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How to set row height of a list view cell based on the screen width

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I have an app where i'm trying to display images in a list view. It's one image per row but i want the image to goacross the whole width of the screen so I need it to get larger / smaller depending on the screen width. that's fine - i have that working but I therefore also need the height of the cell to adjust so that the aspect ratio of the image stays the same. That's also fine within the cell however i need the listView RowHeight to adjust based on that. Is there a simple way of telling the RowHeight to just expand based on the height of the cell or do i need to get the screen width and calculate it? the aspect ratio will always be the same so each image will be the same height.


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