java.lang.ClassNotFoundException: Didn't find class "androidx.core.view.ViewPager" on path

Question

I just migrated my project to androidx and i am getting an inflation error for inflating viewpager component...I replaced android.support.v4.view.ViewPager with androidx.viewpager.widget.ViewPager

This my xml file

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="fill_parent"
      android:padding="@dimen/_1dp"
      android:layout_height="wrap_content"
      android:background="@color/banner_border_color">

      <androidx.viewpager.widget.ViewPager
           android:id="@+id/vp_slider"
           android:layout_width="match_parent"
           android:layout_height="@dimen/_140dp"
           android:background="@drawable/thumb_new_background" />

           <RelativeLayout
               android:layout_width="wrap_content"
               android:layout_height="wrap_content"
               android:layout_gravity="bottom">

               <TextView
                   android:id="@+id/tv_banner_view_more"
                   android:layout_width="wrap_content"
                   android:layout_height="wrap_content"
                   android:layout_centerVertical="true"
                   android:layout_marginLeft="@dimen/_16dp"
                   android:background="@drawable/drawable_btn_curved"
                   android:paddingBottom="@dimen/_6dp"
                   android:paddingLeft="@dimen/_8dp"
                   android:paddingRight="@dimen/_8dp"
                   android:paddingTop="@dimen/_6dp"
                   android:visibility="gone"
                   android:text="@string/text_view_more"
                   android:textColor="@color/c_white"
                   android:textSize="@dimen/_8sp" />

     </RelativeLayout>

</FrameLayout>

The Error i'm getting :

Caused by: android.view.InflateException: Binary XML file line #329: Binary XML file line #8: Error inflating class androidx.core.view.ViewPager
         Caused by: android.view.InflateException: Binary XML file line #8: Error inflating class androidx.core.view.ViewPager
         Caused by: java.lang.ClassNotFoundException: Didn't find class "androidx.core.view.ViewPager" on path: DexPathList[

Answer 1

I figure out problem, When we merger to androidx then android studio convert viewpager, swipe to refresh layout and some other views to androidx.core for example viewpager its looks like androidx.core.view.ViewPager but correct is androidx.viewpager.widget.ViewPager please check in your xml layouts and see there is right component is added or not if there is androidx.core then check for right one and replace it. And also import dependency

implementation 'com.google.android.material:material:1.1.0-alpha08

Answer 2

You need to below dependencies in your build.gradle file

implementation 'com.google.android.material:material:1.1.0