How to sort the CursorLoader results?

Question

I use CursorLoader to query a result, which is not the order that I want to show in the ListFramgenet. How to sort it ?

I use this to set the adapter:

Answer 1

What you're looking for is supplying a sortOrder argument something like the following:

(the ORDER BY at the start of this is implicait and you do not include it, simply included here for clarity)

ORDER BY 6366000*acos(cos(lat_a / (180/3.14169))*cos(lng_a / (180/3.14169))*cos(lat_b / (180/3.14169))*cos(lng_b / (180/3.14169)) + t2 + t3) ASC

(for this I took the answer here and inlined it - except I didn't bother with t2 and t3, because it's not going to work anyway)

Unfortunately, this is impossible in standard SQLite - there are no operators sin, or cos - or even a square root or power operator (after seeing your comment about only requiring a more simple calculation).

You can add your own functions, but that's a somewhat more complicated route.

Depending on how many rows you have, you might be alright to just read them all and then sort them yourself.