的Android onLocationChanged和MainActivity

类

我有以下代码：的Android onLocationChanged和MainActivity

public class MyLocationListener implements LocationListener { 


@Override 
public void onLocationChanged(Location loc) { 
    // called when the listener is notified with a location update from the GPS 
    Log.d("Latitude", Double.toString(loc.getLatitude())); 
    Log.d("Longitude", Double.toString(loc.getLongitude())); 
} 
@Override 
public void onProviderDisabled(String provider) { 
    // called when the GPS provider is turned off (user turning off the GPS on the phone) 
} 
@Override 
public void onProviderEnabled(String provider) { 
    // called when the GPS provider is turned on (user turning on the GPS on the phone) 
} 
@Override 
public void onStatusChanged(String provider, int status, Bundle extras) { 

}

，并在我的MainActivity

  LocationListener locationListener = new MyLocationListener(); 
     LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 

     lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);

现在，我要的是一次接收设备的当前位置在MainActivity类（获取高度和经度变量以便在应用程序中稍后使用）。

A.如何在一次后停止接收位置？函数lm.removeUpdates（listener）只能在MainActivity类中调用。

B.基本一致。如何在MyLocationListener类和MainActivity之间进行连接？

对不起，我是Android和Java开发的新手。并且谢谢！

来源

2012-09-16 user1591982

您可以使用下面的示例代码：

public class LocationGetter { 
    private final Context context; 
    private Location location = null; 
    private final Cordinate gotLocationLock = new Cordinate(); 
    private final LocationResult locationResult = new LocationResult() { 
     @Override 
     public void gotLocation(Location location) { 
      synchronized (gotLocationLock) { 
       LocationGetter.this.location = location; 
       gotLocationLock.notifyAll(); 
       Looper.myLooper().quit(); 
      } 
     } 
    }; 

    public LocationGetter(Context context) { 
     if (context == null) 
      throw new IllegalArgumentException("context == null"); 

     this.context = context; 
    } 

    public void getLocation(int maxWaitingTime, int updateTimeout) { 
     try { 
      final int updateTimeoutPar = updateTimeout; 
      synchronized (gotLocationLock) { 
       new Thread() { 
        public void run() { 
         Looper.prepare(); 
         LocationResolver locationResolver = new LocationResolver(); 
         locationResolver.prepare(); 
         locationResolver.getLocation(context, locationResult, updateTimeoutPar); 
         Looper.loop(); 
        } 
       }.start(); 

       gotLocationLock.wait(maxWaitingTime); 
      } 
     } catch (InterruptedException e1) { 
      e1.printStackTrace(); 
     } 
     gteAddress(); 
    } 


public double getLatitude() { 
    return location.getLatitude(); 
} 

public double getLongitude() { 
    return location.getLongitude(); 
}

在你的活动中使用：

_locationGetter=new LocationGetter(context); 

_locationGetter.getLocation(200000000, 10000000); 

_locationGetter.getLongitude(); 

_locationGetter.getLatitude();

来源

2012-09-16 12:49:13 yokees

谢谢，我没有想到这个！但是我怎么能和我的班级一起使用它？我怎样才能知道它何时获得价值？ – user1591982

在您的活动中使用线程获取位置以及线程完成时调用getLongitude（）&& getLatitude（）方法通知您。 – yokees

您还可以使用LocationManager.removeUpdates obtining坐标（也可能是检查后如果坐标足以满足您的需求）：

 @Override 
    public void onLocationChanged(Location loc) { 
     // called when the listener is notified with a location update from the GPS 
     Log.d("Latitude", Double.toString(loc.getLatitude())); 
     Log.d("Longitude", Double.toString(loc.getLongitude())); 
     lm.removeUpdates(this); 
    }

来源

2012-09-16 13:37:49 toommm

但我无法引用lm，因为它在MainActivity类中。 – user1591982

只是使MyLocationManager成为MainActivity的内部类。 – toommm

的Android onLocationChanged和MainActivity

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