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