Android获取本周本月本年的第一天和最后一天

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获取本周的第一天和最后一天：

SimpleDateFormat dateFormater = new SimpleDateFormat("yyyy-MM-dd");Calendar cal = Calendar.getInstance();cal.set(Calendar.DAY_OF_WEEK, 1);cal.getTime();start_time.setText(dateFormater.format(cal.getTime()) + "");cal.set(Calendar.DAY_OF_WEEK,cal.getActualMaximum(Calendar.DAY_OF_WEEK));end_time.setText(dateFormater.format(cal.getTime()));

获取本月的第一天和最后一天：

SimpleDateFormat dateFormater = new SimpleDateFormat("yyyy-MM-dd");Calendar cal = Calendar.getInstance();cal.set(Calendar.DAY_OF_MONTH, 1);cal.getTime();start_time.setText(dateFormater.format(cal.getTime()) + "");cal.set(Calendar.DAY_OF_MONTH,cal.getActualMaximum(Calendar.DAY_OF_MONTH));end_time.setText(dateFormater.format(cal.getTime()));

获取本年的第一天和最后一天：

SimpleDateFormat dateFormater = new SimpleDateFormat("yyyy-MM-dd");Calendar cal = Calendar.getInstance();cal.set(Calendar.DAY_OF_YEAR, 1);cal.getTime();start_time.setText(dateFormater.format(cal.getTime()) + "");cal.set(Calendar.DAY_OF_YEAR,cal.getActualMaximum(Calendar.DAY_OF_YEAR));end_time.setText(dateFormater.format(cal.getTime()));

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