Validation

public class Validation {

//Regular Expression
private static final String EMAIL_REGEX = "^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";
private static final String PHONE_REGEX = "\\d{3}-\\d{7}";
private static final String MOBILE_REGX = "\\d{4}-\\d{7}";

// Error Messages
private static final String REQUIRED_MSG = "required";
private static final String EMAIL_MSG = "invalid email";
private static final String PHONE_MSG = "###-#######";
private static final String MOBILE_MSG = "####-#######";
private static final String PASSWORD_MSG = "password not matching";

public static boolean isMatching(EditText editText, EditText editText1, boolean required) {
return check(editText, editText1, PASSWORD_MSG, required);
}

private static boolean check(EditText editText, EditText editText1,
String passwordMsg, boolean required) {

String text = editText.getText().toString().trim();
String text1 = editText1.getText().toString().trim();

editText.setError(null);
editText1.setError(null);

if ( required && isTextnotEmpty(editText) && isTextnotEmpty(editText1) ) return false;

if(required && !text1.equals(text)){
editText1.setError(passwordMsg);
return false;
}

return true;
}

/**Checks for Validity of Email Address
* @param email the input email address
* @param required pass true if it is required, false if not
* @return true if valid email address, false if not
*
* */
public static boolean isValidEmailAddress(EditText email, boolean required) {
return isValid(email, EMAIL_REGEX, EMAIL_MSG, required);
}

/**Checks for Validity of Phone Number
* @param phone_no the input phone number
* @param required pass true if it is required, false if not
* @return true if valid phone number, false if not
*
* */
public static boolean isValidPhoneNumber(EditText phone_no, boolean required) {
return isValid(phone_no, PHONE_REGEX, PHONE_MSG, required);
}

public static boolean isValidMobileNumber(EditText phone_no, boolean required) {
return isValid(phone_no, MOBILE_REGX, MOBILE_MSG, required);
}


/**Checks for Validity of Any Input Field with the regular expression in it
* @param mytext the input text field to check
* @param regex the regular expression which can appear in it
* @param errMsg the error message to set if field is not valid
* @param required pass true if it is required, false if not
* @return true if valid input field, false if not
*
* */

public static boolean isValid(EditText mytext, String regex, String errMsg, boolean required) {

String text = mytext.getText().toString().trim();
// clearing the error, if it was previously set by some other values
mytext.setError(null);

// text required and editText is blank, so return false
if ( required && !isTextnotEmpty(mytext) ) return false;

// pattern doesn't match so returning false
if (required && !Pattern.matches(regex, text)) {
mytext.setError(errMsg);
return false;
};

return true;
}

/**Checks whether input field is empty of not
* @param mytext the input text field to check
* @return true if input field is not empty, false if not
* */

public static boolean isTextnotEmpty(EditText mytext) {

String text = mytext.getText().toString().trim();
mytext.setError(null);

if (text.length() == 0) {
mytext.setError(REQUIRED_MSG);
return false;
}

return true;
}

public static boolean isTextNotTooLong(EditText mytext, String message) {

String text = mytext.getText().toString().trim();
mytext.setError(null);

if (text.length() > 20) {
mytext.setError(message);
return false;
}

return true;
}

public static boolean doesBtnContainDate(Button btn, String message, Context context) {

String text = btn.getText().toString().trim();
btn.setError(null);

if ( !text.contains(",") ) {
btn.setError(message);
Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
return false;
}

return true;
}
}