Failed to resolve: com.android.support:cardview-v7

Question

i try to add recyclerview to my project and get this error appear and i added it from android studio dependencies

Answer 1

Just add this to your main all project level build.gradle file under allprojects()

 maven {
    url "https://maven.google.com"
 }

Answer 2

Simply change the build-version from compile 'com.android.support:appcompat-v7:26.0.0'

to

compile 'com.android.support:appcompat-v7:26.0.0-alpha1'

This will solve your problem.

Answer 3

Add this to the project level build.gradle file and it should work fine.

allprojects {
    repositories {
        google() // this is to be added if there's something already.
        jcenter()
    }
}

Answer 4

If you are using Android Studio 3.0 or above make sure your project build.gradle should have content similar to-

buildscript {                 
    repositories {
        google()  // add google() before jcenter()
        jcenter()
    }
    dependencies {            
        classpath 'com.android.tools.build:gradle:3.0.1'

    }
}

allprojects {
    repositories {
        google()  // add google() before jcenter()
        jcenter()
    }
}

And for below Android Studio 3.0 and starting from support libraries 26.+ your project build.gradle must look like this-

allprojects {
    repositories {
        jcenter()
        maven {
            url "https://maven.google.com"
        }
    }
}

Note- position really matters add google() before jcenter()

check these links below for more details-

1- Building Android Apps

2- Add Build Dependencies

3- Configure Your Build

Answer 5

If the other solutions here do not work, make sure you are not in 'offline' mode. If enabled, android will not download the required files and you will get this error.

Answer 6

This is how I have it working.

1. Add maven { url "https://maven.google.com" } as @Gabriele_Mariotti suggests above.

   allprojects {
       repositories {
           jcenter()
           maven {
               url "https://maven.google.com"
           }
       }
   }
   

2. Then on the build.gradle file inside the App folder add

   compileSdkVersion 26
   buildToolsVersion "25.0.3"
   defaultConfig {
       applicationId "com.xxx.yyy"
       minSdkVersion 16
       targetSdkVersion 26
   }
   

3. Then on the dependencies use

   dependencies {
       compile 'com.android.support:appcompat-v7:26.0.1'
       compile 'com.android.support:design:26.0.1'
       compile 'com.google.android.gms:play-services-maps:11.0.4'
       compile 'com.google.android.gms:play-services-location:11.0.4'
       compile 'com.mcxiaoke.volley:library-aar:1.0.0'
       compile 'com.android.support:cardview-v7:26.0.1'
   }