无法解析方法requestLocationUpdates

Question

我正在尝试调用方法requestLocationUpdates,但最终我收到一条错误消息"无法解析方法".我认为这是因为"这个"论点,但我不确定.我导入了LocationListener,但它没有帮助我.

这是我的代码部分:

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

public class MainMap extends ActionBarActivity implements LocationListener {

    private void addMarker(){
        int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getBaseContext());
        if(status!= ConnectionResult.SUCCESS){ // Google Play Services are not available

            int requestCode = 10;
            Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this, requestCode);
            dialog.show();

        }else { // Google Play Services are available
            googleMap.setMyLocationEnabled(true);
            LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
            Criteria criteria = new Criteria();
            String provider = locationManager.getBestProvider(criteria, true);
            Location location = locationManager.getLastKnownLocation(provider);

            if (location != null) {
                onLocationChanged(location);
            }

            // troubles here
            locationManager.requestLocationUpdates(provider, 20000, 10, this);

        }
    }

    @Override
    public void onLocationChanged(Location location) {
        double latitude = location.getLatitude();
        double longitude = location.getLongitude();
        LatLng latLng = new LatLng(latitude, longitude);
        googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
        googleMap.animateCamera(CameraUpdateFactory.zoomTo(20));
    }

}

Answer 1

您正在LocationListener从错误的包导入.您似乎将其导入为:

com.google.android.gms.location.LocationListener

但requestLocationUpdates (String provider, long minTime, float minDistance, LocationListener listener)方法是这种类型的最后一个参数:

android.location.LocationListener

你可以在这里看到.

将import语句更改为load android.location.LocationListener应该可以解决问题.