Android:将onClickListener设置为TextView中的部分文本 - 问题

Question

我正在尝试识别TextView中的主题标签,并使它们可单击,这样我可以在用户点击Hashtag时将用户带到另一个View.

我设法使用模式匹配在TextView中识别Hashtags,它们在运行时显示为彩色.但是,我需要使Hashtag可点击.

这是我的代码:

 SpannableString hashText = new SpannableString("I just watched #StarWars and it was incredible. It's a #MustWatch #StarWars");
 Matcher matcher = Pattern.compile("#([A-Za-z0-9_-]+)").matcher(hashText);

 while (matcher.find())
 {
          hashText.setSpan(new ForegroundColorSpan(Color.parseColor("#000763")), matcher.start(), matcher.end(), 0);
          String tag = matcher.group(0);
 }

 holder.caption.setText(hashText);

 //I need to set an OnClick listener to all the Hashtags recognised

使用上面的相同解决方案,如何将onclick侦听器添加到每个#标签？

Answer 1

有一种方式...在看到你的问题后,我只是谷歌搜索...我发现了这一点,我希望它会起作用......

1.你可以使用android.text.style.ClickableSpan 链接

SpannableString ss = new SpannableString("Hello World");
    ClickableSpan span1 = new ClickableSpan() {
        @Override
        public void onClick(View textView) {
            // do some thing
        }
    };

    ClickableSpan span2 = new ClickableSpan() {
        @Override
        public void onClick(View textView) {
            // do another thing
        }
    };

    ss.setSpan(span1, 0, 4, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
    ss.setSpan(span2, 6, 10, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

    textView.setText(ss);
    textView.setMovementMethod(LinkMovementMethod.getInstance());

另一种方式.. 链接

 TextView myTextView = new TextView(this);
    String myString = "Some text [clickable]";
    int i1 = myString.indexOf("[");
    int i2 = myString.indexOf("]");
    myTextView.setMovementMethod(LinkMovementMethod.getInstance());
    myTextView.setText(myString, BufferType.SPANNABLE);
    Spannable mySpannable = (Spannable)myTextView.getText();
    ClickableSpan myClickableSpan = new ClickableSpan()
    {
     @Override
     public void onClick(View widget) { /* do something */ }
    };
    mySpannable.setSpan(myClickableSpan, i1, i2 + 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

回答刚刚从那些链接复制...

Answer 2

是的,你可以做到这一点,你需要使用ClickableSpan用SpannableString

将此代码粘贴到while循环中

final String tag = matcher.group(0);
ClickableSpan clickableSpan = new ClickableSpan() {
                @Override
                public void onClick(View textView) {
                    Log.e("click","click " + tag);
                }
                @Override
                public void updateDrawState(TextPaint ds) {
                    super.updateDrawState(ds);

                }
            };
            hashText.setSpan(clickableSpan, matcher.start(), matcher.end(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

别忘了装setMovementMethod()上你的TextView

holder.caption.setMovementMethod(LinkMovementMethod.getInstance());

Answer 3

您可以使用此代码通过文本视图中可单击的任何键（@，#）文本来更改颜色。我使用此甲酸盐。它在我这边工作得很好。

private void setTags(TextView pTextView, String pTagString) {
    SpannableString string = new SpannableString(pTagString);

    int start = -1;

    for (int i = 0; i < pTagString.length(); i++) {
        if (pTagString.charAt(i) == '@' || pTagString.charAt(i) == '#') {               
            start = i;

        } else if (pTagString.charAt(i) == ' '
                || (i == pTagString.length() - 1 && start != -1)) {
            if (start != -1) {
                if (i == pTagString.length() - 1) {
                    i++; // case for if hash is last word and there is no
                            // space after word
                }

                final String tag = pTagString.substring(start, i);              
                string.setSpan(new ClickableSpan() {

                    @Override
                    public void onClick(View widget) {

                        Toast.makeText(mContext, "" + tag, 3000)
                                .show();
                    }
                    @Override
                    public void updateDrawState(TextPaint ds) {

                        if (tag.contains("@"))
                            ds.setColor(Color.parseColor("#0474be"));
                        else
                            ds.setColor(Color.parseColor("#ed6057"));

                        ds.setUnderlineText(false);
                    }
                }, start, i, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                start = -1;
            }
        }
    }

    pTextView.setMovementMethod(LinkMovementMethod.getInstance());
    pTextView.setText(string);
}

请尝试这种方式希望可以解决您的问题。