Android Question Calculate imageview height.

[Sub7]

Well it seems stupid but i miss something.
Let say i have an imageview and i want to put a logo inside
i set this imageview in the script editor in this way:

imgview.top = 0%y
imgview.SetLeftAndRight(5%x,95%x)

I know that i want the logo to cover almost all screen 5/95 but i dont know how to set the height correctly, for example in photoshop you can resize by keeping proportions, but here?

Dim imgwidth as int
imgwidth = imgview.width

Image gravity FILL

how i can calculate the height so the image does not get streched knowing only the width?

Thanks

ps i tried something like this but is not ok

   Dim logobmp As Bitmap
   logobmp.Initialize(File.DirAssets, "logo.png")
   Dim logoHeight As Int
   logoHeight = logobmp.Height /logobmp.Width *logobmp .Width
   imageview.Height = logoHeight
   img_imageview.Bitmap = logobmp

 

[LucaMs]

Maybe this can help you (thanks to Klaus):

https://www.b4x.com/android/forum/threads/imageview-bitmap-centered.43779/

 

[Sub7]

Ciao Luca,
while this works and i've tried that before, this logo is a png file with transparency.
the output of that function is correct image but with a white background which is not ok.

 

[LucaMs]

attached:
ImageView.Color = Colors.Blue
png with transparency

 

[Sub7]

So was only that: imageview.Color = Colors.Transparent
Grazie luca, nice xmass example.

 

[LucaMs]