Material-components-android: [Chip] Chips are blinking in ChipGroup with custom font

[DEcSENT]

Description: I'm trying to update all Chips in ChipGroup but they are blinking for a short time.

Expected behavior: Chips update without blinking.

Source code:
Chips are created programmatically:

    private fun createChip(context: Context, chipTitle: String): Chip {
        return Chip(context)
            .apply {
                setTextAppearance(R.style.ChipTextStyle)
                text = chipTitle
                isClickable = false
                isFocusable = false
                setChipBackgroundColorResource(R.color.chipColor)
                setTextColor(ContextCompat.getColor(context, R.color.black))
            }
    }

Style with custom font:

    <style name="ChipTextStyle">
        <item name="android:textSize">20sp</item>
        <item name="android:textColor">@color/black</item>
        <item name="android:fontFamily">@font/whitney_medium</item>
    </style>

Update method:

    private fun updateAllChips() {
        chipGroup.removeAllViews()
        val chipsTitles = listOf("Tag 1", "Tag 2", "Tag 3", "Tag 4")
        chipsTitles.forEach { title ->
            val chip = createChip(this, title)
            chipGroup.addView(chip)
        }
    }

Full source code: link to repository

Android API version: 28, 27, 23

Material Library version: 1.1.0

Devices: Meizu 16th api 28, emulators (Nexus 5X api 27, Galaxy Nexus api 23)

[ymarian]

I would say this is expected. You are creating Chips with one font and then replacing that. You have different options maybe inflate the chip with the right font in the first place or change your method to:

private fun createChip(context: Context, chipTitle: String): Chip { return Chip(context) .apply { visibility = GONE setTextAppearance(R.style.ChipTextStyle) text = chipTitle isClickable = false isFocusable = false setChipBackgroundColorResource(R.color.chipColor) setTextColor(ContextCompat.getColor(context, R.color.black)) post { visibility = VISIBLE } } }

[DEcSENT]

@ymarian I wouldn't say it is expected, because when I set custom font manually all works fine:

    private fun createChip(context: Context, chipTitle: String): Chip {
        val customFont = ResourcesCompat.getFont(context, R.font.whitney_medium)
        return Chip(context)
            .apply {
                typeface = customFont
                textSize = 20f
                text = chipTitle
                isClickable = false
                isFocusable = false
                setChipBackgroundColorResource(R.color.chipColor)
                setTextColor(ContextCompat.getColor(context, R.color.black))
            }
    }

[ymarian]

@DEcSENT

If getting the font synchronously is ok then you can also do TextAppearanceConfig.setShouldLoadFontSynchronously(true)

It should only matter for the first load I think

[rmyhal]

So the fix for this issue is to use TextAppearanceConfig.setShouldLoadFontSynchronously(true) ?

[vizsatiz]

I am facing the same issue when I have an action chip on ny recycler view item with custom fonts

[wcshi]

@rmyhal beware that this may cause ANRs if your custom font takes too long to load.

[rmyhal]

@wcshi yes, I know, thanks!
I set it true -> load my font -> set false