Android EditText中的验证允许IP或web Url主机
我需要对我的EditText进行验证,以便它允许我输入有效的文本 ip地址格式(?)即示例132.0.25.225 或 web url格式(www.?)即示例www.example.com 逻辑是,若用户首先键入任何数值,则验证(IP)将执行操作 否则,用户必须在任何web字符串之前写入“www” 注意:它必须执行EditText的onKeyListener() 简而言之,我不打算检查用户何时完成输入并按下OK按钮 任何想法都值得赞赏, 谢谢。ipAndroid EditText中的验证允许IP或web Url主机,android,validation,android-edittext,Android,Validation,Android Edittext,我需要对我的EditText进行验证,以便它允许我输入有效的文本 ip地址格式(?)即示例132.0.25.225 或 web url格式(www.?)即示例www.example.com 逻辑是,若用户首先键入任何数值,则验证(IP)将执行操作 否则,用户必须在任何web字符串之前写入“www” 注意:它必须执行EditText的onKeyListener() 简而言之,我不打算检查用户何时完成输入并按下OK按钮 任何想法都值得赞赏, 谢谢。ip private static final St
private static final String PATTERN =
"^([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\." +
"([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\." +
"([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\." +
"([01]?\\d\\d?|2[0-4]\\d|25[0-5])$";
public static boolean validate(final String ip){
Pattern pattern = Pattern.compile(PATTERN);
Matcher matcher = pattern.matcher(ip);
return matcher.matches();
}
网址
试试这个
public void checkIP(String Value)
{
Pattern pattern = Pattern.compile("[0-255].[0-255].[0-255].[0-255]");
Matcher matcher = pattern.matcher(Value);
boolean IPcheck = matcher.matches();
if(IPcheck)
//it is IP
else
//it is not IP
}
在编辑文本中添加一个
afterTextChanged (Editable s)
使用正则表达式验证输入,如果输入字符与正则表达式不匹配,只需使用以下方法将其删除
Editable.delete(int start, int end)
这个ione非常适合我在android中检查url
if (!URLUtil.isValidUrl(url)) {
Toast.makeText(this, "Invalid URL", Toast.LENGTH_SHORT).show();
return;
}
这里有一个不同的IP地址验证解决方案,但也可以作为web url验证的参考
EditText ipText = (EditText) findViewById(R.id.ip_address);
ipText.setKeyListener(IPAddressKeyListener.getInstance());
public class IPAddressKeyListener extends NumberKeyListener {
private char[] mAccepted;
private static IPAddressKeyListener sInstance;
@Override
protected char[] getAcceptedChars() {
return mAccepted;
}
/**
* The characters that are used.
*
* @see KeyEvent#getMatch
* @see #getAcceptedChars
*/
private static final char[] CHARACTERS =
new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '.' };
private IPAddressKeyListener() {
mAccepted = CHARACTERS;
}
/**
* Returns a IPAddressKeyListener that accepts the digits 0 through 9, plus
* the dot character, subject to IP address rules: the first character has
* to be a digit, and no more than 3 dots are allowed.
*/
public static IPAddressKeyListener getInstance() {
if (sInstance != null)
return sInstance;
sInstance = new IPAddressKeyListener();
return sInstance;
}
/**
* Display a number-only soft keyboard.
*/
public int getInputType() {
return InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_FLAG_DECIMAL;
}
/**
* Filter out unacceptable dot characters.
*/
@Override
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 < splits.length; i++) {
if (Integer.valueOf(splits[i]) > 255) {
return "";
}
}
}
}
return null;
}
公共类IPAddressKeyListener扩展了NumberKeyListener{
接受私人签名;
私有静态IPAddressKeyListener站;
@凌驾
受保护的字符[]getAcceptedChars(){
接受退货;
}
/**
*使用的字符。
*
*@see KeyEvent#getMatch
*@see#getAcceptedChars
*/
私有静态最终字符[]个字符=
新字符[]{'0','1','2','3','4','5','6','7','8','9',';
专用IPAddressKeyListener(){
mAccepted=字符;
}
/**
*返回一个IPAddressKeyListener,它接受数字0到9,加上
*点字符,根据IP地址规则:第一个字符
*为数字,且不允许超过3个点。
*/
公共静态IPAddressKeyListener getInstance(){
if(sInstance!=null)
回归承诺;
sInstance=新IPAddressKeyListener();
回归承诺;
}
/**
*仅显示数字软键盘。
*/
public int getInputType(){
返回InputType.TYPE_类_数| InputType.TYPE_数_标志_小数;
}
/**
*过滤掉不可接受的点字符。
*/
@凌驾
公共CharSequence筛选器(CharSequence源、int开始、int结束、跨区目标、int开始、int结束){
如果(结束>开始){
字符串destTxt=dest.toString();
String resultingTxt=destTxt.substring(0,dstart)
+源.子序列(开始,结束)
+destTxt.substring(dend);
if(!resultingTxt.matches(“^\\d{1,3}”(\\d{1,3})(\\.(\\d{1,3})(\\.(\\d{1,3})?)?)?”){
返回“”;
}否则{
String[]splits=resultingTxt.split(“\\”);
对于(int i=0;i255){
返回“”;
}
}
}
}
返回null;
}
}应使用java.net.InetAddress类。您可以检查IP地址的所有格式:主机地址(例如:132.0.25.225)或主机名(例如:www.google.com); IPv4或IPv6格式正常 源代码应该在工作线程上运行,因为InetAddress.getAllByName(mStringHost)需要很长时间。例如:您从主机名获取地址
Thread mThread = new Thread(new Runnable() {
@Override
public void run() {
try {
String mStringHost = "www.google.com";
//String mStringHost = "192.168.1.2";
InetAddress[] list_address = InetAddress.getAllByName(mStringHost);
if(list_address != null && list_address.length >=1){
InetAddress inetAddress = list_address[0];
Log.d("test","inetAddress ="+ inetAddress.getHostAddress());
if( inetAddress instanceof Inet4Address){
//IPv4 process
}else{
//IPv6 process
}
}else{
throw new Exception("invalid address");
}
}catch(Exception e){
Log.e(TAG,"other exception",e);
Toast.makeText(context, "Invalid host address or host name", Toast.LENGTH_SHORT).show();
//process invalide ip address here
}
}
});
mThread.start()
你的回答很好。它解决了我的IP验证问题,但是新的java.net.URI(url);哪个检查网址格式不起作用相应的URL验证程序URL验证程序=新的URL验证程序();isvalidator.isValid(“);它并没有做我想要做的事情,但有帮助。
Thread mThread = new Thread(new Runnable() {
@Override
public void run() {
try {
String mStringHost = "www.google.com";
//String mStringHost = "192.168.1.2";
InetAddress[] list_address = InetAddress.getAllByName(mStringHost);
if(list_address != null && list_address.length >=1){
InetAddress inetAddress = list_address[0];
Log.d("test","inetAddress ="+ inetAddress.getHostAddress());
if( inetAddress instanceof Inet4Address){
//IPv4 process
}else{
//IPv6 process
}
}else{
throw new Exception("invalid address");
}
}catch(Exception e){
Log.e(TAG,"other exception",e);
Toast.makeText(context, "Invalid host address or host name", Toast.LENGTH_SHORT).show();
//process invalide ip address here
}
}
});
mThread.start()