Kotlin extension for applying Spannable text on any textview and getting callback for onclick.

Extensions.kt

import android.text.SpannableStringBuilder
import android.text.Spanned
import android.text.TextPaint
import android.text.method.LinkMovementMethod
import android.text.style.ClickableSpan
import android.view.View
import androidx.appcompat.widget.AppCompatTextView

fun AppCompatTextView.highLightWord(word: String, onClick: () -> Unit) {
    val ssBuilder = SpannableStringBuilder(this.text)
    val clickAbleSpan = object : ClickableSpan() {
        override fun onClick(widget: View) {
            onClick.invoke()
        }

        override fun updateDrawState(ds: TextPaint) {
            ds.color = ds.linkColor // you can use custom color
            ds.isUnderlineText = false // this remove the underline
        }
    }

    ssBuilder.setSpan(
        clickAbleSpan,
        text.indexOf(word),
        text.indexOf(word) + word.length,
        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE
    )

    text = ssBuilder
    movementMethod = LinkMovementMethod.getInstance();
}

MainActivity.kt

import android.content.Intent
import android.net.Uri
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup

internal class TermsAndUseFragment : Fragment() {


    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        mView = inflater.inflate(R.layout.fragment_terms_and_use, container, false)
        mView.tncDetail.highLightWord(getString(R.string.terms_and_conditions)) {
            openTermsNConditionActivity()
        }
        return mView.rootView
    }
  
}