Effective activity List

Question

Hi, Iam trying to make my Activity List more effective. I have an Activity List in my app, on every call its going to the database collecting some information and show it on the screen(as List).

so basiclly everytime you finish and re-call that list, it's calling onCreate.. again and again.. my problem here is with the allocation i am trying to reduce!

for example i have an Arraylist which is being allocated every time on the onCreate Method of my activity list, and many more allocations which i do onCreate.

i find it slowing my program very much, my program is very un-stable, and i try to reach to some performances... any idea how can i avoid this onCreate everytime i re-call my Activity List? mybe another technics to reduce re-allocations? Thanks, Idan.

Answer 1

What about making your Arraylist static, then inside onCreate() check to see if your Arraylist is null - if it is do the hard work, otherwise just leave it alone.

Answer 2

If you're fetching data from SQLite to put in a ListView, return the data as a Cursor and create a custom CursorAdapter to work with the list. It'll be more efficient than returning an ArrayList of objects (I assume that's what you're doing).