就像我在測(cè)試一個(gè)nexus s（4.0.4提供google play服務(wù)）和avd（4.2.2 with google api）之前遇到的問題一樣，在這兩種情況下，locationclient getLastLocation()總是返回null。public class MainActivity extends Activity implements LocationListener,        GooglePlayServicesClient.ConnectionCallbacks,        GooglePlayServicesClient.OnConnectionFailedListener {    private LocationClient mLocationClient;    private LocationRequest mLocationRequest;    boolean mUpdatesRequested = false;    boolean mConnected = false;    SharedPreferences mPrefs;    SharedPreferences.Editor mEditor;    private TextView mText;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mText = (TextView) findViewById(R.id.text);        mLocationRequest = LocationRequest.create();        mLocationRequest                .setInterval(LocationUtils.UPDATE_INTERVAL_IN_MILLISECONDS);    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);        mLocationRequest.setFastestInterval(LocationUtils.FAST_INTERVAL_CEILING_IN_MILLISECONDS);        mUpdatesRequested = false;        mPrefs = getSharedPreferences(LocationUtils.SHARED_PREFERENCES,                Context.MODE_PRIVATE);        mEditor = mPrefs.edit();        mLocationClient = new LocationClient(this, this, this);    }    @Override    public void onStart() {        super.onStart();        /*         * Connect the client. Don't re-start any requests here; instead, wait         * for onResume()         */        mLocationClient.connect();    }在onConnected()打電話之前getLastLocation()，但仍然沒有運(yùn)氣。哪里是錯(cuò)誤，提前謝謝。