Android EditText过滤汉字的方法

第一种方法

//过滤汉字
        InputFilter filter = new InputFilter() {
            public CharSequence filter(CharSequence source, int start, int end,
                                       Spanned dest, int dstart, int dend) {
                for (int i = start; i < end; i++) {
                    if (!isChinese(source.charAt(i))) {
                        return "";
                    }
                }
                return null;
            }
        };
        //设置过滤器  设置最多输入个数
        EditText.setFilters(new InputFilter[]{filter, new InputFilter.LengthFilter(5)});

 /**
     * 判定输入汉字
     *
     * @param c
     * @return
     */
    public static boolean isChinese(char c) {
        Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);
        if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS
                || ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS
                || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A
                || ub == Character.UnicodeBlock.GENERAL_PUNCTUATION
                || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION
                || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS) {
            return true;
        }
        return false;
    }

第二种方法

    public static String stringFilter1(String str) throws PatternSyntaxException {
        //只允许汉字
        String regEx = "[^\u4E00-\u9FA5]";
        Pattern p = Pattern.compile(regEx);
        Matcher m = p.matcher(str);
        return m.replaceAll("").trim();
    }
    

然后自己写EditText监听方法的时候调用做判断

推荐使用第一种写法，目前未发现问题。第二种方法在华为系统5.0.2的版本中会出现输入框输入不了内容的情况