Android 倒计时（时间戳转换天小时分钟秒）

Posted 2023-02-16 亮亮在江湖

最近在做类似于商品购买的时间倒计时，在此记录一下，话不多少，请看效果图：

 倒计时 = 从后台获取到当前时间的时间戳  - 商品的截止时间
（备注：如果当前时间的时间戳获取手机本地的会出问题，因为调整本地时间后就造成的时间错误，所以线上环境每次取从后台获取到当前时间的时间戳）
此处涉及到时间戳和日期年月日时分秒的转换

//将时间戳转化为对应的时间  日-时-分-秒
    public static String timeConversion(long time) 
        long day = 0;
        long hour = 0;
        long minutes = 0;
        long sencond = 0;
        long dayTimp = time % (3600*24);
        long hourTimp = time % 3600;

        if(time >= 86400)
            day = time / (3600*24);
            if(dayTimp != 0)
                time = time-(day * 24 * 60 * 60);
                if(time  >= 3600 && time < 86400)
                    hour = time / 3600;
                    if (hourTimp != 0) 
                        if (hourTimp  >= 60) 
                            minutes = hourTimp / 60;
                            if (hourTimp % 60 != 0) 
                                sencond = hourTimp % 60;
                            
                         else if (hourTimp < 60)
                            sencond = hourTimp;
                        
                    
                 else if(time < 3600)
                    minutes = time / 60;
                    if (time % 60 != 0) 
                        sencond = time % 60;
                    
                
            
         else if (time  >= 3600 && time < 86400) 
            hour = time / 3600;
            if (hourTimp != 0) 
                if (hourTimp  >= 60) 
                    minutes = hourTimp / 60;
                    if (hourTimp % 60 != 0) 
                        sencond = hourTimp % 60;
                    
                 else if (hourTimp < 60)
                    sencond = hourTimp;
                
            
         else if(time < 3600)
            minutes = time / 60;
            if (time % 60 != 0) 
                sencond = time % 60;
            
        
        return (day<10?("0"+day):day) + "天" + (hour<10?("0"+hour):hour) + "时" + (minutes<10?("0"+minutes):minutes) + "分" + (sencond<10?("0"+sencond):sencond)+ "秒";
    

 //将时间字符串转为时间戳字符串
    public static Long getStringTimestamp(String time) 
        Long longTime = null;
        try 
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            longTime = sdf.parse(time).getTime() / 1000;

         catch (ParseException e) 
            e.printStackTrace();
        
        return longTime;
    

通过handler 发消息，每隔1秒钟发送一次，时间递减

@SuppressLint("HandlerLeak")
        private Handler handler = new Handler() 
            @Override
            public void handleMessage (Message msg) 
                super.handleMessage(msg);
                long sysTime = System.currentTimeMillis();
                String sysTimeStr = (String) DateFormat.format("yyyy-MM-dd HH:mm:ss", sysTime);
                tv_time.setText("当前时间-----"+sysTimeStr);

                Long currentStamp = getStringTimestamp(sysTimeStr);
                Long currentLast = endStamp - currentStamp;
                if(currentLast <= 0)
                    handler.removeMessages(0);
                    tv_last_time.setText("购买时间截止");
                    return;
                
                String lastTime = timeConversion(currentLast);
                SpannableStringBuilder ss = new SpannableStringBuilder();
                ss.append("购买截止时间："+lastTime);
                ss.setSpan(new ForegroundColorSpan(ContextCompat.getColor(MainActivity.this,R.color.color_gold)), 7, 9, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                ss.setSpan(new ForegroundColorSpan(ContextCompat.getColor(MainActivity.this,R.color.color_gold)), 10, 12, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                ss.setSpan(new ForegroundColorSpan(ContextCompat.getColor(MainActivity.this,R.color.color_gold)), 13, 15, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                ss.setSpan(new ForegroundColorSpan(ContextCompat.getColor(MainActivity.this,R.color.color_gold)), 16, 18, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                tv_last_time.setText(ss);

                handler.sendEmptyMessageDelayed(0, 1000);
            
        ;

最后在页面销毁时移除掉handler

@Override
    protected void onDestroy() 
        super.onDestroy();
        handler.removeCallbacksAndMessages(null);
    

    @Override
    protected void onPause() 
        super.onPause();
        handler.removeMessages(0);
    

希望本篇文章对于有需要的同学给与帮助，欢迎讨论！附上代码demo