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轨迹平滑处理示例

Java 100.00%

android-path-smooth's Introduction

android-path-smooth

轨迹平滑处理示例

本工程为基于高德地图Android SDK进行封装，实现了定位轨迹的平滑优化处理。

前述

高德官网申请Key.
阅读参考手册.
工程基于Android 3D地图SDK实现

功能描述

基于3D地图SDK，对真实轨迹进行处理，实现去噪、平滑和抽稀。

效果展示

原始轨迹和处理后轨迹

扫一扫安装

使用方法

1:配置搭建AndroidSDK工程

2:实现方法

// 获取轨迹坐标点
List<LatLng> mOriginList = new ArrayList<LatLng>();

PathSmoothTool mpathSmoothTool = new PathSmoothTool();
//设置平滑处理的等级
mpathSmoothTool.setIntensity(4);
List<LatLng> pathoptimizeList = mpathSmoothTool.pathOptimize(originlist);
//绘制轨迹，移动地图显示
if (mOriginList != null && mOriginList.size()>0) {
    mOriginPolyline = amap.addPolyline(new PolylineOptions().addAll(mOriginList).color(Color.GREEN));
    amap.moveCamera(CameraUpdateFactory.newLatLngBounds(getBounds(mOriginList), 200));
}

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android-path-smooth's Issues

Could not find com.android.tools.build:aapt2:3.4.1-5326820.

IDE: android studio 3.4.1
OS: ubuntu 16.04
Build error information:
Could not find com.android.tools.build:aapt2:3.4.1-5326820.
Searched in the following locations:

可以实时的对将轨迹进行平滑处理吗

method calculateDistanceFromPoint() seems not look like Point to line distance

/**
 * 计算当前点到线的垂线距离
 * @param p 当前点
 * @param lineBegin 线的起点
 * @param lineEnd 线的终点
 *
 */
private static double calculateDistanceFromPoint(LatLng p, LatLng lineBegin,
                                  LatLng lineEnd) {
    double A = p.longitude - lineBegin.longitude;
    double B = p.latitude - lineBegin.latitude;
    double C = lineEnd.longitude - lineBegin.longitude;
    double D = lineEnd.latitude - lineBegin.latitude;

    double dot = A * C + B * D;
    double len_sq = C * C + D * D;
    double param = dot / len_sq;

    double xx, yy;

    if (param < 0 || (lineBegin.longitude == lineEnd.longitude
            && lineBegin.latitude == lineEnd.latitude)) {
        xx = lineBegin.longitude;
        yy = lineBegin.latitude;

// return -1;
} else if (param > 1) {
xx = lineEnd.longitude;
yy = lineEnd.latitude;
// return -1;
} else {
xx = lineBegin.longitude + param * C;
yy = lineBegin.latitude + param * D;
}
return AMapUtils.calculateLineDistance(p,new LatLng(yy,xx));
}

public static float calculateLineDistance(LatLng var0, LatLng var1) {
    if (var0 != null && var1 != null) {
        try {
            double var2 = var0.longitude;
            double var4 = var0.latitude;
            double var6 = var1.longitude;
            double var8 = var1.latitude;
            var2 *= 0.01745329251994329D;
            var4 *= 0.01745329251994329D;
            var6 *= 0.01745329251994329D;
            var8 *= 0.01745329251994329D;
            double var10 = Math.sin(var2);
            double var12 = Math.sin(var4);
            double var14 = Math.cos(var2);
            double var16 = Math.cos(var4);
            double var18 = Math.sin(var6);
            double var20 = Math.sin(var8);
            double var22 = Math.cos(var6);
            double var24 = Math.cos(var8);
            double[] var26 = new double[3];
            double[] var27 = new double[3];
            var26[0] = var16 * var14;
            var26[1] = var16 * var10;
            var26[2] = var12;
            var27[0] = var24 * var22;
            var27[1] = var24 * var18;
            var27[2] = var20;
            double var28 = Math.sqrt((var26[0] - var27[0]) * (var26[0] - var27[0]) + (var26[1] - var27[1]) * (var26[1] - var27[1]) + (var26[2] - var27[2]) * (var26[2] - var27[2]));
            return (float)(Math.asin(var28 / 2.0D) * 1.27420015798544E7D);
        } catch (Throwable var30) {
            var30.printStackTrace();
            return 0.0F;
        }
    } else {
        try {
            throw new AMapException("非法坐标值");
        } catch (AMapException var31) {
            var31.printStackTrace();
            return 0.0F;
        }
    }
}