Location.getAltitude() 在一段时间后开始返回相同的值

Question

I need your help. I wrote a very simple Android widget that shows the altitude which I get in the onLocationChanged method:

public void onLocationChanged(Location location) {
    double myAltitude = -99;
    if (location.hasAltitude()) {
        myAltitude = location.getAltitude();
        Log.d("SAT-LOG","Current Altitude is : "+myAltitude);
        Log.d("SAT-LOG","Current Coordinatees : "+location.getLatitude()+"-"+location.getLongitude());
    }
    ...
}

Here how I request the location update:

locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
locationManager.registerGnssStatusCallback(gnssActivity);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 500, 1, gnssActivity);

I also tried this:

Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setPowerRequirement(Criteria.POWER_HIGH);
criteria.setAltitudeRequired(true);
criteria.setSpeedRequired(true);
criteria.setCostAllowed(true);
criteria.setBearingRequired(false);
criteria.setHorizontalAccuracy(Criteria.ACCURACY_HIGH);
criteria.setVerticalAccuracy(Criteria.ACCURACY_HIGH);
locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
locationManager.registerGnssStatusCallback(gnssActivity);
locationManager.requestLocationUpdates(1000,1,criteria,gnssActivity,null);

I noticed that location.hasAltitude() is always true. After 10/15 minutes the value is stuck: location.getAltitude() returns the same value until the device reboot (for the record I am using a car tablet). Instead, the location latitude/longitude are always correct. If I open the App GPSTest, I see the correct value of altitude. Can someone help me to understand the issue? Is there a better way to get the altitude?

Answer 1

Huawei Location Kit may help with your issue.Check Docs .

You can obtains the altitude of the current location by using Location Kit.

For Detail,pls kindly refer:

HWLocation

getAltitude()