android TextView中识别多个url并分别点击跳转方法详解

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));public SpannableStringBuilderForAllvers identifyUrl(CharSequence text) {  CharSequence contextText;  CharSequence clickText;  text = text == null ? "" : text;  //以下用于拼接本来存在的spanText  SpannableStringBuilderForAllvers span = 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]);    }    //可点击文本后面的内容页    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());  }  /**该方法在原API里面只支持API21或者以上，这里适应低版本*/  public SpannableStringBuilderForAllvers append(CharSequence text, Object what, int flags) {    if (text == null) {      return this;    }    int start = length();    append(text);    setSpan(what, start, length(), flags);    return 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;  }}