < route.getAllStep().size() - 1) { nodeIndex++; } else { return; } } else if (v.getId() == R.id.pre) { if (nodeIndex > 0) { nodeIndex--; } else { return; } } // 获取节结果信息 LatLng nodeLocation = null; String nodeTitle = null; Object step = route.getAllStep().get(nodeIndex); if (step instanceof DrivingRouteLine.DrivingStep) { nodeLocation = ((DrivingRouteLine.DrivingStep) step).getEntrace() .getLocation(); nodeTitle = ((DrivingRouteLine.DrivingStep) step).getInstructions(); } else if (step instanceof WalkingRouteLine.WalkingStep) { nodeLocation = ((WalkingRouteLine.WalkingStep) step).getEntrace() .getLocation(); nodeTitle = ((WalkingRouteLine.WalkingStep) step).getInstructions(); } else if (step instanceof TransitRouteLine.TransitStep) { nodeLocation = ((TransitRouteLine.TransitStep) step).getEntrace() .getLocation(); nodeTitle = ((TransitRouteLine.TransitStep) step).getInstructions(); } if (nodeLocation == null || nodeTitle == null) { return; } // 移动节点至中心 mBaiduMap.setMapStatus(MapStatusUpdateFactory.newLatLng(nodeLocation)); // show popup popupText = new TextView(MainActivity.this); popupText.setBackgroundResource(R.drawable.popup); popupText.setTextColor(0xFF000000); popupText.setText(nodeTitle); mBaiduMap.showInfoWindow(new InfoWindow(popupText, nodeLocation, 0)); }
5.获取开始和结束坐标
private class MyTransitRouteOverlay extends TransitRouteOverlay { public MyTransitRouteOverlay(BaiduMap baiduMap) { super(baiduMap); } @Override public BitmapDescriptor getStartMarker() {//获取开始坐标 if (useDefaultIcon) { return BitmapDescriptorFactory.fromResource(R.drawable.icon_st); } return null; } @Override public BitmapDescriptor getTerminalMarker() {//获取结束坐标 if (useDefaultIcon) { return BitmapDescriptorFactory.fromResource(R.drawable.icon_en); } return null; } }
mSearch.destroy();好了!关于公交车路线检索讲解完啦!驾车和步行的和公交车路线的差不多,想了解的可以下载源码查看!
本篇博客大家觉得有什么新的想法和建议可以在评论区评论,谢谢!
Android 百度地图 SDK v3_3_0 (六) ---驾车、步行、公交路线搜索
原文地址:http://blog.csdn.net/tanzuai/article/details/43851829