I am having a small issue with capturing screen in android.
I am using a list view which has few items. When the items are fitting the screen there is no issue to capture the screen. But when there is a scroll view for the list items (that is there are more number of items in the listview so that it cant be fitted in the screen) i am not able to capture the screen.
The capture of the screen gives me only the visible items of the list view and the invisible items are not being captured.
I am using the link to capture the screen.
can anyone suggest me if there is anyway to capture the listview screen.
My screen has all alphabets from a-z but when i tried to capture using here i got only the below screen shot.
This is related to this question/answer here.
Basically you need to render your view to a canvas that is backed by a bitmap. This bitmap now contains your entire view.
We need to capture the listview by capturing each and every listitem in the listview.
after capturing each and every item in the listview we need to add all the captured list items and make a bitmap image.
This way we can capture an listview even if all its items are not visible
Related
I am developing profile screen using Compose UI, it has sticky scaling avatar as header base on scrolling position of the below list, the avatar will be scaled up/down when the first item of the list is visible, and when the avatar at the smallest size, the list can scroll as a normal list, as below
I am on MotionLayout approach. But can anyone give me another hint ?
I have a custom ListView that scrolls down quite a bit. I want a background image that tiles and scrolls with the ListView.
I used the code from this answer but background images are jumpy in that at certain scrolling points the entire thing resets to what is currently the top of the viewable screen. I assume this is because of ListView optimization. How do I get around this if each item in the list has the same height? I don't need the image to load for nonexisting items, I just need the illusion of continuity.
Otherwise, tiling works just fine.
I have working sample of image gallery.
Now if I have 10 images in gallery, few of them gets displayed initially, lets say 3 (based on image thumbnail dimensions), and rest of the images can be viewed by scrolling the gallery.
I want to change this a bit.
Based on image thumbnail dimensions, few images should be displayed initially and instead of scrolling, there should be previous and next buttons, on click of which images will shift left or right.
Any help appreciated.
You can use gallery and onButtonPress call onFling (for smooth scrolling, or simple select next image) event to change selected item.
Or you can use LinearLayout, calculate image dimensions runtime, create child imageViews for parent linearLayout and onclick fill this views with your images
I have a list adapter which shows a large photo in each row. I'm fetching the bitmap off the disk in a thread in the ListAdapter.getView() method. This works fine, but it's slightly annoying that when the user is scrolling, they'll see the top of a new row coming on screen with the empty ImageView. The thread to read the bitmap off disk completes pretty quickly and then the redraw happens.
Is there a good pattern in the ListAdapter world to signal that the "next" row is in danger of coming onto screen momentarily? Ideally I'd like to start a thread to load the bitmap for this invisible row and get the bitmap into my memcache, that way if the user does scroll to this cell, the bitmap will already be loaded.
I suppose I'd need to know that (1) the user is scrolling downwards and (2) the top edge of the next invisible row is approximately 20 pixels or some value away from being visible.
Thanks
Register an AbsListView.OnScrollListener; you will be notified for the scrolling state of the list and you will also be given the current visible items. Combine these two parameters and it should be simple for you to decide whether you need to load "next" bitmaps or not.
I have Gallery element with full screen image. And user can scroll such images.
Is it possible to add some listener to Gallery and receive actions when image is totally on screen and no more scrolling.
I show "Loading..." icon and then load the image. And it doesn't work good when image is changed during the scroll from "Loadin..." to right image. That's why I want to show real image only after scrolling is ended.
Thanks