import com.google.samples.apps.iosched.util.WiFiUtils; //导入依赖的package包/类
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
        @Nullable Bundle savedInstanceState) {
    View root = inflater.inflate(R.layout.info_event_frag, container, false);
    mWiFiNetworkText = (TextView) root.findViewById(R.id.wifi_network_value);
    mWiFiPasswordText = (TextView) root.findViewById(R.id.wifi_password_value);
    mWiFiSave = (Button) root.findViewById(R.id.wifi_save);
    mWiFiSave.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            boolean saved = WiFiUtils.installConferenceWiFi(getContext());
            Snackbar.make(getView(), saved ? R.string.wifi_install_success
                    : R.string.wifi_install_error_message, Snackbar.LENGTH_SHORT).show();
        }
    });
    mSandboxEventContent = (EventView) root.findViewById(R.id.sandbox_event);
    mCodeLabsEventContent = (EventView) root.findViewById(R.id.codelabs_event);
    mOfficeHoursEventContent = (EventView) root.findViewById(R.id.officehours_event);
    mAfterHoursEventContent = (EventView) root.findViewById(R.id.afterhours_event);
    mSandboxEventContent.setEventViewClickListener(this);
    mCodeLabsEventContent.setEventViewClickListener(this);
    mOfficeHoursEventContent.setEventViewClickListener(this);
    mAfterHoursEventContent.setEventViewClickListener(this);
    return root;
}
 

import com.google.samples.apps.iosched.util.WiFiUtils; //导入依赖的package包/类
private void setupWifiOfferCard(final MessageCardView card) {
    card.setText(getString(TimeUtils.hasConferenceStarted(getActivity()) ?
            R.string.question_setup_wifi_after_i_o_start :
            R.string.question_setup_wifi_before_i_o_start));
    card.setButton(0, getString(R.string.no_thanks), CARD_ANSWER_NO,
            false, 0);
    card.setButton(1, getString(R.string.setup_wifi_yes), CARD_ANSWER_YES,
            true, 0);
    final Context context = getActivity().getApplicationContext();
    card.setListener(new MessageCardView.OnMessageCardButtonClicked() {
        @Override
        public void onMessageCardButtonClicked(final String tag) {
            card.dismiss(true);

            // post delayed to give card time to animate
            mHandler.postDelayed(new Runnable() {
                @Override
                public void run() {
                    if (CARD_ANSWER_YES.equals(tag)) {
                        WiFiUtils.showWiFiDialog(SessionsFragment.this.getActivity());
                    } else {
                        PrefUtils.markDeclinedWifiSetup(context);
                    }
                }
            }, CARD_DISMISS_ACTION_DELAY);
        }
    });
    card.show();
}
 

import com.google.samples.apps.iosched.util.WiFiUtils; //导入依赖的package包/类
/**
 * @return the next message card that should be displayed to the user
 */
public static MessageData getNextMessageCard(@NonNull Context context) {
    if (shouldShowCard(context, ConfMessageCard.SIGN_IN_PROMPT)) {
        return notSignedInCard();
    }
    if (shouldShowCard(context, ConfMessageCard.SESSION_NOTIFICATIONS)) {
        return getNotificationsOptInMessageData();
    }
    if (RegistrationUtils.isRegisteredAttendee(context) ==
            RegistrationUtils.REGSTATUS_REGISTERED) {
        // Users are required to opt in or out of whether they want conference message cards
        if (!ConfMessageCardUtils.hasAnsweredConfMessageCardsPrompt(context)) {
            // User has not answered whether they want to opt in.
            // Build a opt-in/out card.
            return getConferenceOptInMessageData();
        }

        if (ConfMessageCardUtils.isConfMessageCardsEnabled(context)) {
            LOGD(TAG, "Conf cards Enabled");
            // User has answered they want to opt in AND the message cards are enabled.
            ConfMessageCardUtils.enableActiveCards(context);

            // Note that for these special cards, we'll never show more than one at a time
            // to prevent overloading the user with messagesToDisplay.
            // We want each new message to be notable.
            if (shouldShowCard(context, ConfMessageCard.WIFI_PRELOAD)) {
                // Check whether a wifi setup card should be offered.
                if (WiFiUtils.shouldOfferToSetupWifi(context, true)) {
                    // Build card asking users whether they want to enable wifi.
                    return getWifiSetupMessageData();
                }
            }

            LOGD(TAG, "Simple cards");
            List<ConfMessageCard> simpleCards
                    = ConfMessageCard.getActiveSimpleCards(context);
            if (!simpleCards.isEmpty()) {
                return getSimpleMessageCardData(simpleCards.get(0));
            }
        }
    }
    return null;
}