private void selectGroup() {
    // receive a list of group
    selectGroups = Group.getMyGroups();
    final String[] groupsArray = new String[selectGroups.size()];
    for (int i = 0; i < selectGroups.size(); i++) {
      groupsArray[i] = selectGroups.get(i).getName();
    }

    AlertDialog.Builder builder1 = new AlertDialog.Builder(OfferRide.this);
    builder1.setTitle("Select Group");
    builder1.setItems(
        groupsArray,
        new DialogInterface.OnClickListener() {
          @Override
          public void onClick(DialogInterface dialog, int position) {
            btnSelectEvent.setEnabled(false);
            isGroup = true;
            // Toast.makeText(getApplicationContext(), "You have selected" + groupsArray[position],
            // Toast.LENGTH_SHORT).show();
            groupId = selectGroups.get(position).getGroupId();
            groupName = selectGroups.get(position).getName();
            Toast.makeText(
                    getApplicationContext(), "You have selected " + groupName, Toast.LENGTH_SHORT)
                .show();
          }
        });
    AlertDialog alertDialog = builder1.create();
    alertDialog.show();
  }
  @Override
  protected void onRestart() {
    super.onRestart();
    // Load all groups and events to be available for offer and search rides
    Group.loadGroups(this);
    Event.loadEvents(this);

    // refresh rides
    activityFragment.sendGetRidesRequest(GETUSER_RELAVENT_RIDE_URL);

    if (!mGoogleApiClient.isConnected()) {
      mGoogleApiClient.connect();
    }
  }
  @Override
  public void onConnected(Bundle bundle) {
    // onConnected indicates that an account was selected on the device, that the selected
    // account has granted any requested permissions to our app and that we were able to
    // establish a service connection to Google Play services.
    Log.d(TAG, "onConnected:" + bundle);
    mShouldResolve = false;

    // Load all groups and events to be available for offer and search rides
    Group.loadGroups(this);
    Event.loadEvents(this);

    // Show the signed-in UI
    showSignedInUI();
  }