調用hashmap地圖

Question

我有一個hashmap方法是;

public HashMap<String, String> getUserDetails(){ 
     HashMap<String,String> user = new HashMap<String,String>(); 
     String selectQuery = "SELECT * FROM " + TABLE_LOGIN; 

     SQLiteDatabase db = this.getReadableDatabase(); 
     Cursor cursor = db.rawQuery(selectQuery, null); 
     // Move to first row 
     cursor.moveToFirst(); 
     if(cursor.getCount() > 0){ 
      user.put("name", cursor.getString(1)); 
      user.put("email", cursor.getString(2)); 
      user.put("uid", cursor.getString(3)); 
      user.put("created_at", cursor.getString(4)); 
     } 
     cursor.close(); 
     db.close(); 
     // return user 
     return user; 
    } 

我有一個字符串電子郵件，我想要獲得id = 10的方法的電子郵件。 如何設置電子郵件基本等於該特定字符串; String email = getUserDetails（email where ID = 10）我知道我走了，但你明白了。

Answer 1

public HashMap<String, String> getUserDetails(int id){ 
    HashMap<String,String> user = new HashMap<String,String>(); 
    String selectQuery = "SELECT * FROM " + TABLE_LOGIN + " WHERE id=" + id + ";"; 
    SQLiteDatabase db = this.getReadableDatabase(); 
    Cursor cursor = db.rawQuery(selectQuery, null); 
    // Move to first row 
    cursor.moveToFirst(); 
    if(cursor.getCount() > 0){ 
     user.put("name", cursor.getString(1)); 
     user.put("email", cursor.getString(2)); 
     user.put("uid", cursor.getString(3)); 
     user.put("created_at", cursor.getString(4)); 
    } 
    cursor.close(); 
    db.close(); 
    // return user 
    return user; 
} 

使用它：

String email = getUserDetails(10).get("email");