Android 百度地图 SDK v3_3_0 （六） ---驾车、步行、公交路线搜索

     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);

          2. 创建公交线路规划检索监听者

@Overridepublic 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));}}

           4.节点浏览的实现（就是上一站和下一站）

/** * 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 popuppopupText = 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);}@Overridepublic BitmapDescriptor getStartMarker() {//获取开始坐标if (useDefaultIcon) {return BitmapDescriptorFactory.fromResource(R.drawable.icon_st);}return null;}@Overridepublic BitmapDescriptor getTerminalMarker() {//获取结束坐标if (useDefaultIcon) {return BitmapDescriptorFactory.fromResource(R.drawable.icon_en);}return null;}}

            6.释放检索实例；

        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！

           源码下载地址