2017-04-19 3 views
0

我已經經歷了無數次的帖子,但仍然無法達到預期的效果。Android SQLite日期查詢

我的日期/時間戳作爲字符串存儲在SQLite數據庫,其中一個看起來像:太陽4月16日零時26分33秒GMT + 01:00 2017年

我想實現是隻檢索從最近48小時(現在到2天前)存儲在數據庫中的項目。下面的代碼,我已經放在一起,繼續返回超過48小時/ 2天的結果。

public Cursor searchInboxEmails(String search, String twoDaysAgo, String today) throws SQLException { 

    Cursor cursor = null; 

    try { 
     if (search != null && !search.trim().isEmpty()) { 

      String received = "Received"; 
      search = "%" + search + "%"; 

      String query = "SELECT * FROM " + TABLE_NAME_1 
        + " WHERE " + MESSAGE_TYPE + " IN (?)" 
        + " AND " + FROM_EMAIL + " LIKE (?) OR " + CC_EMAIL + " LIKE (?) OR " 
        + SUBJECT + " LIKE (?) OR " + MESSAGE + " LIKE (?)" 
        + " AND " + "DATETIME(" + DATE_RECEIVED + ") BETWEEN DATETIME(?) AND DATETIME(?)" 
        + " ORDER BY " + _ID + " DESC"; 

      String[] params = {received, search, search, search, search, twoDaysAgo, today}; 
      cursor = database.rawQuery(query, params); 

      if (cursor != null) { 
       cursor.moveToFirst(); 
      } 
     } 

    } catch (Exception e) { 
     e.printStackTrace(); 
    } 
    return cursor; 
} 

值「twoDaysAgo」和「今天」也格式的字符串,看起來一樣的存儲字符串(「DATE_RECEIVED」)。獲得所需功能的任何幫助都是非常有幫助的。


編輯: 我增加了一個附加列「時間戳」節省大紀元值(例如1492337028)及以下功能的偉大工程(只顯示了時間戳後事項):

String received = "Received"; 
     String query = "SELECT * FROM " + TABLE_NAME_1 
       + " WHERE " + MESSAGE_TYPE + " IN (?)" 
       + " AND DATETIME(" + TIMESTAMP + ") >= DATETIME(?)" 
       + " ORDER BY " + TIMESTAMP + " DESC"; 

     String[] params = {received, twoDaysAgo}; 
     cursor = database.rawQuery(query, params); 

但是,當試圖在時間戳記之後搜索項目時,它會在時間戳記之前返回項目,因此如何修改以下函數以僅搜索時間戳記之後的項目?

String received = "Received"; 
      search = "%" + search + "%"; 

      String query = "SELECT * FROM " + TABLE_NAME_1 
        + " WHERE " + MESSAGE_TYPE + " IN (?)" 
        + " AND " + FROM_EMAIL + " LIKE (?) OR " + CC_EMAIL + " LIKE (?) OR " 
        + SUBJECT + " LIKE (?) OR " + MESSAGE + " LIKE (?)" 
        + " AND DATETIME(" + TIMESTAMP + ") >= DATETIME(?)" 
        + " ORDER BY " + TIMESTAMP + " DESC"; 

      String[] params = {received, search, search, search, search, twoDaysAgo}; 
      cursor = database.rawQuery(query, params); 
+0

請勿在編輯的解決方案中使用DATETIME(),然後檢查它是否有效。 –

回答

0

你有兩個選擇來做你所要求的。

第一個選項:將DATE_RECEIVED的數據類型更改爲INTEGER,然後以毫秒爲單位將其初始化。對於twoDaysAgo和今天在params上做同樣的事情;將它們轉換爲毫秒的時間。現在你的查詢應該可以工作

第二個選項:檢查this的問題。您可能需要更改您的時間戳記格式,但我不確定。

+0

我已經添加了一個額外的列「TIMESTAMP」作爲INTEGER - 請參閱我的更新問題。 –