Android中TextView实现超过固定行数显示“...展开全部”

 /** * 设置textView结尾...后面显示的文字和颜色 * @param context 上下文 * @param textView textview * @param minLines 最少的行数 * @param originText 原文本 * @param endText 结尾文字 * @param endColorID 结尾文字颜色id * @param isExpand 当前是否是展开状态 */ public void toggleEllipsize(final Context context,    final TextView textView,    final int minLines,    final String originText,    final String endText,    final int endColorID,    final boolean isExpand) { if (TextUtils.isEmpty(originText)) {  return; } textView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver  .OnGlobalLayoutListener() {  @Override  public void onGlobalLayout() {  if (isExpand) {   textView.setText(originText);  } else {   int paddingLeft = textView.getPaddingLeft();   int paddingRight = textView.getPaddingRight();   TextPaint paint = textView.getPaint();   float moreText = textView.getTextSize() * endText.length();   float availableTextWidth = (textView.getWidth() - paddingLeft - paddingRight) *    minLines - moreText;   CharSequence ellipsizeStr = TextUtils.ellipsize(originText, paint,    availableTextWidth, TextUtils.TruncateAt.END);   if (ellipsizeStr.length() < originText.length()) {   CharSequence temp = ellipsizeStr + endText;   SpannableStringBuilder ssb = new SpannableStringBuilder(temp);   ssb.setSpan(new ForegroundColorSpan(context.getResources().getColor     (endColorID)),    temp.length() - endText.length(), temp.length(),    Spannable.SPAN_INCLUSIVE_EXCLUSIVE);   textView.setText(ssb);   } else {   textView.setText(originText);   }  }  if (Build.VERSION.SDK_INT >= 16) {   textView.getViewTreeObserver().removeOnGlobalLayoutListener(this);  } else {   textView.getViewTreeObserver().removeGlobalOnLayoutListener(this);  }  } }); }

boolean isExpandDescripe = false;// 初始展开状态为false，即未展开；Onclick() {...  // 给textView设置点击事件：  case R.id.tv_info_node_describe:  if (isExpandDescripe) {   isExpandDescripe = false;   tv_info_node_describe.setMaxLines(2);// 收起  } else {   isExpandDescripe = true;   tv_info_node_describe.setMaxLines(Integer.MAX_VALUE);// 展开  }  textViewSpanUtil.toggleEllipsize(context,   tv_info_node_describe, 2,   text,   "展开全部",R.color.gray_discovery_ababab, isExpandDescripe);  break;...}