获取的卫星数量从Location对象 [英] Getting the number of satellites from Location object

问题描述

我使用的是GPS提供商和LocationListener.onLocationChanged（地点位置）接收位置修正。
文档说，这Location.getExtras（）包含一个键/值对：

I'm using a GPS provider and LocationListener.onLocationChanged(Location location) to receive location fixes.
Documentation says, that Location.getExtras() contains next key/value pair:

卫星 - 用于推导修复卫星数量

satellites - the number of satellites used to derive the fix

但在实践中我发现了一个空的额外的对象 - 没有任何数据存在
难道这意味着我得到了A-GPS修正，而不是GPS？

but on practice I'm getting an empty extra object - there is no any data there.
Does it means that I'm getting the A-GPS fixes and not GPS?

推荐答案

要获得使用需要实现android.location.GpsStatus.Listener和实施其方法onGpsStatusChanged的GPS引擎卫星的数量。

To get the number of satellites used by the GPS engine you need to implement android.location.GpsStatus.Listener and implement its method onGpsStatusChanged.

示例...

public void onGpsStatusChanged(int event) {
    int satellites = 0;
    int satellitesInFix = 0;
    int timetofix = locationManager.getGpsStatus(null).getTimeToFirstFix();
    Log.i(TAG, "Time to first fix = " + timetofix);
    for (GpsSatellite sat : locationManager.getGpsStatus(null).getSatellites()) {
        if(sat.usedInFix()) {
            satellitesInFix++;              
        }
        satellites++;
    }
    Log.i(TAG, satellites + " Used In Last Fix ("+satellitesInFix+")"); 
}

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