RichTextView.java

package com.shejiaomao.widget;

import java.util.regex.Pattern;

import com.cattong.commons.ServiceProvider;
import com.cattong.weibo.FeaturePatternUtils;

import android.content.Context;
import android.net.Uri;
import android.text.Spannable;
import android.text.TextPaint;
import android.text.method.LinkMovementMethod;
import android.text.style.URLSpan;
import android.text.util.Linkify;
import android.util.AttributeSet;
import android.widget.TextView;

public class RichTextView extends TextView {

	public static final Uri URI_PERSONAL_INFO  = Uri.parse("shejiaomao://info/");         // 用户资料查看地址
	public static final Uri URI_TOPIC          = Uri.parse("shejiaomao://topic/");        // 话题查看地址
	
	private int off; //字符串的偏移值
	private String[] highlightArray;
	//平台
	private ServiceProvider provider = ServiceProvider.Sina;

	public RichTextView(Context context, AttributeSet attrs) {
		super(context, attrs);
		
		this.getPaint().setUnderlineText(false);
	}

	public RichTextView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		
		this.getPaint().setUnderlineText(false);
	}

	@Override
	public boolean getDefaultEditable() {
	    return false;
	}

	@Override
	public void setText(CharSequence text, BufferType type) {
	    Spannable s;
        if (text instanceof Spannable) {
            s = (Spannable) text;
        } else {
        	if (text == null) {
        		text = "";
        	}
            s = Spannable.Factory.getInstance().newSpannable(text);
        }

        //email
        Linkify.addLinks(s, Linkify.EMAIL_ADDRESSES);

        //metion
        Pattern mentionPattern = FeaturePatternUtils.getMentionPattern(provider);
        if (mentionPattern != null) {
        	Linkify.addLinks(s, mentionPattern, URI_PERSONAL_INFO.toString());
        }

        //topic
        Pattern topicPattern = FeaturePatternUtils.getTopicPattern(provider);
        if (topicPattern != null) {
            Linkify.addLinks(s, topicPattern, URI_TOPIC.toString());
        }

        //url
        Pattern urlPattern = FeaturePatternUtils.getUrlPattern(provider);
        if (urlPattern != null) {
        	Linkify.addLinks(s, urlPattern, "http://");
        	
        }

        stripUnderlines(s);
        text = s;

        super.setText(text, type);

        if (this.getLinksClickable()) {
        	setMovementMethod(LinkMovementMethod.getInstance());
        }
    }

	private void stripUnderlines(Spannable s) {
        URLSpan[] spans = s.getSpans(0, s.length(), URLSpan.class);
        for (URLSpan span: spans) {
            int start = s.getSpanStart(span);
            int end = s.getSpanEnd(span);
            s.removeSpan(span);
            span = new URLSpanNoUnderline(span.getURL());
            s.setSpan(span, start, end, 0);
        }
    } 
	
	private class URLSpanNoUnderline extends URLSpan {
        public URLSpanNoUnderline(String url) {
            super(url);
        }
        
        @Override public void updateDrawState(TextPaint tp) {
            super.updateDrawState(tp);
            tp.setUnderlineText(false);
        }
    }
	
	public ServiceProvider getProvider() {
		return provider;
	}

	public void setProvider(ServiceProvider provider) {
		this.provider = provider;
	}

	private final static String TAG = "RichTextView";
}