Android：Location.distanceTo 无法正常工作？

Posted 2023-04-13

【中文标题】Android：Location.distanceTo 无法正常工作？

【英文标题】：Android : Location.distanceTo not working correctly?

【发布时间】：2010-10-06 14:09:20

【问题描述】：

我在使用Location.distanceTo 方法计算距离时遇到问题。

private class MyLocationOverlay1 extends MyLocationOverlay 
    @Override
    public void drawMyLocation(Canvas canvas, MapView mapView, Location lastFix, GeoPoint myLocation, long when) 
        super.drawMyLocation(canvas,mapView,lastFix,myLocation,when);

        Location bLocation = new Location("reverseGeocoded");
        bLocation.setLatitude(FindList.gpslat);           // Value = 3.294391E7
        bLocation.setLongitude(FindList.gpslong);         // Value = -9.6564615E7
        Location aLocation = new Location("reverseGeocoded");
        aLocation.setLatitude(myLocation.getLatitudeE6());   // Value = 3.2946164E7
        aLocation.setLongitude(myLocation.getLongitudeE6()); // Value = -9.6505141E7
        aLocation.set(aLocation);    // Don't think I need this   
        bLocation.set(bLocation);    // Don't think I need this either

        int distance = (int)aLocation.distanceTo(bLocation);  // Value = 12637795 ???
        String str = " (" + String.valueOf(distance) + " meters)";
    

谁能告诉我为什么我的距离计算结果显示为 12,637,795 米？

【参考方案1】：

你应该修改行：

aLocation.setLatitude(myLocation.getLatitudeE6() / 1e6);
aLocation.setLongitude(myLocation.getLongitudeE6() / 1e6);

并删除行：

aLocation.set(aLocation);
bLocation.set(bLocation);

【讨论】：

谢谢，看来我在其他一些事情（反向地理编码）上遇到了一些问题。