Missing rules for ProGuard and R8

[dsdebastiani]

Describe the bug I got some errors when running an application with minify enabled.

Additional context Error log:

 java.lang.NoSuchFieldException: No field mScroller in class Lg/w/a/b; (declaration of 'g.w.a.b' appears in /data/app/my.app.package-1/base.apk)
     at java.lang.Class.getDeclaredField(Native Method)
     at com.smarteist.autoimageslider.SliderPager.setScrollDuration(:25)
     at com.smarteist.autoimageslider.SliderView.setSliderAnimationDuration(:298)
     at com.smarteist.autoimageslider.SliderView.a(:120)
     at com.smarteist.autoimageslider.SliderView.<init>(:76)
     at java.lang.reflect.Constructor.newInstance(Native Method)
     at android.view.LayoutInflater.createView(LayoutInflater.java:619)
     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:764)
     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
     at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)
     at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
     at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
     at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
     at my.app.package.k.b.c(:141)
     at my.app.package.k.b.b(:76)
     at androidx.recyclerview.widget.RecyclerView$g.a(:7078)
     at androidx.recyclerview.widget.RecyclerView$v.a(:6235)
     at androidx.recyclerview.widget.RecyclerView$v.b(:6118)
     at androidx.recyclerview.widget.RecyclerView$v.d(:6114)
     at androidx.recyclerview.widget.LinearLayoutManager$c.a(:2303)
     at androidx.recyclerview.widget.LinearLayoutManager.a(:1627)
     at androidx.recyclerview.widget.LinearLayoutManager.a(:1587)
     at androidx.recyclerview.widget.LinearLayoutManager.e(:665)
     at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(:4134)
     at androidx.recyclerview.widget.RecyclerView.onMeasure(:3540)
     at android.view.View.measure(View.java:18804)
     at androidx.constraintlayout.widget.ConstraintLayout.a(:1227)
     at androidx.constraintlayout.widget.ConstraintLayout.onMeasure(:1572)
     at android.view.View.measure(View.java:18804)
     at androidx.constraintlayout.widget.ConstraintLayout.a(:1227)
     at androidx.constraintlayout.widget.ConstraintLayout.onMeasure(:1572)
     at android.view.View.measure(View.java:18804)
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954)
     at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
     at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
     at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
     at android.view.View.measure(View.java:18804)
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954)
     at androidx.coordinatorlayout.widget.CoordinatorLayout.a(:760)
     at com.google.android.material.appbar.b.a(:99)
     at androidx.coordinatorlayout.widget.CoordinatorLayout.onMeasure(:831)
     at android.view.View.measure(View.java:18804)
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954)
     at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
     at android.view.View.measure(View.java:18804)
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954)
     at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
     at android.view.View.measure(View.java:18804)
     at androidx.constraintlayout.widget.ConstraintLayout.onMeasure(:1676)
     at android.view.View.measure(View.java:18804)
     at androidx.drawerlayout.widget.DrawerLayout.onMeasure(:1119)
     at android.view.View.measure(View.java:18804)
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954)
     at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
     at androidx.appcompat.widget.ContentFrameLayout.onMeasure(:146)
     at android.view.View.measure(View.java:18804)
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954)
     at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
     at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
     at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)
     at android.view.View.measure(View.java:18804)
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954)
     at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
     at android.view.View.measure(View.java:18804)
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954)
     at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465)
     at android.widget.LinearLayout.measureVertical(LinearLayout.java:748)
     at android.widget.LinearLayout.onMeasure(LinearLayout.java:630)

My app has an XML layout like:

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <com.smarteist.autoimageslider.SliderView
        android:id="@+id/is_hero_track"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:sliderAnimationDuration="600"
        app:sliderAutoCycleDirection="right"
        app:sliderAutoCycleEnabled="true"
        app:sliderCircularHandlerEnabled="true"
        app:sliderIndicatorAnimationDuration="600"
        app:sliderIndicatorGravity="center_horizontal|bottom"
        app:sliderIndicatorMargin="@dimen/margin_small"
        app:sliderIndicatorOrientation="horizontal"
        app:sliderIndicatorPadding="3dp"
        app:sliderIndicatorRadius="2dp"
        app:sliderIndicatorSelectedColor="@color/white"
        app:sliderIndicatorUnselectedColor="@color/grey_alpha_50"
        app:sliderScrollTimeInSec="5"
        app:sliderStartAutoCycle="true" />
</androidx.constraintlayout.widget.ConstraintLayout>

I tried to put this rule:

-keep class com.smarteist.autoimageslider.** { *; }

I don't get the error anymore. But autoScroll stops working.