當前用戶位置Google地圖API v2中的片段（NOT ACTIVITY）

Question

我正在使用適用於Android v2的Google地圖。我想顯示當前的用戶位置並放大它。當然有很多關於這方面的材料，但大多數都使用了Activity。在我的情況下，我使用Fragment。

這裏是片段它只是顯示地圖中的代碼：onyone 檢查並修復它？

public class MainFragment extends Fragment{ 

    private SupportMapFragment mSupportMapFragment; 
    private GoogleMap mGoogleMap; 

    private LocationManager mLocationManager; 
    private LocationListener mLocationListener = new LocationListener() { 
     @Override 
     public void onLocationChanged(Location location) { 
      getCurrentLocation(); 
     } 

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

     } 

     @Override 
     public void onProviderEnabled(String provider) { 

     } 

     @Override 
     public void onProviderDisabled(String provider) { 

     } 
    }; 
    @Override 
    public void onActivityCreated(@Nullable Bundle savedInstanceState) { 
     super.onActivityCreated(savedInstanceState); 

     FragmentManager mFragmentManager = getChildFragmentManager(); 
     mSupportMapFragment = (SupportMapFragment) mFragmentManager.findFragmentById(R.id.map_container); 
     if (mSupportMapFragment == null) { 
      mSupportMapFragment = SupportMapFragment.newInstance(); 
      mFragmentManager.beginTransaction().replace(R.id.map_container, mSupportMapFragment).commit(); 
     } 
    } 

    void getCurrentLocation(){ 
     mLocationManager = (LocationManager)getActivity().getSystemService(Context.LOCATION_SERVICE); 
     mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,mLocationListener); 
     Location myLocation = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); 
     //Location myLocation = mGoogleMap.getMyLocation(); 
     if(myLocation!=null) 
     { 
      double dLatitude = myLocation.getLatitude(); 
      double dLongitude = myLocation.getLongitude(); 
      Log.i("APPLICATION"," : "+dLatitude); 
      Log.i("APPLICATION"," : "+dLongitude); 
      mGoogleMap.addMarker(new MarkerOptions().position(new LatLng(dLatitude, dLongitude)).title("My Location").snippet("Location")); 
      mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(dLatitude, dLongitude), 8)); 

     } 
     else 
     { 
      Toast.makeText(getActivity(), "Unable to fetch the current location", Toast.LENGTH_SHORT).show(); 
     } 
    } 

    @Override 
    public void onDetach() { 
     super.onDetach(); 
     try { 
      Field childFragmentManager = Fragment.class.getDeclaredField("mChildFragmentManager"); 
      childFragmentManager.setAccessible(true); 
      childFragmentManager.set(this, null); 
     } catch (NoSuchFieldException e) { 
      throw new RuntimeException(e); 
     } catch (IllegalAccessException e) { 
      throw new RuntimeException(e); 
     } 
    } 
} 

感謝您的幫助！

Answer 1

您是否試過獲取位置數據的官方文檔？這可能是你想要檢查的第一件事。 Link

請嘗試以下功能。

void getCurrentLocation() { 
    Location myLocation = mMap.getMyLocation(); 
    if(myLocation!=null) 
    { 
     double dLatitude = myLocation.getLatitude(); 
     double dLongitude = myLocation.getLongitude(); 
     Log.i("APPLICATION"," : "+dLatitude); 
     Log.i("APPLICATION"," : "+dLongitude); 
     mMap.addMarker(new MarkerOptions().position(
       new LatLng(dLatitude, dLongitude)).title("My Location").icon(BitmapDescriptorFactory.fromBitmap(Utils.getBitmap("pointer_icon.png")))); 
     mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(dLatitude, dLongitude), 8)); 

    } 
    else 
    { 
     Toast.makeText(this, "Unable to fetch the current location", Toast.LENGTH_SHORT).show(); 
    } 

}