If B4XTable or xChart are added separately in the CustomiListView, there will be no error. If both B4XTable and xChart are added at the same time, there will be a memory overflow phenomenon.I cann't release objects. Perhaps my code was not written correctly，could anybody give me some advice to fix to the problem.
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B4J Question CustomiListView out of memory
- Thread starter fengce
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Comment the line : Sleep(0)
300 iterations of simultaneous xChart and B4XTable. No crash. If you are still having trouble, I can upload you the project
B4A: It took 64 sec on tablet when that line is not commented .
If we comment the line, it took: 15 secs
B4J: On a pc that is not really fast: 6 sec when commented sleep(0). and 32 secs when not commented
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Thanks for Brian Michael and Mahares .I'm glad you replied to me.
I havn't fixed the problem yet,if I Comment the line : Sleep(0) ,the memory will grow bigger and bigger till crash,if not Comment the line : Sleep(0), in the debug mode, the IDE will report the errors. What should I do. waiting for help. Thank you for replying to me
I havn't fixed the problem yet,if I Comment the line : Sleep(0) ,the memory will grow bigger and bigger till crash,if not Comment the line : Sleep(0), in the debug mode, the IDE will report the errors. What should I do. waiting for help. Thank you for replying to me
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The project you posted in the previous post is very different from the project in post #1 you have. Nevertheless, I modified your latest project you have in post #4 and made a complete B4J project that displays the xCharts and the B4XTables inside the XClv ( 500 of them) at the same time. I used lazy loading and you will see in the attached project, it shows you both instantly. I used 500 iterations like you wanted in your previous post.
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Dear Sir,
Thank you very much for modifying the code, which has greatly inspired me.You are a warm and friendly person. Your help has deepened my understanding of b4x. In addition, I would like to ask how to release items loaded in the customlistview（500 iterations and VISIBLE in the CLV） and reduce memory usage. In my project, I can remove these items, but I cannot free up memory usage. Can you give me some suggestions? Thanks again!
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I'v tested your project , and if I only iterate 500 times in XCLV, there will be no errors and the memory usage is not high,It works good what i want. However, if the scrollbar is moved to display items, the memory usage will increase more and more。As the number of items displaying increased ， an error will be shown in the IDE logs and the program is no longer working.
Many thanks for your kind help!
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I have not experienced that error you reported in your previous post. I scrolled several times and no memory problem. That is the purpose of lazy loading . it releases memory. Maybe someone who has downloaded it and seen what you saw can report. See screenshot. I was able to go to the 500th item and scroll back to item 1 several times with no problems
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I captured the screen,please have a look. I wanna reduce the memory usage by using clv.clear,but no effection,don't know how to deal with the problem.What I want to achieve is to completely release resources when I'm not using CLV. thanks for your reply,best regards!
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In programming it is good to work wisely.
I think loading all the data at the same time is a bad idea since as you can see it clutters the device running it.
Imagine if that is with your PC that has good features vs a not so good computer.
You should create pagination and load a delimited number of data at a time.
This is just a piece of advice, I created an app where I had the same problem until I started working in a segmented way.
You can also try with B4X PreOptimizedCLV: https://www.b4x.com/android/forum/t...loading-extension-for-xcustomlistview.115289/
I think loading all the data at the same time is a bad idea since as you can see it clutters the device running it.
Imagine if that is with your PC that has good features vs a not so good computer.
You should create pagination and load a delimited number of data at a time.
This is just a piece of advice, I created an app where I had the same problem until I started working in a segmented way.
You can also try with B4X PreOptimizedCLV: https://www.b4x.com/android/forum/t...loading-extension-for-xcustomlistview.115289/
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Thank you for your suggestion. I will improve my project according to the ideas you provided. Thank you again for your enthusiastic response these days, which has boosted my confidence in using b4x to develop programs.
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@Brian Michael, you can be of big help to the OP to test the project I posted in post #5 to see if you experience the same issues the OP has had, because I did not see any memory issues when I modified it and tested it extensively. Can you report back even with your changes if you think a code change will eliminate the problem the OP faced.. 500 items is a lot but with lazy loading , it is doable. It is not unsurmountable.
A word of advice to the OP, is perhaps he should run it in release mode and see if his memory problem still persists for him
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