Android中使用SpannableStringBuilder实现单TextView多ClickSpan点击失效问题求助

存在的问题 #

• 错误配置LinkMovementMethod：你当前将LinkMovementMethod.getInstance()设置给了复选框控件cbTermsOfService，但实际承载可点击Spannable文本的是termAndCondtionLabel，ClickableSpan响应点击必须依赖目标TextView设置LinkMovementMethod。
• 重复赋值覆盖有效配置：你先构建了包含正确点击Span的spannableString并赋值给TextView，后面又用buildSpannedString构建了错误的富文本重新赋值，直接覆盖了前面的有效配置。
• buildSpannedString使用错误：在第一个inSpans代码块中，你只在闭包内创建了ClickableSpan实例，没有将其传入inSpans的参数列表，该Span不会被绑定到文本上。
• TextView拦截点击事件：布局中termAndCondtionLabel设置了android:clickable="true"，会优先消费点击事件，导致Span的点击无法触发。

修复步骤 #

1. 先修改布局，删除termAndCondtionLabel的android:clickable="true"属性
2. 调整业务代码，去掉给复选框设置movementMethod的逻辑，删除重复的buildSpannedString赋值代码，给承载文本的TextView配置正确的movementMethod

修复后代码 #

// 复选框点击逻辑保留即可
binding.bottomButtonLayout.cbTermsOfService.setOnClickListener {
    it.isChecked = !it.isChecked
    binding.bottomButtonLayout.btnGetstartedSmsm.isEnabled = it.isChecked
}

private fun updateTermsAndCondition(){
    val completeText = "I hereby accept that I have read and agree to the Terms and Conditions and Key Fact Statement"
    val termsTextToFind = "Terms and Conditions"
    val keyFactTextToFind = "Key Fact Statement"
    val spannableString = SpannableString(completeText)

    val startFocusTerms = completeText.indexOf(termsTextToFind)
    val endFocusTerms = startFocusTerms + termsTextToFind.length
    val startFocusKey = completeText.indexOf(keyFactTextToFind)
    val endFocusKey = startFocusKey + keyFactTextToFind.length

    // 设置Terms and Conditions点击、样式
    spannableString.setSpan(object: ClickableSpan() {
        override fun onClick(view: View) {
            showTermsAndConditions()
        }
        // 不需要下划线可加这段重写逻辑
        override fun updateDrawState(ds: TextPaint) {
            super.updateDrawState(ds)
            ds.isUnderlineText = false
        }
    }, startFocusTerms, endFocusTerms, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
    spannableString.setSpan(StyleSpan(Typeface.BOLD), startFocusTerms, endFocusTerms, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
    spannableString.setSpan(ForegroundColorSpan(ContextCompat.getColor(binding.termAndCondtionLabel.context,R.color.red_daily_limit)), startFocusTerms, endFocusTerms, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)

    // 设置Key Fact Statement点击、样式
    spannableString.setSpan(object: ClickableSpan() {
        override fun onClick(view: View) {
            showKeys()
        }
        // 不需要下划线可加这段重写逻辑
        override fun updateDrawState(ds: TextPaint) {
            super.updateDrawState(ds)
            ds.isUnderlineText = false
        }
    }, startFocusKey, endFocusKey, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
    spannableString.setSpan(StyleSpan(Typeface.BOLD), startFocusKey, endFocusKey, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
    spannableString.setSpan(ForegroundColorSpan(ContextCompat.getColor(binding.termAndCondtionLabel.context,R.color.red_daily_limit)), startFocusKey, endFocusKey, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)

    // 给承载文本的TextView设置LinkMovementMethod，必须加
    binding.termAndCondtionLabel.movementMethod = LinkMovementMethod.getInstance()
    // 赋值富文本
    binding.termAndCondtionLabel.text = spannableString
}

内容的提问来源于stack exchange，提问作者Atif AbbAsi