Android学习笔记__TextView关键字高亮与超链接

来源：互联网发布：路由器上mac是什么意思编辑：程序博客网时间：2024/06/05 02:44

目的：

将TextView里文本中的某些关键字高亮，并且设置超链接，可以进行页面的跳转

实现方法：

使用SpannableString，采用正则表达来搜索文本中的关键字；

设置关键字的超链接通过重写ClickableSpan来实现

// 加载文章内容高亮多个关键字，只高亮一个关键字去掉循环String[] keywords = new String[] { "power", "internet" };SpannableString s = new SpannableString(getResources().getString(R.string.papercontent));for (int i = 0; i < keywords.length; i++) {Pattern p = Pattern.compile(keywords[i] + "\\W");Matcher m = p.matcher(s);while (m.find()) {int start = m.start();int end = m.end() - 1;Intent intent = new Intent(getApplicationContext(),KeyWord.class);s.setSpan(new IntentSpan(intent), start, end,Spannable.SPAN_EXCLUSIVE_INCLUSIVE);}}tvContent.setText(s);tvContent.setMovementMethod(LinkMovementMethod.getInstance());

/** * 重写ClickableSpan中的onClick，实现点击效果 * @author zengjiyang */public class IntentSpan extends ClickableSpan implements ParcelableSpan {private Intent mIntent;public IntentSpan(Intent mIntent) {super();this.mIntent = mIntent;}@Overridepublic int describeContents() {// TODO Auto-generated method stubreturn 0;}@Overridepublic void writeToParcel(Parcel dest, int flags) {// TODO Auto-generated method stub}@Overridepublic int getSpanTypeId() {// TODO Auto-generated method stubreturn 100;}@Overridepublic void onClick(View widget) {// TODO Auto-generated method stubContext context = widget.getContext();context.startActivity(mIntent);}@Overridepublic void updateDrawState(TextPaint ds) {// TODO Auto-generated method stubsuper.updateDrawState(ds);ds.setColor(Color.RED);ds.setUnderlineText(false);ds.bgColor = Color.TRANSPARENT;}}

PS：目前就这些，日后再补充

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