Android输入指定字符

 mEditText.setKeyListener(new NumberKeyListener() {
            @Override
            protected char[] getAcceptedChars() {
                char[] chars = {‘0‘, ‘1‘, ‘2‘, ‘3‘, ‘4‘, ‘5‘, ‘6‘, ‘7‘, ‘8‘, ‘9‘, ‘.‘};
                return chars;
            }

            @Override
            public int getInputType() {
                return InputType.TYPE_CLASS_NUMBER;
            }
        });