android 过滤ip,EditText Android过滤器的IP地址###。###。###。###？

我使用此过滤器来验证IP地址

localIP.setHintTextColor(Color.parseColor("#aaaaaa"));

InputFilter[] filters = new InputFilter[1];

filters[0] = new InputFilter() {

public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {

if (end > start) {

String destTxt = dest.toString();

String resultingTxt = destTxt.substring(0, dstart) + source.subSequence(start, end) + destTxt.substring(dend);

if (!resultingTxt.matches ("^\\d{1,3}(\\.(\\d{1,3}(\\.(\\d{1,3}(\\.(\\d{1,3})?)?)?)?)?)?")) {

return "";

} else {

String[] splits = resultingTxt.split("\\.");

for (int i=0; i

if (Integer.valueOf(splits[i]) > 255) {

return "";

}

}

}

}

return null;

}

};

localIP.setFilters(filters);

允许的结果是##。##。##。##，我想最多###。###。###。## ＃即可。我该怎么做？