Question

我正在开发基于谷歌地图的应用程序，因为用户的当前位置必须在地图中显示。我有谷歌它并找到解决方案，但当我运行代码时，它不显示当前位置，而是单独显示谷歌地图。我的代码在

之下

 public class GPSLocation extends MapActivity {
private MapView mapView;
private MapController mapController;
private LocationManager locationManager;
private GPSLocationListener locationListener;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
   // mapView = (MapView) findViewById(R.id.mapView);

    // enable Street view by default
   // mapView.setStreetView(true);

    // enable to show Satellite view
    // mapView.setSatellite(true);

    // enable to show Traffic on map
    // mapView.setTraffic(true);

  //  mapView.setBuiltInZoomControls(true);

  //  mapController = mapView.getController();
   // mapController.setZoom(16);




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

    locationListener = new GPSLocationListener();

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


}
private class GPSLocationListener implements LocationListener 
{
    public GPSLocationListener() {
        // TODO Auto-generated constructor stub
    }
  @Override
  public void onLocationChanged(Location location) {
    if (location != null) {
        System.out.println("onLocationChanged");
          GeoPoint point = new GeoPoint(
                  (int) (location.getLatitude() * 1E6), 
                  (int) (location.getLongitude() * 1E6));


      Toast.makeText(getBaseContext(), 
          "Latitude: " + location.getLatitude() + 
          " Longitude: " + location.getLongitude(), 
          Toast.LENGTH_SHORT).show();

      mapController.animateTo(point);
      mapController.setZoom(16);
      mapView.invalidate();
    }
    else
    {
        System.out.println("OnLocationChanged value is null");
    }
  }



@Override
public void onProviderDisabled(String arg0) {
    // TODO Auto-generated method stub

}


@Override
public void onProviderEnabled(String arg0) {
    // TODO Auto-generated method stub

}


@Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
    // TODO Auto-generated method stub

}
}
@Override
protected boolean isRouteDisplayed() {
    // TODO Auto-generated method stub
    return false;
}





}

我不知道我在哪里犯了错误。它甚至没有进入GPSLocationListener类。请帮我.. 提前谢谢。

Answer 1

检查你的gps是否有效。改变最小距离和最小时间。例如：

requestLocationUpdates(LocationManager.GPS_PROVIDER,10,30,locationListener);

Answer 2

您是在设备或模拟器上进行测试吗？因为在模拟器上你必须手动输入坐标。

另外，请确保以下其中一个文件位于您的清单文件中：

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

Answer 3

请同时添加此行代码。它对我有用。

LocationManager.requestLocationUpdates(LocationManager.NETWORk_PROVIDER,0,0,locationListener);

如果仍然无效，请提供日志详细信息吗？

Answer 4

最近的Google Maps V2允许您实施 OnMyLocationChangeListener ，因此您无需实现（并设置）自定义的LocationSource。

如何在Android中通过GPS获取当前位置

4 个答案: