problem with scaling pictures

[alwaysbusy]

I'm trying to convert an app I've written in java to basic4android. I have some problems with the scaling of the background picture. It has to run on a Samsung Galaxy S (480x800x1,5 (240 dpi))

Screenshot 1 is how it should be

Screenshot 2 is the result on the Samsung Galaxy S

Screenshot 3 My settings in Basic4android.

In the java app, I put my pictures in the drawable-hdpi folder and it is scaled correcty. In b4a I only see a drawable folder.

When I create an emulator with 480x480x1 (160 dpi) the picture is shown correctly (screenshot 1). If I create an emulator with 480x800x1,5 it is wrong (screenshot 2).

Any help would be greatly appreciated.

 

[agraham]

What is the actual size of the original image? What are we seeing, a BitMapDrawable set as the Activity Background?

 

[alwaysbusy]

Your question gave me the clue to the solution. The picture is 1440x1600. It is not drawn in b4a itself, but in java. I have a surfaceview connected to a b4a panel (very much like the camera library).

I did draw it like this:

mCanvas.drawBitmap(_bg, 0,0, null);

were I wrongly assumed it would take 480x800 pixels from the picture and put it on the canvas.

However now I do it like this:

Rect src=new Rect(0, 0, 480, 800);
Rect dst=new Rect(0, 0, 480, 800);
mCanvas.drawBitmap(_bg, src, dst, null);

And the size of the picture is correct.

 

[modus]

Galaxy S DPI

Hi alwaysbusy,
I have the same problem with my Galaxy S.
With emulator is right with 160 dpi but phone zoom 1.5x.
Have you found some solution?
Thank you

 

[Erel]

It is better to start new threads for new questions. Use 'dip' unit and everything will work fine:

Button1.Width = 100dip