LayoutElementBuilders.Text 的 autoSizeTextType 属性

Question

In Android wear TileService we have to use LayoutElementBuilders.Text for displaying Text. In xml we can use autoSizeTextType for TextView.

How can i apply this property in LayoutElementBuilders.Text for wear TileService ?

I didn't find any method in the Builder.

Answer 1

Here i am sharing my solution to solve my problem.

Requirement was not to change font size when user change display font size from setting.

For fixed size i have to use font size in dp in dimen file like 20dp .

In DimensionBuilders.SpProp.Builder class method setValue expect value in sp .

In LayoutElementBuilders.FontStyle.Builder class method setSize expect SpProp .

So i have to calculate a scale factor and multiply with dp value.

    fun getScaleFactorForDp(context: Context) : Float {
        return (1.0f/context.resources.configuration.fontScale)
    }


    fun getSpProp(context: Context, @DimenRes dimensionId: Int, scaleFactor : Float = 1f): DimensionBuilders.SpProp {
        val spValue = (context.resources.getDimension(dimensionId) / context.resources.displayMetrics.density) * scaleFactor
        return DimensionBuilders.SpProp.Builder()
            .setValue(spValue)
            .build()
    }

   -------------------------------------------------     
    
    val scaleFactor = getScaleFactorForDp(context)
    LayoutElementBuilders.FontStyle.Builder()
        .setSize(getSpProp(context, R.dimen.text_size,scaleFactor))
        ....
        build()