android TextView中超链接的事件捕捉

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

            //循环把链接发过去
            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) {
            if(mUrl .equal(lianjie)){
                Toast.makeText(ctx, mUrl, Toast.LENGTH_LONG).show();
                widget.setBackgroundColor(Color.parseColor("#00000000"));

            }
        }
    }
}

补充：移动开发 , Android ,