Question

I’m a beginner of SQL.
I would like to display sqlite data on Android listview. The table has the following structure.

| _id | name | data | ...
---------------------
|   0 |   A  |  abc |
|   1 |   B  |  def |
|   2 |   C  |  ghi | ...
|   3 |   D  |  jkl |
|   4 |   E  |  mno |

So, when the user inputs [C, B, D], I want to display name and data column in user’s order.
For example,

ListView

---------------------
     C     ghi
---------------------
     B     def
---------------------
     D     jkl
---------------------

I’m torn between using ArrayAdapter and CursorAdapter now.

Should I do SELECT 3 times, store values in array, and use ArrayAdapter? Or, can fulfill my demands with SELECT once?

Thanks in advance.

Answer 1

It’ll be a bit complicated but it can be done in a single query.

SELECT * FROM yourTable
ORDER BY 
  CASE name
    WHEN 'C' THEN 0
    WHEN 'B' THEN 1
    WHEN 'D' THEN 2
  END

You’ll have to construct the query according to the user input ofcourse
.
Look more here