android.support.v7.widget.CardView could not be found (Android Studio 1.1 Preview)

Question

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I'm trying to add CardView to my activity as the official sample. But it doesn't work.

If I run my project directly, it would lead to java.lang.ClassNotFoundException: android.support.v7.widget.CardView .

score 100 · Accepted Answer · edited May 31 '18 at 17:04

100

You should add it to your build.gradle:

dependencies {
    ...
    implementation 'com.android.support:cardview-v7:21.+'
    implementation 'com.android.support:recyclerview-v7:21.+'
    ...
}

edited May 31 '18 at 17:04

Khemraj Sharma

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answered Feb 03 '15 at 15:33

Eun

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Note: Make sure you add this to the correct build.gradle file, for me it was the one marked "Module: app", not "Project: Projectname". – Gerald Schneider Feb 17 '15 at 12:20
This page is nice to use when you need dependencies like this: http://gradleplease.appspot.com/ – TouchBoarder May 23 '15 at 05:08
2

For api 23, it should be revised like 'com.android.support:cardview-v7:23.+' and 'com.android.support:recyclerview-v7:23.+' – Beytan Kurt Mar 26 '16 at 18:37
3

Make sure to clean project (build) after this. – prasang7 Aug 13 '16 at 10:52
Thanks! Any idea how to find the most up to date String? I'm having difficulty finding the correct string for API 26. – Greg Hilston Jun 20 '17 at 23:37
For new people: see lower down solutions as this is deprecated now! – JFreeman Jun 15 '21 at 07:53

score 9 · Answer 2 · answered Nov 04 '19 at 18:57

With the release of Android 9.0 (API level 28) there is a new version of the support library called AndroidX

And the support library will be discontinued...

Add the following to buld.gradle:app

dependencies {
    ...
    implementation 'androidx.recyclerview:recyclerview:1.0.0'
    implementation 'androidx.cardview:cardview:1.0.0'
    ...
}

Vinay Vissh · Answer 3 · 2018-10-04T07:42:54.343

Writing my answer to provide:

1) updated version for compileSdkVersion 27.

2) usage of implementation instead of compile - What's the difference between implementation and compile in Gradle?.

3) a complete version number to heed the Avoid using + in version numbers; can lead to unpredictable and unrepeatable builds.., warning shown by Android Studio.

4) a visual for location of build.gradle (Module:app).

5) And because I was not able to write a comment below @Eun's answer.

You need to paste implementation 'com.android.support:cardview-v7:27.1.1' in build.gradle [Module:app] located at, for example: MyFirstApplication -> app -> build.gradle

Paste in following dependencies clause:

dependencies {
   implementation fileTree(dir: 'libs', include: ['*.jar'])
   ...
   implementation 'com.android.support:appcompat-v7:27.1.1'


   implementation 'com.android.support:cardview-v7:27.1.1'


   ...
}

To open from Android studio itself: (From left side) 1:Project -> Select Android view -> Gradle Scripts -> build.gradle (Module: app)

That is:
(If the image below is not shown You can find the image here.

Using Android Studio 3.1.4

Edit: Updated version numbers.

Salah · Answer 4 · 2020-06-27T07:36:05.307

It is all because of dependency and android version problems.

Solution:

For RecyclerView:

<androidx.recyclerview.widget.RecyclerView/>

Instead of: <android.support.v7.widget.CardView..

For CardView:

<androidx.cardview.widget.CardView/>

Instead of: <android.support.v7.widget.RecyclerView..

**Or simply search for and drag and drop, CardView, RecyclerView ..etc from palette panel.

For dependencies that supports AndroidX:

implementation 'androidx.recyclerview:recyclerview:1.1.0'
implementation 'androidx.cardview:cardview:1.0.0'

Go To this Article for full description: https://medium.com/@daryllwong/recyclerview-cardview-is-not-working-properly-dependency-problems-in-2019-e813ab48b3d4

score 2 · Answer 5 · edited Oct 04 '17 at 11:41

2

dependencies {
    ...
    compile 'com.android.support:cardview-v7:26.+'
    compile 'com.android.support:recyclerview-v7:26.+'
    ...
}

edited Oct 04 '17 at 11:41

Stephen Rauch

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answered Oct 04 '17 at 11:12

Vivek Hirpara

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score 2 · Answer 6 · edited Jun 20 '20 at 09:12

I was facing this issue because of the corruption of cached cardview aar.

Gradle was picking local cached version of cardview. Also works by changing the library version but make sure you are not overriding configurations.all

Solution:

Close Android Studio, In windows goto C:\Users\Qamar\.gradle\caches and search cardview delete your version folder, clean and rebuild.

Using: Android Studio 3.3 and gradle:3.2.1

score 0 · Answer 7 · answered Jun 25 '20 at 18:50

0

In your xml file change android.support.v7.widget.CardView to androidx.cardview.widget.CardView

answered Jun 25 '20 at 18:50

Sanket Kushwaha

3
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score 0 · Answer 8 · answered Dec 23 '20 at 17:33

0

Just click on sync now at right top side

answered Dec 23 '20 at 17:33

Bhushan

1

In order to turn this into a helpful answer it requires [edit]ing for clearer phrasing, details, explanation. – Yunnosch Dec 23 '20 at 19:30

score 0 · Answer 9 · answered Jan 29 '21 at 12:00

To avoid mistakes during adding CardView, you can use Android Studio tools. In the main menu open "Project structure...", then "Dependencies", "+" and "cardview" in the search line.

At the moment Android Studio adds 'androidx.cardview:cardview:1.0.0' line to your build.gradle file. Then you can use "<androidx.cardview.widget.CardView>" in your layouts.

Maybe after a year or two the version or the package name will change.

android.support.v7.widget.CardView could not be found (Android Studio 1.1 Preview)

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