RecyclerView ClassNotFound

Question

I tried to add RecyclerView and CardView into my project

dependencies {
compile 'com.android.support:appcompat-v7:21.0.0'
compile 'com.android.support:support-v13:21.0.0'
compile 'com.android.support:cardview-v7:21.0.0'
compile 'com.android.support:recyclerview-v7:21.0.0'
compile 'com.viewpagerindicator:library:2.4.1@aar'
compile project(':facebook')
}

it compiles, but I got below exception when run it on device

Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.RecyclerView" on path: DexPathList[[zip file "/data/app/xxxx.apk"],nativeLibraryDirectories=[/data/app-lib/xxxx, /vendor/lib, /system/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
        at android.view.LayoutInflater.createView(LayoutInflater.java:559)
        at android.view.LayoutInflater.onCreateView(LayoutInflater.java:652)

score 65 · Accepted Answer · answered Oct 28 '14 at 09:25

65

Problem in your layout. Change

<RecyclerView 
   ...

To

<android.support.v7.widget.RecyclerView
   ...

If you create RecyclerView programmatically - make sure you have proper import:

import android.support.v7.widget.RecyclerView;

answered Oct 28 '14 at 09:25

localhost

5,568
1
33
53

yeah, looks like I am using the latest buildtools and it do have the android.view.RecyclerView, so there is no error in android studio, but I am running it on a 4.4.4 device... – Rene Xu Oct 28 '14 at 09:31
In my layout, I have written same, still facing same problem. In CS class I am able to find android.support.v7.widget but not android.support.v7.widget.RecyclerView – Ajay Sharma Mar 22 '16 at 12:53

score 5 · Answer 2 · answered Jun 09 '15 at 23:09

I did all what have been said in this post but nothing worked.

What did work for me:

1.Add this as say up in your build.gradle:

compile 'com.android.support:support-v4:21.0.3'
compile 'com.android.support:appcompat-v7:21.0.0'
compile 'com.android.support:recyclerview-v7:+'
compile 'com.android.support:cardview-v7:+'

2.Add the RecyclerView as a standar View and indicate the class:

    <view
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    class="android.support.v7.widget.RecyclerView"
    android:id="@+id/my_recycler_view"
    />

3.Then add the imports:

import android.support.v7.widget.RecyclerView;

Hope this helps!

I had forgotten recyclerview was its own compile line. Didn't need to do other stuff. — Adam Johns, Sep 07 '15 at 21:39

score 3 · Answer 3 · edited Jul 10 '19 at 21:29

3

If you're looking for solution in 2019, you could try to change android.support.v7.widget.RecyclerView for androidx.recyclerview.widget.RecyclerView. It works for me. Hope it helps!

edited Jul 10 '19 at 21:29

Benkerroum Mohamed

1,867
3
13
19

answered Jul 10 '19 at 19:03

David Pereira

31
1

score 2 · Answer 4 · answered Dec 11 '20 at 08:22

you can use androidx recyclerview widget, this works !

 <androidx.recyclerview.widget.RecyclerView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginLeft="10dp"
    android:layout_marginRight="10dp"
    android:scrollbars="vertical"
    android:id="@+id/listExp"
    />

and import to code,

import androidx.recyclerview.widget.RecyclerView;

and then ready to use ,

 private RecyclerView recyclerViewExp;

score 0 · Answer 5 · edited Dec 15 '21 at 17:44

0

This worked for me:

compile 'com.android.support:support-v4:21.0.3'
compile 'com.android.support:appcompat-v7:21.0.0'
compile 'com.android.support:recyclerview-v7:+'
compile 'com.android.support:cardview-v7:+'

edited Dec 15 '21 at 17:44

Dharman

30,962
25
85
135

answered Apr 15 '15 at 14:30

lgallard

462
3
10

By the way, rendering in Android Studio has some isssues http://code.google.com/p/android/issues/detail?id=72117 http://code.google.com/p/android/issues/detail?id=85118, in my case in version 1.1.0 a don't have previews for recyclerview – lgallard Apr 15 '15 at 15:06

score 0 · Answer 6 · edited May 23 '17 at 11:55

in eclipse, you need to clear other(older) versions of android-support-v4.jar from other libraries which you import directly or indirectly.

for my instance ; my project(TurkRenkleri) includes MobilePlayGround which includes appcompat library(which has a older version of support v4 jar). So i didnt get the error given below, instead i got RecyclerView ClassNotFound.

after doing this , i finally got the error below, and understood problem therefore the solution(delete old jars).

[2015-04-29 00:59:53 - TurkRenkleri] Found 2 versions of android-support-v4.jar in the dependency list,
 [2015-04-29 00:59:53 - TurkRenkleri] but not all the versions are identical (check is based on SHA-1 only at this time).
 [2015-04-29 00:59:53 - TurkRenkleri] All versions of the libraries must be the same at this time.
 [2015-04-29 00:59:53 - TurkRenkleri] Versions found are:
 [2015-04-29 00:59:53 - TurkRenkleri] Path: E:\calisma alani\oyunlar\android-support-v7-appcompat\libs\android-support-v4.jar
 [2015-04-29 00:59:53 - TurkRenkleri]   Length: 621451
 [2015-04-29 00:59:53 - TurkRenkleri]   SHA-1: 5896b0a4e377ac4242eb2bc785220c1c4fc052f4
 [2015-04-29 00:59:53 - TurkRenkleri] Path: E:\calisma alani\oyunlar\RecyclerView\libs\android-support-v4.jar
 [2015-04-29 00:59:53 - TurkRenkleri]   Length: 1157388
 [2015-04-29 00:59:53 - TurkRenkleri]   SHA-1: 605c447c20ca216b5556af9f215af5d4bba1b117
 [2015-04-29 00:59:53 - TurkRenkleri] Jar mismatch! Fix your dependencies

score 0 · Answer 7 · answered Jul 28 '15 at 13:01

0

Make sure is compile 'com.android.support:recyclerview-v7:22.2.0'

answered Jul 28 '15 at 13:01

Libin Thomas

1,132
13
17

score 0 · Answer 8 · answered Jun 14 '16 at 12:51

This worked for me. Add this to app gradle

compile 'com.android.support:design:23.1.1'

Then in your layout

<android.support.v7.widget.RecyclerView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/recyclerView"
    android:layout_centerVertical="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true" />

and in your activity

import android.support.v7.widget.RecyclerView;

and inside your onCreate

RecyclerView recyclerView;

score -2 · Answer 9 · answered Oct 28 '14 at 09:19

It is a Building problem...

Yes in few cases , The code was working previously and suddenly it stopped working (crash at app startup) when I synced and built an older version of the code.

The fix was to just close and restart Eclipse and clean the project and clean all the dependent library projects. Then it started working properly again.

It's some sort of build problem in Eclipse, when refreshing the project files.

Update: In particular, if you've accidentally modified the ".classpath" file (to revert to an older version), Eclipse/Android SDK can get confused and not build the project properly. When you restart Eclipse and clean the project, Eclipse will re-modify the ".classpath" file, and build properly.

If you are going to provide an answer from another related question, please link http://stackoverflow.com/a/20421764 instead of copy+paste. — tir38, Jun 11 '15 at 22:04

RecyclerView ClassNotFound

9 Answers9