Java 按按钮时的GPS定位

我目前正在编写一个应用程序，它将访问一个按钮的当前位置，并打印出来。我现在有一个方法，可以得到最后一个已知的位置。我在很多地方都看到，一个是实现一个获取位置的类。我当前的代码以字符串形式返回，但它只获取手机上次更新的位置。我怎样才能更改它，当我按下按钮并调用使用此字符串的方法时，它将获得currentLocation而不是lastLocation？ 非常感谢你！ 此外，这是我有史以来第一个android应用程序，我只有Java和类实现的中级知识

public String getLocation(){
    String userLocation;

    try {
        LocationManager locMgr = (LocationManager) this.getSystemService(LOCATION_SERVICE);
        Location recentLoc = locMgr.getLastKnownLocation(LocationManager.GPS_PROVIDER);
        String userLocator = recentLoc.toString();
        userLocation = compressString(userLocator);
        //userLocation = recentLoc.toString();

    }
            catch(Exception e) {
        userLocation = "Location failed";
    }

    return userLocation;
}

---

我想你的GPS现在已经关机了。如果您打开设备的位置服务，它将打印出离您最近的位置。如果它不起作用，则必须对活动实现LocationListener类。类似于。

尝试使用以下代码：

LocationManager locationManager=(LocationManager)this.getSystemService(Context.LOCATION_SERVICE);
LocationListener locationListener=new LocationListener() {

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onProviderEnabled(String provider) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onProviderDisabled(String provider) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onLocationChanged(Location location) {
        double lat=location.getLatitude();
        double lng=location.getLongitude();

    }
};
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);//or LocationManager.NETWORK_PROVIDER

---

}

尝试一下onClick方法

private void _getLocation() {
// Get the location manager
LocationManager locationManager = (LocationManager) 
getSystemService(LOCATION_SERVICE);
Criteria criteria = new Criteria();
String bestProvider = locationManager.getBestProvider(criteria, false);
Location location = locationManager.getLastKnownLocation(bestProvider);
LocationListener loc_listener = new LocationListener() {

public void onLocationChanged(Location l) {}
public void onProviderEnabled(String p) {}
public void onProviderDisabled(String p) {}
public void onStatusChanged(String p, int status, Bundle extras) {}
    };
    locationManager
            .requestLocationUpdates(bestProvider, 0, 0, loc_listener);
    location = locationManager.getLastKnownLocation(bestProvider);
    try {
        lat = location.getLatitude();
        lon = location.getLongitude();
    } catch (NullPointerException e) {
        lat = -1.0;
        lon = -1.0;
    }
}