Android Question Screen Size Problem

corwin42

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• Feb 28, 2017

• #2

The resolution is not enough to take care of. The devices scale is another factor. I guess both devices use a different scale.

How did you create your layouts for the Activities? With the designer? Then I guess it will be possible to create just another variant for the new devices.

For future development you should consider this tutorial: https://www.b4x.com/android/forum/t...creens-tips-and-best-practices.17647/#content

 

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David Elkington

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• Feb 28, 2017

• #3

I have two Lenovo tablets, one is reporting 10.10 as the screen size and one @ 9.43, but I think they should be both 10. They have different DPI, but the app looks identical to the Pixel so I am not sure it is a scale issue as I have used DIP everywhere.

 

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David Elkington

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• Feb 28, 2017

• #4

I created some views with the designer, and some using code. they both dont fit.

 

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klaus

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• Feb 28, 2017

• #5

With what layout variant did you define the layouts in the Designer?

 

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David Elkington

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• Feb 28, 2017

• #6

I created a custom 1920x1200 layout with scale factor 1.5 which I think should cater for 240 dpi, so I would have thought the 8" would display smaller than the screen not outside the screen.

 

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eps

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• Feb 28, 2017

• #7

The best way forward is to get the App to resize everything to fit the space available. Then you shouldn't ever have to recode that part.

Something like this :

B4X:

Activity.AddView(TabHost1,0,0,screen_width,screen_height)

Obviously it depends on what your main 'view' is and if you need the full height or not - I make mine slightly 'shorter' so that an advert can be popped in it, but guess that your App won't have this in - have tailored the above.

It might help to see some screenshots or at least an idea of what the App is displaying and how you are arranging the information.

ETA : I guess you've read this https://www.b4x.com/android/forum/threads/supporting-multiple-screens-tips-and-best-practices.17647/

 

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corwin42

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• Feb 28, 2017

• #8

David Elkington said:

I created a custom 1920x1200 layout with scale factor 1.5 which I think should cater for 240 dpi, so I would have thought the 8" would display smaller than the screen not outside the screen.

Click to expand...

No. Dip means "Device independent pixels" so if you use dip values 1 inch on the 10" tablet will also be 1 inch on the 8" tablet. Therefore on the 8" tablet your layout will not fit.

Try this on both devices. You will see that the scale will differ.

B4X:

    Dim lay As LayoutValues
    lay = GetDeviceLayoutValues
    Log(lay.ApproximateScreenSize)
    Log(lay.toString)

 

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klaus

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• Feb 28, 2017

• #9

I created a custom 1920x1200 layout with scale factor 1.5 ...

Click to expand...

I'm afraid that the problem is this: scale factor 1.5
Do you use AutoScaleAll ?
You should never use a layout variant with a scale factor different from 1.
The operating system will automatically adjust the layout according to the scale factor.
But as you have 1 device type with a scale factor of 1.5 and the other with a factor of 2, I suggest you the following.
For testing make a layout with 1920x1200 and scale factor 1 and see if it works.
As the target devices have almost the same dimensions, another solution would be to position the views in the Designer with %x and %y values.
As eps aleady suggested, could you post a layout file?

 

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David Elkington

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• Feb 28, 2017

• #10

Many thanks Corwin, I think that answers my problem, I will have to do some changes to use %

 

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David Elkington

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• Feb 28, 2017

• #11

Thanks Klaus, I am not at my computer at the moment, will look into it and post a layout if I am still having issues.

 

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David Elkington

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• Feb 28, 2017

• #12

I do have one question however, I did have 2 layout files in another screen, one was 1280X800 and the other 1920x1200. I made it look good on the 1280 size, and then did a few changes on the 1920x1200 layout, but the tablet never seems to use the 1920 layout at all? Is there a reason for this?

 

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corwin42

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• Feb 28, 2017

• #13

A small tip:

In the B4A program folder is a file called "AbstractLayouts.txt". There you can add a definition for the new tablet. Then you can check with the Abstract designer if your current layout will fit on the new device.

 

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klaus

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• Feb 28, 2017

• #14

A layout variant 1280X800 scale 1 works fine on a device with 1920x1200 scale 1.5.
My concern is that your new device has 1920x1200 scale 2.
And I'm not sure what happens with the 1280X800 scale 1 layout.

 

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corwin42

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• Feb 28, 2017

• #15

David Elkington said:

I do have one question however, I did have 2 layout files in another screen, one was 1280X800 and the other 1920x1200. I made it look good on the 1280 size, and then did a few changes on the 1920x1200 layout, but the tablet never seems to use the 1920 layout at all? Is there a reason for this?

Click to expand...

I guess you mean 2 variants, not files? I guess again that the first variant is 1280x800 scale 1 and the second is 1920x1200 scale 1.5.
So for B4A they are just the same dimensions. B4A will select the first variant for a 1920x1200x1.5 device because it perfectly fits this device.

 

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