Android的 - 无法获取在模拟器上的GPS定位 [英] Android - Unable to get the gps location on the emulator

问题描述

我我特林使用GPS的Andr​​oid模拟器，我下面的code：

i'm tring to use the gps on the android emulator, i've the following code:

public class NL extends Activity {

 private LocationManager locmgr = null;

 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.nl);

        locmgr = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

        Criteria crit = new Criteria();
        crit.setAccuracy(Criteria.ACCURACY_FINE);
        String provider = locmgr.getBestProvider(crit, true);
        Location loc = locmgr.getLastKnownLocation(provider);


        Toast msg = Toast.makeText(this, "Lon: " + Double.toString(loc.getLongitude()) + " Lat: " + Double.toString(loc.getLatitude()), Toast.LENGTH_SHORT);
        msg.show();
    }
}

我已经在清单中添加以下行：

i've added the following line at the manifest:

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

和我已经设置了GPS定位与DDMS方法，要么与地缘修复方法，但是当我运行code，我得到一个NullPointerExeption在吐司线，可能会导致LOC为空。

and i've set the gps location with the DDMS method and either with the geo fix method, but when i run the code, i get a NullPointerExeption at the Toast line, probably cause loc is null.

我不明白的地方错误的是......你能帮助我吗？

I don't understand where the error is... can you help me please?

更新！

感谢您的帮助，现在我用下面的code和我没有得到任何错误，但它不运行里面onChangeLocation的code ......它不运行的面包和不返回任何消息，在日志中！

Thanks for your help, now i use the following code and i don't get any error, but it doesn't run the code inside onChangeLocation... it doesn't run the Toast and don't return any message in the log!

 public class NL extends Activity {

        private LocationManager locmgr = null;

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.nl);

            locmgr = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

         // Define a listener that responds to location updates
            LocationListener locationListener = new LocationListener() {
                public void onLocationChanged(Location loc) {
                  // Called when a new location is found by the network location provider.
                    Log.i("NOTIFICATION","onLocationChenged Triggered");

                    Toast msg = Toast.makeText(NetworkLocator.this, "Lon: " + Double.toString(loc.getLongitude()) + " Lat: " + Double.toString(loc.getLatitude()), Toast.LENGTH_SHORT);
                    msg.show();
                }

                public void onStatusChanged(String provider, int status, Bundle extras) {}

                public void onProviderEnabled(String provider) {}

                public void onProviderDisabled(String provider) {}
              };

            // Register the listener with the Location Manager to receive location updates
            locmgr.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
        }
    }

谢谢！

推荐答案

找到了解决办法：

LocationManager.NETWORK_PROVIDER是错误的。

LocationManager.NETWORK_PROVIDER is WRONG.

修正：LocationManager.GPS_PROVIDER

correction: LocationManager.GPS_PROVIDER

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