如何将 Drawable (ripple-drawable) 设置为 span 的背景？

Question

How can I set the background of a part of a textView to a drawable with a ripple effect?

spannableString.setSpan(
            BackgroundColorSpan(ANYCOLOR), startFocus, endFocus,
            Spannable.SPAN_EXCLUSIVE_EXCLUSIVE
        )

This code can just set the background to a color, but not to a XML-File. How to do that? Thanks in advance!

Answer 1

You can use clickable span for that:

fun getClickableSpan(action: (() -> Unit)): ClickableSpan {
        return object : ClickableSpan() {
            override fun onClick(widget: View) {
                action()
            }

            override fun updateDrawState(ds: TextPaint) {
                super.updateDrawState(ds)
                ds.isUnderlineText = false
            }
        }
    }

  text_view.apply {
            val spannable = getSpannableString(
               getClickableSpan {
                   action()
                },
                fullString,
                clikcableString
            )
            movementMethod = LinkMovementMethod.getInstance()
            text = spannable
        }

This code will provide you clickable part of text in TextView with ripple effect.