实现 Android 文本链接的 4 种方法

1. 使用 TextView android:autoLink 属性，能自动识别文本中的 URLs 和 电话号码；

2. 使用 <a> 标签标记字符串中的链接，比如

    <a href="http://www.google.com">link</a>
    <a href="tel:4155551212">dial a phone number</a>
   

3. 使用 SpannableString 和 URLSpan 标记字符串；以上三种方法适用于固定（fixed）字符串，如果是动态字符串资源，比如来自网络；

4. 从 HTML 中导入字符串：setText(Html.fromHtml(String html)).

     // text4 shows creating text with links from HTML in the Java
     // code, rather than from a string resource.  Note that for a
     // fixed string, using a (localizable) resource as shown above
     // is usually a better way to go; this example is intended to
     // illustrate how you might display text that came from a
     // dynamic source (eg, the network).
   
     TextView t4 = (TextView) findViewById(R.id.text4);
     t4.setText(
         Html.fromHtml(
             "<b>text4: Constructed from HTML programmatically.</b>  Text with a " +
             "<a href=\"http://www.google.com\">link</a> " +
             "created in the Java source code using HTML."));
     t4.setMovementMethod(LinkMovementMethod.getInstance());
   

代码来源 Android API Demos: AndroidLink.java