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[

look like the error is in different xml file, search whole your project about androidx.core.view.ViewPager. if you don't find any place use androidx.core.view.ViewPager, then just need to clean project — Linh
– Linh, Commented Jul 16, 2019 at 6:03
post your app build.gradle file. Hope you have not included it in any aar library — Santanu Sur
– Santanu Sur, Commented Jul 16, 2019 at 6:04
Have u added below implementation 'com.google.android.material:material:1.1.0-alpha06' dependencies in your build.gradle` file — AskNilesh
– AskNilesh, Commented Jul 16, 2019 at 6:05

dev_swat · Accepted Answer · 2019-07-18 04:54:02Z

39

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

answered Jul 18, 2019 at 4:54

dev_swat

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1 Comment

RayBacker Over a year ago

@dev_swat Thanks a ton. for the catch in the XML layout

HourGlass · Accepted Answer · 2020-04-01 17:27:41Z

6

You need to below dependencies in your build.gradle file

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

edited Apr 1, 2020 at 17:27

HourGlass

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answered Jul 16, 2019 at 6:02

AskNilesh

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4 Comments

dev_swat Over a year ago

alpha08 is lattes avilable or need to stick with 06?

AskNilesh Over a year ago

@dev_swat it's your choice if you want to use alpha08 or alpha06 I'm currently using alpha06

dev_swat Over a year ago

app still crashing after adding dependency :(

AskNilesh Over a year ago

@dev_swat can u share latest crash log with question after adding these dependencies

m4n0 · Accepted Answer · 2021-09-20 10:21:41Z

1

You need to add below dependencies in your build.gradle file

implementation 'com.google.android.material:material:1.4.0

edited Sep 20, 2021 at 10:21

m4n0

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answered Sep 20, 2021 at 10:02

seied mostafa Eftekhary

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Comments

Joseph Cole · Accepted Answer · 2019-07-17 01:10:14Z

0

I think you need to Invalidate caches and restart

Go to File > Invalidate caches/Restart > ** Invalidate

Then rebuild project

answered Jul 17, 2019 at 1:10

Joseph Cole

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shubomb · Accepted Answer · 2023-04-12 20:19:38Z

0

Upgrade build.gradle and gradle wrapper version

     classpath 'com.android.tools.build:gradle:4.2.1'
     distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-all.zip

answered Apr 12, 2023 at 20:19

shubomb

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