/**  * 字符串顯示到textView, textView maxLines=2  * 如果字符串太長顯示不下，則用省略號代替  * 省略號的位置在第一行末尾  *  * @param textView 顯示字符串的view  * @param str  要顯示的字符串  * @param width 顯示字符串的view的寬  * @return 處理后帶省略號的字符串  */ private String ellipsizeString(TextView textView, String str, int width) {  Paint paint = textView.getPaint();  //文字總寬小于2倍的view寬，說明小于2行，直接返回  if (paint.measureText(str) < 2 * width) {   return str;  }  //存儲顯示到view的每行文字  List<String> list = new ArrayList<>();  int len = 0;  int start, end = 0;  while (len < str.length()) {   len += end;   int count = paint.breakText(str, end, str.length(), true, width, null);   start = end;   end = end + count;   list.add(str.substring(start, end));  }  //第一行文字末尾三個字符替換成省略號  String line1 = list.get(0);  line1 = line1.substring(0, line1.length() - 3) + "...";  //最后一行半的文字從末尾向前截取一行文字  String endLine = list.get(list.size() - 1);  int endLineWidth = (int) paint.measureText(endLine);  String minorEndLine = list.get(list.size() - 2);  int minorCuteCount = paint.breakText(minorEndLine, 0, minorEndLine.length(), true, endLineWidth, null);  String line2 = minorEndLine.substring(minorCuteCount, minorEndLine.length()) + endLine;  return line1 + line2; }

paint.measureText(str) //測量字符串的寬度 paint.breakText(str, end, str.length(), true, width, null); //計算指定寬度下顯示的字符串數量