Unable to bind User model to View with Android Binding

[guilmarc]

Here, when the mUserLiveData is fetched, UI is not updated

public void fetchProfile(@NonNull int userId  ) {
        setIsLoading(true);
        getCompositeDisposable().add(getDataManager()
                .getUserApiCall( userId )
                .subscribeOn(getSchedulerProvider().io())
                .observeOn(getSchedulerProvider().ui())
                .subscribe(response -> {
                    if (response != null) {
                        mUserLiveData.setValue( response );
                    }
                    setIsLoading(false);
                }, throwable -> {
                    setIsLoading(false);
                    getNavigator().handleError(throwable);
                }));
    }

    public String getFirstName() {
        return mUserLiveData.getValue().getFirstName();
    }

    public String getLastName() {
        return mUserLiveData.getValue().getLastName();
    }

UI

                <android.support.design.widget.TextInputLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_alignParentEnd="true"
                    android:layout_alignTop="@+id/profile_thumbnail_circleimageview"
                    android:layout_toEndOf="@+id/profile_thumbnail_circleimageview">

                    <android.support.design.widget.TextInputEditText
                        android:id="@+id/profile_firstname_edittext"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:hint="@string/translate_firstname"
                        android:inputType="textCapSentences|textPersonName"
                        android:text="@={viewModel.firstName}"/>
                </android.support.design.widget.TextInputLayout>

                <!-- Name Label -->
                <android.support.design.widget.TextInputLayout
                    android:id="@+id/textInputLayout2"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_alignBottom="@+id/profile_thumbnail_circleimageview"
                    android:layout_toEndOf="@+id/profile_thumbnail_circleimageview">

                    <android.support.design.widget.TextInputEditText
                        android:id="@+id/profile_lastname_edittext"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:hint="@string/translate_lastname"
                        android:inputType="textCapSentences|textPersonName"
                        android:text="@={viewModel.lastName}"/>
                </android.support.design.widget.TextInputLayout>