Android LocationServices getLastLocation returns 速度为 0

Question

连接上了，我可以得到坐标的经纬度，但是当我做下面的代码时，speed = 0，为什么不能从位置上取速度？

 @Override
public void onLocationChanged(final Location location) {

    Log.i("","geof is s onLocationChanged ENTERED");
    if (LocationServices.FusedLocationApi.getLastLocation(mLocationClient) != null) {

         locEnd = location;
         Log.i("","geof is s speed of locend:" + location.getSpeed());
    }
}

这将永远是我的回应：

03-31 17:43:57.227  31463-31463/nl.hgrams.passenger I/﹕ geof is s speed of locend:0.0

这是我的权限：

   <uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.LOCATION_HARDWARE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_GPS" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<uses-permission android:name="nl.hgrams.passenger.C2D_MESSAGE" />

Answer 1

我不确定这是否是您要查找的内容： https://developer.android.com/reference/android/location/Location.html#getSpeed()

但 getSpeed 的 "normal" 默认为 return 0.0，因为您的位置没有速度（如文档中所示）。

Android LocationServices getLastLocation returns 速度为 0

Android LocationServices getLastLocation returns speed as 0

gps

android

location

location-client

location-services