Android 监听 GPS 状态的变化？

Question

您好，我需要知道如何在 Android 中使用 GPS 监听以下信息，以便我可以在 PreferenceActivity 中更新 UI。我尝试过 GpsStatus.Listener 但没有任何反应。

• GpsStatus.GPS_EVENT_STARTED
• GpsStatus.GPS_EVENT_STOPPED

任何建议都会很好。

Answer 1

    mLocationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);

    // Define a listener that responds to location updates
    mGPSStatusListener = new GpsStatus.Listener() {
        public void onGpsStatusChanged(int event) {
            switch (event) {
            case GpsStatus.GPS_EVENT_SATELLITE_STATUS:
                satelliteStatus = mLocationManager.getGpsStatus(null);

                Iterable<GpsSatellite> iSatellites = satelliteStatus
                        .getSatellites();
                Iterator<GpsSatellite> it = iSatellites.iterator();
                maxsatellites = 0;
                while (it.hasNext()) {
                    GpsSatellite oSat = (GpsSatellite) it.next();
                    statArray[maxsatellites][0] = oSat.getPrn();
                    statArray[maxsatellites][1] = oSat.getAzimuth();
                    statArray[maxsatellites][2] = oSat.getPrn();
                    statArray[maxsatellites][3] = oSat.getElevation();
                    statArray[maxsatellites][4] = oSat.getSnr();
                    if (oSat.usedInFix()) {
                        statArray[maxsatellites][5] = 1;
                    } else {
                        statArray[maxsatellites][5] = 0;
                    }
                    maxsatellites++;
                }

                if (mLastLocation != null)
                    if ((SystemClock.elapsedRealtime() - mLastLocationMillis) < 3000) {
                        isGPSFix = 7; // Enumeration for ONC_STAT_3D
                    } else {
                        isGPSFix = 2; // Enumeration for ONC_STAT_BAD_COVER
                    }

                }

                if (isGPSFix == 1) { // A fix has been acquired.
                    // Do something.
                } else { // The fix has been lost.
                    // Do something.
                }

                break;
            case GpsStatus.GPS_EVENT_FIRST_FIX:
                // Do something.
                isGPSFix = 1;
                break;
            case GpsStatus.GPS_EVENT_STOPPED:
                if ((mLastLocation = mLocationManager
                        .getLastKnownLocation(LocationManager.GPS_PROVIDER)) != null) {
                    isGPSFix = 5; // Enumeration for                    } else {
                    isGPSFix = 2; // Enumeration for 
                }

            }
        }

    };

    mGPSLocationListener = new LocationListener() {
        public void onLocationChanged(Location location) {
            // Called when a new location is found by the location
            // provider.
            if (location == null)
                return;

            mLastLocationMillis = SystemClock.elapsedRealtime();

            // Do something.

            mLastLocation = location;
                        }
        }

        public void onProviderDisabled(String provider) {
            // TODO Auto-generated method stub

        }

        public void onProviderEnabled(String provider) {
            // TODO Auto-generated method stub

        }

        public void onStatusChanged(String provider, int status,
                Bundle extras) {
            // TODO Auto-generated method stub

        }
    };

    mLocationManager.addGpsStatusListener(mGPSStatusListener);


    // Register the listener with the Location Manager to receive location
    // updates
    mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
            mUpdateIntervalInMillis, 0, mGPSLocationListener);

Answer 2

查看了系统设置应用程序的源代码以及他们如何做到这一点并将其实现到我的应用程序中，效果很好。感谢 @SKJ 的帮助，但遗憾的是我无法让 GpsStatus.Listener 工作，源代码完美工作。