我们可以在片段中实现位置功能吗？

Question

我想知道我们是否可以在片段中实现LocationClient功能;我完全遵循了这个post，所以我的代码就是这个，它非常接近官方文档，除了它在片段而不是FragmentActivity中实现。但我终于对此表示怀疑。

所以我不想在这里重写完全相同的代码，但只是初始化，我有：

package .....;

import .....;
public class Fragment_init extends Fragment implements LocationListener, GooglePlayServicesClient.ConnectionCallbacks, GooglePlayServicesClient.OnConnectionFailedListener {

    // variables declarations
    static {
        System.loadLibrary("iconv");
    } 

    ... Other usual methods.......

    @Override
    public void onStart() {
        super.onStart();
        //Log.v("2ndGuide", "Fragment_init: onStart");
        // Create a new global location parameters object
        mLocationRequest = LocationRequest.create();

        /*
         * Set the update interval
         */
        mLocationRequest.setInterval(LocationUtils.UPDATE_INTERVAL_IN_MILLISECONDS);

        // Use high accuracy
        mLocationRequest.setPriority(LocationRequest.PRIORITY_LOW_POWER);

        // Set the interval ceiling to one minute
        mLocationRequest.setFastestInterval(LocationUtils.FAST_INTERVAL_CEILING_IN_MILLISECONDS);

        // Note that location updates are off until the user turns them on
        mUpdatesRequested = false;

        // Open Shared Preferences
        mPrefs = this.getActivity().getSharedPreferences(LocationUtils.SHARED_PREFERENCES, Context.MODE_PRIVATE);

        // Get an editor
        mEditor = mPrefs.edit();
        // Here I just store the Locationclient reference is a global structure
        site.setLocationClient(new LocationClient(getActivity(), this, this));

        site.getLocationClient().connect();
    }

    ... other methods. ...

    /*
     * Called by Location Services when the request to connect the
     * client finishes successfully. At this point, you can
     * request the current location or start periodic updates
     */
    @Override
    public void onConnected(Bundle dataBundle) {
        // Display the connection status
        Toast.makeText(getActivity(), "Connected", Toast.LENGTH_SHORT).show();
        if (mUpdatesRequested) {
            startPeriodicUpdates();
        }

    }

    /*
     * Called by Location Services if the connection to the
     * location client drops because of an error.
     */
    @Override
    public void onDisconnected() {
        // Display the connection status
        Toast.makeText(getActivity(), "Disconnected. Please re-connect.",
                Toast.LENGTH_SHORT).show();
    }
    /*
     * Called by Location Services if the attempt to
     * Location Services fails.
     */
    @Override
    public void onConnectionFailed(ConnectionResult connectionResult) {
        /*
         * Google Play services can resolve some errors it detects.
         * If the error has a resolution, try sending an Intent to
         * start a Google Play services activity that can resolve
         * error.
         */
        if (connectionResult.hasResolution()) {
            try {
                // Start an Activity that tries to resolve the error
                connectionResult.startResolutionForResult(
                        getActivity(),
                        CONNECTION_FAILURE_RESOLUTION_REQUEST);
                /*
                 * Thrown if Google Play services canceled the original
                 * PendingIntent
                 */
            } catch (IntentSender.SendIntentException e) {
                // Log the error
                e.printStackTrace();
            }
        } else {
            /*
             * If no resolution is available, display a dialog to the
             * user with the error.
             */
            showErrorDialog(connectionResult.getErrorCode());
        }
    }


    /**
     * Show a dialog returned by Google Play services for the
     * connection error code
     *
     * @param errorCode An error code returned from onConnectionFailed
     */
    private void showErrorDialog(int errorCode) {

        // Get the error dialog from Google Play services
        Dialog errorDialog = GooglePlayServicesUtil.getErrorDialog(
                errorCode,
                getActivity(),
                LocationUtils.CONNECTION_FAILURE_RESOLUTION_REQUEST);

        // If Google Play services can provide an error dialog
        if (errorDialog != null) {

            // Create a new DialogFragment in which to show the error dialog
            ErrorDialogFragment errorFragment = new ErrorDialogFragment();

            // Set the dialog in the DialogFragment
            errorFragment.setDialog(errorDialog);

            // Show the error dialog in the DialogFragment
            errorFragment.show(getFragmentManager(), LocationUtils.APPTAG);
        }
    }

}

我的问题是，当我调用connect（）时，没有调用onConnected（）和onConnectionFailed（）回调，我也没有任何错误，但当然LocationClient.isConnected（）返回false。 / p>

所以我想知道是否应该在这个片段中调用这些回调，或者我是否真的必须放入我的主要活动。万一，我有兴趣知道为什么听众不能在这里工作。

非常感谢。