SimpleDateFormat df= new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.sss");//db中存放Date类型数据格式

Calendar cal = Calendar.getInstance();

存储时 将Calendar 转成String 类型存放

String dateTime =df.format(cal.getTime())

读取时 将数据转成Calendar

cursor.getColumnIndex(START_TIME) //获取START_TIME字段在表中的索引

cursor.getString(cursor.getColumnIndex(START_TIME)) //数据库中取出来的date字段值

Calendar cal1= Calendar.getInstance();

cal1.setTime(df.parse(cursor.getString(cursor.getColumnIndex(START_TIME)))