Android GPS 需要一段时间才能准确

发布于 2024-12-20 12:17:45 字数 1587 浏览 2 评论 0原文

我制作了一个 Android 应用程序，只需单击按钮即可通过经度和纬度获取位置。

首先，我得到了最后一个已知的位置读数，出于争论的原因，当我第一次加载应用程序/打开 GPS 时，这是不准确的。

我想知道的是如何等待它准确，就像在谷歌地图中，当你收到“等待位置”的吐司消息时。

如果您发现可以改进代码的任何方法，它也会很有帮助。

参考代码：

public class Clue extends Activity {

    public static double latitude;
    public static double longitude;
    Criteria criteria;
    LocationManager lm;
    LocationListener ll;
    Location location;

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.questions);

      criteria = new Criteria();
      criteria.setAccuracy(Criteria.ACCURACY_FINE);
      lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
      ll = new MyLocationListener();
      lm.requestLocationUpdates(lm.getBestProvider(criteria, true), 0, 0, ll);          
}



private boolean weAreThere() {
    location = getLocation(); 
    longitude = location.getLongitude();
    latitude = location.getLatitude();

    return inCorrectPlace(param);
}

private Location getLocation() {
     lm.requestLocationUpdates(lm.getBestProvider(criteria, true), 0, 0, ll); 
      return lm.getLastKnownLocation(lm.getBestProvider(criteria, true));
}
}

    public class MyLocationListener implements LocationListener
    {
        public void onLocationChanged(Location loc)
        {        
             Clue.longitude = loc.getLongitude();
             Clue.latitude = loc.getLatitude();
        }
}

感谢您的阅读，所有回复将不胜感激。

本

原文

I have made an Android app that gets location by longitude and latitude on a button click.

At first I get the last known location reading, which is, for argument sake, inaccurate when I first load up the app/turn on gps.

What I would like to know is how to wait for it to be accurate, like in Google maps when you get the toast message 'waiting for location'.

If you see any way the code can be improved it would also be helpful.

Code for reference:

public class Clue extends Activity {

    public static double latitude;
    public static double longitude;
    Criteria criteria;
    LocationManager lm;
    LocationListener ll;
    Location location;

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.questions);

      criteria = new Criteria();
      criteria.setAccuracy(Criteria.ACCURACY_FINE);
      lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
      ll = new MyLocationListener();
      lm.requestLocationUpdates(lm.getBestProvider(criteria, true), 0, 0, ll);          
}



private boolean weAreThere() {
    location = getLocation(); 
    longitude = location.getLongitude();
    latitude = location.getLatitude();

    return inCorrectPlace(param);
}

private Location getLocation() {
     lm.requestLocationUpdates(lm.getBestProvider(criteria, true), 0, 0, ll); 
      return lm.getLastKnownLocation(lm.getBestProvider(criteria, true));
}
}

    public class MyLocationListener implements LocationListener
    {
        public void onLocationChanged(Location loc)
        {        
             Clue.longitude = loc.getLongitude();
             Clue.latitude = loc.getLatitude();
        }
}

Thanks for reading, all replies will be appreciated.

Ben

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