android 自定义TextView中Html超链接点击事件详解

public class TextHtmlActivity extends Activity {    private TextView text;    private Activity mActivty;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.text_html_layout);        mActivty = this;        text  = (TextView) findViewById(R.id.text);        text.setText(Html.fromHtml("text3:  " +                "Text with a " + "link " +                "点击这个连接---"+                "连接 "+                "created in the Java source code using HTML."));        text.setMovementMethod(LinkMovementMethod.getInstance());        CharSequence str = text.getText();        if(str instanceof Spannable){            int end = str.length();            Spannable sp = (Spannable)text.getText();  //构建Spannable对象、继承Spanned、Spanned对象继承CharSequener            URLSpan[] urls=sp.getSpans(0, end, URLSpan.class);  //找出text中的a标签            //SpannableStringBuilder、SpannableString对象跟String对象差不多、只是比String对象多setSpan，            //可以给字符串设置样式、大小、背景色...而 SpannableStringBuilder跟SpannableString的关系就跟String跟StringBuffer关系一样            SpannableStringBuilder style=new SpannableStringBuilder(str);            style.clearSpans();//should clear old spans            for(URLSpan url : urls){                MyClickSpan myURLSpan = new MyClickSpan();                //设置样式其中参数what是具体样式的实现对象，start则是该样式开始的位置，end对应的是样式结束的位置，                // 参数 flags，定义在Spannable中的常量                style.setSpan(myURLSpan,sp.getSpanStart(url),sp.getSpanEnd(url),Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);            }            text.setText(style);        }    }    private class MyClickSpan extends ClickableSpan{        @Override        public void updateDrawState(TextPaint ds) {            ds.setUnderlineText(false);            super.updateDrawState(ds);        }        @Override        public void onClick(View widget) {            Toast.makeText(mActivty,"click link",Toast.LENGTH_SHORT).show();        }    }}
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