Can't get objectAnimator working with xFraction

Question

I'm trying to animate a slide-in/slide-out animation between Fragments. I know there're tons of similiar question out there on StackOverflow, but believe me - I tried all of them and none is working.

Following my code (basically taken from similiar questions):

Custom Layout

public class SlidingFrameLayout extends FrameLayout {

    public SlidingFrameLayout(Context context) {
        super(context);
    }

    public SlidingFrameLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public float getXFraction() {
        final int width = getWidth();
        if (width != 0) return getX() / getWidth();
        else return getX();
    }

    public void setXFraction(float xFraction) {
        final int width = getWidth();
        setX((width > 0) ? (xFraction * width) : -9999);
    }
}

Fragment Transaction

FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.setCustomAnimations(R.animator.card_enter_right, R.animator.card_out_left);
ft.replace(R.id.quiz_container, CardFragment.newInstance());
ft.commit();

Object animator

<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="1000"
    android:interpolator="@android:anim/linear_interpolator"
    android:propertyName="xFraction"
    android:valueFrom="1.0"
    android:valueTo="0.0"
    android:valueType="floatType" />

Layout file

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.my.package.views.SlidingFrameLayout
        android:id="@+id/quiz_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <!-- Other views -->

</FrameLayout>

So when I'm running this code nothing happens. The Fragments get replaced but without an animation.
What am doing wrong?

Note: If I'm running the animation with "x" instead of "xFraction" and changing the values to let's say from:1280 to:0 it's working. Unfortunately this isn't a solution for me, since I need a "percentage value" because of the broad range of display resolutions.

---

Solution

Thanks to pskink who led me to the solution. I always thought that the container of my Fragment needs to implement the getXFraction()/setXFraction() method. But that's not true. You're Fragments layout needs to implement getXFraction()/setXFraction. So basically I changed my Fragment-Layout from something like this:

<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:prefix="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="40dp"
    prefix:cardCornerRadius="4dp">

<!-- Content -->
</android.support.v7.widget.CardView>

to:

<com.my.package.views.SlidingFrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:prefix="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="40dp"
        prefix:cardCornerRadius="4dp">

<!-- Content -->
    </android.support.v7.widget.CardView>
</com.my.package.views.SlidingFrameLayout>

Answer 1

setXFraction and getXFraction should be defined in the root view: the view you return from onCreateView, in your case custom CardView