利用InputFilter限制输入的类型以及字数

private InputFilter mInputFilter; private InputFilter mInputFilterLengh; mInputFilter = new InputFilter() { @Override public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) { String stringSourse = source.toString(); StringBuilder stringBuilder = new StringBuilder(); for (int i = 0; i < stringSourse.length(); i++) { char ch = stringSourse.charAt(i); //只可以输入数字、字母、汉字 String regEx = "[a-zA-Z0-9\u4E00-\u9FA5]"; Pattern p = Pattern.compile(regEx); Matcher m = p.matcher(ch + ""); if (m.matches()) { stringBuilder.append(ch); } } return stringBuilder; } }; mInputFilterLengh = new InputFilter.LengthFilter(30); mEditTextBranch.setFilters(new InputFilter[]{mInputFilter,mInputFilterLengh});