在RecyclerView適配器中顯示錯誤的日期

在這裏我比較兩個日期後顯示消息上面的消息。如果我顯示每個項目的日期，它工作正常。但是當我試圖顯示Today,Yesterday和date時，它總是隻顯示date。這裏日期沒有錯，但是它的格式日期錯了。在RecyclerView適配器中顯示錯誤的日期

SimpleDateFormat simpleDateFormat = new SimpleDateFormat("MMM dd, yyyy hh:mm:ss"); 
    try { 
     Date current_itemDate = simpleDateFormat.parse(chatMessage.getDateTime()); 

     DateFormat outputFormat = new SimpleDateFormat("hh:mm a"); 
     Date date = simpleDateFormat.parse(chatMessage.getDateTime()); 
     holder.timeTextView.setText(outputFormat.format(date)); 
     long previousTs = 0; 
     if (position > 0) { 
      ChatMessage pm = chatMessages.get(position - 1); 
      previousTs = simpleDateFormat.parse(pm.getDateTime()).getTime(); 
     } 
     setTimeTextVisibility(current_itemDate.getTime(), previousTs, holder.textViewTimePeriod, 
       holder.dividerTop); 

    } catch (ParseException e) { 
     e.printStackTrace(); 
    }

我使用的邏輯，用於示出具有日期或天 TextView

在下面提及。請讓我知道如果我做錯了什麼。

private void setTimeTextVisibility(long now_tm, long msg_tm, TextView timeText, View dividerTop) { 
    Calendar now_calendar = Calendar.getInstance(); 
    Calendar msg_calendar = Calendar.getInstance(); 
    now_calendar.setTimeInMillis(now_tm); 
    msg_calendar.setTimeInMillis(msg_tm); 
    boolean sameDay = now_calendar.get(Calendar.YEAR) == msg_calendar.get(Calendar.YEAR) && 
      now_calendar.get(Calendar.MONTH) == msg_calendar.get(Calendar.MONTH) 
      && now_calendar.get(Calendar.DAY_OF_MONTH) == msg_calendar.get(Calendar.DAY_OF_MONTH); 
    if (msg_tm == 0) { 
     timeText.setVisibility(View.VISIBLE); 
     dividerTop.setVisibility(View.VISIBLE); 
     if (now_calendar.get(Calendar.DATE) == msg_calendar.get(Calendar.DATE)) { 
      timeText.setText("Today"); 
     } else if (!sameDay) { 
      timeText.setText("Yesterday"); 
     } else { 
      timeText.setText("" + new SimpleDateFormat("dd MMM, yyyy").format(new Date(now_tm))); 
     } 
    } else { 
     if (sameDay) { 
      timeText.setVisibility(View.GONE); 
      dividerTop.setVisibility(View.GONE); 
      timeText.setText(""); 
     } else { 
      timeText.setVisibility(View.VISIBLE); 
      dividerTop.setVisibility(View.VISIBLE); 
      timeText.setText("Today"); 
     } 

    } 
}

來源

2017-08-30 Anshul Tyagi

嘗試將您的日期轉換爲Millis，然後比較使用這些<,>,<=,>=,==,!=運營商或查看link

.after用來比較的日期

來源

2017-08-30 05:36:13

是的，它是一個很好的方法，我也使用'.before'函數改進了我的代碼片段。 –

在這裏我想告訴其他開發人員我們如何能夠顯示諸如whatsapp應用程序之類的消息的前一天。

private void setTimeTextVisibility(long now_tm, long msg_tm, TextView timeText, View dividerTop) { 
    Date nowDate = new Date(); 
    nowDate.setTime(now_tm); 
    Date msgDate = new Date(); 
    msgDate.setTime(msg_tm); 
    Calendar now_calendar = Calendar.getInstance(); 
    now_calendar.setTimeInMillis(now_tm); 
    Calendar now = Calendar.getInstance(); 
    Calendar msg_calendar = Calendar.getInstance(); 
    msg_calendar.setTimeInMillis(msg_tm); 
    if (msg_tm == 0) { 
     timeText.setVisibility(View.VISIBLE); 
     dividerTop.setVisibility(View.VISIBLE); 
     if (DateUtils.isToday(now_calendar.getTimeInMillis())) { 
      timeText.setText("Today"); 
     } else if (now.get(Calendar.DATE) - now_calendar.get(Calendar.DATE) == 1) { 
      timeText.setText("Yesterday"); 
     } else 
      timeText.setText("" + new SimpleDateFormat("dd MMM, yyyy").format(new Date(now_tm))); 
    } else { 
     if (msgDate.before(nowDate)) { 

      boolean sameDay = now_calendar.get(Calendar.YEAR) == msg_calendar.get(Calendar.YEAR) && 
        now_calendar.get(Calendar.MONTH) == msg_calendar.get(Calendar.MONTH) 
        && now_calendar.get(Calendar.DAY_OF_MONTH) == msg_calendar.get(Calendar.DAY_OF_MONTH); 
      Log.e("YESTERDAY", (now.get(Calendar.DATE) - msg_calendar.get(Calendar.DATE) == 1) + ""); 
      if (sameDay) { 
       timeText.setVisibility(View.GONE); 
       dividerTop.setVisibility(View.GONE); 
       timeText.setText(""); 
      } else { 
       timeText.setVisibility(View.VISIBLE); 
       dividerTop.setVisibility(View.VISIBLE); 
       if (DateUtils.isToday(now_calendar.getTimeInMillis())) { 
        timeText.setText("Today"); 
       } else if (now.get(Calendar.DATE) - now_calendar.get(Calendar.DATE) == 1) { 
        timeText.setText("Yesterday"); 
       } else { 
        timeText.setText("" + new SimpleDateFormat("dd MMM, yyyy").format(new Date(now_tm))); 
       } 
      } 
     } else { 
      timeText.setVisibility(View.GONE); 
      dividerTop.setVisibility(View.GONE); 
      timeText.setText(""); 
     } 
    } 


}

來源

2017-09-05 03:43:36

在RecyclerView適配器中顯示錯誤的日期

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