Android 编辑文本

发布于 2024-10-30 04:37:57 字数 775 浏览 0 评论 0原文

我是 Android 初学者。我有一个字母的 EditText。它只接受字符。当用户在键盘上输入不同的字符时，我需要用新字符替换输入的字符。我怎样才能做到这一点？这可能吗？

// Set edit text width only to one character
    InputFilter[] FilterArray = new InputFilter[2];
    FilterArray[0] = new InputFilter.LengthFilter(1);
    FilterArray[1] = 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 (!Character.isLetter(source.charAt(i))
                        && !Character.isSpaceChar(source.charAt(i))) {
                    return "";
                }
            }
            return null;
        }
    };
    editLetter.setFilters(FilterArray);

原文

I am a beginner in Android.
I have an EditText for one letter. It accepts only characters. I need to replace entered character with the new one when the user enters different character on the keyboard. How can I achive that? Is this possible?

// Set edit text width only to one character
    InputFilter[] FilterArray = new InputFilter[2];
    FilterArray[0] = new InputFilter.LengthFilter(1);
    FilterArray[1] = 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 (!Character.isLetter(source.charAt(i))
                        && !Character.isSpaceChar(source.charAt(i))) {
                    return "";
                }
            }
            return null;
        }
    };
    editLetter.setFilters(FilterArray);

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離殇 2024-11-06 04:37:57

考虑使用正则表达式和replaceAll，如下所示：

// ASSERT inString not null
public static String removeTags(String inString) throws IllegalArgumentException {
    if (inString == null) {throw new IllegalArgumentException();}
    return inString.replaceAll("<.*>","");
}

这个答案可能对您有帮助，也可能根本没有帮助。

Consider using regular expressions and replaceAll as in:

// ASSERT inString not null
public static String removeTags(String inString) throws IllegalArgumentException {
    if (inString == null) {throw new IllegalArgumentException();}
    return inString.replaceAll("<.*>","");
}

This answer may or may not help you at all.

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