Animating view in fragment

Question

I want a addressCard to scroll down behind another FirstRowCard which are both fragments. I have the addressCard appear behind the other but it doesn't scroll down. I realise I have to use Object Animator and include a View in the arguments.

I was originally using:

View addressCard = (View) getView().findViewById(R.id.years_of_cooking_xp_cardView);
    ObjectAnimator addressCard_Animator = ObjectAnimator.ofFloat(addressCard, "translationY", 0f, 258f);

But the addressCard just appears with no animation. General architecture is Main Activity creates a fragment called topRow_fragment. In topRow_fragment I've created an interface so when a User clicks on a button, it creates the addressCard fragment that is displayed underneath the topRow_fragment. When the User clicks the button, the other fragments disappear and this works fine. I've commented out some parts that I intend on actualising but until the initial animation is completed, I'll ignore them.

I think I haven't correctly identified the View associated with the addressCard and consequently no animation is able to be shown. Any help would be great thanks,

Here's the class:

public class topRow_fragment extends Fragment implements View.OnClickListener{

addressCard_fragment addressCard;
onTopLeftClicked mCallback;
int addressCardLaunch = 0;
String NextAddressCardAnimation = "SLIDE DOWN";
View layoutReturn;

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    layoutReturn = inflater.inflate(R.layout.firstrow_fragment, container, false);
    ImageButton top_row_left_button = (ImageButton) layoutReturn.findViewById(R.id.imageLeft);
    top_row_left_button.setOnClickListener(this);
    return layoutReturn;
}

@Override
public void onClick(View v) {

    addressCard = new addressCard_fragment();
    FragmentManager fragmentManager = getFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
    fragmentTransaction.add(R.id. Below_top_row_fragment_container, addressCard);

    View addressCard = (View) getView().findViewById(R.id.years_of_cooking_xp_cardView);
    ObjectAnimator addressCard_Animator = ObjectAnimator.ofFloat(addressCard, "translationY", 0f, 258f);

    //CardView addressCard_View = (CardView) getView().findViewById(R.id.years_of_cooking_xp_cardView);
    //ObjectAnimator addressCard_Animator = ObjectAnimator.ofFloat(addressCard_View, "translationY", 0f, 258f);

    switch(v.getId()) {
        case R.id.imageLeft:
            if (addressCardLaunch == 0) {
                fragmentTransaction.commit();
                moveSecondRowAfterClick(0);
                addressCard_Animator.setDuration(250);
                addressCard_Animator.start();
                moveSecondRowAfterClick(0);
                addressCardLaunch = 1;
            }

            else if (addressCardLaunch == 1) {
                switch (NextAddressCardAnimation) {

                    case "SLIDE DOWN":
                        NextAddressCardAnimation = "SLIDE UP";
                        moveSecondRowAfterClick(1);
                        //addressCard_Animator.setInterpolator(new SlideDownAnimationInterpolator());
                        //addressCard_Animator.setDuration(250);
                        //addressCard_Animator.start();
                        break;

                    case "SLIDE UP":
                        NextAddressCardAnimation = "SLIDE DOWN";
                        moveSecondRowAfterClick(0);
                        //addressCard_Animator.setDuration(250);
                        //addressCard_Animator.start();
                        break;
                }
            }
    }
}

public interface onTopLeftClicked {
    void moveSecondRow(int slidingAnimationStatus);
}

@Override
public void onAttach(Context context) {
    super.onAttach(context);
    Activity a;
    if (context instanceof Activity) {
        a = (Activity) context;

        try {
            mCallback = (onTopLeftClicked) a;
        }
        catch (ClassCastException e) {
            throw new ClassCastException(a.toString() + " must implement onTopLeftClicked Interface");
        }
    }
}

@Override
public void onDetach() {
    mCallback = null;
    super.onDetach();
}

public void moveSecondRowAfterClick(int slidingAnimationStatus) {
    mCallback.moveSecondRow(slidingAnimationStatus);
}}

Update01: I included methods within the fragment class, slideUpAnimation and slideDownAnimation and this has resolved a NullPointerException that I had. Yet to successfully animate the addressCard upon initialisation or subsequent button clicks. This approach is more in line with encapsulation rather than calling the animations within the topRow_fragment class. I'm wondering if this could now relate to view constraints I've emplaced on the CardView in the respective XML file.

Main Activity XML where the fragments are called, both topRow_fragment and addressCard.

<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.bryanjordan.settingsr11.MainActivity">

<android.support.constraint.ConstraintLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <android.support.constraint.ConstraintLayout
        android:layout_width="368dp"
        android:layout_height="wrap_content"
        tools:layout_editor_absoluteY="8dp"
        android:id="@+id/constraintLayout"
        android:layout_marginLeft="8dp"
        app:layout_constraintLeft_toLeftOf="parent"
        android:layout_marginRight="8dp"
        app:layout_constraintRight_toRightOf="parent">

        <RelativeLayout
            android:id="@+id/Below_top_row_fragment_container"
            android:layout_width="367dp"
            android:layout_height="wrap_content"
            android:layout_marginLeft="8dp"
            android:layout_marginRight="8dp"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            android:layout_marginStart="8dp"
            android:layout_marginEnd="8dp"
            tools:layout_editor_absoluteY="16dp">

        </RelativeLayout>

        <RelativeLayout
            android:id="@+id/Above_top_row_fragment_container"
            android:layout_width="367dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:layout_marginEnd="8dp"
            tools:layout_editor_absoluteY="8dp"
            tools:layout_editor_absoluteX="1dp">
        </RelativeLayout>


    </android.support.constraint.ConstraintLayout>

    <android.support.constraint.ConstraintLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        app:layout_constraintTop_toBottomOf="@+id/constraintLayout"
        android:layout_marginLeft="8dp"
        app:layout_constraintLeft_toLeftOf="parent"
        android:layout_marginRight="8dp"
        app:layout_constraintRight_toRightOf="parent">

        <RelativeLayout
            android:id="@+id/second_row_fragment_container"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="8dp"
            android:layout_marginLeft="6dp"
            android:layout_marginRight="8dp"
            android:layout_marginStart="8dp"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            tools:layout_editor_absoluteY="25dp"></RelativeLayout>
    </android.support.constraint.ConstraintLayout>

</android.support.constraint.ConstraintLayout>

Update02: I've looked at how slideDownAnimation and slideUpAnimation work and these are both being called correctly but the View just isn't moving. This is clearly a problem regarding assignment - I think it stems from the way the fragments are called.

Firstly, topRow_fragment is called then when the User clicks on a button below_topRow_fragmentis created. I've been looking at using:

View layoutTest = layoutReturn.findViewById(R.id.Below_top_row_fragment_container);
            View addressTestR2 = (View) layoutTest.findViewById(R.id.years_of_cooking_xp_cardView);

And having NullPointerException errors but this seems to be the right direction as I'd have to call the respective child fragments to get to the one I want before then assigning it.