Dismiss Notice

REGISTRATION IS AFTER ADMIN ACTIVATION

DONATIONS WITH PAYPAL CLICK TO BUTTON

1 MONTH VIP - 5$; 3 MONTHS VIP - 10$; 6 MONTHS VIP - 20$; 1 YEAR VIP - 30$; 2 YEARS VIP - 50$; GOLD USER FOR LIFE VIP - 150$

DONATIONS WITH Bitcoin Address:3NRs3CK3fhXifrNYxHEZKpETDd9vNLMsMD

Dismiss Notice
The registration is approved by the Administrator. It takes about 1 day to approve your registration
Dismiss Notice
For open hidden message no need write thanks, thank etc. Enough is click to like button on right side of thread.

Threaded Progress Bar Image Loader For Delphi XE5

Discussion in 'Delphi Android And IOS' started by N0body, Mar 6, 2014.

  1. N0body
    Online

    N0bodyN0body is a Verified Member DelphiFan Administrator Staff Member DF Staff

    [​IMG]

    I put together this Delphi XE5 Firemonkey Frame object called AsyncImageLoader which implements a threaded HTTP image loader with a progress bar. If you want to load up a TListBox with an RSS feed you have to create an TImage and download each image manually which will bHIDE-THANKS the GUI of your app. AsyncImageLoader shows one way to solve this problem. The code should work cross platform on Android, IOS, Windows, and IOS. Once you tell AsyncImageLoader to load an image it will display a progress bar until the image has been downloaded and loaded. Instagram uses a similar progress bar style within their app when they load images into your feed.

    Another feature of AsyncImageLoader is that it can either pool the HTTP request components and re-use them the next time you load an image with the Frame or it can create the HTTP request components on each request (by setting Pooled to False). If you are only ever going to load an image once you can probably save memory by turning off pooling. Lastly you can load up the URL property of the Frame with the URL that you want to load and then use your own queuing system to load the images (with the Get procedure) when the images become visible (or one at a time). The threading is based on anonymous threads so there is also a new thread created and terminated for each image request.

    There are other solutions out there for asynchronous image loading but I haven’t seen any that implement a progress bar. If you don’t need the progress bar and just want a threaded image loading queue check out TImageLoader.

    To use AsyncImageLoader you should include the uAsyncImageLoader into your project, select Frames from the component palette, and choose AsyncImageLoader from the popup box.

    Download Here
     

Share This Page

Laws
Our website, law, laws, copyright and aims to be respectful of individual rights. Our site, as defined in the law of 5651 serves as a provider of space. According to the law, contrary to the law of site management has no obligation to monitor content. Therefore, our site has adopted the principle of fit and remove. Works are subject to copyright laws and is shared in a manner that violated their legal rights, or professional associations, rights holders who, adsdelphi@gmail.com I can reach us at e-mail address. Complaints considered to be infringing on the examination of the content will be removed from our site.
Donate Help To Us and Be VIP
DONATIONS WITH PAYPAL CLICK TO BUTTON
6 MONTHS VIP - 20$; 1 YEAR VIP - 30$; 2 YEARS VIP - 50$; GOLD USER FOR LIFE VIP - 150$
Social Block