screen sizes question

M

marathon332

Member

Licensed User

Longtime User

• Dec 16, 2010

• #2

What a coincidence...

I just not 2 minutes ago, put this on the wishlist...


http://www.b4x.com/forum/bugs-wishlist/6930-autoscale-function.html#post39975

If enough people want it, maybe we can get Erel to add it..

--Steve

 

Upvote 0

Erel

B4X founder

Staff member

Licensed User

Longtime User

• Dec 16, 2010

• #3

As I wrote in the post mentioned above Basic4android does scale layouts automatically.
However developers are sometimes confused with the meaning of auto scale. Auto scale means that the layout is scaled based on the screen DPI - dots per inch. The ratio between the height and the width always stays the same. So if one device is longer than the other there will be an empty space at the bottom.

The same layout can be used for a device with HVGA device with 320*480 (160DPI = 1.0) and WVGA device with 480*800 (240DPI = 1.5). Though you will have some empty space at the bottom.

 

Last edited: Dec 16, 2010

Upvote 0

agraham

Expert

Licensed User

Longtime User

• Dec 16, 2010

• #4

A typo there I think Erel.

Erel said:

The same layout can be used for a device with HVGA device with 320*480 (160DPI = 1.0) and WVGA device with 480*800 (240DPI = 1.5).

Click to expand...

But it won't scale on a device like my tablet with 480*800(160DPI = 1.0) so you need a separate layout to cope with this.

 

Upvote 0

C

Cor

Active Member

Licensed User

Longtime User

• Dec 16, 2010

• #5

also does not work on a scaled down 240x400

grCor

 

Upvote 0

Erel

B4X founder

Staff member

Licensed User

Longtime User

• Dec 16, 2010

• #6

It shouldn't be difficult to create layout variants for many types of screens.
- Create emulators with the required screen resolutions.
- Design the first layout with the regular settings.
- Add layout variants for each target resolution. Connect to the matching emulator and move the views as required.

- If you later add a new view you will need to set its position in all variants. Therefore it is recommended to first create the "main" layout and only then add the variants.

 

Upvote 0

C

Cor

Active Member

Licensed User

Longtime User

• Dec 16, 2010

• #7

thanks Erel,

that was clear

put it in documentation

grCor

 

Upvote 0

Erel

B4X founder

Staff member

Licensed User

Longtime User

• Dec 16, 2010

• #8

I will create a short tutorial about it.

 

Upvote 0

C

colin9876

Active Member

Licensed User

• Dec 16, 2010

• #9

Whats the command to get the screen height and screen width of the device that the codes running on?
does canvas1.height return the value? (just a guess?)

 

Upvote 0

C

Cor

Active Member

Licensed User

Longtime User

• Dec 16, 2010

• #10

B4X:

Dim layoutVal As LayoutValues

 layoutVal=GetDeviceLayoutValues
 If layoutVal.width < 320 Then
    splashPanel.SetBackgroundImage(LoadBitmap(File.DirAssets,"notsupported.png"))
   Activity.AddView(splashPanel, 0, 0, 100%x, 100%y)
   Return True
 End If

grCor

 

Upvote 0

Erel

B4X founder

Staff member

Licensed User

Longtime User

• Dec 16, 2010

• #11

GetDeviceLayoutValues: Basic4android - Core

 

Upvote 0