CODEWITHSUNDEEP
androidfonts
Grzegorz Adam Hankiewicz
Grzegorz Adam Hankiewicz

Reputation: 7691

Why does my custom TextView not inherit the font?

For a specific feature I needed to implement a custom TextView which would use spannables to style text. Everything works, except the font used by the custom view seems to be the default font rather than the one I'm specifying. Reducing to the minimal code triggering the problem I created this class:

class DummyTextViewBad : TextView {
    constructor(context: Context?) : super(context)
    constructor(context: Context?, attrs: AttributeSet?) : super(context, attrs)
    constructor(context: Context?, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr)
}

In my xml, just changing the widget from TextView to DummyTextViewBad makes the font (avenir) go away and render using the system default. However, if I set the font manually like this, it works:

class DummyTextViewGood : TextView {
    constructor(context: Context?) : super(context) {
        setAvenir(context)
    }

    constructor(context: Context?, attrs: AttributeSet?) : super(context, attrs) {
        setAvenir(context)
    }

    constructor(context: Context?, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr) {
        setAvenir(context)
    }

    fun setAvenir(context: Context?) {
        try {
            typeface = ResourcesCompat.getFont(context!!, R.font.avenir_font)
        } catch (e: Exception) {
            println("Failed to set font");
        }
    }
}

Why do I need to set the font manually even when my subclass doesn't do anything else at all? Am I missing some needed super() calls to configure the font? If the font issue is known, what is the standard way to extract the font from the xml attributes and avoid hardcoding it in code?

Upvotes: 1

Views: 355

Answers (2)

Javier Rebollo
Javier Rebollo

Reputation: 101

You need extend of AppCompatTextView because by default in XML import AppCompatTextView but if make a new components you need import AppCompatTextView not TextView ;)

Upvotes: 6

GianhTran
GianhTran

Reputation: 3711

why we need create a custom view just for using font family, TextView already support this.

<TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:fontFamily="@font/avenir_font"/>

Upvotes: 0

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