Android之TextView------LINK的点击事件

package com.TextHtml;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.text.Html;import android.text.Spannable;import android.text.SpannableStringBuilder;import android.text.method.LinkMovementMethod;import android.text.style.ClickableSpan;import android.text.style.URLSpan;import android.view.View;import android.widget.TextView;import android.widget.Toast;public   class  TextHtml extends Activity {     /* * Called when the activity is first created.  */      private  TextView  tv;     static  Context ctx = null ;    @Override     public   void  onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        ctx = this ;        tv  =  (TextView) findViewById(R.id.tv);         ? String htmlLinkText= " <a href=\\" +"http://www.baidu.com/><u>我的CSDN博客 </u></a>";?             tv.setText(Html.fromHtml(htmlLinkText));        tv.setMovementMethod(LinkMovementMethod.getInstance());           CharSequence text  =  tv.getText();            if (text instanceof Spannable){                int  end  =  text.length();               Spannable sp  =  (Spannable)tv.getText();               URLSpan[] urls = sp.getSpans( 0 , end, URLSpan. class );                SpannableStringBuilder style = new  SpannableStringBuilder(text);               style.clearSpans(); // should clear old spans                 for (URLSpan url : urls){                   MyURLSpan myURLSpan  =   new  MyURLSpan(url.getURL());                   style.setSpan(myURLSpan,sp.getSpanStart(url),sp.getSpanEnd(url),Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);               }               tv.setText(style);           }                               }         private   static   class  MyURLSpan extends ClickableSpan{                      private  String mUrl;           MyURLSpan(String url) {               mUrl  = url;           }           @Override         public   void  onClick(View widget) {             //  TODO Auto-generated method stub             Toast.makeText(ctx,  " hello! " ,Toast.LENGTH_LONG).show();        }       }} 

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