Android Question Data and image download speed in an application similar to WhatsApp web

jose luis gudino

Active Member
Licensed User
Longtime User
We are developing an application similar to WhatsApp web, everything is working well, except when it brings me the information from the database when I log in, depending on the information it has, the process is slow. I have observed that when you open a new WhatsApp or Telegram session on a PC the images and chats refresh almost immediately, does anyone have an idea how they do it? greetings. Thank you very much in advance
 

Attachments

  • Screenshot 2024-05-15 095011.png
    471.2 KB · Views: 105
Sort by date Sort by votes

Sagenut

Expert
Licensed User
Longtime User
I think that the small thumbnails are so small that the download is lightning fast.
When you click to enlarge you can notice that it needs a couple of seconds to retrieve the full size image.
So for every avatar you should have 2 files:
One for thumbnail and one for full size.
 
Upvote 0

jose luis gudino

Active Member
Licensed User
Longtime User
Hello, I like that idea, I'm going to try downloading the data without downloading the image, to see if the download speed improves, I compress the images even more, I have a function that compresses them.
 
Upvote 0

Sagenut

Expert
Licensed User
Longtime User
You could save the avatar images like this (just an idea):
MyAvatar.jpg as the Full Size image at 1200x1200 resolution.
MyAvatar_t.jpg as the thumbnail at 150x150 resolution.
When scrolling the contacts list you load the thumbnails.
When needed request the full size image.
 
Upvote 0

jose luis gudino

Active Member
Licensed User
Longtime User
The images are already resolved, they load very quickly, now the issue is that I have to make the chat function like WhatsApp, that is, it only loads the latest conversions and that is what is shown and then as you scroll The customlistviews are reloaded upwards, it is as if they were loaded from the bottom up, can I explain the idea?
 
Upvote 0

Sagenut

Expert
Licensed User
Longtime User
Load your items in reverse, with InsertAt(0) and jump to the last item of the clv.
 
Upvote 0

jose luis gudino

Active Member
Licensed User
Longtime User
Hello everyone, this is the solution.

[B4X] CLVBackwards - xCLV extenstion for lists that grow backwards

This class can be helpful in esoteric cases where the list grows up instead of down. Think of a chat app where you start with the most recent messages and when the user scrolls up, more older messages are added to the top. The challenge here is to add items without making the list jump back and...
www.b4x.com
 
Upvote 0
You must log in or register to reply here.

Similar Threads

O
  • Question
Android Question With B4X, how can you download or read files received by WhatsApp?
Replies
1
Views
752
Erel
  • Article
Android Tutorial Full private chat and multi-chat (similar to Whatsapp)
2
Replies
29
Views
11K
Serge Nova
A
  • Question
Android Question is it possible to create a chat app similar to WhatsApp without a central server?
Replies
1
Views
1K
Erel
  • Article
Android Example Audios for WhatsApp (CLV with 2 columns)
Replies
9
Views
7K
Ferbis
  • Article
B4A Library WhatsApp Library
2 3
Replies
54
Views
48K
MarcoRome
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…