android7.0设置系统时间

   public void setAndroidSystemTime(Context mContext){
		String time = "2019-01-17 17:30:54"
		SimpleDateFormat simpleDateFormat = null;
        if (simpleDateFormat == null) {
            simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.getDefault());
        }
		Date date = format.parse(time);
		Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        long when = c.getTimeInMillis();
        ((AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE)).setTime(when);
    }

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系统的网络设置 看这里

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