Checklist

• I have searched the issue tracker for open issues that relate to the same problem, before opening a new one.
• This issue only relates to a single bug. I will open new issues for any other problems.

Describe the bug

The icon and labels of AppTabs on Android are rendered much larger then for it's native pendant the Navigation Bar. This is not ideal, because it means that in comparison much more vertical space is occupied by the bar and less space available for the actual content of a tab. It also makes a Fyne app look very different from the a native app. The total number of icons appears to be the same though (maximum of 5 for both).

This might be a bug where Fyne's renderer fails to determine the correct icon and label size from Android.

How to reproduce

• Package and deploy a Fyne app with AppTabs to Android
• Run a Fyne app with AppTabs in the mobile simulator ((e.g. go run -tags mobile .)

Screenshots

For example here is how the AppTabs are rendered on Android:

For comparison this is how the an app using the native Navigation Bar looks on Android:

Example code

package main

import (
	"fyne.io/fyne/v2/app"
	"fyne.io/fyne/v2/container"
	"fyne.io/fyne/v2/theme"
	"fyne.io/fyne/v2/widget"
)

func main() {
	a := app.New()
	w := a.NewWindow("Mobile UI")
	master := container.NewAppTabs(
		container.NewTabItemWithIcon("Home", theme.HomeIcon(), widget.NewLabel("Character")),
		container.NewTabItemWithIcon("Sheet", theme.AccountIcon(), widget.NewLabel("Sheet")),
		container.NewTabItemWithIcon("More", theme.MenuIcon(), widget.NewLabel("More")),
	)
	master.SetTabLocation(container.TabLocationBottom)
	w.SetContent(master)
	w.ShowAndRun()
}

Fyne version

v2.5.3

Go compiler version

1.23.4

Operating system and version

Waydroid 1.4.3 with Android Version 11

Additional Information

See also related discussion on Discord: https://discord.com/channels/953020122690359327/953030515152281650/1330254101774209034