没有获得当前位置

时间:2014-01-16 17:08:52

标签: android currentlocation

我正在尝试获取当前位置并将其LAt和LON发送到另一个班级。但是我的应用程序没有获得它显示最后位置的当前位置。请帮助我如何使用GPS获取当前位置和NETWORK提供商。

以下是代码:

public class location  implements LocationListener 
{
private LocationManager mgr;
private String best;
Location location;
public static double myLocationLatitude;
public static double myLocationLongitude;

 public void locUpdate(Context context)
 {

    mgr = (LocationManager) context.getSystemService(context.LOCATION_SERVICE);
    Criteria criteria = new Criteria();
   // criteria.setAccuracy(Criteria.ACCURACY_COARSE);

    best = mgr.getBestProvider(criteria, true);
     mgr.requestLocationUpdates(LocationManager.PASSIVE_PROVIDER,0,0,this);

  try{
     Location location = mgr.getLastKnownLocation(best);
    Intent i = new Intent();
    i.setClass(context,sentsms.class);
     i.putExtra("latitude", location.getLatitude());
     i.putExtra("longitude", location.getLongitude());
     i.setFlags(Intent.FLAG_ACTIVITY_MULTIPLE_TASK);                     
     i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  

     // Launch the new activity and add the additional flags to the intent
     context.getApplicationContext().startActivity(i);
    }
    catch(Exception e)
    {

    }
 }  





public void onLocationChanged(Location location) {

    dumpLocation(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

}


protected void onPause() 
{

   // super.onPause();
    mgr.removeUpdates(this);
}

protected void onResume() {

   // super.onResume();
    mgr.requestLocationUpdates(best, 15000, 10, this);
}

private void dumpLocation(Location l) {

    if (l != null){

        myLocationLatitude = l.getLatitude();
        myLocationLongitude = l.getLongitude();
    }
}
} 

2 个答案:

答案 0 :(得分:0)

来自getLastKnownLocation()的文档:

  

返回指示上一个已知位置的数据的位置   从给定的提供者处获得的修复。

     

这可以在不启动提供程序的情况下完成。请注意这一点   位置可能已过时,例如,如果设备已转动   关闭并搬到另一个地方。

     

如果当前禁用了提供程序,则返回null。

这意味着getLastKnownLocation()将根据Location的上次修复检索Provider。如果您想要更新Locations,请使用Location

中收到的onLocationChanged()

答案 1 :(得分:0)

请尝试这种方式

LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
// Creating a criteria object to retrieve provider
Criteria criteria = new Criteria();
// Getting the name of the best provider
String provider = locationManager.getBestProvider(criteria, true);
if (provider != null) {

location = locationManager.getLastKnownLocation(provider);
// locationManager.requestLocationUpdates(provider, 1000*60*60,
// 1000, this);
// update only in 1 hour and 1 km of distance
locationManager.requestLocationUpdates(provider, 100, 1, this);
}