android - 当我们在室内使用安卓手机时，如何快速获取经纬度或gps数据？

Question

我正在尝试通过 GPS 从 Android 手机获取纬度和经度信息，当我在室外或直接在天空下时，我能够立即获取值，但当我在室内或房间内时获取这些值需要一分钟多的时间。当我在房间内使用我的应用程序时，任何人都可以帮助我快速获取这些值。

我使用以下代码获取值:

LocationManager locManager;
locManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,1000L,500.0f,
                                  locationListener);
Location location = locManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

和

private final LocationListener locationListener = new LocationListener() {
    public void onLocationChanged(Location location) {

    EditText myLocationText = (EditText)findViewById(R.id.editText1);
    EditText myLocationText1 = (EditText)findViewById(R.id.editText2);
    String latString = "";
    String LongString = "";

    if (location != null) {
        double lat = location.getLatitude();
        double lng = location.getLongitude();
        latString = "" + lat;
        LongString ="" + lng;



    } else {
        latString = "No location found";
        LongString = "No location found";
           }
     myLocationText.setText(""+ latString);
     myLocationText1.setText(""+ LongString);
}

除了使用 LocationManager 之外，还有其他方法可以获取 GPS 值吗？？

Answer 1

可以得到最后已知的位置，而且速度还挺快的:

/**
 * Gets the last known location.
 *
 * @param locationManager the location manager
 * @return the last known location
 */
public static Location getLastKnownLocation(LocationManager locationManager)
{
    Location bestResult = null;
    float bestAccuracy = 10000;
    long bestTime = 0;

    List<String> matchingProviders = locationManager.getAllProviders();

    for (String provider: matchingProviders) {
        Log.d("LOCATION", "Provider: " + provider);
        Location location = locationManager.getLastKnownLocation(provider);
        Log.d("LOCATION", "Location found? "+ (location==null?"NO":"YES"));
        if (location != null) {
            float accuracy = location.getAccuracy();
            long time = location.getTime();
            Log.d("LOCATION", "Acc: "+ String.valueOf(accuracy) + " -- Time: " + String.valueOf(time));
            if ((time > minTime && accuracy < bestAccuracy)) {
                bestResult = location;
                bestAccuracy = accuracy;
                bestTime = time;
            }
            else if (time < minTime && 
                    bestAccuracy == Float.MAX_VALUE && time > bestTime){
                bestResult = location;
                bestTime = time;
            }
        }
    }
    Log.d("LOCATION", "BEST FOUND? "+ (bestResult==null?"NO":"YES"));

    return bestResult;
}