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public final static boolean isValidEmail(CharSequence target) {
		if (target == null) {
			return false;
		} else {
			return android.util.Patterns.EMAIL_ADDRESS.matcher(target)
					.matches();
		}
	}

/**
	 * @param email
	 * @return true if email id contains valid characters, false otherwise
	 */
	public static boolean isValidEmail(String email) {
		String emailExp = "^[\\w\\.-]+@([\\w\\-]+\\.)+[A-Z]{2,10}$";
		Pattern pattern = Pattern.compile(emailExp, Pattern.CASE_INSENSITIVE);
		Matcher matcher = pattern.matcher(email);
		return matcher.matches();
	}