Android ClickableSpan 应用实例

package com.test; 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 Test2Activity extends Activity { /** Called when the activity is first created. */ 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")); } } }