Android-TextView关键字高亮与超链接

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

 

 1         // 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

 2         String[] keywords = new String[] { "power", "internet" };

 3         SpannableString s = new SpannableString(getResources().getString(

 4                 R.string.papercontent));

 5         for (int i = 0; i < keywords.length; i++) {

 6             Pattern p = Pattern.compile(keywords[i] + "\\W");

 7             Matcher m = p.matcher(s);

 8             while (m.find()) {

 9                 int start = m.start();

10                 int end = m.end() - 1;

11                 Intent intent = new Intent(getApplicationContext(),

12                         KeyWord.class);

13                 s.setSpan(new IntentSpan(intent), start, end,

14                         Spannable.SPAN_EXCLUSIVE_INCLUSIVE);

15             }

16         }

17         tvContent.setText(s);

18         tvContent.setMovementMethod(LinkMovementMethod.getInstance());

 1     /**

 2      * 重写ClickableSpan中的onClick，实现点击效果

 3      * @author zengjiyang

 4      */

 5     public class IntentSpan extends ClickableSpan implements ParcelableSpan {

 6         private Intent mIntent;

 7 

 8         public IntentSpan(Intent mIntent) {

 9             super();

10             this.mIntent = mIntent;

11         }

12 

13         @Override

14         public int describeContents() {

15             // TODO Auto-generated method stub

16             return 0;

17         }

18 

19         @Override

20         public void writeToParcel(Parcel dest, int flags) {

21             // TODO Auto-generated method stub

22         }

23 

24         @Override

25         public int getSpanTypeId() {

26             // TODO Auto-generated method stub

27             return 100;

28         }

29 

30         @Override

31         public void onClick(View widget) {

32             // TODO Auto-generated method stub

33             Context context = widget.getContext();

34             context.startActivity(mIntent);

35         }

36 

37         @Override

38         public void updateDrawState(TextPaint ds) {

39             // TODO Auto-generated method stub

40             super.updateDrawState(ds);

41             ds.setColor(Color.RED);

42             ds.setUnderlineText(false);

43             ds.bgColor = Color.TRANSPARENT;

44         }

45 

46     }

PS：目前就这些，日后想到再补充