Java Development

[user17]

Hi All,

             I am implementing lazy loading. In that if i scroll screen vertically, in that stoped  position value i need to  access and i need to download the images for that. how to find the current scrolled details(i mean stoped position).

Thanks

[simon_hain]

i guess
http://www.blackberry.com/developers/docs/7.1.0api/net/rim/device/api/ui/ScrollView.html#getVertical...
?

[user17]

Hi simon_hain,

          Thank you for quick reply. Actually i want to implement lazy loading. for eg: in a row i need to display image and their details. i have somany rows is their, so first i need to display the data after that i need to display the image. so if i scroll in vertically the screen data will be display but how to get that details for download the image for that perticular datas. Is their any method to access these details in blackberry?

Thanks

[simon_hain]

how do you display your data?
i would suggest to use a listfield. you can fill it with your data objects, then download the pictures and refresh the listfield after it was downloaded.

[user17]

Hi Simon_hain,

            Thanks for your response, I need to add all the data but i don't want to download all the images at time. After scrolling which position i stoped in that image i need to display according to that perticular data. iam using labelfield only.

Thanks

[simon_hain]

you can use getSelectedIndex on a listfield.

if you are set on labelfields you should check them with an index and see if they are visible.
you could store the last visible field from your initial processing and check until you find the first invisible field after a scroll action.

[user17]

Hi simon_hain,

             Thanks for your response, but i need to load the image with out selecting any data.

Thanks

[simon_hain]

if a screen is scrolled it usually means the user has focused another field (or swiped down on a touch display).
you can check the (now) visible fields and start loading the associated pictures.

[user17]

Hi Simon_hain,

                         Thanks for your response, I will try what you explaind.