medium_atvasis_imagespan.kt

class MediumActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_medium)

        tv3.text = "FOR <picto> DEVS"
        val drawable = ContextCompat.getDrawable(this, R.drawable.medium_logo_lowres)!!.apply {
            setBounds(0, 0, intrinsicWidth, intrinsicHeight)
        }
        tv3.replaceTagWithDrawable("<picto>", { drawable })
    }

    private fun TextView.replaceTagWithDrawable(tag: String, drawableFactory: () -> Drawable, ignoreCase: Boolean = true) {
        val tagPos = text.indexOf(tag, ignoreCase = ignoreCase)
        if (tagPos >= 0) {
            var spannableString = text as? SpannableString?
            if (spannableString == null) {
                spannableString = SpannableString(text)
            }
            spannableString.setSpan(
                ImageSpan(drawableFactory(), ImageSpan.ALIGN_BASELINE),
                tagPos,
                tagPos + tag.length,
                Spannable.SPAN_EXCLUSIVE_EXCLUSIVE
            )
            text = spannableString
        }
    }
}