主要是计算月初是周几,月末是周几,然后相应的显示上一月多少天和下一月多少天。
先看一下关于日期的用到的几个工具类
/** * 获取该月天数 */public static int getCurrentMonthDay(long millSec) {Calendar calendar = Calendar.getInstance();calendar.setTimeInMillis(millSec);calendar.set(Calendar.DATE, 1);calendar.roll(Calendar.DATE, -1);int dateCount = calendar.get(Calendar.DATE);return dateCount;}/** * 获取当月第一天 */public static long getFirOfMonth(long millSec) {Calendar calendar = Calendar.getInstance();calendar.setTimeInMillis(millSec);calendar.set(Calendar.DATE, 1);return calendar.getTimeInMillis();}/** * 获取当前时间戳 */public static long getCurrentTime() {Calendar calendar = Calendar.getInstance();return calendar.getTimeInMillis();}/** * 获取上一月/下一月 */public static long getLastOrNextMonth(long millSec, int count) {Calendar calendar = Calendar.getInstance();calendar.setTimeInMillis(millSec);calendar.add(Calendar.MONTH, count);return calendar.getTimeInMillis();}/** * 格式化到月份 */public static String long2str(long millSec) {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");return sdf.format(new Date(millSec));}用一个List存放每一天,因为之前考虑到每一天有记事这些,所以封装了一个类,如果不需要的话可以直接一个时间戳就可以。
private void setCalendarList(long millSecs) {beans.clear();Calendar calendar = Calendar.getInstance();calendar.setTimeInMillis(millSecs);//int nor = today.getDay();int max = DateUtil.getCurrentMonthDay(millSecs);/** * 当月日历 */for (int i = 1; i <= max; i++) {DayBean bean = new DayBean();Calendar cc = Calendar.getInstance();cc.setTimeInMillis(millSecs);cc.add(Calendar.DAY_OF_MONTH, i - 1);setBean(bean, cc);bean.setIsCurrentMonth(true);beans.add(bean);}//上月结余int fir_day_of_week = beans.get(0).getCalendar().get(Calendar.DAY_OF_WEEK);Log.e("AAA", "week_last:" + fir_day_of_week);if (fir_day_of_week != 2) {if(fir_day_of_week == 1){for (int i = 0; i < 6; i++) {DayBean bean = new DayBean();Calendar cc = Calendar.getInstance();cc.setTimeInMillis(millSecs);cc.add(Calendar.DAY_OF_MONTH, -i -1);setBean(bean, cc);Log.e("AAA", "last:" + bean.getDay());bean.setIsCurrentMonth(false);beans.add(0, bean);}}else{for (int i = 0; i < fir_day_of_week-2; i++) {DayBean bean = new DayBean();Calendar cc = Calendar.getInstance();cc.setTimeInMillis(millSecs);cc.add(Calendar.DAY_OF_MONTH, -i-1);setBean(bean, cc);Log.e("AAA", "last:" + bean.getDay());bean.setIsCurrentMonth(false);beans.add(0, bean);}}}//下月int last_day_of_week = beans.get(beans.size() - 1).getCalendar().get(Calendar.DAY_OF_WEEK);Log.e("AAA", "week_next:" + last_day_of_week);if (last_day_of_week != 1) {for (int i = last_day_of_week; i < 8; i++) {DayBean bean = new DayBean();Calendar cc = Calendar.getInstance();cc.setTimeInMillis(millSecs);cc.add(Calendar.DAY_OF_MONTH, i - last_day_of_week);setBean(bean, cc);Log.e("AAA", "next:" + bean.getDay());bean.setIsCurrentMonth(false);beans.add(bean);}}GridViewAdapter adapter = new GridViewAdapter(this, beans);mGridView.setAdapter(adapter);}private void setBean(DayBean bean, Calendar cc) {bean.setCalendar(cc);bean.setDay(cc.get(Calendar.DAY_OF_MONTH));}设置每一天时设置了一个字段为是否为本月,如果是,则设置为黑色,否则设为灰色显示,在Adapter中的getView方法中设置即可。
@Overridepublic View getView(int position, View convertView, ViewGroup parent) {ViewHolder holder;if (convertView == null) {convertView = inflater.inflate(R.layout.item_layout, null);holder = new ViewHolder();holder.day_text = (TextView) convertView.findViewById(R.id.day_text);convertView.setTag(holder);} else {holder = (ViewHolder) convertView.getTag();}holder.day_text.setText(beans.get(position).getDay() + "");if (beans.get(position).isToday()) {holder.day_text.setBackgroundColor(Color.RED);} else {holder.day_text.setBackgroundColor(Color.WHITE);}if (beans.get(position).isCurrentMonth()) {holder.day_text.setTextColor(Color.BLACK);} else {holder.day_text.setTextColor(Color.GRAY);}return convertView;}class ViewHolder {TextView day_text;}以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。