Real authentication for for edit text filed android

Authenticate.java

public boolean isFieldValid() {
        // method to check if all fields are filled well in the registration activity

        String name = mUsersName.getText().toString().trim();
        String email = mUsersMail.getText().toString().trim();
        String mobile = mUsersPhone.getText().toString().trim();
        String password = mUserPass.getText().toString().trim();
        String confirmPass = mConfirmPass.getText().toString().trim();
        String address = mAddress.getText().toString().trim();

        if (name.isEmpty() || name.length() < 3) {
            mUsersName.setError("At least 3 characters");
            whenRegisterFails("Name should be at least 3 characters");
            return false;
        } else {
            mUsersName.setError(null);
        }

        if (email.isEmpty() || !Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
            mUsersMail.setError("Enter a valid email address");
            whenRegisterFails("Enter a valid email address");
            return false;
        } else {
            mUsersMail.setError(null);
        }

        if (mobile.isEmpty() || mobile.length() < 11 || mobile.length() > 14) {
            mUsersPhone.setError("Enter Valid Mobile Number");
            whenRegisterFails("Enter Valid Mobile Number");
            return false;
        } else {
            mUsersPhone.setError(null);
        }

        if (password.isEmpty() || password.length() < 4 || password.length() > 10) {
            mUserPass.setError("Between 4 and 10 alphanumeric characters");
            whenRegisterFails("Password must be between 4 and 10 alphanumeric characters");
            return false;
        } else {
            mUserPass.setError(null);
        }

        if (confirmPass.isEmpty() || confirmPass.length() < 4 || confirmPass.length() > 10 || !(confirmPass.equals(password))) {
            mConfirmPass.setError("Passwords do not match");
            whenRegisterFails("Passwords do not match");
            return false;
        } else {
            mConfirmPass.setError(null);
        }
        if (address.isEmpty()) {
            mUsersName.setError("Field Required");
            whenRegisterFails("Address can't be emrty");
            return false;
        } else {
            mUsersName.setError(null);
        }

        return true;
    }

Cool authentication for android developer