hgyixf: 输入空格就会崩溃，[code=java] if (!sb.toString().equals(s.toString())) { int index = start + 1; if (sb.charAt(start) == ' ') {//输入空格，会报越界 if (before == 0) { index++; } else { index--; } } else { if (before == 1) { index--; } } setText(sb.toString()); setSelection(index); } [/code]