Android studio

貓ʚɞ 2020-07-21 04:40:52

怎么样在点击修改按钮时，限制手机号码只能为11位啊

要是方便的话能不能给下代码,谢谢

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JMchen123 2020-11-27

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自动分隔手机号码通过addTextChangedListener()实现
        etPhone.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }

            @Override
            public void onTextChanged(CharSequence charSequence, int start, int before, int count) {
                if (charSequence == null || charSequence.length() == 0)
                    return;
                StringBuilder stringBuilder = new StringBuilder();
                for (int i = 0; i < charSequence.length(); i++) {
                    if (i != 3 && i != 8 && charSequence.charAt(i) == ' ') {
                        continue;
                    } else {
                        stringBuilder.append(charSequence.charAt(i));
                        if ((stringBuilder.length() == 4 || stringBuilder.length() == 9)
                                && stringBuilder.charAt(stringBuilder.length() - 1) != ' ') {
                            stringBuilder.insert(stringBuilder.length() - 1, ' ');
                        }
                    }
                }
                if (!stringBuilder.toString().equals(charSequence.toString())) {
                    int index = start + 1;
                    if (stringBuilder.charAt(start) == ' ') {
                        if (before == 0) {
                            index++;
                        } else {
                            index--;
                        }
                    } else {
                        if (before == 1) {
                            index--;
                        }
                    }
                    etPhone.setText(stringBuilder.toString());
                    etPhone.setSelection(index);
                }
            }

            @Override
            public void afterTextChanged(Editable s) {
            }
        });

简单吗 2020-11-10

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public final static String PHONE_PATTERN = "^((1[0-9][0-9]))\\d{8}$"; /** * 正则表达式匹配判断 * @param * @param input 需要做匹配操作的字符串 * @return true if matched, else false */ public static boolean isPhoneNumber( CharSequence input) { Pattern pattern = Pattern.compile(PHONE_PATTERN); Matcher matcher = pattern.matcher(input); if (matcher.find()) { return true; } return false; } 通过此方法判断输入内容是否为手机号

貓ʚɞ 2020-07-23