android font size of tabs

Question

i ask this quest for a few time ago , but i get no solutions :( my problem is, that i have an android app with a tab activity, where i have to set the font size of my tabs,

Answer 1

I've done the following:

Create a attrs.xml entry like this

<resources>
  <declare-styleable name="SegmentedTabLayout">
    <attr name="fontSize" format="dimension" />
  </declare-styleable>
</resources>

Then create a font size property and initialise method that you'll call in the constructor like this

public float FontSize { get; set; }

private void InitializeAttrs(Context context, IAttributeSet attrs)
{
    if (context == null || attrs == null)
            return;

    var styleAttributes = context.ObtainStyledAttributes(attrs, Resource.Styleable.SegmentedTabLayout);

    if (styleAttributes == null)
        return;

    FontSize = styleAttributes.GetDimension(Resource.Styleable.SegmentedTabLayout_fontSize, -1);

    styleAttributes.Recycle();
}

Then I used the method of viral 9966 (improved it a little) and called it in the override NewTab method like this

public override Tab NewTab()
{
    var tab = base.NewTab();

    ChangeFontSize(tab);

    return tab;
}

private void ChangeFontSize(Tab tab)
{
    if (FontSize < 0)
        return;

    var tabViewGroup = (ViewGroup)tab.View;
    for (int i = 0; i < tabViewGroup.ChildCount; i++)
    {
        if (tabViewGroup.GetChildAt(i) is TextView textView)
        {
            textView.TextSize = FontSize;
        }
    }
}

And that's it :)