Question

我有一个格式化的时间列表，如下所示：

00:30:00 - 01:00:00 - 。。。。二十三时30分00秒

如何从Android中的该列表中获取currentTime-（1小时）和currentTime +（3小时）之间的范围？

SimpleDateFormat df = new SimpleDateFormat("HH:mm:ss");
                    df.setTimeZone(TimeZone.getTimeZone("GTC"));
                    long now = Calendar.getInstance().getTimeInMillis();
                    Log.i("time", ""+now);


                    timeTableAdapter = new TimeTableAdapter(
                            TimeTableAdvanced.this, R.layout.timetable_item,
                            timeTableList);

                    adapterCount = timeTableAdapter.getCount();
                    for (int i = 0; i < adapterCount; i++) {

                        String inputString = timeTableList.get(i)
                                .getDepartureTime();

                        Date dat;
                        try {
                            dat = df.parse(inputString);

                            if (dat.getTime() <= now+(3*3600000) && dat.getTime() >= now-3600000 ) {
                                View item = timeTableAdapter.getView(i, null,
                                        null);
                                timetablelayout.addView(item);

                                View line = new View(TimeTableAdvanced.this);
                                line.setLayoutParams(new LinearLayout.LayoutParams(
                                        LayoutParams.MATCH_PARENT, 1));
                                line.setBackgroundColor(getResources()
                                        .getColor(R.color.black));
                                timetablelayout.addView(line);
                            }
                        } catch (ParseException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }

                    }

Answer 1

我认为这里没有任何困难。

假设您有X =以毫秒为单位的当前时间

HOUR_IN_MILLIS = 3600000
Time A = X - 1 hrs = X - HOUR_IN_MILLIS millis
Time B = X + 3 hrs = X + (3 * HOUR_IN_MILLIS) millis

如果您需要半小时间隔的范围，则迭代

for (long i = A; i <= B; i =+ HOUR_IN_MILLIS/2) { //add time to list }

Answer 2

我解决了我的问题。显然，我不仅要花时间而且还要花费几分钟来获取当前时间的毫秒数。这是解决方案：

SimpleDateFormat df = new SimpleDateFormat("HH:mm:ss");
                String date = df.format(Calendar.getInstance().getTime());
                Date now;
                long nowtime = 0;
                try {
                    now = df.parse(date);
                    nowtime=now.getTime();
                    Log.i("time", ""+now);
                } catch (ParseException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }



                timeTableAdapter = new TimeTableAdapter(
                        TimeTableAdvanced.this, R.layout.timetable_item,
                        timeTableList);

                adapterCount = timeTableAdapter.getCount();
                for (int i = 0; i < adapterCount; i++) {

                    String inputString = timeTableList.get(i)
                            .getDepartureTime();

                    Date dat;
                    try {
                        dat = df.parse(inputString);
                        Log.i("time1", ""+dat.getTime());
                        Log.i("time2", ""+nowtime);
                        if (dat.getTime() <= nowtime+(3*3600000) && dat.getTime() >= nowtime-3600000 ) {
                            View item = timeTableAdapter.getView(i, null,
                                    null);
                            timetablelayout.addView(item);

                            View line = new View(TimeTableAdvanced.this);
                            line.setLayoutParams(new LinearLayout.LayoutParams(
                                    LayoutParams.MATCH_PARENT, 1));
                            line.setBackgroundColor(getResources()
                                    .getColor(R.color.black));
                            timetablelayout.addView(line);
                        }
                    } catch (ParseException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                }

使用当前时间在格式化的时间列表中获取时间范围

2 个答案: