更新當前位置而不是默認值？

Question

試圖讓應用程序顯示當前位置，但我不相信它甚至到達onConnected（）。有什麼建議麼？我正在一個地圖片段中工作，地圖上顯示的是默認位置。

import android.Manifest; 
    import android.content.Context; 
    import android.content.pm.PackageManager; 
    import android.location.Location; 
    import android.os.Bundle; 
    import android.support.annotation.NonNull; 
    import android.support.annotation.Nullable; 
    import android.support.v4.app.Fragment; 
    import android.support.v4.content.ContextCompat; 
    import android.util.Log; 
    import android.view.LayoutInflater; 
    import android.view.View; 
    import android.view.ViewGroup; 
    import android.widget.Toast; 

    import com.google.android.gms.common.ConnectionResult; 
    import com.google.android.gms.common.api.GoogleApiClient; 
    import com.google.android.gms.location.LocationServices; 
    import com.google.android.gms.location.places.Places; 
    import com.google.android.gms.maps.CameraUpdateFactory; 
    import com.google.android.gms.maps.GoogleMap; 
    import com.google.android.gms.maps.MapView; 
    import com.google.android.gms.maps.MapsInitializer; 
    import com.google.android.gms.maps.OnMapReadyCallback; 
    import com.google.android.gms.maps.model.LatLng; 
    import com.google.android.gms.maps.model.LatLngBounds; 
    import com.google.android.gms.maps.model.MarkerOptions; 

    /** 
    * A simple {@link Fragment} subclass. 
    * MapsFragment is where users will be able to select the business where they currently are and either report whether the business is hb141 compliant or if there 
    * is any suspicious trafficking behavior to report. 
    */ 

    public class MapFragment extends Fragment implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener { 

final String LOG = "HB141Log"; 

//Places API 
Context context; 
protected GoogleApiClient mGoogleApiClient; 
protected LatLng mLastLocation; 

//Maps API 
MapView mMapView; 
GoogleMap googleMap; 


public MapFragment() { 
    // Required empty public constructor 
} 

@Override 
public void onCreate(Bundle savedInstanceState){ 
    super.onCreate(savedInstanceState); 
    context = getActivity().getApplicationContext(); 
} 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    View v = inflater.inflate(R.layout.fragment_map, container, false); 

    //this segment will initialize the mapview 
    mMapView = (MapView) v.findViewById(R.id.mapView); 
    mMapView.onCreate(savedInstanceState); 
    mMapView.onResume();// needed to get the map to display immediately 
    try { 
     MapsInitializer.initialize(getActivity().getApplicationContext()); 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } 

    //then this segment uses the mapview to create a googlemap 
    mMapView.getMapAsync(new OnMapReadyCallback() { 
     @Override 
     public void onMapReady(GoogleMap readyMap) { 
      googleMap = readyMap; 
      googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL); 
      googleMap.setBuildingsEnabled(true); 
      final LatLngBounds NEWENGLAND = new LatLngBounds(
        new LatLng(41, -73), new LatLng(47, -68)); 
      googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(34, 84), 6)); //defaults to atlanta 
     } 
    }); 

    //this segment initializes the googleapiclient for places api use 
    buildGoogleApiClient(); 


    return v; 
} 

//callbacks for the maps api and googleapiclient 
@Override 
public void onResume(){ 
    super.onResume(); 
    mMapView.onResume(); 
    mGoogleApiClient.connect(); 
} 

@Override 
public void onPause(){ 
    super.onPause(); 
    mMapView.onPause(); 
    mGoogleApiClient.disconnect(); 
} 

//callbacks for the maps api 
@Override 
public void onDestroy(){ 
    super.onDestroy(); 
    mMapView.onDestroy(); 
} 

@Override 
public void onLowMemory() { 
    super.onLowMemory(); 
    mMapView.onLowMemory(); 
} 

//used to build the googleapiclient 
protected synchronized void buildGoogleApiClient() { 
    mGoogleApiClient = new GoogleApiClient 
      .Builder(context) 
      .addApi(Places.GEO_DATA_API) 
      .addApi(Places.PLACE_DETECTION_API) 
      .addApi(LocationServices.API) 
      .enableAutoManage(getActivity(), this) 
      .build(); 
} 




@Override 
public void onConnected(Bundle connectionHint) { 
    Location lastLocation = null; 
    if (ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED 
      || ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) { 
     lastLocation = LocationServices.FusedLocationApi.getLastLocation(
       mGoogleApiClient); 
    } 
    if (lastLocation != null) { 
     mLastLocation = new LatLng(lastLocation.getLatitude(), lastLocation.getLongitude()); 
     handleNewLocation(lastLocation); 
    } 
} 

private void handleNewLocation(Location loc) { 
    double currentLatitude = loc.getLatitude(); 
    double currentLongitude = loc.getLongitude(); 
    LatLng latLng = new LatLng(currentLatitude, currentLongitude); 
    System.out.println("handleNewLocation "); 
    MarkerOptions options = new MarkerOptions() 
    .position(latLng) 
    .title("I am here!"); 
    googleMap.addMarker(options); 
    googleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng)); 
} 

@Override 
public void onConnectionSuspended(int i) { 
    Log.d(LOG, "CONNECTION SUSPENDED: " + String.valueOf(i)); 
} 

@Override 
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) { 
    Log.d(LOG, "CONNECTION FAILED: " + connectionResult.getErrorMessage()); 
} 

public void onStart() { 
    mGoogleApiClient.connect(); 
    super.onStart(); 
} 

public void onStop() { 
    mGoogleApiClient.disconnect(); 
    super.onStop(); 
} 

}

Answer 1

//To setup location manager 

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

    //To request location updates 
    locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1, 1, this);