Обратный вызов Google OnSonnect() GoogleApiClient от Google никогда не набирается

Question

Я следую руководству Google о том, как найти место в своем приложении для Android, используя GoogleApiClient, но у меня возникает проблема после того, как я создаю клиент и пытаюсь подключиться. Я вижу, что клиент пытается подключиться, но ни onConnected(), ни onConnectionFailed() callbacks никогда не вызываются. Таким образом, клиент никогда не устанавливает соединение или сообщения, что он этого не сделал. Что мне здесь не хватает?

ОБНОВЛЕНИЕ: Добавлена ​​проверка разрешений для доступа к местоположению.

public class MainActivity extends AppCompatActivity 
    implements OnMapReadyCallback, 
    GoogleApiClient.ConnectionCallbacks, 
    GoogleApiClient.OnConnectionFailedListener, 
    LocationListener { 

public static final String LOG_TAG = MainActivity.class.getSimpleName(); 
private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000; 
private final static int MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION = 0; 

private Location mCurrentLocation = new Location("default"); 
private GoogleApiClient mGoogleApiClient = null; 
private Location mLastLocation = null; 

@Override 
public void onRequestPermissionsResult(int requestCode, 
             String permissions[], int[] grantResults) { 
    switch (requestCode) { 
     case MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION: { 
      // If request is cancelled, the result arrays are empty. 
      if (grantResults.length > 0 
        && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 

       // permission was granted, yay! Do the 
       // contacts-related task you need to do. 
       Log.e("Connected: ", String.valueOf(mGoogleApiClient.isConnected())); 
       mGoogleApiClient.connect(); 
       Log.e("Connected: ", String.valueOf(mGoogleApiClient.isConnected())); 

      } else { 

       // permission denied, boo! Disable the 
       // functionality that depends on this permission. 
      } 
      return; 
     } 
    } 
} 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    // check if permissions are granted 
    if (ContextCompat.checkSelfPermission(this, 
      Manifest.permission.ACCESS_FINE_LOCATION) 
      != PackageManager.PERMISSION_GRANTED) { 

     ActivityCompat.requestPermissions(this, 
       new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 
       MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION); 

    } 

    if (mGoogleApiClient == null) { 
     mGoogleApiClient = new GoogleApiClient.Builder(this) 
       .addConnectionCallbacks(this) 
       .addOnConnectionFailedListener(this) 
       .addApi(LocationServices.API) 
       .build(); 
    } 
} 


@Override 
protected void onStop() { 
    if (mGoogleApiClient.isConnected()) { 
     mGoogleApiClient.disconnect(); 
    } 

    super.onStop(); 
} 

private void handleNewLocation(Location location) { 
    Log.d(LOG_TAG, location.toString()); 
} 

@Override 
public void onConnected(@Nullable Bundle bundle) { 
    try { 
     mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient); 
     if (mLastLocation == null) { 

     } 
     else { 
      handleNewLocation(mLastLocation); 
     } 
    } catch (SecurityException e) { 
     DialogFragment mlocationDialog = new LocationDialogFragment(); 
     mlocationDialog.show(getSupportFragmentManager(), "locationDialog"); 
    } 

} 

@Override 
public void onConnectionFailed(ConnectionResult connectionResult) { 
    if (connectionResult.hasResolution()) { 
     try { 
      // Start an Activity that tries to resolve the error 
      connectionResult.startResolutionForResult(this, CONNECTION_FAILURE_RESOLUTION_REQUEST); 
     } catch (IntentSender.SendIntentException e) { 
      e.printStackTrace(); 
     } 
    } else { 
     Log.i(LOG_TAG, "Location services connection failed with code " + connectionResult.getErrorCode()); 
    } 
} 

Answer 1

Вы внесли разрешения?

@Override 
public void onRequestPermissionsResult(int requestCode, 
    String permissions[], int[] grantResults) { 
    switch (requestCode) { 
    case MY_PERMISSIONS_REQUEST_READ_CONTACTS: { 
     // If request is cancelled, the result arrays are empty. 
     if (grantResults.length > 0 
      && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 

      // permission was granted, yay! Do the 
      // contacts-related task you need to do. 

     } else { 

      // permission denied, boo! Disable the 
      // functionality that depends on this permission. 
     } 
     return; 
    } 

    // other 'case' lines to check for other 
    // permissions this app might request 
} 
} 

Подробнее: https://developer.android.com/training/permissions/requesting.html