As you know, i can use System.currentTimeMillis() to fetch current local
time, but how to convert local time to UTC time?

the code below, i can get the timezone, utc_bias also can be got

        Time mSavedTime = new Time();
        mSavedTime.set(System.currentTimeMillis());
        TimeZone mMyTimeZone = TimeZone.getTimeZone(mSavedTime.timezone);
        int utc_bias = mMyTimeZone.getOffset(local_time);

my problem is i can't determine how to use this utc_bias:  added or minus to
current local time  to get UTC time?

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