android TextView respectively identifying the plurality of click to jump url

实现方案：
private String pattern =
        "((http|ftp|https)://)(([a-zA-Z0-9\\._-]+\\.[a-zA-Z]{2,6})|([0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}))(:[0-9]{1,4})*(/[a-zA-Z0-9\\&%_\\./-~-]*)?|(([a-zA-Z0-9\\._-]+\\.[a-zA-Z]{2,6})|([0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}))(:[0-9]{1,4})*(/[a-zA-Z0-9\\&%_\\./-~-]*)?";

Pattern r = Pattern.compile(pattern);
Matcher m;

mTv.setText(identifyUrl(richURL.msg));

SpannableStringBuilderForAllvers identifyUrl public (CharSequence text) { 
    CharSequence contextText; 
    CharSequence clickText; 
    text == null text = "": text;? 
    // The following have been present for splicing spanText 
    SpannableStringBuilderForAllvers span = new new SpannableStringBuilderForAllvers (text); 
    ClickableSpan [] = clickableSpans span.getSpans (0, text.length (), ClickableSpan.class); 
    IF (clickableSpans.length> 0) { 
        int Start = 0; 
        int End = 0; 
        for (int I = 0; I <clickableSpans.length; I ++ ) { 
            Start = span.getSpanStart (clickableSpans [0]); 
            End = span.getSpanEnd (clickableSpans [I]); 
        } 
        // clickable text that follows the page content
        contextText = text.subSequence(end, text.length());
        //可点击文本
        clickText = text.subSequence(start, end);
    } else {
        contextText = text;
        clickText = null;
    }
    m = r.matcher(contextText);
    //匹配成功
    while (m.find()) {
        //得到网址数m.group()
        if (m.start() < m.end()) {
            span.setSpan(new LinkClickSpan(m.group(), m.group(), mUrlSpanClickListener),
                    m.start(), m.end(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
        }
    }
    return span;
}

private static final String HTTPS = "https://";
private static final String HTTP = "http://";
private static final String FTP = "ftp://";

public static boolean hasNetUrlHead(String url) {
    return (!TextUtils.isEmpty(url)) && (url.startsWith(HTTP) || url.startsWith(HTTPS) || url.startsWith(FTP));
}

private UrlSpanClickListener mUrlSpanClickListener = new UrlSpanClickListener() {
    @Override
    public void onClick(View view, String url, String content) {
        if (TextUtils.isEmpty(url)) {
            return;
        }
        Matcher url_matcher = Patterns.WEB_URL.matcher(url);
        if (url_matcher.matches()) {
            String tempUrl;
            if (hasNetUrlHead(url)) {
                tempUrl = url;
            } else {
                tempUrl = HTTPS + url;
            }
            //通过webview打开相应的url

            //Bundle bundle = new Bundle();
            //bundle.putString(WebCordovaBaseFragment.EXTRA_URL, tempUrl);
            //bundle.putBoolean(WebCordovaBaseFragment.ENABLE_WEB_TITLE, true);
            //WebViewActivity.presentWeb(Utilities.getApplicationContext(), WebViewActivity.class, WebCommonFragment.class, content, bundle);
        }
    }
};

public interface UrlSpanClickListener {
    void onClick(View view, String url, String content);
}

public static class LinkClickSpan extends ClickableSpan {
    private int mColor = Utilities.getApplicationContext().getResources().getColor(R.color.yc_color_007AFF_CBN);
    private String mUrl;
    private String mContent;
    UrlSpanClickListener mClickListener;

    public LinkClickSpan(String url, String content, UrlSpanClickListener onClickListener) {
        super();
        mUrl = url;
        mContent = content;
        mClickListener = onClickListener;
    }

    @Override
    public void updateDrawState(TextPaint ds) {
        ds.setColor(mColor);
        ds.linkColor = mColor;
        ds.setUnderlineText(true);//设置是否下划线
        ds.clearShadowLayer();
    }

    @Override
    public void onClick(View widget) {
        if (mClickListener != null) {
            mClickListener.onClick(widget, mUrl, mContent);
        }
    }
}

public class SpannableStringBuilderForAllvers extends SpannableStringBuilder{

    public SpannableStringBuilderForAllvers() {
        super("");
    }
    public SpannableStringBuilderForAllvers(CharSequence text) {
        super(text, 0, text.length());
    }
    public SpannableStringBuilderForAllvers(CharSequence text, int start, int end){
        super(text,start,end);
    }

    @Override
    public SpannableStringBuilder append(CharSequence text) {
       if (text == null) {
           return this;
       }
        int length = length();
        return (SpannableStringBuilderForAllvers)replace(length, length, text, 0, text.length());
    } 

    / ** This method supports only the original API which API21 or more, where low adaptive version * / 
    public SpannableStringBuilderForAllvers the append (CharSequence text, What Object, int the flags) { 
        IF (text == null) { 
            return the this; 
        } 
        int = Start length (); 
        the append (text); 
        setSpan (What, Start, length (), the flags); 
        return the this; 
    } 
}

public class ClickableSpanTextView extends AppCompatTextView {

    private BackgroundColorSpan backgroundColorSpan;
    private boolean hasSpan;

    public ClickableSpanTextView(Context context) {
        super(context);
        init();
    }

    public ClickableSpanTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public ClickableSpanTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        setMovementMethod(LinkMovementMethod.getInstance());
        backgroundColorSpan = new BackgroundColorSpan(getContext().getResources().getColor(R.color.yc_color_4B4B4B_CDG));
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        boolean handled = super.onTouchEvent(event);
        int action = event.getAction();

        if (!(getText() instanceof Spannable)) {
            return handled;
        }

        Spannable spannable = (Spannable) getText();
        if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_DOWN) {
            int x = (int) event.getX();
            int y = (int) event.getY();
            x -= getTotalPaddingLeft();
            y -= getTotalPaddingTop();
            x += getScrollX();
            y += getScrollY();
            Layout layout = getLayout();
            int line = layout.getLineForVertical(y);
            int off = layout.getOffsetForHorizontal(line, x);
            if (off >= getText().length()) {
                int off1 = layout.getOffsetForHorizontal(line, x - getTextSize());
                if (off == off1) {
                    return handled;
                }
            }

            ClickableSpan[] links = spannable.getSpans(off, off, ClickableSpan.class);
            if (links.length > 0) {
                ClickableSpan clickableSpan = links[0];
                int start = spannable.getSpanStart(clickableSpan);
                int end = spannable.getSpanEnd(clickableSpan);

                if (action == MotionEvent.ACTION_DOWN && !hasSpan) {
                    spannable.setSpan(backgroundColorSpan, start, end, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
                    hasSpan = true;
                } else if (hasSpan) {
                    spannable.removeSpan(backgroundColorSpan);
                    hasSpan = false;
                }
            }
            return links.length != 0;
        } else {
            if (hasSpan && action != MotionEvent.ACTION_MOVE) {
                spannable.removeSpan(backgroundColorSpan);
                hasSpan = false;
            }
        }
        return handled;
    }
}