GnssStatus.CallBack onSatelliteStatusChanged()无法正常工作 [英] GnssStatus.CallBack onSatelliteStatusChanged() not working

问题描述

我正在开发一个想要了解gps卫星计数的应用程序.我为此使用了"onSatelliteStatusChanged"方法，但是它不起作用.您在下面看到的我使用的这段代码.

I am developing an application that I want to learn about the count of gps satellites. I am using the "onSatelliteStatusChanged" method for this, but it does not work. The piece of code that I use below that you see.

代码

 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            gnssStatusCallBack = new GnssStatus.Callback() {
                @Override
                public void onSatelliteStatusChanged(GnssStatus status) {

                        satelliteCount = status.getSatelliteCount();
                }
            };
            locManager.registerGnssStatusCallback(gnssStatusCallBack);
 } else {
      locManager.addGpsStatusListener(this);
 }
}

注意:我在外面测试过.

Note: I tested it outside.

推荐答案

概述(请求位置更新以接收它们):

如果未明确要求更新位置，则您的设备可能未在寻找此信息.以下对我有用，其中成员mGnssStatusCallback是您的Android培训.

---

Overview (request location updates to receive them):

Without explicitly asking for location updates, your device may not be seeking this information. The following worked for me where member mGnssStatusCallback is your GnssStatus.Callback and the Activity (or some other class) implements LocationListener; here this activity implements it and I pass this as the final parameter to requestLocationUpdates and removeUpdates. The 30000 indicates that we're requesting updates every 30 seconds (30000 milliseconds), with 0 indicating that we only want an update if the device has moved > 0 meters.

---

You probably need to figure out what providers are available, etc.
see Android Training.

---

public class GnssActivity extends Activity implements LocationListener {
    GnssStatus.Callback mGnssStatusCallback;
    LocationManager mLocationManager;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mLocationManager = 
                (LocationManager) getSystemService(LOCATION_SERVICE);
        mGnssStatusCallback = new GnssStatus.Callback() {
            // TODO: add your code here!
        };

    }

    @Override
    protected void onStart() {
        super.onStart();
        mLocationManager.registerGnssStatusCallback(mGnssStatusCallback);
        mLocationManager.requestLocationUpdates(
                LocationManager.GPS_PROVIDER, 30000, 0, this
        );
    }

    @Override
    protected void onStop() {
        mLocationManager.removeUpdates(this);
        mLocationManager.unregisterGnssStatusCallback(
                mGnssStatusCallback
        );
        super.onStop()
    }

    @Override
    public void onLocationChanged(Location location) {
    }

    @Override
    public void onStatusChanged(String provider, int status, 
            Bundle extras) {
    }

    @Override
    public void onProviderEnabled(String provider) {
    }

    @Override
    public void onProviderDisabled(String provider) {
    }

    ⋮
}

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