Merge "Prevent NPE in not attached Clock"

            filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);

            filter.addAction(Intent.ACTION_USER_SWITCHED);

            // NOTE: This receiver could run before this method returns, as it's not dispatching

            // on the main thread and BroadcastDispatcher may not need to register with Context.

            // The receiver will return immediately if the view does not have a Handler yet.

            mBroadcastDispatcher.registerReceiver(mIntentReceiver, filter,

                    Dependency.get(Dependency.TIME_TICK_HANDLER), UserHandle.ALL);

            Dependency.get(TunerService.class).addTunable(this, CLOCK_SECONDS,

            mCurrentUserId = mCurrentUserTracker.getCurrentUserId();

        }

        // NOTE: It's safe to do these after registering the receiver since the receiver always runs

        // in the main thread, therefore the receiver can't run before this method returns.

        // The time zone may have changed while the receiver wasn't registered, so update the Time

        mCalendar = Calendar.getInstance(TimeZone.getDefault());

        mClockFormatString = "";

        // Make sure we update to the current time

        updateClock();

    private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {

        @Override

        public void onReceive(Context context, Intent intent) {

            // If the handler is null, it means we received a broadcast while the view has not

            // finished being attached or in the process of being detached.

            // In that case, do not post anything.

            Handler handler = getHandler();

            if (handler == null) return;

            String action = intent.getAction();

            if (action.equals(Intent.ACTION_TIMEZONE_CHANGED)) {

                String tz = intent.getStringExtra("time-zone");

                getHandler().post(() -> {

                handler.post(() -> {

                    mCalendar = Calendar.getInstance(TimeZone.getTimeZone(tz));

                    if (mClockFormat != null) {

                        mClockFormat.setTimeZone(mCalendar.getTimeZone());

                });

            } else if (action.equals(Intent.ACTION_CONFIGURATION_CHANGED)) {

                final Locale newLocale = getResources().getConfiguration().locale;

                getHandler().post(() -> {

                handler.post(() -> {

                    if (!newLocale.equals(mLocale)) {

                        mLocale = newLocale;

                        mClockFormatString = ""; // force refresh

                    }

                });

            }

            getHandler().post(() -> updateClock());

            handler.post(() -> updateClock());

        }

    };