How To Validate Password Field In Android?

Hi I am very new for android and in my app I have Validations for Change password page. That means the Password must contain minimum 8 characters at least 1 Alphabet, 1 Number and

Solution 1:

try following Code

 //*****************************************************************
public static boolean isValidPassword(final String password) {

    Pattern pattern;
    Matcher matcher;
    final String PASSWORD_PATTERN = "^(?=.*[0-9])(?=.*[A-Z])(?=.*[@#$%^&+=!])(?=\\S+$).{4,}$";
    pattern = Pattern.compile(PASSWORD_PATTERN);
    matcher = pattern.matcher(password);
    return matcher.matches();

}

And change your code to this

if(newPassword.getText().toString().length()<8 &&!isValidPassword(newPassword.getText().toString())){
        System.out.println("Not Valid");
      }else{
       System.out.println("Valid");
    }

Solution 2:

publicstatic boolean isValidPassword(String s) {
            PatternPASSWORD_PATTERN=Pattern.compile(
                    "[a-zA-Z0-9\\!\\@\\#\\$]{8,24}");

            return!TextUtils.isEmpty(s) &&PASSWORD_PATTERN.matcher(s).matches();
        }

to use it,

if(isValidPassword(password)){ //password valid}

You can set whatever symbol that you allowed here

Solution 3:

publicstaticbooleanpasswordCharValidation(String passwordEd) {
    StringPASSWORD_PATTERN="^(?=.*[A-Z])(?=.*[@_.]).*$";
    Patternpattern= Pattern.compile(PASSWORD_PATTERN);
    Matchermatcher= pattern.matcher(passwordEd);
    if (!passwordEd.matches(".*\\d.*") || !matcher.matches()) {
        returntrue;
    }
    returnfalse;
}

Solution 4:

Try this it works

publicstatic boolean isPasswordValidMethod(finalString password) {

    Pattern pattern;
    Matcher matcher;
    finalStringPASSWORD_PATTERN="^(?=.*[A-Za-z])(?=.*\\\\d)(?=.*[$@$!%*#?&])[A-Za-z\\\\d$@$!%*#?&]{8,}$""
    pattern = Pattern.compile(PASSWORD_PATTERN);
    matcher = pattern.matcher(password);

    return matcher.matches();

}

Solution 5:

easy piece of code for email field validation and password validation and check for minimum 8 characters in password field.

if (isValidEmail(et_regemail.getText().toString())&&etpass1.getText().toString().length()>7){
      if (validatePassword(etpass1.getText().toString())) {
      Toast.makeText(getApplicationContext(),"Go Ahead".....
      }
      else{

       Toast.makeText(getApplicationContext(),"InvalidPassword".....
       }

}else{

 Toast.makeText(getApplicationContext(),"Invalid Email".....
}


publicboolean validatePassword(finalString password){
    Pattern pattern;
    Matcher matcher;
    finalString PASSWORD_PATTERN = "^(?=.*[0-9])(?=.*[A-Z])(?=.* 
    [@#$%^&+=!])(?=\\S+$).{4,}$";
    pattern = Pattern.compile(PASSWORD_PATTERN);
    matcher = pattern.matcher(password);

    return matcher.matches();
}

publicfinalstaticboolean isValidEmail(CharSequence target) {
    if (target == null)
        returnfalse;

    return android.util.Patterns.EMAIL_ADDRESS.matcher(target).matches();
}