java - 从 textView 中提取一部分文本并使该文本可点击？

Question

假设我有一个字符串

String str =" Hello, @John how's going on"

现在我想知道，如何突出显示单词 @John 并希望使其可从 Textview 中点击

Answer 1

您可以在 spannable 字符串中使用 clickable span，如下所示:-

SpannableString ss = new SpannableString(" Hello, @John how's going on");
ClickableSpan clickableSpan = new ClickableSpan() {
   @Override
   public void onClick(View textView) {
     //perform click operation
   }
   @Override
   public void updateDrawState(TextPaint ds) {

   }
};

ss.setSpan(clickableSpan, startIndex, endIndex, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

yourTv.setText(ss);
yourTv.setMovementMethod(LinkMovementMethod.getInstance());
yourTv.setHighlightColor(Color.TRANSPARENT);

startIndex - is the index of J of word John in the full string

endIndex - is the index of n of the word John in the full string.

&& 一旦 john 被点击，就会触发 onclick 方法..

编辑

要提取用户名 John，您可以拆分字符串并像下面的代码 fragment 一样获取它:-

 String username = yourString.split("@")[1].split(" ")[0]; // this will extract john