Edittext仅允许字母(以编程方式) [英] Edittext only allow letters (programmatically)

问题描述

我正在尝试获取只允许使用字母(小写和大写)的editTextview.

I'm trying to get an editTextview that only allows letters (lower- and uppercase).

它与以下代码配合使用:

It works with this code:

 edittv.setKeyListener(DigitsKeyListener.getInstance("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"));

问题是我得到了这样的数字键盘:

The problem is that I get a numerical keyboard like this:

要回到普通键盘，我找到了以下代码:

To go back to a normal keyboard I found this code:

edittv.setKeyListener(DigitsKeyListener.getInstance("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"));
edittv.setInputType(InputType.TYPE_CLASS_TEXT);

它可以使键盘恢复原状，但随后又允许所有字符，因此撤消了先前的代码.

It works for getting the keyboard back but then all characters are allowed again, so it undo's the previous code.

所以，我怎么只能以编程方式只允许使用字母键盘的字母.

So, how can I only allow letters with an alphabetical keyboard programatically.

推荐答案

您可以在下面使用此代码:

You can use this code below:

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 (!Character.isLetter(source.charAt(i))&&!Character.isSpaceChar(source.charAt(i))) {
            return "";
        }
    }
    return null;
}
};
edit.setFilters(new InputFilter[] { filter });

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