override fun emailValidationErrorState(state: Boolean) {
    if (!state) {
        tiet_email.setTextColor(Color.rgb(255, 70, 70))
        til_email.setHintTextAppearance(R.style.loginError)
        til_email.hint = "Email: Invalid email !"
        til_email.isErrorEnabled = true
        til_email.setErrorTextAppearance(R.style.loginError)

    } else {
        tiet_email.setTextColor(Color.rgb(92, 92, 92))
        til_email.setHintTextAppearance(R.style.loginSuccess)
        til_email.hint = "Email"
    }
}

 <android.support.design.widget.TextInputLayout
    android:id="@+id/til_email"
    android:layout_width="0dp"
    android:layout_height="0dp"
    android:background="@drawable/login_activity_ti_email"
    android:textColorHint="@color/battleship_grey"
    app:hintTextAppearance="@style/loginInputStyling"
    app:layout_constraintBottom_toTopOf="@id/divider"
    app:layout_constraintLeft_toRightOf="@id/guideline_left"
    app:layout_constraintRight_toLeftOf="@id/guideline_right"
    app:layout_constraintTop_toBottomOf="@id/guideline_email_top"
    app:errorEnabled="true"
    android:hint="@string/email"
    >

    <android.support.design.widget.TextInputEditText
        android:id="@+id/tiet_email"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginStart="8dp"
        android:background="@null"
        android:nextFocusDown="@id/tiet_password"
        android:singleLine="true"
        android:textCursorDrawable="@null" />
</android.support.design.widget.TextInputLayout>

<style name="loginError" parent="TextAppearance.AppCompat">
    <item name="android:textColor">@color/invalid_login</item>
    <item name="colorControlActivated">@color/invalid_login</item>
    <item name="colorControlNormal">@color/invalid_login</item>
    <item name="android:textColorPrimary">@color/invalid_login</item>
    <item name="colorAccent">@color/invalid_login</item>
</style>