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小编给大家分享一下百度地图如何实现小车规划路线后平滑移动功能,希望大家阅读完这篇文章之后都有所收获,下面让我们一起去探讨吧!
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实现效果
代码下载
下载链接
下面是实现的关键步骤
集成百度地图
怎么集成自然是看百度地图开发平台提供的文档。
文档连接
规划线路
看百度地图的文档,写一个规划线路的工具类(驾车的)
package com.wzhx.car_smooth_move_demo.utils; import android.util.Log; import com.baidu.mapapi.search.route.BikingRouteResult; import com.baidu.mapapi.search.route.DrivingRoutePlanOption; import com.baidu.mapapi.search.route.DrivingRouteResult; import com.baidu.mapapi.search.route.IndoorRouteResult; import com.baidu.mapapi.search.route.MassTransitRouteResult; import com.baidu.mapapi.search.route.OnGetRoutePlanResultListener; import com.baidu.mapapi.search.route.PlanNode; import com.baidu.mapapi.search.route.RoutePlanSearch; import com.baidu.mapapi.search.route.TransitRouteResult; import com.baidu.mapapi.search.route.WalkingRouteResult; import com.wzhx.car_smooth_move_demo.listener.OnGetDrivingResultListener; public class RoutePlanUtil { private RoutePlanSearch mRoutePlanSearch = RoutePlanSearch.newInstance(); private OnGetDrivingResultListener getDrivingResultListener; private OnGetRoutePlanResultListener getRoutePlanResultListener = new OnGetRoutePlanResultListener() { @Override public void onGetWalkingRouteResult(WalkingRouteResult walkingRouteResult) { } @Override public void onGetTransitRouteResult(TransitRouteResult transitRouteResult) { } @Override public void onGetMassTransitRouteResult(MassTransitRouteResult massTransitRouteResult) { } @Override public void onGetDrivingRouteResult(DrivingRouteResult drivingRouteResult) { Log.e("测试", drivingRouteResult.error + ":" + drivingRouteResult.status); getDrivingResultListener.onSuccess(drivingRouteResult); } @Override public void onGetIndoorRouteResult(IndoorRouteResult indoorRouteResult) { } @Override public void onGetBikingRouteResult(BikingRouteResult bikingRouteResult) { } }; public RoutePlanUtil(OnGetDrivingResultListener getDrivingResultListener) { this.getDrivingResultListener = getDrivingResultListener; this.mRoutePlanSearch.setOnGetRoutePlanResultListener(this.getRoutePlanResultListener); } public void routePlan(PlanNode startNode, PlanNode endNode){ mRoutePlanSearch.drivingSearch((new DrivingRoutePlanOption()) .from(startNode).to(endNode) .policy(DrivingRoutePlanOption.DrivingPolicy.ECAR_TIME_FIRST) .trafficPolicy(DrivingRoutePlanOption.DrivingTrafficPolicy.ROUTE_PATH_AND_TRAFFIC)); } }
规划线路后需要将实时路况索引保存,为后面画图需要
// 设置路段实时路况索引 ListallStep = selectedRouteLine.getAllStep(); mTrafficTextureIndexList.clear(); for (int j = 0; j < allStep.size(); j++) { if (allStep.get(j).getTrafficList() != null && allStep.get(j).getTrafficList().length > 0) { for (int k = 0; k < allStep.get(j).getTrafficList().length; k++) { mTrafficTextureIndexList.add(allStep.get(j).getTrafficList()[k]); } } }
要将路线规划的路线上的路段再细分(切割),这样小车移动才会平滑
/** * 将规划好的路线点进行截取 * 参考百度给的小车平滑轨迹移动demo实现。(循环的算法不太懂) * @param routeLine * @param distance * @return */ private ArrayListdivideRouteLine(ArrayList routeLine, double distance) { // 截取后的路线点的结果集 ArrayList result = new ArrayList<>(); mNewTrafficTextureIndexList.clear(); for (int i = 0; i < routeLine.size() - 1; i++) { final LatLng startPoint = routeLine.get(i); final LatLng endPoint = routeLine.get(i + 1); double slope = getSlope(startPoint, endPoint); // 是不是正向的标示 boolean isYReverse = (startPoint.latitude > endPoint.latitude); boolean isXReverse = (startPoint.longitude > endPoint.longitude); double intercept = getInterception(slope, startPoint); double xMoveDistance = isXReverse ? getXMoveDistance(slope, distance) : -1 * getXMoveDistance(slope, distance); double yMoveDistance = isYReverse ? getYMoveDistance(slope, distance) : -1 * getYMoveDistance(slope, distance); ArrayList temp1 = new ArrayList<>(); for (double j = startPoint.latitude, k = startPoint.longitude; !((j > endPoint.latitude) ^ isYReverse) && !((k > endPoint.longitude) ^ isXReverse); ) { LatLng latLng = null; if (slope == Double.MAX_VALUE) { latLng = new LatLng(j, k); j = j - yMoveDistance; } else if (slope == 0.0) { latLng = new LatLng(j, k - xMoveDistance); k = k - xMoveDistance; } else { latLng = new LatLng(j, (j - intercept) / slope); j = j - yMoveDistance; } final LatLng finalLatLng = latLng; if (finalLatLng.latitude == 0 && finalLatLng.longitude == 0) { continue; } mNewTrafficTextureIndexList.add(mTrafficTextureIndexList.get(i)); temp1.add(finalLatLng); } result.addAll(temp1); if (i == routeLine.size() - 2) { result.add(endPoint); // 终点 } } return result; }
最后是开启子线程,对小车状态进行更新(车头方向和小车位置)
/** * 循环进行移动逻辑 */ public void moveLooper() { moveThread = new Thread() { public void run() { Thread thisThread = Thread.currentThread(); while (!exit) { for (int i = 0; i < latLngs.size() - 1; ) { if (exit) { break; } for (int p = 0; p < latLngs.size() - 1; p++) { // 这是更新索引的条件,这里总是为true // 实际情况可以是:当前误差小于5米 DistanceUtil.getDistance(mCurrentLatLng, latLngs.get(p)) <= 5) // mCurrentLatLng 这个小车的当前位置得自行获取得到 if (true) { // 实际情况的索引更新 mIndex = p; mIndex++; // 模拟就是每次加1 runOnUiThread(new Runnable() { @Override public void run() { Toast.makeText(mContext, "当前索引:" + mIndex, Toast.LENGTH_SHORT).show(); } }); break; } } // 改变循环条件 i = mIndex + 1; if (mIndex >= latLngs.size() - 1) { exit = true; break; } // 擦除走过的路线 int len = mNewTrafficTextureIndexList.subList(mIndex, mNewTrafficTextureIndexList.size()).size(); Integer[] integers = mNewTrafficTextureIndexList.subList(mIndex, mNewTrafficTextureIndexList.size()).toArray(new Integer[len]); int[] index = new int[integers.length]; for (int x = 0; x < integers.length; x++) { index[x] = integers[x]; } if (index.length > 0) { mPolyline.setIndexs(index); mPolyline.setPoints(latLngs.subList(mIndex, latLngs.size())); } // 这里是小车的当前点和下一个点,用于确定车头方向 final LatLng startPoint = latLngs.get(mIndex); final LatLng endPoint = latLngs.get(mIndex + 1); mHandler.post(new Runnable() { @Override public void run() { // 更新小车的位置和车头的角度 if (mMapView == null) { return; } mMoveMarker.setPosition(startPoint); mMoveMarker.setRotate((float) getAngle(startPoint, endPoint)); } }); try { // 控制线程更新时间间隔 thisThread.sleep(TIME_INTERVAL); } catch (InterruptedException e) { e.printStackTrace(); } } } } }; // 启动线程 moveThread.start(); }
看完了这篇文章,相信你对“百度地图如何实现小车规划路线后平滑移动功能”有了一定的了解,如果想了解更多相关知识,欢迎关注创新互联行业资讯频道,感谢各位的阅读!