android TextView中超链接的事件捕捉（textview上LINK的点击事件）

package com.cm;
import java.util.ArrayList;
import android.R.color;

import android.app.Activity;

import android.content.Context;

import android.graphics.Color;

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 {

private TextView tv;

private static Context ctx;
@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
tv = new TextView(this);

ctx = this;
String htmlLinkText = "";
htmlLinkText = "aaaaaaaaaa"

+ "<a style=\"color:red;\" href=\"我是超链接……\">超链接点击事件</a>"

+ "aaaaaaaaaaaaaaaa";

// 文字的样式（style）被覆盖，不能改变……
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_INCLUSIVE);

}

tv.setText(style);

}

setContentView(tv);
}
private static class MyURLSpan extends ClickableSpan {
private String mUrl;
MyURLSpan(String url) {

mUrl = url;

}
@Override

public void onClick(View widget) {

Toast.makeText(ctx, mUrl, Toast.LENGTH_LONG).show();

widget.setBackgroundColor(Color.parseColor("#00000000"));

}

}

}