List 和MAP的区别

Posted 2022-05-12 黄毛火烧雪下

List 和MAP的区别

需求：返回的List卡片，某些卡片需要显示倒计时，解决方法：需要显示显示倒计时，则创建相对于的倒计时，当继续执行响应倒计时则不需要重新创建，更具list的标识即可判断

备注：HashMap key和value一一对应倒，key对应的value为null，则创建

    /** 倒计时集合. */
    private var timerList: MutableList<FixCountDownTimer?> = mutableListOf()
    //标记哪些卡片带有倒计时功能
    private var timerPositionList = arrayListOf<Int>()
  	private fun initTime(
        start: Boolean = false,
        tvCountTime: TextView,
        timeInter: Long,
        cardPosition: Int
    ) 
        //未标记有倒计时功能的时候执行
        if (!timerPositionList.contain(cardPosition) ) 
            tvCountTime?.text = spannableStringBuilder(getGlobalContext()) 
                append(getString(R.string.string_count_time))
                append((timeInter).formatToDDHHString())
            
            //添加指定卡片到标记集合
            timerPositionList.add(cardPosition)
            //添加指定卡片的倒计时到倒计时集合
            timerList.add(object : FixCountDownTimer(timeInter, 1000L) 
                override fun onFinish() 
                    //请求接口，重新小助手
                    viewModel.refresh()
                    cancel()
                

                override fun onTiack(millisUntilFinished: Long) 
                    tvCountTime?.text = spannableStringBuilder(getGlobalContext()) 
                        append(getString(R.string.string_count_time))
                        append((millisUntilFinished).formatToDDHHString())
                    
                
            )
            if (start) 
                //开启指定倒计时
                timerList[timerPositionList.indexOf(cardPosition)]?.setCurrentTime(timeInter)
                timerList[timerPositionList.indexOf(cardPosition)]?.start()
            
        

    

 private var timerMap: HashMap<Int, FixCountDownTimer>? = hashMapOf()
 private fun initTime(
        start: Boolean = false,
        tvCountTime: TextView,
        timeInter: Long,
        cardPosition: Int
    ) 
        //未标记有倒计时功能的时候执行
        if (timerMap?.get(cardPosition) == null) 
            tvCountTime?.text = spannableStringBuilder(getGlobalContext()) 
                append(getString(R.string.string_count_time))
                append((timeInter).formatToDDHHString())
            
            var fixCountDownTimer = object : FixCountDownTimer(timeInter, 1000L) 
                override fun onFinish() 
                    //请求接口，重新小助手
                    viewModel.refresh()
                    cancel()
                

                override fun onTick(millisUntilFinished: Long) 
                    tvCountTime?.text = spannableStringBuilder(getGlobalContext()) 
                        append(getString(R.string.string_count_time))
                        append((millisUntilFinished).formatToDDHHString())
                    
                
            
            timerMap?.set(cardPosition, fixCountDownTimer)
            if (start) 
                //开启指定倒计时
                timerMap?.get(cardPosition)?.setCurrentTime(timeInter)
                timerMap?.get(cardPosition)?.start()