Android9.0系统时间systemUI显示上下午

1、vendor\mediatek\proprietary\packages\apps\SystemUI\src\com\android\systemui\statusbar\policy\Clock.java

    public Clock(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        TypedArray a = context.getTheme().obtainStyledAttributes(
                attrs,
                R.styleable.Clock,
                0, 0);
        try {
            mSystemUIFactoryBase = OpSystemUICustomizationFactoryBase.getOpFactory(context);
            mStatusBarExt = mSystemUIFactoryBase.makeSystemUIStatusBar(context);
            ///2020.02.26 modefied by lwz
            //mAmPmStyle = mStatusBarExt.getClockAmPmStyle(a.getInt(R.styleable.Clock_amPmStyle,AM_PM_STYLE_GONE));
            mAmPmStyle = mStatusBarExt.getClockAmPmStyle(a.getInt(R.styleable.Clock_amPmStyle,AM_PM_STYLE_NORMAL));
            ///end
            mShowDark = a.getBoolean(R.styleable.Clock_showDark, true);
            mNonAdaptedColor = getCurrentTextColor();
        } finally {
            a.recycle();
        }
        mCurrentUserTracker = new CurrentUserTracker(context) {
            @Override
            public void onUserSwitched(int newUserId) {
                mCurrentUserId = newUserId;
            }
        };
    }

2、vendor\mediatek\proprietary\packages\apps\SystemUI\src\com\android\keyguard\KeyguardStatusView.java

    private static final class Patterns {
        static String clockView12;
        static String clockView24;
        static String cacheKey;

        static void update(Context context) {
            final Locale locale = Locale.getDefault();
            final Resources res = context.getResources();
            final String clockView12Skel = res.getString(R.string.clock_12hr_format);
            final String clockView24Skel = res.getString(R.string.clock_24hr_format);
            final String key = locale.toString() + clockView12Skel + clockView24Skel;
            if (key.equals(cacheKey)) return;

            clockView12 = DateFormat.getBestDateTimePattern(locale, clockView12Skel);
            // CLDR insists on adding an AM/PM indicator even though it wasn't in the skeleton
            // format.  The following code removes the AM/PM indicator if we didn't want it.
            ///2020.02.26 modefied by lwz
            /*if (!clockView12Skel.contains("a")) {
                clockView12 = clockView12.replaceAll("a", "").trim();
            }*/
            ///end
            clockView24 = DateFormat.getBestDateTimePattern(locale, clockView24Skel);

            // Use fancy colon.
            clockView24 = clockView24.replace(':', '\uee01');
            clockView12 = clockView12.replace(':', '\uee01');

            cacheKey = key;
        }
    }