日常 2018年6月11日21:07:22 周一

时间:2021-08-31 13:47:32

 

  1.重复执行SimpleDateFormate导致的,java.lang.IllegalArgumentException: Bad class: class java.lang.String 问题:

既然传入的begin、end已经是规范格式,就不要再 format.format(begin);了!
 /**
     * 计算两个日期之间相差多少天
     *
     * @param begin 2016-05-01 12:00
     * @param end   2016-06-01 12:00
     * @return String[]  [0]day, [1]hour, [2]minute
     */
    public static String[] getDifferMinute(String begin, String end) {
        L.w("begin: " + begin + "  end:  " + end);
        // 一天有(24*60*60*1000)毫秒
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm");
        //Bug //Caused by: java.lang.IllegalArgumentException: Bad class: class java.lang.String
//        String fromDate = format.format(begin);
//        String toDate = format.format(end);
        long from = 0, to = 0;
        try {
            from = format.parse(begin).getTime();
            to = format.parse(end).getTime();
            // 获得两个时间的毫秒时间差异
            long diff = to - from;
            // 计算差多少天
            long day = diff / nd;
            // 计算差多少小时
            long hour = diff % nd / nh;
            // 计算差多少分钟
            long min = diff % nd % nh / nm;
            return new String[]{String.valueOf(day), String.valueOf(hour), String.valueOf(min)};
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }

  2.ViewStub设置setLayoutResoure之后 inflate,会自动销毁,并将视图交给父布局管理。所以不能把几个ViewGroup交给同一个ViewStub去管理!很坑!

  3.Spinner控件调用 setOnItemSelectedListener 会自动执行一次select方法,通过调用 spinnerDutyPerson.setSelection(0, true);  屏蔽:

  //禁止OnItemSelectedListener自动调用
        spinnerDutyPerson.setSelection(0, true);
        //放到TagContainer里
        spinnerDutyPerson.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                if (cjExecutorNames.size() > 0) {
                    List<String> tags = tagContainer.getTags();
                    tags.add(cjExecutorNames.get(position));
                    LinkedHashSet<String> set = new LinkedHashSet<>(tags);
                    tags.clear();
                    tags.addAll(set);
                    tagContainer.setTags(tags);
                }
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {
            }
        });

  4.Predicate 过滤:

 private Predicate predicateString(String string) {
        Predicate ss = (s) -> s.toString().equals(string);
        return (s) -> s.toString().equals(string);
}

  5.List去重:有序LinkedHashSet、无序HashSet ,Very Good !亲测有效,可以过滤掉 List<String> 中重复的字符串:

 List<String> tags = tagContainer.getTags();
        L.d("size: " + tags.size());
        if (tags.size() > 0) {
//            tags.stream().distinct().collect(Collectors.toList());//java8
            LinkedHashSet set = new LinkedHashSet(tags);
            tags.clear();
            tags.addAll(set);
            L.d("distinct size: " + tags.size());
        } else {
            T.showLong("请添加联系人");
            return;
        }

   去重对象:

//未选中,需要HashSet去重,确定之后做即可
            HashSet<CJExecutorEntity> set = new HashSet<>();
            for (CJExecutorEntity bean : tempStates) {
                set.add(bean);
            }
            tempStates.clear();
            tempStates.addAll(set);