Card_view material design

Question

I am trying to use card_view. But it keeps giving an error.

Error:(13) No resource identifier found for attribute `'cardCornerRadius' in package 'com.google.example.test_app'

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:paddingLeft="@dimen/activity_horizontal_margin"     android:paddingRight="@dimen/activity_horizontal_margin"     android:paddingTop="@dimen/activity_vertical_margin"     android:paddingBottom="@dimen/activity_vertical_margin"     android:background="#610B0B"     tools:context=".MyActivity"     android:id="@+id/myactivity ">     <android.support.v7.widget.CardView         xmlns:card_view="http://schemas.android.com/apk/res-auto"         android:id="@+id/card_view"         android:layout_width="200dp"         android:layout_height="200dp"         android:layout_gravity="center"         android:background="#fff"         card_view:cardCornerRadius="4dp">         <TextView         android:id="@+id/my_textview"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/next"         android:background="#fff"         android:elevation="5dp" />     </android.support.v7.widget.CardView> </RelativeLayout> 

What am I doing wrong here?

Answer 1

EDIT: This has been fixed in the Android 5.0 Lollipop SDK. Simply add

compile 'com.android.support:cardview-v7:21.+' 

to your build.gradle and you're good to go.

OLD answer:

You'll need to add the cardview support library dependency to build.gradle:

compile 'com.android.support:cardview-v7:21.+' 

However, due to the way Google built the library, you'll also have to compile your app using the latest "L" SDK:

compileSdkVersion "android-L" buildToolsVersion "20.0.0" 

and

minSdkVersion 14 targetSdkVersion "L" 

Note that the minSdkVersion here doesn't really matter - as long as you compile with "L" SDK, your app can only run on L device/emulator no matter what minSdkVersion is specified.

The only viable way to build with the cardview lib for earlier Android version seems to be using Eddie Ringle's workaround.

See Failure [INSTALL_FAILED_OLDER_SDK] Android-L for some related info.

Answer 2

For eclipse We need to include both the things add android.support.v7.widget.CardView as a library project and also add + check it's jar file in java build path

• Go to File -> Import -> Existing Android code into workspace --> Browse (Go to sdk/extras/android/support/v7/cardview) --> Click ok --> Click Finish
• Right click on cardview project --> Properties --> Android(Left Pane) --> Enable isLibrary (tick the checkbox) --> Apply --> ok
• Right click on your project --> Properties --> Android(Left pane) --> Add (under library) --> cardview --> apply --> ok
• Right click on your project again --> build path --> configure build path -->under libraries-->add jar-->expand cardview-->expand libs-->select android.support.v7.widget.CardView.jar

under order and export-->check android.support.v7.widget.CardView.jar-->click

Hope it will help someone.