Home/ Questions/Q 8708377
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-13T04:07:28+00:00

I have managed to successfully write a service that downloads data from an RSS

  • 0

I have managed to successfully write a service that downloads data from an RSS feed, parses it, and save it to a database. I also have an activity fragment which uses the cursor loader technique to retrieve all data rows and displays them on screen in a horizontal listview I scavenged off the internet.

My next mission is to modify the activity so that I can continually query for the next x number of rows every time the user scrolls to near the end of the listview and add them to the listview. Technically my data is small enough that if I showed 10 rows at startup, I could probably just query for 20 and reset the adapter – but it seems silly to have to re-query the same rows repeatedly.

So essentially my main question is: how best would I combine the currently held listview contents populated with a Cursor/CursorAdapter with the results of a fresh query using the LoaderCallbacks?

Secondly, what is the correct syntax for the limit parameter of the SQLiteQueryBuilder? I have tried many variations although I think a string of “offset, maxrows” is correct? No matter what I provide though I am always getting 0 from getCount() on my cursor.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Use an ArrayList of your items inside your Adapter, when you have new items to display, just create a method to insert them into the ArrayList.

    Question about SQL you can find on that link http://developer.android.com/reference/android/database/sqlite/SQLiteQueryBuilder.html
    you have to add the limit on then method buildQuery, if that doesn’t work, please paste here your code

    • 0