LinkUtils.java

package com.blogspot.ksoichiro.linktest;

import android.text.Layout;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.TextUtils;
import android.text.method.LinkMovementMethod;
import android.text.style.ClickableSpan;
import android.text.style.URLSpan;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TextView;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public final class LinkUtils {
    public static final Pattern URL_PATTERN =
            Pattern.compile(
            "((?:(http|https|Http|Https):\\/\\/(?:(?:[a-zA-Z0-9\\$\\-\\_\\.\\+\\!\\*\\'\\(\\)"
            + "\\,\\;\\?\\&\\=]|(?:\\%[a-fA-F0-9]{2})){1,64}(?:\\:(?:[a-zA-Z0-9\\$\\-\\_"
            + "\\.\\+\\!\\*\\'\\(\\)\\,\\;\\?\\&\\=]|(?:\\%[a-fA-F0-9]{2})){1,25})?\\@)?)?"
            + "((?:(?:[a-zA-Z0-9][a-zA-Z0-9\\-]{0,64}\\.)+"   // named host
            + "(?:"   // plus top level domain
            + "(?:aero|arpa|asia|a[cdefgilmnoqrstuwxz])"
            + "|(?:biz|b[abdefghijmnorstvwyz])"
            + "|(?:cat|com|coop|c[acdfghiklmnoruvxyz])"
            + "|d[ejkmoz]"
            + "|(?:edu|e[cegrstu])"
            + "|f[ijkmor]"
            + "|(?:gov|g[abdefghilmnpqrstuwy])"
            + "|h[kmnrtu]"
            + "|(?:info|int|i[delmnoqrst])"
            + "|(?:jobs|j[emop])"
            + "|k[eghimnrwyz]"
            + "|l[abcikrstuvy]"
            + "|(?:mil|mobi|museum|m[acdghklmnopqrstuvwxyz])"
            + "|(?:name|net|n[acefgilopruz])"
            + "|(?:org|om)"
            + "|(?:pro|p[aefghklmnrstwy])"
            + "|qa"
            + "|r[eouw]"
            + "|s[abcdeghijklmnortuvyz]"
            + "|(?:tel|travel|t[cdfghjklmnoprtvwz])"
            + "|u[agkmsyz]"
            + "|v[aceginu]"
            + "|w[fs]"
            + "|y[etu]"
            + "|z[amw]))"
            + "|(?:(?:25[0-5]|2[0-4]" // or ip address
            + "[0-9]|[0-1][0-9]{2}|[1-9][0-9]|[1-9])\\.(?:25[0-5]|2[0-4][0-9]"
            + "|[0-1][0-9]{2}|[1-9][0-9]|[1-9]|0)\\.(?:25[0-5]|2[0-4][0-9]|[0-1]"
            + "[0-9]{2}|[1-9][0-9]|[1-9]|0)\\.(?:25[0-5]|2[0-4][0-9]|[0-1][0-9]{2}"
            + "|[1-9][0-9]|[0-9])))"
            + "(?:\\:\\d{1,5})?)" // plus option port number
            + "(\\/(?:(?:[a-zA-Z0-9\\;\\/\\?\\:\\@\\&\\=\\#\\~"  // plus option query params
            + "\\-\\.\\+\\!\\*\\'\\(\\)\\,\\_])|(?:\\%[a-fA-F0-9]{2}))*)?"
            + "(?:\\b|$)");

    public interface OnClickListener {
        void onLinkClicked(final String link);

        void onClicked();
    }

    static class SensibleUrlSpan extends URLSpan {
        /** Pattern to match. */
        private Pattern mPattern;

        public SensibleUrlSpan(String url, Pattern pattern) {
            super(url);
            mPattern = pattern;
        }

        public boolean onClickSpan(View widget) {
            boolean matched = mPattern.matcher(getURL()).matches();
            if (matched) {
                super.onClick(widget);
            }
            return matched;
        }
    }

    static class SensibleLinkMovementMethod extends LinkMovementMethod {

        private boolean mLinkClicked;

        private String mClickedLink;

        @Override
        public boolean onTouchEvent(TextView widget, Spannable buffer, MotionEvent event) {
            int action = event.getAction();

            if (action == MotionEvent.ACTION_UP) {
                mLinkClicked = false;
                mClickedLink = null;
                int x = (int) event.getX();
                int y = (int) event.getY();

                x -= widget.getTotalPaddingLeft();
                y -= widget.getTotalPaddingTop();

                x += widget.getScrollX();
                y += widget.getScrollY();

                Layout layout = widget.getLayout();
                int line = layout.getLineForVertical(y);
                int off = layout.getOffsetForHorizontal(line, x);

                ClickableSpan[] link = buffer.getSpans(off, off, ClickableSpan.class);

                if (link.length != 0) {
                    SensibleUrlSpan span = (SensibleUrlSpan) link[0];
                    mLinkClicked = span.onClickSpan(widget);
                    mClickedLink = span.getURL();
                    return mLinkClicked;
                }
            }
            super.onTouchEvent(widget, buffer, event);

            return false;
        }

        public boolean isLinkClicked() {
            return mLinkClicked;
        }

        public String getClickedLink() {
            return mClickedLink;
        }

    }

    public static void autoLink(final TextView view, final OnClickListener listener) {
        autoLink(view, listener, null);
    }

    public static void autoLink(final TextView view, final OnClickListener listener,
            final String patternStr) {
        String text = view.getText().toString();
        if (TextUtils.isEmpty(text)) {
            return;
        }
        Spannable spannable = new SpannableString(text);

        Pattern pattern;
        if (TextUtils.isEmpty(patternStr)) {
            pattern = URL_PATTERN;
        } else {
            pattern = Pattern.compile(patternStr);
        }
        Matcher matcher = pattern.matcher(text);
        while (matcher.find()) {
            SensibleUrlSpan urlSpan = new SensibleUrlSpan(matcher.group(1), pattern);
            spannable.setSpan(urlSpan, matcher.start(1), matcher.end(1),
                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        }
        view.setText(spannable, TextView.BufferType.SPANNABLE);

        final SensibleLinkMovementMethod method = new SensibleLinkMovementMethod();
        view.setMovementMethod(method);
        if (listener != null) {
            view.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (method.isLinkClicked()) {
                        listener.onLinkClicked(method.getClickedLink());
                    } else {
                        listener.onClicked();
                    }
                }
            });
        }
    }

}

MainActivity.java

package com.blogspot.ksoichiro.linktest;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        String testStr = "URLの形式のみブラウザで開きます。http://www.yahoo.co.jp/とhttp://d.hatena.ne.jp/をリンク表示にしてクリック可能にしました。";

        TextView textView = new TextView(this);
        textView.setTextSize(20);
        textView.setText(testStr);
        LinkUtils.autoLink(textView, new LinkUtils.OnClickListener() {
            @Override
            public void onLinkClicked(final String link) {
                Log.i("SensibleUrlSpan", "リンククリック:" + link);
            }

            @Override
            public void onClicked() {
                Log.i("SensibleUrlSpan", "ビュークリック");
            }
        });

        setContentView(textView);
    }
}

11-05 09:43:58.044: E/MessageQueue-JNI(1535): java.lang.ClassCastException: android.text.style.URLSpan cannot be cast to com.zzxy.bbczjh.util.LinkUtils$SensibleUrlSpan
11-05 09:43:58.044: E/MessageQueue-JNI(1535): at com.zzxy.bbczjh.util.LinkUtils$SensibleLinkMovementMethod.onTouchEvent(LinkUtils.java:75)

java.lang.ClassCastException: android.text.style.URLSpan cannot be cast to com.twnel.android.util.LinkUtils$SensibleUrlSpan
at com.twnel.android.util.LinkUtils$SensibleLinkMovementMethod.onTouchEvent(LinkUtils.java:78)